JPH04139860A - Semiconductor device - Google Patents

Semiconductor device

Info

Publication number
JPH04139860A
JPH04139860A JP26361590A JP26361590A JPH04139860A JP H04139860 A JPH04139860 A JP H04139860A JP 26361590 A JP26361590 A JP 26361590A JP 26361590 A JP26361590 A JP 26361590A JP H04139860 A JPH04139860 A JP H04139860A
Authority
JP
Japan
Prior art keywords
film
interlayer
wiring
plating
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
JP26361590A
Other languages
Japanese (ja)
Inventor
Akemi Oguchi
小口 あけみ
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson 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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP26361590A priority Critical patent/JPH04139860A/en
Publication of JPH04139860A publication Critical patent/JPH04139860A/en
Pending legal-status Critical Current

Links

Landscapes

  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)

Abstract

PURPOSE:To improve the adhesion of Au, which is a wiring material, to an interlayer film and to minimize the interlayer capacity by a method wherein the interlayer film, which isolates an upper layer wiring from a lower layer wiring, is formed into a two-layer structure consisting of a nitride film and an oxide film. CONSTITUTION:The structure of an interlayer film, which isolates an upper layer wiring 112 from a lower layer wiring 106, is formed into a two-layer structure consisting of a nitride film 107 and an oxide film 108. That is, the film 107 is first formed as an interlayer insulating film and moreover, the film 108 is formed thereon to form into the two-layer structure, whereby the adhesion of Au, which is a wiring material, to the interlayer film is improved and moreover, an interlayer capacity can be suppressed to the lowest limit. Thereby, a highly reliable wiring layer can be formed.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、半導体装置の層間膜構造に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an interlayer film structure of a semiconductor device.

[従来の技術] 従来の半導体装置は、上層配線と下層配線を絶縁する層
間膜が酸化膜の一層構造であるため、配線材料であるA
uとの密着性が悪かった。
[Prior Art] In conventional semiconductor devices, the interlayer film that insulates the upper layer wiring and the lower layer wiring has a single layer structure of an oxide film, so that the wiring material A
The adhesion with u was poor.

この事を従来の工程を追って説明すると、まずSi基板
(301)上にメッキ用の第一の電極膜として、窒化チ
タン(TiN)(302)とチタン(Ti)(303)
と白金(Pt)(304)を形成し、第一のフォトレジ
スト(305)により、前記第一の電極膜上に所望のパ
ターンを形成する。続いて、前記第一の電極膜を用いて
メッキを行い、前記第一のフォトレジストが存在しない
部分に第一のメッキ(Au)膜(306)を形成し、前
記第一のフォトレジストを除去する。さらに、前記第一
のメッキ(Au)膜をマスクとして、前記第一の電極膜
をエツチングする。
To explain this step by step through the conventional process, first, titanium nitride (TiN) (302) and titanium (Ti) (303) are deposited on a Si substrate (301) as a first electrode film for plating.
and platinum (Pt) (304) are formed, and a desired pattern is formed on the first electrode film using a first photoresist (305). Subsequently, plating is performed using the first electrode film, a first plating (Au) film (306) is formed in the area where the first photoresist does not exist, and the first photoresist is removed. do. Furthermore, the first electrode film is etched using the first plating (Au) film as a mask.

次に、層間絶縁膜として酸化膜(SiO2)(307)
を形成し、フォトエッチによって、前記第一のメッキ膜
上にホール部を設ける。
Next, an oxide film (SiO2) (307) is used as an interlayer insulating film.
A hole portion is provided on the first plating film by photo-etching.

続いて、前記酸化膜上に、メッキ用の第二の電極膜とし
て、白金(Pt)(309)/チタン(T 1)(30
8)を形成する。さらに、前記第二の電極膜上に、所望
のパターンをもった第二のフォトレジスト(310)を
形成し、前記第二の電極膜を用いてメッキを行い、前記
第二のフォトレジストが存在しない部分に、第二のメッ
キ(Au)膜(311)を形成する。
Subsequently, platinum (Pt) (309)/titanium (T1) (30
8). Furthermore, a second photoresist (310) having a desired pattern is formed on the second electrode film, plating is performed using the second electrode film, and the second photoresist (310) is formed on the second electrode film. A second plating (Au) film (311) is formed on the parts that are not covered.

最後に、前記第二のフォトレジストを除去し、前記第二
のメッキ膜をマスクとして、前記第二の電極膜をエツチ
ングする。
Finally, the second photoresist is removed, and the second electrode film is etched using the second plating film as a mask.

