JPS62222674A - Manufacture of semiconductor device - Google Patents

Manufacture of semiconductor device

Info

Publication number
JPS62222674A
JPS62222674A JP25163685A JP25163685A JPS62222674A JP S62222674 A JPS62222674 A JP S62222674A JP 25163685 A JP25163685 A JP 25163685A JP 25163685 A JP25163685 A JP 25163685A JP S62222674 A JPS62222674 A JP S62222674A
Authority
JP
Japan
Prior art keywords
glass
contact hole
phosphorus glass
borophosphade
semiconductor device
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
JP25163685A
Other languages
Japanese (ja)
Inventor
Masanori Obata
正則 小畑
Reiji Tamaki
礼二 玉城
Kenji Saito
健二 斉藤
Hajime Arai
新井 肇
Hiroshi Mochizuki
望月 弘
Masaaki Ikegami
雅明 池上
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP25163685A priority Critical patent/JPS62222674A/en
Publication of JPS62222674A publication Critical patent/JPS62222674A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrodes Of Semiconductors (AREA)
  • Local Oxidation Of Silicon (AREA)

Abstract

PURPOSE:To prevent a sagging through heat treatment after the boring of a contact hole of borophosphade glass by forming the contact hole by borophosphade glass, coating the contact hole with phosphorus glass and shaping the contact hole again. CONSTITUTION:Diffusion regions 5a, 5b are shaped, borophosphade glass 6 is deposited and flattened, and a contact hole 10 is formed to the phosphide glass 6. Phosphorus glass 7 is deposited on the whole surface, phosphorus glass is etched, and a contact hole 10 is shaped again. According to such constitution, the collapse of the contact hole due to the over-sagging of borophosphade glass through heat treatment can be prevented. The borophosphade glass 6 and an aluminum wiring 9 are not brought into contact directly, thus inhibiting the precipitation of silicon in the aluminum wiring.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は2半導体装置のコンタクトホールの形成方法
に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for forming contact holes in two semiconductor devices.

〔従来の技術〕[Conventional technology]

gZA図から第2F図は従来の半導体装置の製造方法を
示す断面図であり、図において、CI)は半導体基板、
−2)は素子分離領域、(3)はゲートの絶縁膜、(4
) +2 ケ−トIIC極、(5a) i! =r 7
タクトホールを形成しないn4拡散領域、(5b) +
;!コンタクトホールを形成するr拡散領域、(6)は
ボロンリンガラス−(8)はフォトレジスト、(9)は
アルミニウム配線であるO 次6ζこの半導体i[iiの輌a方法番こついて説明す
る。、@2A図に示すように、n″′拡散領域(5a)
、 (5b)を形成後、ボロンリンガラス(6)を堆積
させ、900℃の熱処理を行うことで第2B図に示すよ
うにボロンリンカラス(6)が平担化される0そして第
2C図に示すよう番こ、フォトレジスト(8)でコンタ
クトホールのパターンを形成し、異方性ドライエツチン
クでホロンリンカラス(6)をエツチングした後。
Figures gZA to 2F are cross-sectional views showing a conventional method of manufacturing a semiconductor device, and in the figures, CI) is a semiconductor substrate,
-2) is an element isolation region, (3) is a gate insulating film, and (4) is a gate insulating film.
) +2 Kate IIC pole, (5a) i! =r 7
N4 diffusion region that does not form tact holes, (5b) +
;! The r diffusion region forming the contact hole, (6) is boron phosphorus glass, (8) is photoresist, and (9) is aluminum wiring. , @ As shown in Figure 2A, n″′ diffusion region (5a)
, After forming (5b), boron phosphorus glass (6) is deposited and heat treated at 900°C to flatten the boron phosphorus glass (6) as shown in Fig. 2B and Fig. 2C. After forming a contact hole pattern with photoresist (8) as shown in Figure 2, and etching the hole ring glass (6) with an anisotropic dry etching process.

フォトレジストを除去することで一第20図に示すよう
にコンタクトホールが形成される。そして、800℃〜
900℃の熱処理により第117:図に示すようにボロ
ンリンカラス(6)のコンタクトホールに傾斜をつけた
後、シリコンを含むアルミニウム(9)をスパッタして
バターニングを行い第2F図のようになっている。
By removing the photoresist, a contact hole is formed as shown in FIG. And 800℃~
After heat treatment at 900°C, the contact hole of the boron phosphorus glass (6) is sloped as shown in Figure 117, and then aluminum (9) containing silicon is sputtered and buttered as shown in Figure 2F. It has become.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記のような従来の半導体装置の41i造方法では。 In the conventional 41i manufacturing method of a semiconductor device as described above.

