JP2009099755A - Thin-film resistor, and its manufacturing method - Google Patents

Thin-film resistor, and its manufacturing method Download PDF

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JP2009099755A
JP2009099755A JP2007269709A JP2007269709A JP2009099755A JP 2009099755 A JP2009099755 A JP 2009099755A JP 2007269709 A JP2007269709 A JP 2007269709A JP 2007269709 A JP2007269709 A JP 2007269709A JP 2009099755 A JP2009099755 A JP 2009099755A
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Koji Matai
浩司 又井
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Seiko NPC Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a thin-film resistor, which improves controllability of a resistance value by forming a thin-film resistance layer without damaging it, and is advantageous even for miniaturization. <P>SOLUTION: The method of manufacturing a thin-film resistor sequentially executes steps of: forming a pattern of the thin-film resistance layer 3 on an insulating layer 2 formed on a semiconductor substrate 1; forming metal layers 6 in a wire connection region of the thin-film resistance layer 3 by using a resist pattern; forming an interlayer dielectric 7 for covering the entire thin-film resistance layer 3 including the metal layers 6 after removing the resist; forming openings (contact holes) 10 reaching the metal layers 6 on the interlayer dielectric 7; and forming wiring layers 12 connected to the metal layers 6 in regions including at least the openings (contact holes) 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、集積回路装置などに用いる薄膜抵抗体及びその製造方法に関する。   The present invention relates to a thin film resistor used in an integrated circuit device or the like and a method for manufacturing the same.

従来の薄膜抵抗体の製造においては、薄膜抵抗層上の層間絶縁膜に前記薄膜抵抗層に達する開口部(コンタクトホール)をドライエッチングで形成する際に、前記薄膜抵抗層は通常10〜20nm程度と薄いため、開口部の下部に対応する薄膜抵抗層もエッチングされてしまい、製造された薄膜抵抗体に、抵抗精度の悪化や、コンタクト不良による信頼性の悪化が生じるという不都合があった。この不都合を回避するために、ドライエッチングに換えてウェットエッチングで形成することも行われているが、これによると、開口部の穴径の精度を出すことが困難で、穴径が大きくなりがちであり、近年のタングステンプラグに対応できないほか、穴径のバラツキが大きいので、抵抗値を規定する2つの開口部間の距離が不均一になるため、抵抗値の個々の精度バラツキが大きいという新たな不都合を生じていた。   In the manufacture of a conventional thin film resistor, when an opening (contact hole) reaching the thin film resistor layer is formed in the interlayer insulating film on the thin film resistor layer by dry etching, the thin film resistor layer is usually about 10 to 20 nm. Therefore, the thin film resistor layer corresponding to the lower portion of the opening is also etched, and the manufactured thin film resistor has a disadvantage that the resistance accuracy is deteriorated and the reliability is deteriorated due to contact failure. In order to avoid this inconvenience, wet etching is also used instead of dry etching. However, according to this, it is difficult to obtain the accuracy of the hole diameter of the opening, and the hole diameter tends to be large. In addition to being compatible with recent tungsten plugs, the variation in the hole diameter is large, so the distance between the two openings that define the resistance value is non-uniform, so the individual accuracy variation in resistance value is large. Caused inconvenience.

従来、上記各不都合を解消するものとして、半導体基板の主面側に形成された下層絶縁層上に、高融点金属層をパターニングして第1導電層を形成し、この第1導電層上に薄膜抵抗層の端部が重なるよう形成し、前記第1導電層と前記薄膜抵抗層との上に形成した層間絶縁層に、前記第1導電層に達する開口部(コンタクトホール)を形成し、この開口部に対応して前記第1導電層と接続する第2導電層を形成してなる薄膜抵抗体及びその製造方法が知られている(特許文献1)。   Conventionally, in order to solve the above problems, a refractory metal layer is patterned on a lower insulating layer formed on the main surface side of a semiconductor substrate to form a first conductive layer, and the first conductive layer is formed on the first conductive layer. Forming an opening (contact hole) reaching the first conductive layer in an interlayer insulating layer formed on the first conductive layer and the thin film resistive layer, and forming an end portion of the thin film resistive layer overlapping; A thin film resistor formed by forming a second conductive layer connected to the first conductive layer corresponding to the opening and a manufacturing method thereof are known (Patent Document 1).

