JP2009181147A - Supply method of substrate for drawing and substrate selecting device - Google Patents

Supply method of substrate for drawing and substrate selecting device Download PDF

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JP2009181147A
JP2009181147A JP2009123145A JP2009123145A JP2009181147A JP 2009181147 A JP2009181147 A JP 2009181147A JP 2009123145 A JP2009123145 A JP 2009123145A JP 2009123145 A JP2009123145 A JP 2009123145A JP 2009181147 A JP2009181147 A JP 2009181147A
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substrate
photosensitive material
pattern
defect
coated substrate
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JP4893778B2 (en
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Hideyuki Nara
秀之 奈良
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Dai Nippon Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a supply method of a substrate for drawing and a substrate selecting device, with which a substrate to be used for pattern drawing for the manufacture of a photomask and satisfying the quality specification of an aimed product is provided and a photosensitive material is not wasted, which satisfies requirements about costs and productivity. <P>SOLUTION: The supply method includes: inspecting a photosensitive material-coated substrate for defects in the photosensitive material, the substrate prepared by applying the photosensitive material on a substrate with the light-shielding film formed thereon; registering the obtained defect information in a photosensitive material defect information database; then carrying out the photosensitive material-coated substrate determining step of determining whether or not the photosensitive material-coated substrate matches an aimed product on the basis of the defect information registered in the photosensitive material defect information database and on the information of drawing; and supplying the photosensitive material-coated substrate determined as acceptable in the photosensitive material-coated substrate determining step. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、描画情報に合せて、フォトマスク作製のための描画用基板を供給する描画用基板の供給方法と基板選択装置に関し、特に、遮光膜をその一面に成膜し、感光材層を未塗布の、フォトマスク形成用の遮光膜成膜基板群の中から、遮光膜の欠陥情報と描画情報より、目的とする製品に合う遮光膜成膜基板を選択し、選択された遮光膜成膜基板の遮光膜上に、感光材を塗布して、フォトマスク作製のための描画に供与する、基板選択装置に関する。   The present invention relates to a drawing substrate supply method and a substrate selection device for supplying a drawing substrate for producing a photomask in accordance with drawing information, and in particular, a light-shielding film is formed on one surface, and a photosensitive material layer is formed. From a group of uncoated light-shielding film formation substrates for photomask formation, select a light-shielding film formation substrate that matches the target product from the defect information and drawing information of the light-shielding film, and select the selected light-shielding film formation substrate. The present invention relates to a substrate selection apparatus that applies a photosensitive material on a light-shielding film of a film substrate and supplies it to drawing for producing a photomask.

近年、電子機器の高性能化、軽薄短小の傾向から、ASICに代表される種々のLSIには、ますます高集積化、高機能化が求められるようになってきており、半導体集積回路の作製に用いられるフォトマスクにおいては、更なる高精度、高品質のパタン形成が求められるようになってきた。
従来、フォトマスク製造は、一般には、以下のように行われていた。
図8に基いて簡単に説明する。
先ず、石英などの透明基板810の上に、クロムなどの金属薄膜からなる遮光膜あるいはシフター層820をスパッタ法などにより成膜した基板(ブランクスとも言う)を用意する。(図8(a))
そして、ブランクスの遮光膜あるいはシフター層820上に、感光材層(感光性樹脂膜、感光性レジストあるいは単にレジストとも言う)830を塗布した後、加熱乾燥処理し膜に残留している溶剤の除去や金属薄膜との密着性向上を図る。(図8(b))
次に、感光材層が塗布された感光材層塗布基板の感光材層830に、EB(Electoron Beamの略で電子線のこと)、レーザー光、X線などの電離放射線840を選択的に照射し、所望のパタン形状に感光する。(図8(c))
一般にはパタン(絵柄)形成用のパタンデータにしたがい、電離放射線840を所定の装置で選択的に照射するため、これを、パタン描画ないし単に描画とも言う。
次に、感光材層830を現像してレジストパタン835を形成した(図8(d))後、レジストパタン835の開口836から露出した金属薄膜からなる遮光層820をエツチングして、遮光層パタン825を形成する。(図8(e))
最後に、レジストパタン835を除去して、遮光層パタン825をその一面に配設したフオトマスクが得られる。(図8(f))
そして、この後、検査、必要に応じて修正が行われ、所望のフォトマスクを得ていた。
In recent years, various LSIs represented by ASICs are increasingly required to have higher integration and higher functionality due to the trend toward higher performance and lighter, shorter and smaller electronic devices. For photomasks used in the field, it is required to form patterns with higher accuracy and quality.
Conventionally, photomask manufacturing is generally performed as follows.
This will be briefly described with reference to FIG.
First, a substrate (also referred to as blanks) is prepared by forming a light-shielding film or shifter layer 820 made of a metal thin film such as chromium on a transparent substrate 810 such as quartz by a sputtering method or the like. (Fig. 8 (a))
Then, a photosensitive material layer (photosensitive resin film, photosensitive resist, or simply resist) 830 is applied on the blank light-shielding film or shifter layer 820, and then heat-dried to remove the solvent remaining on the film. And improve adhesion to metal thin films. (Fig. 8 (b))
Next, ionizing radiation 840 such as EB (abbreviation of Electron Beam), laser light, X-ray, or the like is selectively irradiated to the photosensitive material layer 830 of the photosensitive material layer coated substrate on which the photosensitive material layer is applied. Then, it is exposed to a desired pattern shape. (Fig. 8 (c))
In general, ionizing radiation 840 is selectively emitted by a predetermined apparatus in accordance with pattern (pattern) pattern data, and this is also referred to as pattern drawing or simply drawing.
Next, after developing the photosensitive material layer 830 to form a resist pattern 835 (FIG. 8D), the light shielding layer 820 made of a metal thin film exposed from the opening 836 of the resist pattern 835 is etched to form a light shielding layer pattern. 825 is formed. (Fig. 8 (e))
Finally, the resist pattern 835 is removed, and a photomask in which the light shielding layer pattern 825 is disposed on one surface thereof is obtained. (Fig. 8 (f))
Thereafter, inspection and correction as necessary are performed to obtain a desired photomask.

上記フォトマスク製造において作製されるフォトマスクの品質は、パタン描画用に供用される感光材層塗布基板の品質に大きく影響を受けることは言うまでもないが、従来、パタン描画用に供用される感光材層塗布基板は、その種類も多く、管理がたいへんで、その作製過程における検査にて、一定の基準のもとに良品、不良品の判別が行われ、良品のみが用いられていたのが実際である。
しかし、目的とする製品の品質仕様も多種あり、検査にて良品になった感光材層塗布基板にも品質面や感光材層の感度に種々あるため、必ずしも、目的とする製品の品質仕様に見合った基板を選択していたとは言えず、使用する基板の選択1つで、検査、修正に及ぼす影響は大きかった。
Needless to say, the quality of the photomask manufactured in the photomask manufacturing is greatly influenced by the quality of the photosensitive material layer coated substrate used for pattern drawing. Conventionally, the photosensitive material used for pattern drawing is used. There are many types of layer-coated substrates, and they are difficult to manage. In the inspection of the manufacturing process, good products and defective products are discriminated based on certain standards, and only good products are used. It is.
However, there are various quality specifications for the target product, and the photosensitive material layer coated substrates that have been tested to be non-defective have various quality aspects and sensitivity of the photosensitive material layer. It could not be said that an appropriate substrate was selected, and the selection of the substrate to be used had a great influence on inspection and correction.

近年では、本願出願人により、感光材塗布後の、感光材層塗布基板群の中から、遮光膜欠陥情報と感光材欠陥情報と描画パタン情報より、目的とする製品に合う感光材層塗布基板を選択し、これを目的とするフォトマスク作成のための描画に供与する方法が採られ、そのための基板選択装置が提案されている。(特願2000−232215)
しかし、この方法においては、予め、遮光膜成膜基板の状態でなく、感光材塗布基板の状態で、多数用意しておき、この中から適当な基板を選択することを前提としており、実用レベルでは、感光材を塗布後、使用されない基板も多くなり、高価な感光材を無駄にすることとなり、コスト面や生産性の面で問題となっていた。
In recent years, the applicant of the present application has applied the photosensitive material layer coated substrate suitable for the target product from the light shielding film defect information, photosensitive material defect information, and drawing pattern information from the photosensitive material layer coated substrate group after the photosensitive material coating. And a method for providing the image to a drawing for producing a photomask for the purpose is proposed, and a substrate selection apparatus for that purpose has been proposed. (Japanese Patent Application 2000-232215)
However, in this method, it is assumed that a large number is prepared in advance in the state of the photosensitive material coated substrate, not in the state of the light-shielding film forming substrate, and it is assumed that an appropriate substrate is selected from these, and the practical level. Then, after the photosensitive material is applied, the number of substrates that are not used increases, and an expensive photosensitive material is wasted, which has been a problem in terms of cost and productivity.

