JPS622631A - Pin hole inspection method for insulative thin film - Google Patents

Pin hole inspection method for insulative thin film

Info

Publication number
JPS622631A
JPS622631A JP14164685A JP14164685A JPS622631A JP S622631 A JPS622631 A JP S622631A JP 14164685 A JP14164685 A JP 14164685A JP 14164685 A JP14164685 A JP 14164685A JP S622631 A JPS622631 A JP S622631A
Authority
JP
Japan
Prior art keywords
thin film
conductive film
pin holes
current
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14164685A
Other languages
Japanese (ja)
Inventor
Yasuhiro Nasu
安宏 那須
Satoru Kawai
悟 川井
Kenichi Oki
沖 賢一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14164685A priority Critical patent/JPS622631A/en
Publication of JPS622631A publication Critical patent/JPS622631A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To inspect pin holes continuously in real time and in nondestructive way, by detecting a current flowing out from a conductive film in a forming process of the insulative thin film on a conductive film. CONSTITUTION:A insulation thin film 4 is formed on a conductive film 3 formed on an insulator 2, by applying a capacitance type high frequency plasma CVD equipment 1 or a capacitance type sputtering equipment 1. In this process, pin holes 41 being formed on the insulative thin film 4 are detected by detecting the current I flowing out from the conductive film 3. In case pin holes 41 exist on the insulative thin film 4, positive charges move to the conductive film 3 through pin holes 41 to increase the electric potential of the film 3. If a current flows, it tells the existence of pin holes 41. In case of the large current, it can be judged that the size or the number of pin holes 41 is large.

Description

【発明の詳細な説明】 〔概要〕 容量型の高周波プラズマCVD装置または容量型のスパ
ッタ装置は、その作動中、セルフバイアスを維持するた
めに、アノード側に正電荷がカソード側に負電荷が蓄積
する。そこで、絶縁体上に形成された導電体膜上に絶縁
物薄膜を形成する場合、形成される絶i物薄膜にピンホ
ーがあると、これを介して上記の電荷が導電体膜に移動
するので、この導電体膜から導電路を用意しておけば、
これを通じて上記の電荷が外部に流出するので、この流
出電流を検出することにより、上記のピンホールの存否
を検出する絶縁物薄膜のピンホール検査方法である。
Detailed Description of the Invention [Summary] During operation, a capacitive high-frequency plasma CVD device or a capacitive sputtering device accumulates positive charges on the anode side and negative charges on the cathode side in order to maintain a self-bias. do. Therefore, when forming an insulating thin film on a conductive film formed on an insulator, if there is a pinhole in the formed insulator thin film, the above-mentioned charge will move to the conductive film through this. , if a conductive path is prepared from this conductive film,
Through this, the electric charge flows out to the outside, and this method detects the presence or absence of the pinhole by detecting this outflow current.

〔産業上の利用分野〕[Industrial application field]

本発明は絶縁物薄膜のピンホール検査方法に関する。特
に、その形成工程中にリアルタイムをもって連続的に、
かつ、非破壊的になす絶縁物薄膜のピンホール検査方法
に関する。
The present invention relates to a method for inspecting pinholes in insulating thin films. In particular, continuously in real time during the formation process,
The present invention also relates to a method for non-destructively inspecting pinholes in insulating thin films.

〔従来の技術〕[Conventional technology]

平面ディスプレイ装置等の駆動装置を構成する薄膜トラ
ンジスタ、薄膜EL素子等を製造する工程において、絶
縁体上に導電体膜を形成し、さらに、その上に絶縁物薄
膜を形成する工程がある。
2. Description of the Related Art In the process of manufacturing thin film transistors, thin film EL elements, etc. that constitute drive devices such as flat display devices, there is a step of forming a conductive film on an insulator and further forming an insulating thin film thereon.

例えば、ガラス等の透光性絶縁体上に、アクティブマト
リックス駆動用薄膜トランジスタのゲート電極等とされ
るクローム薄膜等の導電体膜を形成し、これをバターニ
ングした後、その上に、上記薄膜トランジスタのゲート
絶縁膜とされる窒化シリコン膜等の絶縁物薄膜を形成す
る工程等である。
For example, a conductive film such as a chrome thin film, which is used as the gate electrode of an active matrix driving thin film transistor, is formed on a transparent insulator such as glass, and after patterning, the thin film transistor is This is a process of forming an insulating thin film such as a silicon nitride film to be used as a gate insulating film.