特開平5−175428号公報JP-A-5-175428

この特許文献1に記載の薄膜抵抗体及びその製造方法は、開口部を薄膜抵抗層ではなく、第1導電層に達するよう形成することにより、ドライエッチングで開口部を形成する際の薄膜抵抗層に対する悪影響を回避している。しかし、この製造方法による薄膜抵抗体は、第1導電層上に薄膜抵抗層の端部が重なるよう形成するので、前記第1導電層は、開口部に対応するのみならず薄膜抵抗層の端部を接続しうる大きさを有する必要があり、薄膜抵抗体の微細化、ひいてはこの薄膜抵抗体を組み込む装置の小型化には十分に対応できないという不都合がある。本発明は、この不都合を解消した薄膜抵抗体及びその製造方法を提供することを目的とする。   In the thin film resistor and the manufacturing method thereof described in Patent Document 1, the opening is formed so as to reach the first conductive layer instead of the thin film resistance layer, thereby forming the thin film resistance layer when the opening is formed by dry etching. The adverse effect on is avoided. However, since the thin film resistor according to this manufacturing method is formed so that the end of the thin film resistor layer overlaps the first conductive layer, the first conductive layer not only corresponds to the opening but also the end of the thin film resistor layer. It is necessary to have a size capable of connecting the parts, and there is a disadvantage that the thin film resistor cannot be sufficiently miniaturized, and thus the size of a device incorporating the thin film resistor cannot be sufficiently met. It is an object of the present invention to provide a thin film resistor and a method for manufacturing the same that have solved this inconvenience.

本発明に係る薄膜抵抗体は、薄膜抵抗層のパターンと、前記薄膜抵抗層上に設定した配線接続領域に積層された金属層と、前記薄膜抵抗層全体を覆うように形成された層間絶縁膜と、この層間絶縁膜に形成された開口部を介して前記金属層と接続する配線層とを有するものである。   A thin film resistor according to the present invention includes a pattern of a thin film resistor layer, a metal layer laminated in a wiring connection region set on the thin film resistor layer, and an interlayer insulating film formed so as to cover the entire thin film resistor layer And a wiring layer connected to the metal layer through an opening formed in the interlayer insulating film.

上記開口部は、層間絶縁膜にレジストのパターンを用いて前記開口部に対応する開口を形成した後、ドライエッチングにより形成したものである。   The opening is formed by dry etching after forming an opening corresponding to the opening using a resist pattern in the interlayer insulating film.

本発明に係る薄膜抵抗体の製造方法は、半導体基板上に設けた絶縁層上に薄膜抵抗層のパターンを形成する工程と、レジストのパターンを用いて前記薄膜抵抗層の配線接続領域に金属層を形成する工程と、前記レジストを除去した後に前記金属層を含む薄膜抵抗層全体を覆うように層間絶縁膜を形成する工程と、前記層間絶縁膜に前記金属層に達する開口部(コンタクトホール)を形成する工程と、少なくとも前記開口部を含む領域に前記金属層と接続される配線層を形成する工程とを、順次施すものである。   The thin film resistor manufacturing method according to the present invention includes a step of forming a thin film resistor layer pattern on an insulating layer provided on a semiconductor substrate, and a metal layer in a wiring connection region of the thin film resistor layer using a resist pattern. Forming an interlayer insulating film so as to cover the entire thin film resistor layer including the metal layer after removing the resist, and an opening (contact hole) reaching the metal layer in the interlayer insulating film And a step of forming a wiring layer connected to the metal layer in a region including at least the opening.

上記金属層を形成する工程は、レジストのパターニングにより開口を形成した後、例えば、全面にモリブデン、タングステン、チタンなどの高融点金属をスパッタリングしたうえ、レジストを除去して、前記開口に対応して金属層を形成したり、また、例えば、前記開口内に銅などの金属をメッキして金属層を形成するものである。   In the step of forming the metal layer, after an opening is formed by patterning a resist, for example, a refractory metal such as molybdenum, tungsten, or titanium is sputtered on the entire surface, and then the resist is removed to correspond to the opening. A metal layer is formed, or a metal layer is formed by, for example, plating a metal such as copper in the opening.