以上が従来の工程である。The above is the conventional process.

「発明が解決しようとする課題及び目的]しかし、前述
の従来技術では、上層配線と下層配線を絶縁する層間膜
が酸化膜−層のため、配線材料であるA、 uと酸化膜
との密着性が悪いという課題があった。しかし、密着性
の良い窒化膜を用いると、層間容量が非常に大きくなっ
てしまうという問題もあった。
[Problems and objects to be solved by the invention] However, in the above-mentioned conventional technology, since the interlayer film that insulates the upper layer wiring and the lower layer wiring is an oxide film layer, there is a problem in the close contact between the wiring materials A and U and the oxide film. However, when a nitride film with good adhesion is used, there is also the problem that the interlayer capacitance becomes extremely large.

そこで、本発明はこのような課題点を解決するもので、
その目的とするところは、層間膜を形成する際、該層間
膜を窒化膜(S13N4)と酸化膜(SiC2)の二層
構造にすることによって、配線材料であるAuと層間膜
との密着性を向上させ、さらには、層間容量を最低限に
押さえることのできる、より信頼性の高い配線層を形成
することにある。
Therefore, the present invention is intended to solve these problems.
The purpose of this is to improve the adhesion between Au, which is the wiring material, and the interlayer film by forming the interlayer film into a two-layer structure consisting of a nitride film (S13N4) and an oxide film (SiC2). The object of the present invention is to form a more reliable wiring layer that can improve the interlayer capacitance and minimize the interlayer capacitance.

[課題を解決するための手段] 本発明の半導体装置は メッキ法を用いて形成した複数の配線層を有する半導体
装置に於て、上層配線と下層配線を絶縁する層間膜の構
造が、窒化膜と酸化膜の二層構造であることを特徴とす
る。
[Means for Solving the Problems] A semiconductor device of the present invention has a plurality of wiring layers formed using a plating method. It is characterized by a two-layer structure consisting of an oxide film and an oxide film.

[作用] 本発明の上記の構成によれば、層間膜を形成する際、該
層間膜を窒化膜と酸化膜の二層構造にすることによって
、配線材料であるAuと層間膜との密着性を向上させ、
さらには、層間容量を最低限に押さえることのできる、
より信頼性の高い半導体装置を構成できる。
[Function] According to the above structure of the present invention, when forming the interlayer film, by forming the interlayer film into a two-layer structure of a nitride film and an oxide film, the adhesion between Au, which is the wiring material, and the interlayer film is improved. improve the
Furthermore, the interlayer capacitance can be kept to a minimum,
A more reliable semiconductor device can be constructed.

[実施例] 本発明の半導体装置は、第1図に示される構造をしてい
る。
[Example] A semiconductor device of the present invention has a structure shown in FIG.

101はSi基板、102は窒化チタン(TiN)、1
03はチタン(Ti)、104は白金(pt)、106
は金(Au)、107は窒化膜(Si3N4)、108
は酸化膜(SiC2)、109ばチタン(Ti)、11
0は白金(pt)、112は金(Au)である。
101 is a Si substrate, 102 is titanium nitride (TiN), 1
03 is titanium (Ti), 104 is platinum (pt), 106
is gold (Au), 107 is a nitride film (Si3N4), 108
is an oxide film (SiC2), 109 is titanium (Ti), 11
0 is platinum (pt) and 112 is gold (Au).

以下詳細は図を追いながら説明していく。The details will be explained below with reference to the figures.

(第2図(a)〜(1)) まず、Si基板(201)の表面全体にメッキ用の第一
の電極膜として、窒化チタン(TiN)(202)を形
成し、さらにチタン(Ti)(150人)(203)、
白金(Pt)(1000人)(204,)を形成する。
(Fig. 2 (a) to (1)) First, titanium nitride (TiN) (202) is formed on the entire surface of the Si substrate (201) as a first electrode film for plating, and then titanium (TiN) (202) is formed on the entire surface of the Si substrate (201). (150 people) (203),
Form platinum (Pt) (1000 people) (204,).