ホロンリンカラス(6)かコンタクトホール開孔後の8
00℃〜9す0℃の熱処理で垂れすぎて孔をつぶしてし
まうことと、アルミニウム配線(9)とボロンリンガラ
ス(6)と接触すると、アルミニタム配線形成後の30
0℃〜s o o ’cの熱処理でアルミニウム配線(
9)中のシリコンかコンタクトホール部に析出するトイ
ウ問題点かあった。
Holonlink glass (6) or 8 after contact hole opening
00°C to 90°C during heat treatment, it may sag too much and crush the hole, and if it comes into contact with the aluminum wiring (9) and the boron phosphorus glass (6), the 30° C.
Aluminum wiring (
9) There was a problem with silicon depositing in the contact hole area.

この・発明は、IJ)刀)る問題点を解決するためにな
されiともので、ボロンリンカラス(6)かコンタクト
ホール開孔後の熱処理によって垂れるのを抑えるととも
;こ、n;ロンリンガラス(6)とアルミニウム配線(
9)とか直接接触しない半導体装置の製1青方法を得る
ことを目的とする。
This invention was made in order to solve the problem of IJ). Glass (6) and aluminum wiring (
9) The purpose is to obtain a manufacturing method for semiconductor devices that does not require direct contact.

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

この発明に係る半導体装置の製造方法は、ボロンリンガ
ラス(6)でコンタクトボールを形成した後、ボロンリ
ンカラスの0.5〜1.0倍の膜厚のリンガラス(7)
を堆積させ再度コンタクトホールを形成したものである
The method for manufacturing a semiconductor device according to the present invention includes forming a contact ball with boron phosphorus glass (6), and then forming a contact ball with phosphorus glass (7) having a thickness of 0.5 to 1.0 times that of the boron phosphorus glass.
was deposited to form a contact hole again.

〔作 用〕[For production]

この発明に2いては、コンタクトホール開孔後ボロンリ
ンカラス(6)よりも熱処理での垂れが小さいリンガラ
ス(7)で、ボロンリンガラス(6) i zおうよう
番こしたので、 SOO〜900″Cの熱処理を行なっ
てもホロンリンカラスかコンタクトホール部に流れ込ま
ないので、コンタクトホールのっぷれを抑えられる。ま
た、リンガラス(7)でボロンリンカラス(6)を2お
うことで、アルミニウム配線(9)とボロンリンカラス
(6)が直接接触しないので、アルミニウム配線のSl
のコンタクトホールへの析出を防止できる。
In this invention, after the contact hole is opened, the boron phosphorus glass (6) is made of phosphorus glass (7) which has a smaller sag during heat treatment than the boron phosphorus glass (6), so SOO~ Even if the heat treatment is performed at 900"C, the phosphorus glass (7) will not flow into the contact hole, so the contact hole can be prevented from becoming full. Also, by covering the boron phosphorus glass (6) with the phosphorus glass (7), Since the aluminum wiring (9) and the boron glass (6) do not come into direct contact, the Sl of the aluminum wiring
Precipitation in contact holes can be prevented.

〔実施例〕〔Example〕

第1A図から第1L図はこの発明の一実施例を示す断面
図であり、(1)〜(6) 、 (8) 、 (9)は
上記従来の半導体装置の製造方法と同一のものである。
Figures 1A to 1L are cross-sectional views showing one embodiment of the present invention, and (1) to (6), (8), and (9) are the same as the conventional semiconductor device manufacturing method described above. be.

(7)はボロンリンガラス(6)を216うリンガラス
である。
(7) is a 216 phosphorus glass that is different from the boron phosphorus glass (6).

仄に、この半導体装置の製造方法について説明する。A method for manufacturing this semiconductor device will be briefly described.

ます41A図に示すように、?拡散領域(5a)。As shown in Figure 41A, ? Diffusion area (5a).

(5b)形成後、従来の0.5〜0.7倍の膜厚のホロ
ンリンカラス(6)を堆積させ%900℃の熱処理を行
なうことで第1B図1こ示すようにボロンリンガラス(
6)が平坦化される。そし−cgtc図に示すように。
After (5b) is formed, boronphosphorus glass (6) is deposited 0.5 to 0.7 times the thickness of the conventional film and heat treated at 900°C, resulting in boronphosphorus glass (6) as shown in Figure 1B.
6) is flattened. As shown in the -cgtc diagram.