特願2000ー232215Japanese Patent Application 2000-232215
特開2001−33941号公報JP 2001-33941 A

上記のように、LSlチップなどの半導体製品の回路が、年々、高密度化、微細化し、この作製に用いられるフォトマスクにおいては、更なる高精度、高品質のパタン形成が求められる中、目的とする製品を作製するための基板を、特に製品品質の面からうまく選択でき、且つ、コスト面や生産性の面でも対応できる、基板選択装置が求められていた。本発明は、これに対応するもので、フォトマスク作製のためのパタン描画に供用される基板選択装置で、目的とする製品の品質仕様に見合う基板を提供でき、且つ、感光材を無駄にせずに、コスト面や生産性の面でも対応できる、基板選択装置を提供しようとするものである。
同時に、作製するフォトマスクの仕様に基づく描画情報に合せて、フォトマスク作製のための描画用基板を供給する、描画用基板の供給方法で、目的とする製品の品質仕様に見合う基板を供給でき、且つ、感光材を無駄にせずに、コスト面や生産性の面でも対応できる、描画用基板の供給方法を提供しようとするものである。
As described above, the circuit of a semiconductor product such as an LSl chip has been increased in density and miniaturization year by year, and the photomask used for this production is required to form a pattern with higher accuracy and quality. In particular, there has been a demand for a substrate selection apparatus that can successfully select a substrate for producing a product to be manufactured from the standpoint of product quality, and that can also cope with cost and productivity. The present invention is corresponding to this, and is a substrate selection apparatus used for pattern drawing for photomask fabrication, which can provide a substrate that meets the quality specifications of the target product and does not waste the photosensitive material. In addition, the present invention intends to provide a substrate selection apparatus that can cope with cost and productivity.
At the same time, a drawing substrate supply method that supplies a drawing substrate for photomask production according to the drawing information based on the specifications of the photomask to be manufactured, can supply a substrate that meets the quality specifications of the target product. In addition, an object of the present invention is to provide a drawing substrate supply method that can cope with cost and productivity without wasting a photosensitive material.

本発明の描画用基板の供給方法は、作製するフォトマスクの仕様に基づく描画情報に合わせて、フォトマスク作製のための描画用基板を供給する、描画用基板の供給方法であって、遮光膜成膜基板の遮光膜上に感光材を塗布した感光材塗布基板に対し、感光材の欠陥検査を行ない、得られた欠陥情報を感光材欠陥情報データーベースに登録した後、該感光材欠陥情報データベースに登録された欠陥情報と、描画情報より、感光材塗布基板が、目的とする製品に合うか否かを判定する感光材塗布基板判定工程を行い、感光材塗布基板判定工程における判定がOKと判定された感光材塗布基板を供することを特徴とする。The drawing substrate supply method of the present invention is a drawing substrate supply method for supplying a drawing substrate for manufacturing a photomask in accordance with the drawing information based on the specifications of the photomask to be manufactured. The photosensitive material coated substrate in which the photosensitive material is coated on the light shielding film of the film forming substrate is subjected to a defect inspection of the photosensitive material, and the obtained defect information is registered in the photosensitive material defect information database, and then the photosensitive material defect information is obtained. Based on the defect information registered in the database and the drawing information, a photosensitive material coated substrate determination step is performed to determine whether the photosensitive material coated substrate matches the target product, and the determination in the photosensitive material coated substrate determination step is OK. A photosensitive material coated substrate determined to be provided.
そして、上記描画用基板の供給方法であって、前記感光材塗布基板判定工程における目的とする製品に合うか否かを判定する感光材塗布基板判定が、感光材欠陥情報から求めたランクと描画パタンのランクを考慮して感光材塗布基板を判定する基板ランク判定法、感光材欠陥位置と描画パタンエッジを考慮して基板を判定するパタンエッジ判定法、感光材欠陥位置と全描画パタンを考慮して基板を判定する全パタン判定法の1つ以上の判定方法により判定するものであることを特徴とするものである。  In the drawing substrate supplying method, the photosensitive material coated substrate determination for determining whether or not the target product in the photosensitive material coated substrate determination step is suitable for the rank and the drawing obtained from the photosensitive material defect information Substrate rank determination method for determining the photosensitive material coated substrate in consideration of the pattern rank, pattern edge determination method for determining the substrate in consideration of the photosensitive material defect position and the drawing pattern edge, taking into consideration the photosensitive material defect position and the entire drawing pattern The determination is made by one or more determination methods of all pattern determination methods for determining a substrate.
また、前記基板ランク判定方法は、描画エリアに対応する領域内の欠陥数を抽出し、その抽出された欠陥数により、前記感光材塗布基板にランク付けし、これとフォトマスク仕様からの品質基準と比較し、該感光材塗布基板が目的とする製品の描画に適用できるか否かを判断するものであることを特徴とするものである。  The substrate rank determination method extracts the number of defects in the region corresponding to the drawing area, ranks the photosensitive material coated substrate based on the extracted number of defects, and the quality standard based on the photomask specification. It is characterized in that it is determined whether or not the photosensitive material coated substrate can be applied to drawing of a target product.
また、前記パタンエッジ判定方法と前記全パタン判定方法は、フォトマスク上に欠陥が発生するまたは発生しない確率を算出し、該算出結果に基づき、感光材欠陥検査を行った感光材塗布基板が、目的とする製品の描画に適用できるか否かを判定するものであることを特徴とするものであり、検出された個々の感光材欠陥が、パタンデータエリア内の絵柄の周辺部または内部に、跨るまたは跨らない確率を計算し、更に、個々の計算結果を乗じた積を求めることにより、フォトマスク上に欠陥が発生するまたは発生しない確率を算出するものであることを特徴とするものである。  Further, the pattern edge determination method and the all pattern determination method calculate a probability that a defect occurs or does not occur on a photomask, and based on the calculation result, a photosensitive material coated substrate subjected to a photosensitive material defect inspection is an object. It is characterized by determining whether or not it can be applied to the drawing of the product, and the detected individual photosensitive material defects straddle the periphery or inside of the pattern in the pattern data area. Alternatively, the probability that a defect does not occur is calculated, and the probability of occurrence or non-occurrence of a defect on the photomask is calculated by calculating a product obtained by multiplying individual calculation results. .

本発明の基板選択装置は、作製するフォトマスクの仕様に基づく描画情報に合わせて、フォトマスク作製のための描画用基板を選択する、基板選択装置であって、遮光膜成膜基板に、所定の決められた感光材を塗布して作成された感光材塗布基板に対し、感光材欠陥検査を行ない、得られた感光材欠陥情報と蓄積する、感光材欠陥情報データベースと、該感光材欠陥情報データベースに感光材欠陥情報を登録するための感光材欠陥登録部と、感光材欠陥情報データベースに蓄積された感光材欠陥情報と、描画情報データベースに蓄積された描画情報より、1つ以上の手段で目的とする製品に適用する感光材塗布基板を判定する感光材塗布基板判定部とを有し、感光材塗布基板判定部により、目的とする製品に適用する感光材塗布基板を選択するものであることを特徴とするものである。  The substrate selection apparatus of the present invention is a substrate selection apparatus that selects a drawing substrate for photomask production in accordance with drawing information based on the specifications of the photomask to be produced. A photosensitive material defect information database for performing a photosensitive material defect inspection on the photosensitive material coated substrate prepared by applying the determined photosensitive material and storing the obtained photosensitive material defect information, and the photosensitive material defect information The photosensitive material defect registration unit for registering photosensitive material defect information in the database, the photosensitive material defect information stored in the photosensitive material defect information database, and the drawing information stored in the drawing information database are used by one or more means. A photosensitive material coated substrate determining unit that determines a photosensitive material coated substrate to be applied to a target product, and the photosensitive material coated substrate determining unit selects a photosensitive material coated substrate to be applied to the target product. It is characterized in that those.
そして、上記基板選択装置であって、感光材塗布基板判定部は、感光材欠陥情報から求めたランクと描画パタンのランクを考慮して感光材塗布基板を判定する基板ランク判定部、感光材欠陥位置と描画パタンエッジを考慮して基板を判定するパタンエッジ判定部、  In the substrate selection apparatus, the photosensitive material coated substrate determination unit determines the photosensitive material coated substrate in consideration of the rank obtained from the photosensitive material defect information and the rank of the drawing pattern, and the photosensitive material defect. A pattern edge determination unit that determines the substrate in consideration of the position and the drawing pattern edge;
感光材欠陥位置と全描画パタンを考慮して基板を判定する全パタン判定部の1つ以上を備えていることを特徴とするものである。One or more of all pattern determination units that determine the substrate in consideration of the photosensitive material defect position and the total drawing pattern are provided.
また、前記基板ランク判定装置は、描画エリアに対応する領域内の欠陥数を抽出し、その抽出された欠陥数により、前記感光材塗布基板にランク付けし、これとフォトマスク仕様からの品質基準と比較し、該感光材塗布基板が目的とする製品の描画に適用できるか否かを判断するものであることを特徴とするものである。  Further, the substrate rank determination device extracts the number of defects in the region corresponding to the drawing area, ranks the photosensitive material coated substrate according to the extracted number of defects, and quality standards based on this and the photomask specification It is characterized in that it is determined whether or not the photosensitive material coated substrate can be applied to drawing of a target product.
また、前記パタンエッジ判定部と前記全パタン判定部は、フォトマスク上に欠陥が発生するまたは発生しない確率を算出し、該算出結果に基づき、感光材欠陥検査を行った感光材塗布基板が、目的とする製品の描画に適用できるか否かを判定するものであることを特徴とするものであり、検出された個々の感光材欠陥が、パタンデータエリア内の絵柄の周辺部または内部に、跨るまたは跨らない確率を計算し、更に、個々の計算結果を乗じた積を求めることにより、フォトマスク上に欠陥が発生するまたは発生しない確率を算出するものであることを特徴とするものである。  In addition, the pattern edge determination unit and the all pattern determination unit calculate a probability that a defect occurs or does not occur on a photomask, and based on the calculation result, a photosensitive material coated substrate that has been subjected to a photosensitive material defect inspection is an object. It is characterized by determining whether or not it can be applied to the drawing of the product, and the detected individual photosensitive material defects straddle the periphery or inside of the pattern in the pattern data area. Alternatively, the probability that a defect does not occur is calculated, and the probability of occurrence or non-occurrence of a defect on the photomask is calculated by calculating a product obtained by multiplying individual calculation results. .