(第2図(a))次いで、第一のフォトレジスト(20
5)により、前記第一の電極膜上に、所望のパターンを
形成する。(第2図(b))さらに、前記第一の電極膜
を電極として、メッキ液温度60℃の条件下で金メッキ
を行い、前記第一のフォトレジストが存在しない部分に
、膜厚(5000人)のメッキ(Au)膜(206)を
形成する。(第2図(c)続いて、前記第一のフォトレ
ジストを除去して(第2図(d))、前記第一のメッキ
(Au)膜をマスクとして、前記第一の電極膜をエツチ
ングする。(第2図(e)) 次に、層間絶縁膜として、まず、窒化膜(207)を形
成しさらにその上層に酸化膜(208)を形成する。(
第2図(f))この際、まず、窒化膜の形成方法として
は、5iHaガス600sct2m、NH3ガヌ640
0sccmの混合ガスにより、圧力2500mtorr
、温度350℃の条件下で、Si3N4膜を500人形
成する。次に、酸化膜の形成方法としては、TE01 
(SL (OC2H@)4)を用いて、プラズマ中で8
102膜を5000人形成する。
(FIG. 2(a)) Next, the first photoresist (20
5), a desired pattern is formed on the first electrode film. (Fig. 2 (b)) Furthermore, using the first electrode film as an electrode, gold plating was performed at a plating solution temperature of 60°C, and the film thickness (5000 ) A plating (Au) film (206) is formed. (FIG. 2(c)) Next, the first photoresist is removed (FIG. 2(d)), and the first electrode film is etched using the first plating (Au) film as a mask. (FIG. 2(e)) Next, as an interlayer insulating film, first a nitride film (207) is formed, and then an oxide film (208) is formed on top of it. (
(Fig. 2(f)) At this time, first, the nitride film was formed using 600 sct2 m of 5iHa gas and 640 m of NH3 gas.
Pressure 2500mtorr with 0sccm mixed gas
, 500 people formed Si3N4 films at a temperature of 350°C. Next, as a method for forming an oxide film, TE01
8 in plasma using (SL (OC2H@)4)
5,000 people will form 102 films.

こうして形成された層間絶縁膜に、フォトエッチによっ
て、前記第一のメッキ膜上にホール部を設ける。
A hole portion is formed on the first plating film in the interlayer insulating film thus formed by photo-etching.

続いて、前記層間膜上に第二の電極膜として、白金(P
t)(210)/−F−タ:/ (Ti)(209)を
形成する。(第2図(h))このときTi(150人)
、Pt (1000人)とする。さらに、前記第二の電
極膜上に、所望のパターンをもった第二のフォトレジス
ト(211)を形成しく第2図(i))、前記第二の電
極膜を用いてメッキを行い、前記第二のフォトレジスト
が存在しない部分に、第二のメッキ(Au)膜(212
)を形成する。(第2図(j)) 最後に、前記第二のフォトレジストを除去しく第2図(
k))、前記第二のメッキ膜をマスクとして、前記第二
の電極膜をエツチングする。(第2図(1)) こうしてできあがった本発明半導体装置は、従来の半導
体装置に比べると、上層配線と下層配線を絶縁する層間
膜を、窒化膜と酸化膜の二層構造にした為、配線材料で
あるAuと層間膜との密着性が向」二し、さらには、層
間容量を最低限に押さえることができる。
Subsequently, platinum (P) was applied as a second electrode film on the interlayer film.
t) (210)/-F-ta:/ (Ti) (209) is formed. (Figure 2 (h)) At this time, Ti (150 people)
, Pt (1000 people). Furthermore, a second photoresist (211) having a desired pattern is formed on the second electrode film (FIG. 2(i)), plating is performed using the second electrode film, and the second photoresist (211) is plated using the second electrode film. A second plating (Au) film (212
) to form. (Figure 2 (j)) Finally, remove the second photoresist (Figure 2 (j)).
k)) Etching the second electrode film using the second plating film as a mask. (Fig. 2 (1)) The semiconductor device of the present invention thus completed is different from conventional semiconductor devices because the interlayer film that insulates the upper layer wiring and the lower layer wiring has a two-layer structure of a nitride film and an oxide film. The adhesion between Au, which is the wiring material, and the interlayer film is improved, and furthermore, the interlayer capacitance can be kept to a minimum.

[発明の効果コ 以上述べた本発明によれば、従来の構造に比べて、配線
材料であるAuと層間膜との密着性が向上し、さらには
、層間容量を最低限に押さえることのできる、より信頼
性の優れた半導体装置を提供できる。
[Effects of the Invention] According to the present invention described above, the adhesion between Au, which is the wiring material, and the interlayer film is improved compared to the conventional structure, and furthermore, the interlayer capacitance can be kept to a minimum. , it is possible to provide a semiconductor device with higher reliability.