か−る工程において形成された絶縁物薄膜にピンホール
があるかないかを検査するには、従来、下記の方法のい
づれかが使用されている。
Conventionally, one of the following methods has been used to inspect the presence or absence of pinholes in the insulating thin film formed in such a process.

イ、薄膜トランジスタのソース・ドレインをなす導電体
層が形成されて薄膜トランジスタが完成した後、電気的
にチェックする。
B. After the conductor layers forming the source and drain of the thin film transistor are formed and the thin film transistor is completed, it is electrically checked.

口、絶縁物薄膜形成後、その下地である導電体膜のエッ
チャントに浸し、このエッチャントをもって導電体膜の
一部を溶解してピンホールを拡大し、この拡大したピン
ホールを観察して検査する。
After forming the insulator thin film, it is immersed in an etchant for the underlying conductive film, and the etchant dissolves part of the conductive film to enlarge the pinhole, and the enlarged pinhole is observed and inspected. .

ハ、絶縁物薄膜形成後、ITO板等透光性導電体板を絶
縁物薄膜上に配置し、その間に液晶を入れ、電界を印加
して、液晶の動的散乱モードを観察する。
C. After forming the insulator thin film, a transparent conductive plate such as an ITO plate is placed on the insulator thin film, a liquid crystal is placed between them, and an electric field is applied to observe the dynamic scattering mode of the liquid crystal.

(発明が解決しようとする問題点) ところが、上記のピンホール検出方法には、。(Problem to be solved by the invention) However, the above pinhole detection method has

いづれも下記のような欠点があり、いづれの場合も満足
すべきものではなく、よりすぐれた方法の開発が望まれ
ていた。
All of them have the following drawbacks, and none of them are satisfactory, and the development of a better method has been desired.

イの方法によれば、薄膜トランジスタが完成するまで結
果が判明しない。
According to method A, the results are not known until the thin film transistor is completed.

口の方法は、破壊試験である。The oral method is destructive testing.

ハの方法は、基板を汚染するおそれがあり。Method C may contaminate the substrate.

また、絶縁物薄膜上に導電体膜が存在する構造に対して
は使用しえない。
Further, it cannot be used for a structure in which a conductive film is present on an insulating thin film.

本発明の目的は、上記の要請に応えて、絶縁体上に形成
された導電体膜上に絶縁物薄膜を形成する工程中に、リ
アルタイムをもって連続的に、かつ、非破壊的になすこ
とができる絶縁物薄膜のピンホール検査方法を提供する
ことにある。
In response to the above-mentioned needs, an object of the present invention is to continuously and non-destructively form an insulating thin film in real time on a conductive film formed on an insulating material. An object of the present invention is to provide a method for inspecting pinholes in insulating thin films that can be performed.

〔問題点を解決するための手段〕[Means for solving problems]

上記の目的を達成するために本発明が採った手段は、容
量型の高周波プラズマCVD装Mlまたは容量型のスパ
ッタ装置1を使用して、絶縁体2上に形成された導電体
WIS上に絶縁物薄8!I4を形成する工程中に、前記
の導電体fi3から流出する電流工を検出して、前記の
絶縁物薄膜4に形成されつつあるピンホール41を検出
するものである。
The means taken by the present invention to achieve the above object is to use a capacitive high-frequency plasma CVD device Ml or a capacitive sputtering device 1 to insulate the conductor WIS formed on the insulator 2. Thin 8! During the step of forming I4, the current flowing out from the conductor fi3 is detected to detect the pinhole 41 that is being formed in the insulator thin film 4.

〔作用〕[Effect]

容量型の高周波プラズマCVD装置lまたは容量型のス
パッタ装filを使用して、絶縁体2上に形成された導
電体膜3上に絶縁物薄膜4を形成する場合、形成される
絶縁物薄膜上に正電荷が蓄積する。そして、もし絶縁物
薄膜4にピンホール41があるときは、上記の正電荷は
ピンホール41を介して導電体膜3に移動してこの電位
を上昇させる。そこで、導電体[3から流出する電流I
を検出しうる手段16を設けておき、上記の工程中にこ
の電流を検出し、もし、電流が存在すれば、何らかのピ
ンホール41が存在し、特にその電流が大きいときはピ
ンホール41の大きさや数が大きいと判定しうる0本発
明はこの原理を利用したものである。
When an insulator thin film 4 is formed on a conductive film 3 formed on an insulator 2 using a capacitive high-frequency plasma CVD device or a capacitive sputtering device, Positive charge accumulates in . If there is a pinhole 41 in the insulator thin film 4, the above-mentioned positive charge moves to the conductor film 3 through the pinhole 41 and increases this potential. Therefore, the current I flowing out from the conductor [3
A means 16 capable of detecting the current is provided, and this current is detected during the above process. If the current is present, some kind of pinhole 41 exists, and when the current is particularly large, the size of the pinhole 41 is determined. The present invention utilizes this principle.