フォトレジスト(8)で実際のコンタクトホールの1.
2〜1.5倍の大きさのコンタクトホールのパターンを
形成し、異方性トライエツチングでホロンリンカラス(
6)をエツチングした後、フォトレジスト(8)を除去
することで、第1D図に示すようにコンタクトホールが
形成される。そして、第1E図に示すように、常圧CV
D法によりホロンリンカラス(6)の0.5〜1.0倍
の膜厚のリンガラス(7)を堆積させると、微小コンタ
クト部ではCVDデポ時に、コンタクトホールの奥まで
反応種かはいってゆかないので第1E図に示すようにボ
ロンリンガラス(6)上に比ベコンタクトホール上では
リンカラス(7)の厚さが40幅〜50係薄くなる。そ
の後SOO〜900 ℃の熱処理を行ない、第1F図の
よう番こ平坦化する。
1. of the actual contact hole with photoresist (8).
A pattern of contact holes 2 to 1.5 times the size is formed, and holonlink holes (
After etching 6), the photoresist 8 is removed to form a contact hole as shown in FIG. 1D. Then, as shown in FIG. 1E, the normal pressure CV
When phosphorus glass (7) is deposited using the D method to a thickness of 0.5 to 1.0 times that of holon phosphorus glass (6), the reactive species reach the depths of the contact hole at the minute contact area during CVD deposition. Therefore, as shown in FIG. 1E, the thickness of the link glass (7) on the contact hole becomes 40 to 50 times thinner than that on the boron glass (6). Thereafter, heat treatment is performed at SOO to 900° C. to flatten the surface as shown in FIG. 1F.

そして第1G図に示すように、フォトレジストでコンタ
クトホールのパターンを形成し、異方性ドライエツチン
グでリンガラス(7)をエツチングした後、フォトレジ
スト(8)を除去すると、第1H図1こ示すように、コ
ンタクトホールが形成される。そして、800〜900
℃の熱処理により第1K図に示すようにリンカラス(7
)のコンタクトホールに傾斜をつけた後、アルεをスパ
ッタしてバターニングを行ないglL図のよう番こする
Then, as shown in Fig. 1G, a contact hole pattern is formed using photoresist, and after etching the ring glass (7) by anisotropic dry etching, the photoresist (8) is removed, and as shown in Fig. 1H. A contact hole is formed as shown. And 800-900
As shown in Figure 1K, link glass (7
) After forming an inclination in the contact hole, patterning is performed by sputtering Al ε, and the pattern is patterned as shown in the figure.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれは、ボロンリンガラスを
リンガラスで22うことで、熱処理によるボロンリンカ
ラスの垂れすきによるコンタクトホールのつぶれの心配
がなく、コンタクトホール開孔後の熱処理の温度範囲が
広がることと、アルミニウム配線とボロンリンカラスが
直接接触すること1Cよる。アルミニウム配線中のシリ
ンの析出が抑えられること、またリンガラス堆積後のコ
ンタクトホール部での膜厚が他の部分より薄くなるので
エツチングがしやすくなる効果がある。
As described above, the present invention has the advantage that by covering the boron phosphorus glass with phosphorus glass, there is no concern that the contact hole will collapse due to the boron phosphorus glass sagging during heat treatment, and the temperature of the heat treatment after the contact hole is opened is This is due to the expansion of the range and the direct contact between the aluminum wiring and the boron phosphorus glass. This has the effect of suppressing the precipitation of phosphorus in the aluminum wiring, and making etching easier since the film thickness at the contact hole portion after phosphorus glass is deposited is thinner than other portions.

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

第1A図からiX I L図はこの発明の一実施例を示
す断面図、第2A図から第2F図は従来の実施例を示す
断面図である。 図に2いC1(1)は半導体基板、(2)は素子分離領
域、(3)は絶縁膜、(4)はゲート亀唖、+51は1
拡散領域、(6)はボロンリンガラス、(1)はリンカ
ラス、(8)はフォトレジスト、(9)はアルξニクム
配線。 r! jiJ 、図中同一符号は同一、または相当部分
を示す。
FIGS. 1A to IX I L are sectional views showing an embodiment of the present invention, and FIGS. 2A to 2F are sectional views showing a conventional embodiment. In the figure, C1 (1) is the semiconductor substrate, (2) is the element isolation region, (3) is the insulating film, (4) is the gate shell, and +51 is the 1
Diffusion region, (6) is boron phosphorus glass, (1) is phosphorus glass, (8) is photoresist, (9) is aluminum ξ nicum wiring. r! jiJ, the same reference numerals in the figures indicate the same or corresponding parts.