また、上記開口部(コンタクトホール)を形成する工程は、層間絶縁膜にレジストのパターンを用いて開口部に対応する開口を形成した後、ドライエッチングで開口に対応する開口部を形成し、次いで、レジストを除去すると好適である。   In the step of forming the opening (contact hole), an opening corresponding to the opening is formed in the interlayer insulating film using a resist pattern, and then an opening corresponding to the opening is formed by dry etching. It is preferable to remove the resist.

本発明の薄膜抵抗体によれば、薄膜抵抗層上に金属層を設けるので微細に形成できるという効果を奏する。また、本発明の薄膜抵抗体の製造方法によれば、次のような効果を奏する。抵抗の実効部分となる配線接続領域の金属層間の距離の精度は、レジストのパターニング精度で決まるので、極めて高精度に金属層間の距離を設定でき、抵抗値の制御性が向上する。また、層間絶縁膜に形成する開口部を、ドライエッチングで形成しても、金属層により薄膜抵抗層が保護されるので、薄膜抵抗層が損傷する虞がない。さらに、薄膜抵抗体の周辺に形成されたトランジスタにおけるコンタクト形成工程と同様に、前記開口部の形成にはドライエッチングを利用でき、前記金属層の形成にはタングステンプラグが利用できるので、薄膜抵抗体の微細化に有利である。   According to the thin film resistor of the present invention, since the metal layer is provided on the thin film resistor layer, there is an effect that it can be formed finely. Moreover, according to the manufacturing method of the thin film resistor of this invention, there exist the following effects. Since the accuracy of the distance between the metal layers in the wiring connection region, which is the effective part of the resistance, is determined by the resist patterning accuracy, the distance between the metal layers can be set with extremely high accuracy, and the controllability of the resistance value is improved. Further, even if the opening formed in the interlayer insulating film is formed by dry etching, the thin film resistance layer is protected by the metal layer, so that the thin film resistance layer is not damaged. Furthermore, as in the contact formation step in the transistor formed around the thin film resistor, dry etching can be used to form the opening, and a tungsten plug can be used to form the metal layer. This is advantageous for miniaturization.

以下、本発明の好適な実施形態を添付図面の図1〜図19に基づいて説明する。ここにおいて、図1〜図9は第1実施形態の製造方法における各製造工程を示す概略的な断面図であり、図10〜図19は第2実施形態の製造方法における各製造工程を示す概略的な断面図である。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to FIGS. Here, FIGS. 1 to 9 are schematic cross-sectional views showing the respective manufacturing steps in the manufacturing method of the first embodiment, and FIGS. 10 to 19 are schematic views showing the respective manufacturing steps in the manufacturing method of the second embodiment. FIG.

まず、本発明に係る薄膜抵抗体の構成を説明するが、図9及び図19に示す各実施形態で製造された薄膜抵抗体の構成は同一であるから、図9に示す薄膜抵抗体についてのみ説明する。図9に示すように、薄膜抵抗体は、半導体基板1に形成された絶縁層2上に、薄膜抵抗材料をパターニングして薄膜抵抗層3を形成し、前記薄膜抵抗層3上に設定した配線接続領域に金属層6を積層し、この金属層6及び前記薄膜抵抗層3全体を覆うように層間絶縁膜7を形成し、この層間絶縁膜7にレジストのパターンを用いて開口を形成した後(図5参照)、ドライエッチングにより形成された開口部(コンタクトホール)10内に金属層11を堆積し、この金属層11を介して前記金属層6と接続する金属配線層12を形成してなる。   First, the configuration of the thin film resistor according to the present invention will be described. Since the configuration of the thin film resistor manufactured in each embodiment shown in FIGS. 9 and 19 is the same, only the thin film resistor shown in FIG. explain. As shown in FIG. 9, the thin film resistor is formed by patterning a thin film resistor material on the insulating layer 2 formed on the semiconductor substrate 1 to form the thin film resistor layer 3, and the wiring set on the thin film resistor layer 3. After the metal layer 6 is laminated in the connection region, an interlayer insulating film 7 is formed so as to cover the metal layer 6 and the entire thin film resistance layer 3, and an opening is formed in the interlayer insulating film 7 using a resist pattern. (See FIG. 5), a metal layer 11 is deposited in an opening (contact hole) 10 formed by dry etching, and a metal wiring layer 12 connected to the metal layer 6 through the metal layer 11 is formed. Become.