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

第1図は、本発明の半導体装置を示す主要断面図。 第2図(a)〜(1)は、本発明の半導体装置の製造工
程の断面図。 第3図は、従来の半導体装置を示す断面図。 101、201. 102、 202. 103、203. 104、204、 ]、05、205. 106、206. 107、207 108、208、 ↑ 09、209. 110、210. 111、211. 112、212. 30 ]、 ・ 302 ・ 303 ・ 304 ・ 305  ・ 306 ・ 307 ・ 308 ・ 309  ・ 310 ・ 311 ・ ・Si基板 ・窒化チタン(TiN) チタン(Ti) ・白金(Pt) ・・レジスト ・メッキ(Au) ・窒化膜(Si3N4) ・酸化膜(SiC2) ・・チタン(T1) ・白金(Pt) レジスト ・メッキ(Au)
FIG. 1 is a main sectional view showing a semiconductor device of the present invention. FIGS. 2(a) to 2(1) are cross-sectional views of the manufacturing process of the semiconductor device of the present invention. FIG. 3 is a sectional view showing a conventional semiconductor device. 101, 201. 102, 202. 103, 203. 104, 204, ], 05, 205. 106, 206. 107, 207 108, 208, ↑ 09, 209. 110, 210. 111, 211. 112, 212. 30 ], ・ 302 ・ 303 ・ 304 ・ 305 ・ 306 ・ 307 ・ 308 ・ 309 ・ 310 ・ 311 ・ ・Si substrate・Titanium nitride (TiN) Titanium (Ti) ・Platinum (Pt) ・・Resist plating (Au)・Nitride film (Si3N4) ・Oxide film (SiC2) ・・Titanium (T1) ・Platinum (Pt) Resist plating (Au)

Claims (1)

【特許請求の範囲】[Claims]  メッキ法を用いて形成した複数の配線層を有する半導
体装置に於て、上層配線と下層配線を絶縁する層間膜の
構造が、窒化膜と酸化膜の二層構造であることを特徴と
する半導体装置。
A semiconductor device having a plurality of wiring layers formed using a plating method, characterized in that the structure of an interlayer film insulating upper layer wiring and lower layer wiring is a two-layer structure of a nitride film and an oxide film. Device.
JP26361590A 1990-10-01 1990-10-01 Semiconductor device Pending JPH04139860A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26361590A JPH04139860A (en) 1990-10-01 1990-10-01 Semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26361590A JPH04139860A (en) 1990-10-01 1990-10-01 Semiconductor device

Publications (1)

Publication Number Publication Date
JPH04139860A true JPH04139860A (en) 1992-05-13

Family

ID=17391998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26361590A Pending JPH04139860A (en) 1990-10-01 1990-10-01 Semiconductor device

Country Status (1)

Country Link
JP (1) JPH04139860A (en)

Similar Documents

Publication Publication Date Title
JPS61208241A (en) Manufacture of semiconductor device
JPH04139860A (en) Semiconductor device
JPH0485829A (en) Semiconductor device and manufacture thereof
JP2738682B2 (en) Wiring formation method
JPS613431A (en) Semiconductor device with multilayer interconnection and manufacture thereof
JPS62155537A (en) Manufacture of semiconductor device
JP2529448B2 (en) Metal projection forming substrate and method of forming metal projection
JP2768949B2 (en) Semiconductor device and method of manufacturing the same
JPS6334928A (en) Formation of through hole
JPH0287521A (en) Formation of electrode of semiconductor device
JPS5932153A (en) Manufacture of semiconductor device
JPS62118539A (en) Formation of multilayer interconnection
JPH043962A (en) Semiconductor device and its manufacture
JPH0685068A (en) Manufacture of semiconductor device
JPS63219141A (en) Formation of multilayer interconnection of semiconductor element
JPS6193629A (en) Manufacture of semiconductor device
JPH03205829A (en) Manufacture of semiconductor device
JPH03248533A (en) Semiconductor integrated circuit device
JPS6173350A (en) Manufacture of semiconductor device
JPH01109749A (en) Formation of wiring
JPS596560A (en) Manufacture of semiconductor device
JPH023926A (en) Forming method of wiring
JPH04102321A (en) Manufacture of semiconductor device
JPH0222844A (en) Semiconductor integrated circuit
JPH04196465A (en) Production of semiconductor device