(作用)
本発明の描画用基板の供給方法は、このような構成にすることにより、作製するフォトマスクの仕様に基づく描画情報に合せて、フォトマスク作製のための描画用基板を供給する、描画用基板の供給方法で、目的とする製品の品質仕様に見合う基板を提供でき、且つ、感光材を無駄にせずに、コスト面や生産性の面でも対応できる、描画用基板の供給方法の提供を可能としている。
具体的には、遮光膜成膜基板の遮光膜上に感光材を塗布した感光材塗布基板に対し、感光材の欠陥検査を行ない、得られた欠陥情報を感光材欠陥情報データーベースに登録した後、該感光材欠陥情報データベースに登録された欠陥情報と、描画情報より、感光材塗布基板が、目的とする製品に合うか否かを判定する感光材塗布基板判定工程を行い、感光材塗布基板判定工程における判定がOKと判定された感光材塗布基板を供することにより、これを達成している。
(Function)
The drawing substrate supply method of the present invention has such a configuration, and supplies a drawing substrate for photomask production in accordance with drawing information based on the specifications of the photomask to be produced. With this supply method, it is possible to provide a substrate that meets the quality specifications of the target product, and to provide a drawing substrate supply method that can cope with cost and productivity without wasting photosensitive material. It is said.
Specifically, for the photosensitive material coated substrate in which the photosensitive material is coated on the light shielding film of the light shielding film deposition substrate, the photosensitive material is inspected for defects and the obtained defect information is registered in the photosensitive material defect information database. Thereafter, a photosensitive material coated substrate determination step is performed to determine whether the photosensitive material coated substrate matches the target product from the defect information registered in the photosensitive material defect information database and the drawing information. This is achieved by providing a photosensitive material coated substrate that is determined to be OK in the substrate determination step.

前記感光材塗布基板判定工程における目的とする製品に合うか否かを判定する感光材塗布基板判定としては、感光材欠陥情報から求めたランクと描画パタンのランクを考慮して感光材塗布基板を判定する基板ランク判定法、感光材欠陥位置と描画パタンエッジを考慮して基板を判定するパタンエッジ判定法、感光材欠陥位置と全描画パタンを考慮して基板を判定する全パタン判定法の1つ以上の判定方法により判定するものが挙げられる。  As the photosensitive material coated substrate determination for determining whether or not it matches the target product in the photosensitive material coated substrate determination step, the photosensitive material coated substrate is determined in consideration of the rank obtained from the photosensitive material defect information and the rank of the drawing pattern. One or more of a substrate rank determination method for determining, a pattern edge determination method for determining a substrate in consideration of a photosensitive material defect position and a drawing pattern edge, and an all pattern determination method for determining a substrate in consideration of a photosensitive material defect position and a total drawing pattern What is determined by the determination method described above.
ここにおける基板ランク判定方法は、具体的には、描画エリアに対応する領域内の欠陥数を抽出し、その抽出された欠陥数により、前記感光材塗布基板にランク付けし、これとフォトマスク仕様からの品質基準と比較し、該感光材塗布基板が目的とする製品の描画に適用できるか否かを判断するものである。  Specifically, the substrate rank determination method here extracts the number of defects in the region corresponding to the drawing area, ranks the photosensitive material coated substrate by the extracted number of defects, and the photomask specification. Compared with the quality standard from the above, it is determined whether or not the photosensitive material coated substrate can be applied to drawing of a target product.
また、ここにおけるパタンエッジ判定方法と全パタン判定方法は、具体的には、フォトマスク上に欠陥が発生するまたは発生しない確率を算出し、該算出結果に基づき、感光材欠陥検査を行った感光材塗布基板が、目的とする製品の描画に適用できるか否かを判定するものであり、更に具体的には、検出された個々の感光材欠陥が、パタンデータエリア内の絵柄の周辺部または内部に、跨るまたは跨らない確率を計算し、更に、個々の計算結果を乗じた積を求めることにより、フォトマスク上に欠陥が発生するまたは発生しない確率を算出するものである。  In addition, the pattern edge determination method and the total pattern determination method herein specifically calculate the probability that a defect occurs or does not occur on a photomask, and based on the calculation result, the photosensitive material is subjected to a defect inspection. It is used to determine whether or not the coated substrate can be applied to the drawing of the target product. More specifically, the detected photosensitive material defects are detected at the periphery or inside of the pattern in the pattern data area. In addition, the probability of straddling or not straddling is calculated, and the probability of occurrence or non-occurrence of defects on the photomask is calculated by obtaining a product obtained by multiplying the individual calculation results.

本発明の基板選択装置は、このような構成にすることにより、フォトマスク作製のためのパタン描画に供用される基板選択装置で、目的とする製品の品質仕様に見合う基板を提供でき、且つ、感光材を無駄にせずに、コスト面や生産性の面でも対応できる、基板選択装置の提供を可能としている。
具体的には、遮光膜成膜基板に、所定の決められた感光材を塗布して作成された感光材塗布基板に対し、感光材欠陥検査を行ない、得られた感光材欠陥情報と蓄積する、感光材欠陥情報データベースと、該感光材欠陥情報データベースに感光材欠陥情報を登録するための感光材欠陥登録部と、感光材欠陥情報データベースに蓄積された感光材欠陥情報と、描画情報データベースに蓄積された描画情報より、1つ以上の手段で目的とする製品に適用する感光材塗布基板を判定する感光材塗布基板判定部とを有し、感光材塗布基板判定部により、目的とする製品に適用する感光材塗布基板を選択するものであることにより、これを達成している。
The substrate selection apparatus of the present invention can provide a substrate that meets the quality specifications of the target product in such a configuration, and is a substrate selection apparatus used for pattern drawing for manufacturing a photomask. This makes it possible to provide a substrate selection device that can cope with cost and productivity without wasting photosensitive material.
Specifically, a photosensitive material defect inspection is performed on a photosensitive material coated substrate prepared by applying a predetermined photosensitive material to a light shielding film deposition substrate, and the obtained photosensitive material defect information is accumulated. A photosensitive material defect information database; a photosensitive material defect registration unit for registering photosensitive material defect information in the photosensitive material defect information database; a photosensitive material defect information stored in the photosensitive material defect information database; and a drawing information database. A photosensitive material coated substrate determination unit that determines a photosensitive material coated substrate to be applied to the target product by one or more means from the stored drawing information, and the photosensitive material coated substrate determination unit determines the target product. This is achieved by selecting a photosensitive material coated substrate to be applied to the above.

感光材塗布基板判定部には、欠陥情報から求めたランクと描画パタンのランクとを考慮して各基板を選択する基板ランク判定部、欠陥位置と描画パタンエッジを考慮して基板を選択するパタンエッジ判定部、欠陥位置と全描画パタンを考慮して基板を選択する全パタン判定部の1つ以上を備えていることにより、目的とする製品作製に使用する基板を選択することができる。  In the photosensitive material coated substrate determination unit, a substrate rank determination unit that selects each substrate in consideration of the rank obtained from the defect information and the rank of the drawing pattern, and pattern edge determination that selects the substrate in consideration of the defect position and the drawing pattern edge By including one or more of all pattern determination units that select the substrate in consideration of the part, the defect position, and the total drawing pattern, it is possible to select the substrate to be used for manufacturing the target product.

本発明は、上記のように、フォトマスク作製のためのパタン描画に供用される基板選択装置で、目的とする製品の品質仕様に見合う基板を提供でき、且つ、感光材を無駄にせずに、コスト面や生産性の面でも対応できる、基板選択装置の提供を可能とした。同時に、作製するフォトマスクの仕様に基づく描画情報に合せて、フォトマスク作製のための描画用基板を供給する、描画用基板の供給方法で、目的とする製品の品質仕様に見合う基板を供給でき、且つ、感光材を無駄にせずに、コスト面や生産性の面でも対応できる、描画用基板の供給方法の提供を可能とした。これにより、従来に比べ、フォトマスク製造のトータル的な生産性を向上させ、フォトマスクの更なる高精度化、高品質化、低コスト化にも対応できるものとした。
As described above, the present invention is a substrate selection device used for pattern drawing for photomask fabrication, and can provide a substrate that meets the quality specifications of the target product, and without wasting photosensitive material, It has become possible to provide a substrate selection device that can cope with cost and productivity. At the same time, a drawing substrate supply method that supplies a drawing substrate for photomask production according to the drawing information based on the specifications of the photomask to be manufactured, can supply a substrate that meets the quality specifications of the target product. In addition, it is possible to provide a drawing substrate supply method that can cope with cost and productivity without wasting a photosensitive material. As a result, the total productivity of photomask manufacturing is improved compared to the conventional technology, and it is possible to cope with higher accuracy, higher quality, and lower cost of photomasks.

本発明の基板選択装置の実施の形態の1例の概略構成と基板供給処理のフローを示した概略図である。 It is a schematic diagram showing a schematic configuration and board supply processing flow of an example of embodiment of the substrate selection apparatus of the present invention. ピンホール欠陥検査結果データの1例を示した図である。 It is the figure which showed one example of the pinhole defect inspection result data . 感光材ロットチェック結果データの1例を示した図である。 It is the figure which showed one example of the photosensitive material lot check result data . 品質基準の1例を示した図である。 It is the figure which showed one example of the quality standard . 基板選択の入力方法の1例を示した図である。 It is the figure which showed one example of the input method of board | substrate selection . 基板選択部のランク判定部による遮光膜成膜基板選択手順の1例を示したフロー図である。 It is the flowchart which showed one example of the light-shielding film film-forming board | substrate selection procedure by the rank determination part of a board | substrate selection part . 基板選択部のエッジ選択部による遮光膜成膜基板選択を説明するための図である。 It is a figure for demonstrating selection of the light shielding film film-forming board | substrate by the edge selection part of a board | substrate selection part . フォトマスクの製造方法を説明するための図である。 It is a figure for demonstrating the manufacturing method of a photomask .