ここで、図1〜図9に基づいて上述した薄膜抵抗体の製造方法に関する第1実施形態を説明する。はじめに、図1に示すように、半導体基板1の表面全面に公知のCVD法などで絶縁層2を形成し、この絶縁層2上にシリコンクロム(SiCr)系やニッケルクロム(NiCr)系の薄膜抵抗材料を所定形状にパターニングして、層厚が10〜20nm程度の薄膜抵抗層3を形成する。   Here, a first embodiment relating to the above-described method for manufacturing a thin film resistor will be described with reference to FIGS. First, as shown in FIG. 1, an insulating layer 2 is formed on the entire surface of a semiconductor substrate 1 by a known CVD method or the like, and a silicon chrome (SiCr) -based or nickel chrome (NiCr) -based thin film is formed on the insulating layer 2. The resistance material is patterned into a predetermined shape to form the thin film resistance layer 3 having a layer thickness of about 10 to 20 nm.

次に、図2に示すように、レジスト4を塗布してパターニングし、薄膜抵抗層3の配線接続領域に形成する金属層に対応する部分に開口5を形成する。   Next, as shown in FIG. 2, a resist 4 is applied and patterned to form an opening 5 in a portion corresponding to the metal layer formed in the wiring connection region of the thin-film resistance layer 3.

続いて、図3に示すように、公知のスパッタ法などで、モリブデン、タングステン、チタンなどの高融点金属を100〜200nmの層厚に堆積して、レジスト4上と開口5に対応する薄膜抵抗層3上とに、金属層6,6aを形成する。   Subsequently, as shown in FIG. 3, a refractory metal such as molybdenum, tungsten, or titanium is deposited to a layer thickness of 100 to 200 nm by a known sputtering method or the like, and a thin film resistor corresponding to the resist 4 and the opening 5 is deposited. Metal layers 6 and 6a are formed on the layer 3.

次いで、図4に示すように、レジスト4を剥離して、このレジスト4上の金属層6aを除去し、薄膜抵抗層3上の配線接続領域である所定位置に金属層6を形成する。   Next, as shown in FIG. 4, the resist 4 is peeled off, the metal layer 6 a on the resist 4 is removed, and the metal layer 6 is formed at a predetermined position which is a wiring connection region on the thin film resistance layer 3.

続いて、図5に示すように、金属層6及び薄膜抵抗層3を全面的に覆うように、ホウ素−リンケイ酸ガラス(BPSG)系や酸化シリコン(SiO)系の層間絶縁膜7を形成した後、レジスト8を塗布してパターニングし、層間絶縁膜7に形成する開口部(コンタクトホール)に対応する開口9を形成する。 Subsequently, as shown in FIG. 5, a boron-phosphosilicate glass (BPSG) -based or silicon oxide (SiO 2 ) -based interlayer insulating film 7 is formed so as to cover the metal layer 6 and the thin-film resistance layer 3 entirely. After that, a resist 8 is applied and patterned to form an opening 9 corresponding to an opening (contact hole) formed in the interlayer insulating film 7.

次に、図6に示すように、ドライエッチングで層間絶縁膜7に、開口9に対応する開口部(コンタクトホール)10を形成した後、レジスト8を除去する。この開口部10を形成する際のドライエッチングにおいては、金属層6で保護されるので、薄膜抵抗層3が損傷する虞はない。   Next, as shown in FIG. 6, after forming an opening (contact hole) 10 corresponding to the opening 9 in the interlayer insulating film 7 by dry etching, the resist 8 is removed. In the dry etching for forming the opening 10, since the metal layer 6 protects the thin film resistance layer 3, there is no risk of damage.

次いで、図7に示すように、公知のCVD法により全面にタングステンなどの金属を堆積し、金属層11を形成する。なお、場合によっては、この金属層11の形成に先立って、密着性をよくするための密着層としてチタンや窒化チタンの薄い層を形成することもある。   Next, as shown in FIG. 7, a metal such as tungsten is deposited on the entire surface by a known CVD method to form a metal layer 11. In some cases, a thin layer of titanium or titanium nitride may be formed as an adhesion layer for improving adhesion prior to the formation of the metal layer 11.