Claims (3)

【特許請求の範囲】[Claims] (1)アルミ配線とゲート電極、半導体基板との絶縁膜
のコンタクトホールを、ボロンリンガラスを堆積して一
度コンタクトホールを開け、次にリンガラスを堆積させ
再度コンタクトホールを開けることで形成することを特
徴とする半導体装置の製造方法。
(1) Contact holes in the insulating film between the aluminum wiring, gate electrode, and semiconductor substrate are formed by depositing boron phosphorus glass, opening the contact hole once, then depositing phosphorous glass, and opening the contact hole again. A method for manufacturing a semiconductor device, characterized by:
(2)リンガラスの膜厚をボロンリンガラスの膜厚の0
.5〜1.0倍の膜厚であることを特徴とする特許請求
の範囲第1項記載の半導体装置の製造方法。
(2) The film thickness of phosphorus glass is 0 of the film thickness of boron phosphorus glass.
.. 2. The method of manufacturing a semiconductor device according to claim 1, wherein the film thickness is 5 to 1.0 times.
(3)リンガラスを常圧CVD法で堆積させることを特
徴とする特許請求の範囲第1項記載の半導体装置の製造
方法。
(3) A method for manufacturing a semiconductor device according to claim 1, characterized in that phosphorus glass is deposited by atmospheric pressure CVD.
JP25163685A 1985-11-08 1985-11-08 Manufacture of semiconductor device Pending JPS62222674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25163685A JPS62222674A (en) 1985-11-08 1985-11-08 Manufacture of semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25163685A JPS62222674A (en) 1985-11-08 1985-11-08 Manufacture of semiconductor device

Publications (1)

Publication Number Publication Date
JPS62222674A true JPS62222674A (en) 1987-09-30

Family

ID=17225765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25163685A Pending JPS62222674A (en) 1985-11-08 1985-11-08 Manufacture of semiconductor device

Country Status (1)

Country Link
JP (1) JPS62222674A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52104087A (en) * 1976-02-27 1977-09-01 Hitachi Ltd Preparation of inter-layer insulation film utilized in multi-layer wir ing of electronic parts
JPS60153147A (en) * 1984-01-20 1985-08-12 Nec Corp Semiconductor device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52104087A (en) * 1976-02-27 1977-09-01 Hitachi Ltd Preparation of inter-layer insulation film utilized in multi-layer wir ing of electronic parts
JPS60153147A (en) * 1984-01-20 1985-08-12 Nec Corp Semiconductor device

Similar Documents

Publication Publication Date Title
JPH04186657A (en) Manufacture of contact wiring
JPS62222674A (en) Manufacture of semiconductor device
JPS5936929A (en) Fabrication of semiconductor device
JPH02117153A (en) Method of forming semiconductor element
JPH03120828A (en) Semiconductor device and manufacture thereof
JPH0212010B2 (en)
JPS6214095B2 (en)
JPS59169152A (en) Manufacture of semiconductor device
JPH0442921A (en) Manufacture of semiconductor device
JPS62260320A (en) Manufacture of semiconductor device
JPS6149473A (en) Polycide gate MOS IC manufacturing method
JPH04208570A (en) Manufacture of semiconductor device
JPH0220043A (en) Manufacture of semiconductor device
JPS59155127A (en) Manufacture of semiconductor device
JPS61256743A (en) Manufacture of semiconductor device
JPS6188543A (en) Manufacture of semiconductor device
JPH03252137A (en) Manufacture of semiconductor device
JPS6216547A (en) Manufacture of semiconductor device
JPH01225337A (en) Manufacture of semiconductor device
JPS59126628A (en) Manufacture of semiconductor device
JPS63307721A (en) Manufacture of semiconductor device
JPS58147132A (en) Manufacture of semiconductor device
JPH01152745A (en) Manufacture of semiconductor device
JPH0231446A (en) Manufacture of semicodnuctor device
JPH02117132A (en) Manufacture of semiconductor device