本発明の実施の形態例を図に基づいて説明する。
図1は本発明の基板選択装置の実施の形態の1例の概略構成と基板供給処理のフローを示した概略図で、図2はピンホール欠陥検査結果データの1例を示した図で、図3は感光材ロットチェック結果データの1例を示した図で、図4は基板の品質基準の1例を示した図で、図5は、基板選択の入力方法の1例を示した図で、図6は基板選択部のランク判定部による遮光膜成膜基板選択手順の1例を示したフロー図で、図7は基板選択部のエッジ選択部による遮光膜成膜基板選択を説明するための図である。
また、図1中、S11〜S21、図6中、S510〜S540は処理ステップである。 図1、図6、図7中、110は遮光膜成膜、115は感光材塗布基板、120は遮光膜欠陥登録部、125は遮光膜欠陥情報データベース、130は基板選択部(遮光膜基板選択部とも言う)、131は基板ランク選択部、132はパタンエッジ選択部、133は全パタン選択部、140は感光材塗布基板欠陥登録部、145は感光材欠陥情報データベース、150は基板判定部(感光材塗布基板判定部とも言う)、151は基板ランク判定部、152はパタンエッジ判定部、153は全パタン判定部、170はフォトマスク仕様、180は描画情報登録部、190は描画情報データベース、511は遮光膜基板群、512は使用条件(フォトマスク仕様)、521は対象基板、522はピンホール欠陥データ、523はパタンエリア、531は品質基準、541はランク付き対象基板、601は基板エリア、605はパタンエリア(描画エリア)、611、612、613は欠陥、621、622、623は欠陥領域、631、632、633はパタンデータエリア、651、652は絵柄(パタンとも言う)である。
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing a schematic configuration of an example of an embodiment of a substrate selection apparatus of the present invention and a flow of substrate supply processing, and FIG. 2 is a diagram showing an example of pinhole defect inspection result data, FIG. 3 is a diagram showing an example of photosensitive material lot check result data, FIG. 4 is a diagram showing an example of substrate quality standards, and FIG. 5 is a diagram showing an example of an input method for substrate selection. FIG. 6 is a flowchart showing an example of a light-shielding film deposition substrate selection procedure by the rank determination unit of the substrate selection unit. FIG. 7 illustrates light-shielding film deposition substrate selection by the edge selection unit of the substrate selection unit. FIG.
In FIG. 1, S11 to S21 and S510 to S540 in FIG. 6 are processing steps. 1, 6, and 7, 110 is a light shielding film formation, 115 is a photosensitive material coated substrate, 120 is a light shielding film defect registration unit, 125 is a light shielding film defect information database, and 130 is a substrate selection unit (light shielding film substrate selection). 131 is a substrate rank selection unit, 132 is a pattern edge selection unit, 133 is an all pattern selection unit, 140 is a photosensitive material coated substrate defect registration unit, 145 is a photosensitive material defect information database, and 150 is a substrate determination unit (photosensitive). 151 is a substrate rank determination unit, 152 is a pattern edge determination unit, 153 is an all pattern determination unit, 170 is a photomask specification, 180 is a drawing information registration unit, 190 is a drawing information database, and 511 is Shielding film substrate group 512, usage conditions (photomask specifications), 521, target substrate, 522, pinhole defect data, 523, pattern area, 53 Is a quality standard, 541 is a ranked target substrate, 601 is a substrate area, 605 is a pattern area (drawing area), 611, 612, and 613 are defects, 621, 622, and 623 are defect areas, and 631, 632, and 633 are pattern data. Areas 651 and 652 are patterns (also called patterns).

本発明の基板選択装置の実施の形態例を図1に基づいて説明する。
本例は、遮光膜をその一面に成膜し、感光材層を未塗布の、フォトマスク形成用の遮光膜成膜基板群の中から、遮光膜の欠陥情報と描画情報より、目的とする製品に合う遮光膜成膜基板を選択し、選択された遮光膜成膜基板の遮光膜上に、感光材を塗布して、フォトマスク作製のための描画に供与する基板選択装置である。
そして、図1に示すように、本例の基板選択装置は、各遮光膜成膜基板110の遮光膜欠陥情報を蓄積する遮光膜欠陥情報データベース125と、該遮光膜欠陥情報データベース125に遮光膜欠陥情報を登録するための遮光膜欠陥登録部120と、描画すべきパタンの描画情報を蓄積する描画情報データベース190と、該描画情報データベースに描画すべきパタンの描画情報を登録するための描画情報登録部180と、各データベースに蓄積された描画情報と遮光膜欠陥情報から、1つ以上の手段で目的とする製品に適用できる遮光膜成膜基板110を選択する遮光膜成膜基板選択部130と、更に、遮光膜成膜基板選択部130により、選択した遮光膜成膜基板110に、所定の決められた感光材を塗布して作成された感光材塗布基板115に対し、感光材欠陥検査を行ない、得られた感光材欠陥情報を蓄積する感光材欠陥情報データベース145と、感光材欠陥情報データベース145に感光材欠陥情報を登録するための感光材欠陥登録部140と、感光材欠陥情報データベース145に蓄積された感光材欠陥情報と、描画情報データベース190に蓄積された描画情報より、1つ以上の手段で目的とする製品に適用する感光材塗布基板を判定する感光材塗布基板判定部150とを備えている。
An embodiment of the substrate selection apparatus of the present invention will be described with reference to FIG.
In this example, a light-shielding film is formed on one surface and a photosensitive material layer is not applied, and a light-shielding film-deposited substrate group for forming a photomask is used, based on defect information and drawing information of the light-shielding film. This is a substrate selection device that selects a light-shielding film-forming substrate suitable for a product, applies a photosensitive material on the light-shielding film of the selected light-shielding film-forming substrate, and provides it for drawing for producing a photomask.
As shown in FIG. 1, the substrate selection apparatus of this example includes a light shielding film defect information database 125 for accumulating light shielding film defect information of each light shielding film deposition substrate 110, and a light shielding film in the light shielding film defect information database 125. A shading film defect registration unit 120 for registering defect information, a drawing information database 190 for storing drawing information of patterns to be drawn, and drawing information for registering drawing information of patterns to be drawn in the drawing information database The light-shielding film film-forming substrate selecting part 130 that selects the light-shielding film film-forming substrate 110 applicable to the target product by one or more means from the registration unit 180 and the drawing information and light-shielding film defect information stored in each database. Further, a photosensitive material coated substrate prepared by applying a predetermined photosensitive material to the selected light shielding film deposition substrate 110 by the light shielding film deposition substrate selection unit 130. 15, a photosensitive material defect information database 145 for performing photosensitive material defect inspection and accumulating the obtained photosensitive material defect information, and a photosensitive material defect registration unit for registering photosensitive material defect information in the photosensitive material defect information database 145. 140, the photosensitive material defect information stored in the photosensitive material defect information database 145, and the drawing information stored in the drawing information database 190 determine the photosensitive material coated substrate to be applied to the target product by one or more means. And a photosensitive material coated substrate determination unit 150.

はじめに、本例の基板選択装置の各部とその処理、および基板選択装置の各部と基板供給処理のフローとの関係を、図1に基づいて簡単に説明しておく。
尚、これを以って、本発明の基板供給方法の実施の形態例の説明に代える。
先ず、石英などの透明基板の上に、クロムなどの金属薄膜からなる遮光膜あるいはシフター層をスパッタ法などにより成膜した遮光膜成膜基板(ブランクスとも言う)110(S11)に対し、所定の欠陥検査を行い(S12)、遮光膜欠陥登録部120にて、この結果を遮光膜欠陥情報として、遮光膜欠陥情報データベース125に保管する。
欠陥検査としては、通常、所定のピンホール欠陥検査機により、図2に示すように、欠陥のサイズとその欠陥座標(X,Y)を得ることができる。
次いで、基板選択部130により、描画情報データベース190に蓄積された描画情報と、遮光膜欠陥データベース125に蓄積された遮光膜欠陥情報から、1つ以上の手段で目的とする製品に適用できる遮光膜成膜基板を選択する。(S13)
描画情報は、フォトマスク仕様170に基づき描画情報データベース190に登録されるが、描画パタン情報、配置情報、描画パタンのランク付け情報等を含み、更に、細かくは、描画機、基板サイズ、遮光膜種類、等の基板条件、および、設計ルール、ピンホール欠陥検査結果ランク、異物欠陥検査結果ランク等の品質条件を含む。
基板選択部130としては、遮光膜欠陥情報から求めたランクと描画パタンのランクとを考慮して遮光膜成膜基板を選択する基板ランク選択部131、遮光膜欠陥位置と描画パタンエッジを考慮して基板を選択するパタンエッジ選択部132、遮光膜欠陥位置と全描画パタンを考慮して基板を選択する全パタン選択部133の1つ以上を基板選択手段として備えているものが挙げられる。
これらによる、基板選択については、説明を後述する。
尚、基板ランク選択部131、パタンエッジ選択部132、全パタン選択部133により実施される遮光膜成膜基板の選択方法を、ここでは、基板ランク選択法、パタンエッジ選択法、全パタン選択法と呼ぶ。
基板選択部130による、目的とする製品に見合った基板を選択する際の入力(選択指示入力に相当)は、例えば、図5に示すように表示する(コンピュータ端末の表示部の)入力画面において、描画機、基板サイズ、遮光膜種類、等の基板条件、および、設計ルール、ピンホール欠陥検査結果ランク等の品質条件を、それぞれ選択して用い、各選択部にて遮光膜成膜基板選択行なう。
First, each part of the substrate selection apparatus of this example and its processing, and the relationship between each part of the substrate selection apparatus and the flow of substrate supply processing will be briefly described with reference to FIG.
Note that this replaces the description of the embodiment of the substrate supply method of the present invention.
First, with respect to a light-shielding film formation substrate (also referred to as blanks) 110 (S11) in which a light-shielding film or shifter layer made of a metal thin film such as chromium is formed on a transparent substrate such as quartz by a sputtering method or the like, A defect inspection is performed (S12), and the result is stored in the light shielding film defect information database 125 as light shielding film defect information in the light shielding film defect registration unit 120.
As the defect inspection, usually, a predetermined pinhole defect inspection machine can obtain the defect size and the defect coordinates (X, Y) as shown in FIG.
Next, the light shielding film that can be applied to the target product by one or more means from the drawing information accumulated in the drawing information database 190 and the light shielding film defect information accumulated in the light shielding film defect database 125 by the substrate selection unit 130. A deposition substrate is selected. (S13)
The drawing information is registered in the drawing information database 190 based on the photomask specification 170, and includes drawing pattern information, arrangement information, drawing pattern ranking information, and the like. Substrate conditions such as type, and quality conditions such as design rules, pinhole defect inspection result rank, and foreign object defect inspection result rank.
As the substrate selection unit 130, a substrate rank selection unit 131 that selects a light shielding film deposition substrate in consideration of the rank obtained from the light shielding film defect information and the drawing pattern rank, and considering the light shielding film defect position and the drawing pattern edge. Examples of the substrate selection unit include one or more of a pattern edge selection unit 132 for selecting a substrate and an all pattern selection unit 133 for selecting a substrate in consideration of a light-shielding film defect position and all drawing patterns.
The substrate selection based on these will be described later.
Note that the method for selecting a light-shielding film deposition substrate performed by the substrate rank selection unit 131, the pattern edge selection unit 132, and the all pattern selection unit 133 is referred to as a substrate rank selection method, a pattern edge selection method, and an all pattern selection method. .
An input (corresponding to a selection instruction input) when the substrate selection unit 130 selects a substrate suitable for the target product is displayed on an input screen (on the display unit of the computer terminal) as shown in FIG. 5, for example. Select and use substrate conditions such as drawing machine, substrate size, type of light shielding film, and quality conditions such as design rules, pinhole defect inspection result rank, etc. Do.