次に、図8に示すように、通常のドライエッチングまたはCMPなどの公知の方法で、開口部(コンタクトホール)10内にだけ残るように、層間絶縁膜7上の金属層11を除去するとともに、層間絶縁膜7及び開口部10部分に残った金属層11の各表面を平坦化する。   Next, as shown in FIG. 8, the metal layer 11 on the interlayer insulating film 7 is removed so as to remain only in the opening (contact hole) 10 by a known method such as normal dry etching or CMP. Then, the surfaces of the metal layer 11 remaining in the interlayer insulating film 7 and the opening 10 are planarized.

続いて、図9に示すように、アルミニウムなどで金属配線層12を金属層11と接続するよう形成して薄膜抵抗体とする。これによって、前記金属配線層12は、前記金属層11を介して金属層6に接続される。   Subsequently, as shown in FIG. 9, the metal wiring layer 12 is formed to be connected to the metal layer 11 with aluminum or the like to form a thin film resistor. Thereby, the metal wiring layer 12 is connected to the metal layer 6 through the metal layer 11.

このようにして製造した薄膜抵抗体は、抵抗の実効部分となる各金属層6,6間に対応する薄膜抵抗層3の長さが、上記図2に示す工程におけるレジスト4のパターニング精度で決まるので、前記長さを高精度に設定可能である。したがって、抵抗値の制御性が向上し、所望抵抗値の薄膜抵抗体を得ることができる。   In the thin film resistor manufactured as described above, the length of the thin film resistor layer 3 corresponding to the space between the metal layers 6 and 6 which are effective portions of the resistance is determined by the patterning accuracy of the resist 4 in the process shown in FIG. Therefore, the length can be set with high accuracy. Therefore, controllability of the resistance value is improved, and a thin film resistor having a desired resistance value can be obtained.

次に、本発明の製造方法に関する第2実施形態を図10〜図19に基づいて説明する。はじめに、図10に示すように、半導体基板21の表面全面に公知のCVD法などで絶縁層22を形成し、この絶縁層22上にシリコンクロム(SiCr)系やニッケルクロム(NiCr)系の薄膜抵抗材料を所定形状にパターニングして、層厚が10〜20nm程度の薄膜抵抗層23を形成する。   Next, 2nd Embodiment regarding the manufacturing method of this invention is described based on FIGS. First, as shown in FIG. 10, an insulating layer 22 is formed on the entire surface of the semiconductor substrate 21 by a known CVD method or the like, and a silicon chrome (SiCr) -based or nickel chrome (NiCr) -based thin film is formed on the insulating layer 22. The resistance material is patterned into a predetermined shape to form a thin film resistance layer 23 having a thickness of about 10 to 20 nm.

次に、図11に示すように、レジスト24を塗布してパターニングし、薄膜抵抗層23の配線接続領域に形成する金属層に対応する部分に開口25を形成する。   Next, as shown in FIG. 11, a resist 24 is applied and patterned to form an opening 25 in a portion corresponding to the metal layer formed in the wiring connection region of the thin film resistance layer 23.

続いて、図12に示すように、薄膜抵抗層23を陰極として、開口25内に、銅などの金属を100〜200nmの層厚に無電解メッキで堆積して、金属層26を形成する。   Subsequently, as shown in FIG. 12, a metal layer 26 is formed by depositing a metal such as copper in a thickness of 100 to 200 nm by electroless plating in the opening 25 using the thin film resistor layer 23 as a cathode.

次いで、図13に示すように、レジスト24を除去して、薄膜抵抗層23上の配線接続領域である所定位置に金属層26を残存させる。   Next, as shown in FIG. 13, the resist 24 is removed, and the metal layer 26 is left in a predetermined position which is a wiring connection region on the thin film resistance layer 23.

続いて、図14に示すように、薄膜抵抗層23上にこの薄膜抵抗層23の長さを決定するレジスト34を塗布してパターニングし、前記薄膜抵抗層23を所定の長さに形成する。   Subsequently, as shown in FIG. 14, a resist 34 for determining the length of the thin film resistor layer 23 is applied on the thin film resistor layer 23 and patterned, thereby forming the thin film resistor layer 23 to a predetermined length.