〔実施例〕〔Example〕

以下、図面を参照しつ覧、本発明の一実施例に係る絶縁
物薄膜のピンホール検査方法についてさらに説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for inspecting pinholes in an insulating thin film according to an embodiment of the present invention will be further described below with reference to the drawings.

第1図参照 図において、■は容量型の高周波プラズマCVD装置ま
たは容量型のスパッタ装置である。 12は7ノードで
あり、その上に導電体I8!3が形成されている絶縁体
2が取り付けられている。7ノード12は容量型の高周
波プラズマCVD装置lまたは容量型のスパッタ装置1
の外壁11を介して接地される。13はカソードであり
、外壁11からは絶縁されている。15はラジオ周波数
の交流電源であり、その一端はコンデンサ14を介して
カソード13と接続され、その他端は外壁11と接続さ
れて、接地されている。16は電流検出手段であり、1
7は電流制限抵抗であり、その直列回路の一端は導電体
M3と接続され、他端はラジオ周波数電源15の一端と
接続されて接地されている。
In the drawings shown in FIG. 1, ``■'' indicates a capacitive high-frequency plasma CVD apparatus or a capacitive sputtering apparatus. Reference numeral 12 indicates 7 nodes, and an insulator 2 on which a conductor I8!3 is formed is attached. 7 Node 12 is a capacitive high frequency plasma CVD device 1 or a capacitive sputtering device 1
It is grounded through the outer wall 11 of. 13 is a cathode, which is insulated from the outer wall 11. Reference numeral 15 denotes a radio frequency AC power source, one end of which is connected to the cathode 13 via a capacitor 14, and the other end connected to the outer wall 11 and grounded. 16 is a current detection means;
7 is a current limiting resistor, one end of which is connected to the conductor M3 in series circuit, and the other end is connected to one end of the radio frequency power source 15 and grounded.

アノード12とカソード13との間にラジオ周波数の交
流電圧が印加されると、SiHとN H3とがプラズマ
化して、導電体膜3上に窒化シリコンが堆積して絶縁物
薄li5が成長する。
When a radio frequency AC voltage is applied between the anode 12 and the cathode 13, SiH and NH3 are turned into plasma, silicon nitride is deposited on the conductor film 3, and a thin insulator li5 is grown.

このとき、セルフバイアスを維持するため7ノード12
側には正電荷がカソード13側には負電荷が蓄積される
。そして、もし、導電体膜3上に堆積する窒化シリコン
よりなる絶縁物薄膜5にピンホール41が存在している
と、上記の正電荷はこのピンホール41を介して導電体
膜3に移動するので、これは直ちに電流検出手段1Bと
電流制限抵抗17を介してラジオ周波数電源15め一端
または接地に流出する。そこで、電流検出手段1Bの電
流■を検出する。電流制限抵抗17が使用される理由は
、大きな電流がピンホール41に流れて、これを拡大す
ることを防止するためである。
At this time, to maintain self-bias, 7 nodes 12
Positive charges are accumulated on the cathode 13 side, and negative charges are accumulated on the cathode 13 side. If a pinhole 41 exists in the insulator thin film 5 made of silicon nitride deposited on the conductor film 3, the above-mentioned positive charge moves to the conductor film 3 through this pinhole 41. Therefore, this immediately flows out through the current detecting means 1B and the current limiting resistor 17 to one end of the radio frequency power supply 15 or to ground. Therefore, the current ■ of the current detection means 1B is detected. The reason why the current limiting resistor 17 is used is to prevent a large current from flowing into the pinhole 41 and enlarging it.