次いで、基板選択部130により選択された遮光膜成膜基板に対し、遮光膜上に目的とする感光材を塗布形成し(S14)、得られた感光材塗布基板115(S15)に対し、感光材の欠陥検査を行ない(S16)、結果を感光材欠陥登録部140により、感光材欠陥データベース145に蓄積する。
感光材の欠陥検査は、通常、所定の検査機で異物欠陥の検査を行うもので、欠陥のサイズと、その欠陥座標(X,Y)を、図2に示すピンホール欠陥のように、得ることができる。
Next, the target photosensitive material is applied and formed on the light shielding film on the light shielding film deposition substrate selected by the substrate selection unit 130 (S14), and the resulting photosensitive material coated substrate 115 (S15) is photosensitive. The defect inspection of the material is performed (S16), and the result is accumulated in the photosensitive material defect database 145 by the photosensitive material defect registration unit 140.
The defect inspection of the photosensitive material is usually a foreign object defect inspection by a predetermined inspection machine, and the defect size and the defect coordinates (X, Y) are obtained like the pinhole defect shown in FIG. be able to.

次いで、基板判定部150により、描画情報データベース190に蓄積された描画情報と、感光材欠陥情報データベース125に蓄積された感光材欠陥情報から、1つ以上の手段で目的とする製品に適用できる感光材塗布基板を選択する。(S17)
基板判定部150としては、感光材欠陥情報から求めたランクと描画パタンのランクとを考慮して感光材塗布基板を判定する基板ランク判定部151、感光材欠陥位置と描画パタンエッジを考慮して基板を判定するパタンエッジ判定部152、感光材欠陥位置と全描画パタンを考慮して基板を判定する全パタン判定部153の1つ以上を基板選択手段として備えているものが挙げられる。
これらによる、基板判定についても、説明を後述する。
尚、基板ランク判定部151、パタンエッジ判定部152、全パタン判定部153により実施される感光材塗布基板の判定方法を、ここでは、基板ランク判定法、パタンエッジ判定法、全パタン判定法と呼ぶ。
基板判定部130による、目的とする製品に見合った基板を判定する際の入力(判定指示入力に相当)は、例えば、図5に示にて、ピンホール欠陥検査結果ランクを異物欠陥検査結果ランクに代えて、表示する(コンピュータ端末の表示部の)入力画面において、描画機、基板サイズ、遮光膜種類、等の基板条件、および、設計ルール、異物欠陥検査結果ランク等の品質条件を、それぞれ選択して用い、各判定部にて感光材塗布基板の判定を行なう。
Next, the substrate determination unit 150 uses the drawing information stored in the drawing information database 190 and the photosensitive material defect information stored in the photosensitive material defect information database 125 to perform photosensitive processing that can be applied to the target product by one or more means. A material coated substrate is selected. (S17)
The substrate determination unit 150 includes a substrate rank determination unit 151 that determines a photosensitive material coated substrate in consideration of the rank obtained from the photosensitive material defect information and the rank of the drawing pattern, and the substrate in consideration of the photosensitive material defect position and the drawing pattern edge. And a pattern edge determination unit 152 that determines the substrate, and an all-pattern determination unit 153 that determines the substrate in consideration of the photosensitive material defect position and the total drawing pattern.
The substrate determination based on these will also be described later.
Note that the photosensitive material coated substrate determination method performed by the substrate rank determination unit 151, the pattern edge determination unit 152, and the all pattern determination unit 153 is referred to herein as a substrate rank determination method, a pattern edge determination method, and an all pattern determination method.
The input (corresponding to the determination instruction input) when determining the substrate suitable for the target product by the substrate determination unit 130 is, for example, as shown in FIG. Instead, on the input screen to be displayed (on the display part of the computer terminal), the substrate conditions such as the drawing machine, the substrate size, the type of the light shielding film, and the quality conditions such as the design rule and the foreign substance defect inspection result rank These are selected and used, and each determination unit determines the photosensitive material coated substrate.

基板判定部150にて、OKと判断された(S19)感光材塗布基板は、感光材のロットチェックを行ない(S20)、感度に問題がなければ、パタン描画に供与される。(S21)
また、基板判定部150にて、OKでないと判断された(S19)感光材塗布基板は使用せず、再度、目的とする製品に適用できる遮光膜成膜基板を、基板選択部130により選択し(S13)、上記と同様に、再度、S14〜S17までの処理ステップを行ない、基板判定部150にて、OKと判断されるまで繰り返し行なう。
そして、OKと判断された(S19)感光材塗布基板は、先と同様に、感光材のロットチェックを行ない(S20)、感度に問題がなければ、パタン描画に供与される。(S21)
The substrate determination unit 150 determines that the photosensitive material is OK (S19). The photosensitive material-coated substrate is checked for the lot of the photosensitive material (S20). If there is no problem in sensitivity, the substrate is provided for pattern drawing. (S21)
The substrate determination unit 150 determines that the substrate is not OK (S19). The substrate selection unit 130 selects a light-shielding film deposition substrate that can be applied to the target product again without using the photosensitive material coated substrate. (S13) In the same manner as described above, the processing steps from S14 to S17 are performed again, and the process is repeated until the substrate determination unit 150 determines that it is OK.
Then, the photosensitive material coated substrate determined to be OK (S19) is subjected to the photosensitive material lot check (S20) as before, and if there is no problem in sensitivity, it is provided for pattern drawing. (S21)

ロットチェックとしては、例えば、感光材のロット毎に、テストピース(テスト用基板)を用いて、感度チエックを行い、この結果を感光材層感度ロットチェックデータとして保管して、これを元に判断しても良い。
感光材感度ロットチェックデータとしては、各基板毎に、感光材の塗布ロット(ここでは、塗布日によりロットが異なるとする)毎に、テストピース等によりその感度を調べ、対応する描画機毎にこれに合った露光量(照射量)を決め、各基板毎に、基板サイズ、遮光膜種類、感光材層種類、塗布日、描画機、露光量を対応させておくもので、例えば、図3に示すように、表される。
尚、図3中、+aは、+aだけ露光量を多くして、感光材層のロット間の感度のバラツキの補正を行っているものである。
For the lot check, for example, a sensitivity check is performed for each lot of photosensitive material using a test piece (test substrate), and the result is stored as photosensitive material layer sensitivity lot check data. You may do it.
As photosensitive material sensitivity lot check data, for each substrate, for each photosensitive material application lot (in this case, the lot differs depending on the application date), the sensitivity is checked with a test piece or the like, and for each corresponding drawing machine. A suitable exposure amount (irradiation amount) is determined, and for each substrate, a substrate size, a light shielding film type, a photosensitive material layer type, a coating date, a drawing machine, and an exposure amount are associated with each other. As shown in FIG.
In FIG. 3, + a is a correction of variation in sensitivity between lots of photosensitive material layers by increasing the exposure amount by + a.