次いで、図15に示すように、レジスト34を除去し、ホウ素−リンケイ酸ガラス(BPSG)系や酸化シリコン(SiO)系の層間絶縁膜27を形成した後、レジスト28を塗布してパターニングし、層間絶縁膜27に形成する開口部(コンタクトホール)に対応する開口29を形成する。 Next, as shown in FIG. 15, after removing the resist 34 and forming a boron-phosphosilicate glass (BPSG) -based or silicon oxide (SiO 2 ) -based interlayer insulating film 27, a resist 28 is applied and patterned. Then, an opening 29 corresponding to an opening (contact hole) formed in the interlayer insulating film 27 is formed.

次に、図16に示すように、ドライエッチングで層間絶縁膜27に、開口29に対応する開口部(コンタクトホール)30を形成した後、レジスト28を除去する。この開口部30を形成する際のドライエッチングにおいては、金属層26で保護されるので、薄膜抵抗層23が損傷する虞はない。   Next, as shown in FIG. 16, after forming an opening (contact hole) 30 corresponding to the opening 29 in the interlayer insulating film 27 by dry etching, the resist 28 is removed. In the dry etching when forming the opening 30, the metal layer 26 protects the thin film resistance layer 23 without being damaged.

次いで、図17に示すように、公知のCVD法により全面にタングステンなどの金属を堆積し、金属層31を形成する。なお、場合によっては、この金属層31の形成に先立って、密着性をよくするための密着層としてチタンや窒化チタンの薄い層を形成することもある。   Next, as shown in FIG. 17, a metal such as tungsten is deposited on the entire surface by a known CVD method to form a metal layer 31. In some cases, a thin layer of titanium or titanium nitride may be formed as an adhesion layer for improving adhesion prior to the formation of the metal layer 31.

次に、図18に示すように、通常のドライエッチングまたはCMPなどの公知の方法で、開口部(コンタクトホール)30内にだけ残るように、層間絶縁膜27上の金属層31を除去するとともに、層間絶縁膜27及び開口部30内に残った金属層31の各表面を平坦化する。   Next, as shown in FIG. 18, the metal layer 31 on the interlayer insulating film 27 is removed so as to remain only in the opening (contact hole) 30 by a known method such as normal dry etching or CMP. Then, the surfaces of the interlayer insulating film 27 and the metal layer 31 remaining in the opening 30 are planarized.

続いて、図19に示すように、アルミニウムなどで金属配線層32を金属層31と接続するよう形成して薄膜抵抗体とする。これによって、前記金属配線層32は、前記金属層31を介して金属層26に接続される。   Subsequently, as shown in FIG. 19, a metal wiring layer 32 is formed to be connected to the metal layer 31 with aluminum or the like to form a thin film resistor. Thus, the metal wiring layer 32 is connected to the metal layer 26 through the metal layer 31.

本実施形態においても、薄膜抵抗体における抵抗の実効部分となる各金属層26,26間に対応する薄膜抵抗層23の長さが、上記図11に示す工程におけるレジスト24のパターニング精度で決まるので、前記長さを高精度に設定可能である。したがって、抵抗値の制御性が向上し、所望抵抗値の薄膜抵抗体を得ることができる。   Also in the present embodiment, the length of the thin film resistor layer 23 corresponding to the space between the metal layers 26 and 26, which is the effective portion of the resistance in the thin film resistor, is determined by the patterning accuracy of the resist 24 in the process shown in FIG. The length can be set with high accuracy. Therefore, controllability of the resistance value is improved, and a thin film resistor having a desired resistance value can be obtained.

なお、本発明は、上述した各実施形態に限定されるものではなく、例えば、薄膜抵抗層3,23は、その上面、あるいは上下面にシリコン層を有する、2層あるいは3層構造に形成してもよい。   The present invention is not limited to the above-described embodiments. For example, the thin-film resistance layers 3 and 23 are formed in a two-layer or three-layer structure having silicon layers on the upper surface or upper and lower surfaces. May be.

本発明の第1実施形態の製造方法の一工程を示す概略的な断面図。FIG. 3 is a schematic cross-sectional view showing a step of the manufacturing method according to the first embodiment of the present invention. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 本発明の第2実施形態の製造方法の一工程を示す概略的な断面図。Schematic sectional drawing which shows 1 process of the manufacturing method of 2nd Embodiment of this invention. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process. 同じく一工程を示す概略的な断面図。The schematic sectional drawing which similarly shows one process.