〔発明の効果〕〔Effect of the invention〕

以上説明せるとおり、本発明においては、容量型の高周
波プラズマCVD装置または容量型のスパッタ装置を使
用して、絶縁体上に形成された導電体膜上に絶縁物薄膜
を形成する工程中に、前記の導電体膜から流出する電流
を検出して、前記の絶縁物薄膜に形成されつつあるピン
ホールを検出することとされているので、絶縁物薄膜の
形成工程の如何なる時点においても、リアルタイムに、
連続的に、かつ、非破壊的に、絶縁物薄膜のピンホール
を検査することができる。
As explained above, in the present invention, during the process of forming an insulating thin film on a conductive film formed on an insulator using a capacitive high-frequency plasma CVD device or a capacitive sputtering device, Since pinholes that are forming in the insulator thin film are detected by detecting the current flowing from the conductor film, it is possible to detect pinholes that are forming in the insulator thin film in real time at any point in the process of forming the insulator thin film. ,
Pinholes in insulator thin films can be inspected continuously and non-destructively.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、本発明の一実施例に係る絶縁物薄膜のピンホ
ール検査方法を説明する図である。 1参〇〇容量型の高周波プラズマCVD装置または容量
型のスパッタ装置、 11・・拳外壁、12目−7ノー
ド、 13  ・・拳カソード、14・・・コンデンサ
、  15・・Φラジオ周波数の交流電源、 16・・
・電流検出手段、 17−・・電流制限抵抗、 2・・
・絶縁体、 3・・・導電体膜、 4・・・絶縁物薄膜
、  工 ・ ・ ・電流。 本発明 第1図
FIG. 1 is a diagram illustrating a method for inspecting pinholes in an insulating thin film according to an embodiment of the present invention. 1. Capacitive high-frequency plasma CVD device or capacitive sputtering device, 11... fist outer wall, 12 nodes - 7 nodes, 13... fist cathode, 14... capacitor, 15... Φ radio frequency alternating current. Power supply, 16...
-Current detection means, 17-...Current limiting resistor, 2...
・Insulator, 3...Conductor film, 4...Insulator thin film, Engineering...Current. Figure 1 of the present invention

Claims (1)

【特許請求の範囲】 容量型の高周波プラズマCVD装置(1)または容量型
のスパッタ装置(1)を使用して、絶縁体(2)上に形
成された導電体膜(3)上に絶縁物薄膜(4)を形成す
る工程中に、 前記導電体膜(3)から流出する電流(I)を検出して
、前記絶縁物薄膜(4)に形成されつつあるピンホール
(41)を検出してなす絶縁物薄膜のピンホール検査方
法。
[Claims] Using a capacitive high-frequency plasma CVD device (1) or a capacitive sputtering device (1), an insulator is formed on a conductive film (3) formed on an insulator (2). During the step of forming the thin film (4), a current (I) flowing out from the conductive film (3) is detected to detect a pinhole (41) that is being formed in the insulating thin film (4). Pinhole inspection method for thin insulating films.
JP14164685A 1985-06-28 1985-06-28 Pin hole inspection method for insulative thin film Pending JPS622631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14164685A JPS622631A (en) 1985-06-28 1985-06-28 Pin hole inspection method for insulative thin film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14164685A JPS622631A (en) 1985-06-28 1985-06-28 Pin hole inspection method for insulative thin film

Publications (1)

Publication Number Publication Date
JPS622631A true JPS622631A (en) 1987-01-08

Family

ID=15296883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14164685A Pending JPS622631A (en) 1985-06-28 1985-06-28 Pin hole inspection method for insulative thin film

Country Status (1)

Country Link
JP (1) JPS622631A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6220254B1 (en) 1997-11-14 2001-04-24 L'oreal Packaging and applicator device comprising a receptacle, an ergonomic applicator, and a wiper member
US7866327B1 (en) 1999-05-19 2011-01-11 L'oreal Device for packaging and applying a cosmetic, in particular for making up the lips
KR20120115116A (en) 2011-04-08 2012-10-17 신에쓰 가가꾸 고교 가부시끼가이샤 Method for producing cathode active material for nonaqueous electrolyte secondary battery, cathode material for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6220254B1 (en) 1997-11-14 2001-04-24 L'oreal Packaging and applicator device comprising a receptacle, an ergonomic applicator, and a wiper member
US7866327B1 (en) 1999-05-19 2011-01-11 L'oreal Device for packaging and applying a cosmetic, in particular for making up the lips
KR20120115116A (en) 2011-04-08 2012-10-17 신에쓰 가가꾸 고교 가부시끼가이샤 Method for producing cathode active material for nonaqueous electrolyte secondary battery, cathode material for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery

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