次に、基板選択部130による、基板選択を説明する。
先ず、基板ランク選択部131により、目的とする製品に品質的に見合ったランクの遮光成膜基板を選択する第1の例のフロー(アルゴリズム)の例を図6に基づいて説明する。
図6に示す例は、基板選択の基準となるフォトマスク仕様からの基板の品質基準から、基板ランクを指定し、対応するランク付けされた遮光膜成膜基板を選択するもので、基板ランク選択部により以下のように基板選択を行なう。
遮光膜成膜基板のランク付けは、対象基板について、データベースに登録された遮光膜欠陥情報に基づき、それぞれ、作製するフォトマスクのパタンエリア(これを、描画エリアとも言う)に対応する領域内の欠陥数を抽出し、抽出された欠陥の数により、ランク付けするものである。
先ず、遮光膜成膜基板511の中から、選択指示入力により指定された、指定の描画機、基板サイズ、遮光膜種類等の使用条件512に対応する対象基板521を選択する、対象基板選択を行なう。(S510)
次いで、この対象基板521の中から、ピンホール欠陥検査結果データ522を参照にして、パタンエリアを所定のものとし、0°状態と90°回転した状態とで、パタンエリア内の欠陥数を把握しておく。(S520)
90°回転することにより、所定のパタンエリア内においても、その中に占める欠陥の数が異なることがある。
対象基板531の中から、品質基準(基板ランク)532と照らし、所望の基板ランクのものを選び、優先順位を付けたランク分けを行ない(S530)、優先順位が付けられたランク付き対象基板541を得る。
これにより、所望の遮光膜成膜基板が選択されたこととなる。
このようにして、目的とする製品の対象基板541が、ランク分けされ、更に優先順位が付けられるが、この対象基板541の中より、目的とする製品の品質仕様(品質基準)に見合った、所望の基板が選択され(S550)、感光材塗布される。(図1のS14に相当)
尚、フォトマスク仕様170から決められる基板選択の基準となる品質基準は、設計ルール、パタンエリア(X、Yサイズ)、ピンホール欠陥検査結果等によりランクを対応させたもので、例えば、図4に示すように表される。
尚、図4はラスター型のEB機(電子線描画機)による描画に供せられる基板の品質基準の例で、表の1段目は0. 25μmアドレスユニット描画で、パタンエリアが10000μm、10000μm範囲で、ピンホール欠陥検査結果ランクがA、異物欠陥検査結果ランクがBであることを意味している。
Next, substrate selection by the substrate selection unit 130 will be described.
First, an example of a flow (algorithm) of a first example in which the substrate rank selection unit 131 selects a light-shielding film-formed substrate having a rank suitable for the target product in quality will be described with reference to FIG.
In the example shown in FIG. 6, a substrate rank is designated from a photomask specification serving as a substrate selection criterion, and a corresponding ranked light shielding film deposition substrate is selected. Depending on the part, the substrate is selected as follows.
The ranking of the light-shielding film deposition substrate is based on the light-shielding film defect information registered in the database with respect to the target substrate, respectively, in the area corresponding to the pattern area (also referred to as the drawing area) of the photomask to be produced. The number of defects is extracted, and ranking is performed according to the number of extracted defects.
First, a target substrate selection is performed by selecting a target substrate 521 corresponding to a use condition 512 such as a designated drawing machine, substrate size, and light shielding film type designated by a selection instruction input from the light shielding film deposition substrate 511. Do. (S510)
Next, with reference to the pinhole defect inspection result data 522, the number of defects in the pattern area is grasped from the target substrate 521 by setting the pattern area as a predetermined one and rotating it by 0 ° and 90 °. Keep it. (S520)
By rotating 90 °, the number of defects in the pattern area may be different even in a predetermined pattern area.
The target board 531 is compared with the quality standard (board rank) 532, the board board having a desired board rank is selected, and the ranking is performed with the priority ranking (S530), and the ranking-target board 541 with the priority ranking is given. Get.
Thereby, a desired light-shielding film formation substrate is selected.
In this way, the target board 541 of the target product is ranked and further prioritized, but the target board 541 is suitable for the quality specification (quality standard) of the target product. A desired substrate is selected (S550), and a photosensitive material is applied. (Equivalent to S14 in FIG. 1)
Note that the quality standard, which is a standard for substrate selection determined from the photomask specification 170, corresponds to the rank according to the design rule, pattern area (X, Y size), pinhole defect inspection result, etc., for example, FIG. It is expressed as shown in
FIG. 4 is an example of the quality standard of a substrate used for drawing by a raster type EB machine (electron beam drawing machine). The first row of the table is 0.25 μm address unit drawing, and the pattern area is 10,000 μm and 10000 μm. This means that the pinhole defect inspection result rank is A and the foreign matter defect inspection result rank is B.

次に、基板選択部130により、目的とする製品に品質的に見合ったランクの遮光成膜基板を選択する第2の例を図7に基づいて説明する。
図7に示す例は、遮光膜欠陥位置と描画パタンエッジを考慮して基板を選択するもので、基板選択部130内のパタンエッジ選択部132により、以下のように基板選択を行なう。
第2の例は、遮光膜欠陥データベース125に登録された遮光膜欠陥検情報、と描画情報とから、基板を選択するもので、基板選択部130では、欠陥確率計算部(図示していない)にて、対象基板について、データベースに登録された欠陥検情報に基づき、それぞれ、フォトマスク上で欠陥が発生しない確率P0を求めるもので、この確率P0より、対象基板の中でランク付けを行い、所望の基板ランクのものを選ぶものである。
選ばれた遮光膜成膜基板は、感光材塗布処理(図1のS14に相当)に供される。
P0を求める際、対象基板に対し、対象基板とパタンエリアを相対的に90度ずつ回転させて、0°の場合と同様の計算を行い、それぞれの相対的な角度におけるP0を求め、それぞれの相対的な角度におけるP0を含め、対象基板の中でランク付けを行い、所望のランクのものを選ぶ。
この場合、第1の例に比べ、対象基板をさらに有効的に使用することができる。
尚、第2の例におけるP0計算方法は、欠陥が絵柄の内部に含まれる場合には、後で欠陥修正が比較的容易に行なうことができるため、これを、実作業上、後の修正作業を前提として、欠陥発生としない計算方法で、パタエッジ部のみが確率P0に関係しているので、ここではこの第2の例の基板選択処理をパタンエッジ選択処理と言い、これを行なう処理部をパタンエッジ選択部と言っている。
Next, a second example in which the substrate selection unit 130 selects a light-shielding film-forming substrate having a rank suitable for the target product in quality will be described with reference to FIG.
In the example shown in FIG. 7, the substrate is selected in consideration of the light shielding film defect position and the drawing pattern edge, and the substrate selection is performed by the pattern edge selection unit 132 in the substrate selection unit 130 as follows.
In the second example, a substrate is selected from light-shielding film defect inspection information registered in the light-shielding film defect database 125 and drawing information. The substrate selection unit 130 has a defect probability calculation unit (not shown). Then, with respect to the target substrate, based on the defect inspection information registered in the database, the probability P0 for the occurrence of no defect on the photomask is obtained, and ranking is performed among the target substrates based on this probability P0. The one with the desired substrate rank is selected.
The selected light-shielding film deposition substrate is subjected to a photosensitive material coating process (corresponding to S14 in FIG. 1).
When calculating P0, the target substrate and the pattern area are rotated by 90 degrees relative to the target substrate, and the same calculation as in the case of 0 ° is performed to determine P0 at each relative angle. Ranking is performed among the target boards including P0 at a relative angle, and a board having a desired rank is selected.
In this case, the target substrate can be used more effectively than in the first example.
In the P0 calculation method in the second example, if the defect is included in the pattern, the defect can be corrected later relatively easily. As a premise, only the pattern edge portion is related to the probability P0 in a calculation method that does not cause a defect. Therefore, here, the substrate selection processing of the second example is called pattern edge selection processing, and the processing portion that performs this is the pattern edge. It is called the selection part.

以下、対象基板とパタンエリアとがある所定の相対位置関係にある場合の、フォトマスク上で欠陥が発生しない確率P0の求め方の1例を図7に基づいて説明する。
説明を分かり易くするため、具体的な例として、基板エリア601の描画エリア(パタンエリア)605内に、欠陥が 3個(欠陥611、612、613)あり、パタンデータエリア631、632、633が3つある場合の、フォトマスク上で欠陥が発生しない確率P0の求め方を説明する。
先ず、欠陥611、612、613について、それぞれ、パタンデータエリア内の絵柄(パタンとも言う)の周辺部に跨る確率を計算し、これより、パタンデータエリア内の絵柄(パタンとも言う)の周辺部に跨がらない確率P1,P2、P3をそれぞれ計算し、P0=P1×P2×P3としてフォトマスク上で欠陥が発生しない確率P0を求める。
尚、対象基板と、パタンエリア、パタンデータエリア、パタンデータエリア内の絵柄(パタンとも言う)との位置関係は、描画パタン171、配置情報172とから決定する。 欠陥611がパタンデータエリア内の絵柄(パタンとも言う)の周辺部に跨がらない確率P1は、作製されるフォトマスク上での、欠陥611の位置に対応する、誤差を考慮した欠陥より大サイズの、欠陥領域621を求め、求められた欠陥領域621内の絵柄の周辺部に欠陥が発生しない確率である非発生確率を求める。
図7(a)の場合の、誤差を考慮した、欠陥611がこの中に入る欠陥より大サイズの、欠陥領域621(サイズL×L)内の絵柄が、図7(b)に拡大して示すように、絵柄651、652で、欠陥領域621は一辺の長さをLとする矩形領域である。
この場合、欠陥をサイズdφの円形のものとし、絵柄651、652の周辺長さの総和をS1とすると、欠陥611がパタンデータエリア内の絵柄(パタンとも言う)の周辺部に跨る確率は、近似的に(S1×d)/(L×L)として計算される。(図7(c)参照)
よって、欠陥611がパタンデータエリア内の絵柄(パタンとも言う)の周辺部に跨がらない確率P1を、近似的に、P1=1−[(S1×d)/(L×L)]として求めることができる。
同様にして、欠陥612、613がパタンデータエリア内の絵柄(パタンとも言う)の周辺部に跨がらない確率P2、P3をそれぞれ求める。
求められた、P1,P2,P3より、フォトマスク上で欠陥が発生しない確率P0が求められる。
パタンデータエリア(631、632、633に相当)が3つ以上ある場合についても、基本的には同様に計算できる。
Hereinafter, an example of how to determine the probability P0 that no defect occurs on the photomask when the target substrate and the pattern area are in a predetermined relative positional relationship will be described with reference to FIG.
To make the explanation easy to understand, as a specific example, there are three defects (defects 611, 612, 613) in the drawing area (pattern area) 605 of the substrate area 601, and pattern data areas 631, 632, 633 are included. A method for obtaining the probability P0 that no defect occurs on the photomask when there are three will be described.
First, for each of the defects 611, 612, and 613, the probability of straddling the peripheral portion of the pattern (also referred to as a pattern) in the pattern data area is calculated, and from this, the peripheral portion of the pattern (also referred to as a pattern) in the pattern data area is calculated. Probabilities P1, P2, and P3 that do not straddle are calculated, and the probability P0 that no defect occurs on the photomask is obtained as P0 = P1 × P2 × P3.
The positional relationship between the target substrate and the pattern area, the pattern data area, and the pattern (also referred to as a pattern) in the pattern data area is determined from the drawing pattern 171 and the arrangement information 172. The probability P1 that the defect 611 does not straddle the periphery of the pattern (also referred to as a pattern) in the pattern data area is larger than the defect in consideration of the error corresponding to the position of the defect 611 on the photomask to be manufactured. The defect area 621 is obtained, and the non-occurrence probability that is the probability that no defect occurs in the peripheral portion of the pattern in the obtained defect area 621 is obtained.
The pattern in the defect region 621 (size L × L), which is larger than the defect that the defect 611 enters in consideration of the error in the case of FIG. 7A, is enlarged to FIG. 7B. As shown, the defect area 621 is a rectangular area having a length L of one side in the patterns 651 and 652.
In this case, assuming that the defect has a circular shape of size dφ and the sum of the peripheral lengths of the patterns 651 and 652 is S1, the probability that the defect 611 straddles the periphery of the pattern (also referred to as a pattern) in the pattern data area is Approximately calculated as (S1 × d) / (L × L). (See Fig. 7 (c))
Therefore, the probability P1 that the defect 611 does not straddle the periphery of the pattern (also referred to as a pattern) in the pattern data area is approximately obtained as P1 = 1 − [(S1 × d) / (L × L)]. be able to.
Similarly, probabilities P2 and P3 that the defects 612 and 613 do not straddle the peripheral portion of the pattern (also referred to as a pattern) in the pattern data area are obtained.
From the obtained P1, P2, and P3, a probability P0 that a defect does not occur on the photomask is obtained.
In the case where there are three or more pattern data areas (corresponding to 631, 632, and 633), the calculation can be basically performed in the same manner.