符号の説明Explanation of symbols

1,21 半導体基板
2,22 絶縁層
3,23 薄膜抵抗層
4,8,24,28 レジスト
5,25 開口
6,6a,26 金属層
7,27 層間絶縁膜
9,29 開口
10,30 開口部(コンタクトホール)
11,31 金属層
12,32 金属配線層
DESCRIPTION OF SYMBOLS 1,21 Semiconductor substrate 2,22 Insulating layer 3,23 Thin film resistive layer 4,8,24,28 Resist 5,25 Opening 6,6a, 26 Metal layer 7,27 Interlayer insulating film 9,29 Opening 10,30 Opening (Contact hole)
11,31 metal layer 12,32 metal wiring layer

Claims (4)

薄膜抵抗層のパターンと、前記薄膜抵抗層上に設定した配線接続領域に積層された金属層と、前記薄膜抵抗層全体を覆うように形成された層間絶縁膜と、この層間絶縁膜に形成された開口部を介して前記金属層と接続する配線層とを有する
ことを特徴とする薄膜抵抗体。
A pattern of the thin film resistance layer, a metal layer stacked in a wiring connection region set on the thin film resistance layer, an interlayer insulating film formed so as to cover the entire thin film resistance layer, and formed on the interlayer insulating film And a wiring layer connected to the metal layer through the opening.
開口部は、層間絶縁膜にレジストのパターンを用いて前記開口部に対応する開口を形成した後、ドライエッチングにより形成したものであることを特徴とする請求項1記載の薄膜抵抗体。   2. The thin film resistor according to claim 1, wherein the opening is formed by dry etching after forming an opening corresponding to the opening using a resist pattern in the interlayer insulating film. 半導体基板上に設けた絶縁層上に薄膜抵抗層のパターンを形成する工程と、レジストのパターンを用いて前記薄膜抵抗層の配線接続領域に金属層を形成する工程と、前記レジストを除去した後に前記金属層を含む薄膜抵抗層全体を覆うように層間絶縁膜を形成する工程と、前記層間絶縁膜に前記金属層に達する開口部を形成する工程と、少なくとも前記開口部を含む領域に前記金属層と接続される配線層を形成する工程とを、順次施す
ことを特徴とする薄膜抵抗体の製造方法。
Forming a thin film resistive layer pattern on an insulating layer provided on a semiconductor substrate; forming a metal layer in a wiring connection region of the thin film resistive layer using a resist pattern; and after removing the resist Forming an interlayer insulating film so as to cover the entire thin-film resistance layer including the metal layer; forming an opening reaching the metal layer in the interlayer insulating film; and at least the metal in a region including the opening And a step of forming a wiring layer connected to the layer sequentially.
開口部を形成する工程は、層間絶縁膜にレジストのパターンを用いて開口部に対応する開口を形成した後、ドライエッチングで開口に対応する開口部を形成し、次いで、レジストを除去することを特徴とする請求項1記載の薄膜抵抗体の製造方法。
The step of forming the opening includes forming an opening corresponding to the opening by using a resist pattern in the interlayer insulating film, forming an opening corresponding to the opening by dry etching, and then removing the resist. 2. The method of manufacturing a thin film resistor according to claim 1, wherein
JP2007269709A 2007-10-17 2007-10-17 Thin-film resistor, and its manufacturing method Withdrawn JP2009099755A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013038195A (en) * 2011-08-07 2013-02-21 Denso Corp Method of manufacturing semiconductor device
WO2017034555A1 (en) * 2015-08-26 2017-03-02 Intel Corporation Compound lateral resistor structures for integrated circuitry
CN111613726A (en) * 2020-06-28 2020-09-01 上海华虹宏力半导体制造有限公司 Thin film metal resistor and method for manufacturing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013038195A (en) * 2011-08-07 2013-02-21 Denso Corp Method of manufacturing semiconductor device
WO2017034555A1 (en) * 2015-08-26 2017-03-02 Intel Corporation Compound lateral resistor structures for integrated circuitry
US10340220B2 (en) 2015-08-26 2019-07-02 Intel Corporation Compound lateral resistor structures for integrated circuitry
CN111613726A (en) * 2020-06-28 2020-09-01 上海华虹宏力半导体制造有限公司 Thin film metal resistor and method for manufacturing the same

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