次に、基板ランク選択部130により、目的とする製品に品質的に見合ったランクの遮光成膜基板を選択する第3の例を簡単に説明する。
第3の例は、遮光膜欠陥位置と全描画パタン領域とを考慮して基板を選択するもので、基板選択部130内の全パタン選択部(図示していない)により、以下のように基板選択を行なう。
第3の例も、遮光膜欠陥データベース125に登録された遮光膜欠陥検情報、と描画情報とから、基板を選択するもので、第2の例と同様、基板選択部130では、欠陥確率計算部(図示していない)にて、対象基板について、データベースに登録された欠陥検情報に基づき、それぞれ、フォトマスク上で欠陥が発生しない確率P01を求めるもので、この確率P01より、対象基板の中でランク付けを行い、所望の基板ランクのものを選ぶものであるが、第3の例の場合は、第2の例のようにパタンエッジのみを対象とせず、全パタン領域について欠陥が発生する確率を求める。
例えば、図7(b)のような欠陥領域621において、
サイズdφの円形の欠陥611がパタンデータエリア内の絵柄(パタンとも言う)に跨る確率は、Sd/(L×L)として計算される。
但し、Sdは絵柄651、652を、それぞれ外側にd/2だけ太らせた場合の面積の和である。
これより、欠陥611がパタンデータエリア内の絵柄(パタンとも言う)に跨がらない確率P11は、P11=1−[Sd/(L×L)]として求められる。 同様に、欠陥612、613がパタンデータエリア内の絵柄(パタンとも言う)に跨がらない確率P12、P13を求めることができ、求められた、P11,P21,P31より、絵柄の内部にある場合も含め、フォトマスク上で欠陥が発生しない確率P01を求めることができる。
Next, a third example will be briefly described in which the substrate rank selection unit 130 selects a light-shielding film-formed substrate having a rank that matches the target product in quality.
In the third example, the substrate is selected in consideration of the light-shielding film defect position and the entire drawing pattern region. The substrate is selected by the all pattern selection unit (not shown) in the substrate selection unit 130 as follows. Make a selection.
The third example also selects a substrate from the light shielding film defect inspection information registered in the light shielding film defect database 125 and the drawing information. As in the second example, the substrate selection unit 130 calculates the defect probability. Unit (not shown) obtains a probability P01 that a defect does not occur on the photomask based on the defect inspection information registered in the database for the target substrate. performed ranked middle, but is intended to choose the ones desired substrate rank, in the case of the third example, not intended for Patan'ejji only as in the second embodiment, a defect occurs about the entire pattern area Find the probability of doing.
For example, in the defect region 621 as shown in FIG.
The probability that a circular defect 611 of size dφ straddles a pattern (also referred to as a pattern) in the pattern data area is calculated as Sd / (L × L).
However, Sd is the sum of the areas when the patterns 651 and 652 are thickened by d / 2 outward.
Thus, the probability P11 that the defect 611 does not straddle the pattern (also referred to as a pattern) in the pattern data area is obtained as P11 = 1− [Sd / (L × L)]. Similarly, the probabilities P12 and P13 in which the defects 612 and 613 do not straddle the pattern (also referred to as a pattern) in the pattern data area can be obtained, and the obtained P11, P21, and P31 are inside the pattern. The probability P01 that no defect occurs on the photomask can be obtained.

次いで、基板判定部150による、基板判定を説明する。
先にも述べたように、基板判定部150としては、感光材欠陥情報から求めたランクと描画パタンのランクとを考慮して感光材塗布基板を判定する基板ランク判定部、感光材欠陥位置と描画パタンエッジを考慮して基板を判定するパタンエッジ判定部、感光材欠陥位置と全描画パタンを考慮して基板を判定する全パタン判定部の1つ以上を基板選択手段として備えているものが挙げられる。
基板ランク判定部150は、感光材塗布基板115に対し、基板選択部130の基板ランク選択部の処理の欠陥算出と同様にして、欠陥数を算出し、ランク付けし、これとフォトマスク仕様からの品質基準と比較し、目的とする製品の描画に適用できるか否かを判断するものである。
また、パタンエッジ判定部は、感光材塗布基板115に対し、基板選択部130のパタンエッジ選択部の処理の確率算出と同様にして、確率P0を算出し、これより、目的とする製品の描画に適用できるか否かを判断するものである。
また、全パタン判定部は、感光材塗布基板115に対し、基板選択部130の全パタン選択部の処理の確率算出と同様にして、確率P01を算出し、これより、目的とする製品の描画に適用できるか否かを判断するものである。
Next, substrate determination by the substrate determination unit 150 will be described.
As described above, as the substrate determination unit 150, the substrate rank determination unit that determines the photosensitive material coated substrate in consideration of the rank obtained from the photosensitive material defect information and the rank of the drawing pattern, the photosensitive material defect position, Examples of the substrate selection unit include one or more of a pattern edge determination unit that determines a substrate in consideration of a drawing pattern edge and an all pattern determination unit that determines a substrate in consideration of a photosensitive material defect position and an entire drawing pattern. .
The substrate rank determination unit 150 calculates and ranks the number of defects with respect to the photosensitive material coated substrate 115 in the same manner as the defect calculation of the processing of the substrate rank selection unit of the substrate selection unit 130, and ranks this from the photomask specification. It is judged whether it can apply to drawing of the target product compared with the quality standard.
In addition, the pattern edge determination unit calculates the probability P 0 for the photosensitive material coated substrate 115 in the same manner as the calculation of the processing probability of the pattern edge selection unit of the substrate selection unit 130, thereby drawing the target product. It is determined whether or not it can be applied.
Further, the all pattern determination unit calculates the probability P01 for the photosensitive material coated substrate 115 in the same manner as the processing probability calculation of the all pattern selection unit of the substrate selection unit 130, and thereby draws the target product. It is determined whether or not it can be applied.

110 遮光膜成膜
115 感光材塗布基板
120 遮光膜欠陥登録部
125 遮光膜欠陥情報データベース
130 基板選択部(遮光膜基板選択部とも言う)
131 基板ランク選択部
132 パタンエッジ選択部
133 全パタン選択部
140 感光材塗布基板欠陥登録部
145 感光材欠陥情報データベース
150 基板判定部(感光材塗布基板判定部とも言う)
151 基板ランク判定部
152 パタンエッジ判定部
153 全パタン判定部
170 フォトマスク仕様
180 描画情報登録部
190 描画情報データベース
511 遮光膜基板群
512 使用条件(フォトマスク仕様)
521 対象基板
522 ピンホール欠陥データ
523 パタンエリア
531 品質基準
541 ランク付き対象基板
601 基板エリア
605 パタンエリア(描画エリア)
611、612、613 欠陥
621、622、623 欠陥領域
631、632、633 パタンデータエリア
651、652 絵柄(パタンとも言う)
810 透明基板
820 遮光膜あるいはシフター層
825 遮光層パタン
830 感光材層(感光性樹脂膜、感光性レジストあるいは単にレジストとも言う)
835 レジストパタン
840 電離放射線
110 Light-shielding film formation 115 Photosensitive material application substrate 120 Light-shielding film defect registration unit 125 Light-shielding film defect information database 130 Substrate selection unit (also referred to as a light-shielding film substrate selection unit)
131 substrate rank selection unit 132 pattern edge selection unit 133 all pattern selection unit 140 photosensitive material application substrate defect registration unit 145 photosensitive material defect information database 150 substrate determination unit (also referred to as photosensitive material application substrate determination unit)
151 Substrate rank determination unit 152 Pattern edge determination unit 153 All pattern determination unit 170 Photomask specification 180 Drawing information registration unit 190 Drawing information database 511 Light-shielding film substrate group 512 Usage conditions (photomask specification)
521 Target substrate 522 Pinhole defect data 523 Pattern area 531 Quality standard 541 Rank target substrate 601 Substrate area 605 Pattern area (drawing area)
611, 612, 613 Defect 621, 622, 623 Defect area 631, 632, 633 Pattern data area 651, 652 Pattern (also called pattern)
810 Transparent substrate 820 Light shielding film or shifter layer 825 Light shielding layer pattern 830 Photosensitive material layer (also referred to as photosensitive resin film, photosensitive resist, or simply resist)
835 resist pattern 840 ionizing radiation

Claims (10)

作製するフォトマスクの仕様に基づく描画情報に合わせて、フォトマスク作製のための描画用基板を供給する、描画用基板の供給方法であって、  According to drawing information based on the specifications of the photomask to be manufactured, a drawing substrate supply method for supplying a drawing substrate for photomask manufacturing,
遮光膜成膜基板の遮光膜上に感光材を塗布した感光材塗布基板に対し、感光材の欠陥検査を行ない、Perform a defect inspection of the photosensitive material on the photosensitive material coated substrate in which the photosensitive material is coated on the light shielding film of the light shielding film deposition substrate,
得られた欠陥情報を感光材欠陥情報データーベースに登録した後、After registering the obtained defect information in the photosensitive material defect information database,
該感光材欠陥情報データベースに登録された欠陥情報と、描画情報より、From the defect information registered in the photosensitive material defect information database and the drawing information,
感光材塗布基板が、目的とする製品に合うか否かを判定する感光材塗布基板判定工程を行い、Perform a photosensitive material coated substrate determination process to determine whether the photosensitive material coated substrate matches the target product,
感光材塗布基板判定工程における判定がOKと判定された感光材塗布基板を供することを特徴とする描画用基板の供給方法。A method for supplying a drawing substrate, comprising providing a photosensitive material coated substrate determined to be OK in the photosensitive material coated substrate determination step.
請求項1に記載の描画用基板の供給方法であって、  A method for supplying a drawing substrate according to claim 1,
前記感光材塗布基板判定工程における目的とする製品に合うか否かを判定する感光材塗布基板判定が、The photosensitive material coated substrate determination for determining whether or not it matches the target product in the photosensitive material coated substrate determination step,
感光材欠陥情報から求めたランクと描画パタンのランクを考慮して感光材塗布基板を判定する基板ランク判定法、Substrate rank determination method for determining the photosensitive material coated substrate in consideration of the rank obtained from the photosensitive material defect information and the rank of the drawing pattern,
感光材欠陥位置と描画パタンエッジを考慮して基板を判定するパタンエッジ判定法、A pattern edge determination method for determining a substrate in consideration of a photosensitive material defect position and a drawing pattern edge,
感光材欠陥位置と全描画パタンを考慮して基板を判定する全パタン判定法All pattern judgment method to determine substrate considering photosensitive material defect position and all drawing patterns
の1つ以上の判定方法により判定するものであることを特徴とする描画用基板の供給方法。A method for supplying a drawing substrate, wherein the determination is performed by one or more determination methods.
請求項2に記載の描画用基板の供給方法であって、  A method for supplying a drawing substrate according to claim 2,
前記基板ランク判定方法は、The substrate rank determining method is:
描画エリアに対応する領域内の欠陥数を抽出し、その抽出された欠陥数により、前記感光材塗布基板にランク付けし、Extract the number of defects in the area corresponding to the drawing area, and rank the photosensitive material coated substrate by the extracted number of defects,
これとフォトマスク仕様からの品質基準と比較し、Compare this with quality standards from photomask specifications,
該感光材塗布基板が目的とする製品の描画に適用できるか否かを判断するものであることを特徴とするIt is determined whether or not the photosensitive material coated substrate is applicable to drawing of a target product.
描画用基板の供給方法。A method for supplying a drawing substrate.
請求項2ないし3のいずれか1項に記載の描画用基板の供給方法であって、  A method for supplying a drawing substrate according to any one of claims 2 to 3,
前記パタンエッジ判定方法と前記全パタン判定方法は、The pattern edge determination method and the all pattern determination method are:
フォトマスク上に欠陥が発生するまたは発生しない確率を算出し、Calculate the probability that a defect will or will not occur on the photomask,
該算出結果に基づき、感光材欠陥検査を行った感光材塗布基板が、目的とする製品の描画に適用できるか否かを判定するものであることを特徴とするBased on the calculation result, it is determined whether or not the photosensitive material coated substrate subjected to the photosensitive material defect inspection is applicable to drawing of a target product.
描画用基板の供給方法。A method for supplying a drawing substrate.
請求項4に記載の描画用基板の供給方法であって、  A method for supplying a drawing substrate according to claim 4,
検出された個々の感光材欠陥が、パタンデータエリア内の絵柄の周辺部または内部に、跨るまたは跨らない確率を計算し、Calculate the probability that each detected photosensitive material defect will or will not straddle the periphery or inside of the pattern in the pattern data area,
更に、個々の計算結果を乗じた積を求めることにより、Furthermore, by calculating the product of the individual calculation results,
フォトマスク上に欠陥が発生するまたは発生しない確率を算出するものであることを特徴とするCalculating the probability of occurrence or non-occurrence of defects on a photomask
描画用基板の供給方法。A method for supplying a drawing substrate.
作製するフォトマスクの仕様に基づく描画情報に合わせて、フォトマスク作製のための描画用基板を選択する、基板選択装置であって、  A substrate selection device that selects a drawing substrate for photomask production in accordance with drawing information based on the specifications of a photomask to be produced,
遮光膜成膜基板に、所定の決められた感光材を塗布して作成された感光材塗布基板に対し、感光材欠陥検査を行ない、得られた感光材欠陥情報と蓄積する、感光材欠陥情報データベースと、Photosensitive material defect information is obtained by performing a photosensitive material defect inspection on a photosensitive material coated substrate prepared by applying a predetermined photosensitive material to a light-shielding film deposition substrate, and accumulating the obtained photosensitive material defect information. A database,
該感光材欠陥情報データベースに感光材欠陥情報を登録するための感光材欠陥登録部と、感光材欠陥情報データベースに蓄積された感光材欠陥情報と、描画情報データベースに蓄積された描画情報より、1つ以上の手段で目的とする製品に適用する感光材塗布基板を判定する感光材塗布基板判定部とを有し、From the photosensitive material defect registration unit for registering photosensitive material defect information in the photosensitive material defect information database, photosensitive material defect information stored in the photosensitive material defect information database, and drawing information stored in the drawing information database, 1 A photosensitive material coated substrate determination unit for determining a photosensitive material coated substrate to be applied to a target product by two or more means,
感光材塗布基板判定部により、目的とする製品に適用する感光材塗布基板を選択するものであることを特徴とするThe photosensitive material coated substrate determination unit selects a photosensitive material coated substrate to be applied to a target product.
基板選択装置。Board selection device.
請求項6に記載の基板選択装置であって、  The substrate selection device according to claim 6,
感光材塗布基板判定部は、The photosensitive material coated substrate determination unit
感光材欠陥情報から求めたランクと描画パタンのランクを考慮して感光材塗布基板を判定する基板ランク判定部、A substrate rank determination unit that determines the photosensitive material coated substrate in consideration of the rank obtained from the photosensitive material defect information and the rank of the drawing pattern;
感光材欠陥位置と描画パタンエッジを考慮して基板を判定するパタンエッジ判定部、A pattern edge determination unit for determining a substrate in consideration of a photosensitive material defect position and a drawing pattern edge;
感光材欠陥位置と全描画パタンを考慮して基板を判定する全パタン判定部の1つ以上を備えていることを特徴とするOne or more of all pattern determination units for determining a substrate in consideration of a photosensitive material defect position and a total drawing pattern are provided.
基板選択装置。Board selection device.
請求項7に記載の基板選択装置であって、  The substrate selection device according to claim 7,
前記基板ランク判定装置は、The substrate rank determination device
描画エリアに対応する領域内の欠陥数を抽出し、その抽出された欠陥数により、前記感光材塗布基板にランク付けし、Extract the number of defects in the area corresponding to the drawing area, and rank the photosensitive material coated substrate by the extracted number of defects,
これとフォトマスク仕様からの品質基準と比較し、Compare this with quality standards from photomask specifications,
該感光材塗布基板が目的とする製品の描画に適用できるか否かを判断するものであることを特徴とするIt is determined whether or not the photosensitive material coated substrate is applicable to drawing of a target product.
基板選択装置。Board selection device.
請求項7ないし8のいずれか1項に記載の基板選択装置であって、A substrate selection apparatus according to any one of claims 7 to 8,
前記パタンエッジ判定部と前記全パタン判定部は、The pattern edge determination unit and the all pattern determination unit are:
フォトマスク上に欠陥が発生するまたは発生しない確率を算出し、Calculate the probability that a defect will or will not occur on the photomask,
該算出結果に基づき、感光材欠陥検査を行った感光材塗布基板が、目的とする製品の描画に適用できるか否かを判定するものであることを特徴とするBased on the calculation result, it is determined whether or not the photosensitive material coated substrate subjected to the photosensitive material defect inspection is applicable to drawing of a target product.
基板選択装置。Board selection device.
請求項9に記載の基板選択装置であって、The substrate selection apparatus according to claim 9, wherein
検出された個々の感光材欠陥が、パタンデータエリア内の絵柄の周辺部または内部に、跨るまたは跨らない確率を計算し、Calculate the probability that each detected photosensitive material defect will or will not straddle the periphery or inside of the pattern in the pattern data area,
更に、個々の計算結果を乗じた積を求めることにより、Furthermore, by calculating the product of the individual calculation results,
フォトマスク上に欠陥が発生するまたは発生しない確率を算出するものであることを特徴とするCalculating the probability of occurrence or non-occurrence of defects on a photomask
基板選択装置。Board selection device.
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