JPS61201477A - Pattern for fet chip - Google Patents

Pattern for fet chip

Info

Publication number
JPS61201477A
JPS61201477A JP4394785A JP4394785A JPS61201477A JP S61201477 A JPS61201477 A JP S61201477A JP 4394785 A JP4394785 A JP 4394785A JP 4394785 A JP4394785 A JP 4394785A JP S61201477 A JPS61201477 A JP S61201477A
Authority
JP
Japan
Prior art keywords
thick plating
plating layers
electrode
gate electrode
drain electrode
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.)
Granted
Application number
JP4394785A
Other languages
Japanese (ja)
Other versions
JPH0362019B2 (en
Inventor
Manabu Watase
渡瀬 学
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 JP4394785A priority Critical patent/JPS61201477A/en
Publication of JPS61201477A publication Critical patent/JPS61201477A/en
Publication of JPH0362019B2 publication Critical patent/JPH0362019B2/ja
Granted legal-status Critical Current

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  • Wire Bonding (AREA)
  • Junction Field-Effect Transistors (AREA)

Abstract

PURPOSE:To increase adhesive strength by forming thick plating layers on bumps shaped to pad sections for a drain electrode and a gate electrode at arbitrary positions, where the thick plating layers are not brought into contact with gold ribbons bonded with a thick plating layer on a source electrode, in a division and contraction manner. CONSTITUTION:Divided thick plating layers 6 having the same shape are formed at desired positions on a source electrode 3 and pad sections for a drain electrode 4 and a gate electrode 5. The width of the divided thick plating layers 6 on the drain electrode 4 and the gate electrode 5 is made the same as the thick plating layers 6 on the source electrodes 3, and length can be set arbitrarily up to positions where the thick plating layers are not brought into contact with gold ribbons 7 bonded with the thick plating layers 6 on the source electrode 3 from pad ends. Accordingly, when a FET chip is bonded with the gold ribbons 7 in a turning-upside-down manner, the thick plating layers 6 on the drain electrode 4 and the gate electrode 5 are buried properly into the gold ribbons 7 in the same manner as the upper section of the source electrode 3 because the thick plating layers 6 are divided and contracted, thus improving adhesive strength.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、倒置形でボンディングされるFETチップ
に係り、特にボンディング強度の向上をはかったFET
チップパターンに関するものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an FET chip that is bonded in an inverted configuration, and in particular to an FET chip that is bonded in an inverted manner.
It concerns the chip pattern.

〔従来の技術〕[Conventional technology]

第3図(a)〜(d)は従来のFETチップパターンの
概略構成を示す図であり、第3図(a)は上面図、第3
1W (b) 〜(d)は第3図(a)のA−All。
3(a) to 3(d) are diagrams showing the schematic structure of a conventional FET chip pattern, and FIG. 3(a) is a top view;
1W (b) to (d) are A-All in FIG. 3(a).

B−B@およびC−C線による断面側面図をそれぞれ示
す。なお、以下の説明では半導体基板として砒化ガリウ
ム(GaAs)を用いたショットキ障壁ゲート構造Ga
As電界効果トランジスタ(以下GaAa  MES 
 FET )のチップパターンを例にとり説明を行う。
Sectional side views taken along lines B-B@ and C-C are shown, respectively. Note that in the following explanation, a Schottky barrier gate structure Ga using gallium arsenide (GaAs) as a semiconductor substrate is used.
As field effect transistor (hereinafter referred to as GaAa MES)
An explanation will be given using the chip pattern of a FET as an example.

この従来例では、半絶縁性GaAs基板11ゴ気相エピ
タキシヤル成長法等で形成されたチャネル層な形成する
メサfiGaAa半導体層120表面にソース電極13
およびドレイン電極14の各オーミック電極とショット
キバリ7ゲート電也15とが形成され、各電極13〜1
5の所望の部分にボンディング導体として厚メッキ層1
6が選択的に形成されている。このよ5なFETチップ
に対しFETパツクージとのボンディングのため中間導
体として第4図C&)〜(d)に示すように、金リボン
17′%:農面から熱圧着することにより、ソース、ド
レインおよびゲートの各電極13.14゜15上の厚メ
ッキ層16に同時に接着する必要があるが、従来例のF
ETチップの構造では、ドレイン電極14およびグー)
111億15上の厚メッキ層16は電極バッド嘱全域に
亘り一体化した形状からなり、ソース電極13上の個々
の浮メッキ層16に比べかなり大きなものとなっていた
In this conventional example, a source electrode 13 is formed on the surface of a mesa fiGaAa semiconductor layer 120, which is a channel layer formed by vapor phase epitaxial growth or the like on a semi-insulating GaAs substrate 11.
Then, each ohmic electrode of the drain electrode 14 and a Schottky 7 gate electrode 15 are formed, and each of the electrodes 13 to 1 is formed.
thick plating layer 1 as a bonding conductor on the desired part of 5
6 is selectively formed. As shown in Fig. 4C &) to (d), gold ribbon 17'% is used as an intermediate conductor for bonding with the FET package for such a FET chip. It is necessary to simultaneously adhere to the thick plating layer 16 on each electrode 13, 14° 15 of the gate.
In the structure of the ET chip, the drain electrode 14 and the goo)
The thick plating layer 16 on the electrode pad 115 had an integrated shape over the entire electrode pad area, and was considerably larger than the individual floating plating layers 16 on the source electrode 13.

このため同じ熱圧着条件の下で、ドレイン電極14およ
びゲート電極&=4=PI S上の淳メッキ層16に対
する金リボン1Tの接着強度は、ソース電極13上に比
べ小さくなっており素子信頼性の低下の要因となってい
た。また接着強度向上のため熱圧着荷重および時間を増
大するとFETチップにクラックや割れを生じたり、ソ
ース電極13ト亀&15が短絡する等の歩留り低下の問
題を生じていた。
Therefore, under the same thermocompression bonding conditions, the adhesion strength of the gold ribbon 1T to the Jun plating layer 16 on the drain electrode 14 and gate electrode &=4=PIS is smaller than that on the source electrode 13, and the device reliability is reduced. This was a factor in the decline in Furthermore, when the thermocompression bonding load and time are increased in order to improve adhesive strength, problems such as cracks and cracks occur in the FET chip and short circuit between the source electrodes 13 and 15 occur, resulting in a decrease in yield.

この発明は、上記のような問題点を解消するためになさ
れたもので、金リボンに対する厚メッキ層の接着強度が
ドレイン11L他およびゲート亀惚上においてもソース
電極上と同様となるように改善しf、−F ETチップ
パターンを得ることを目的とする。
This invention was made to solve the above-mentioned problems, and improves the adhesive strength of the thick plating layer to the gold ribbon so that it is the same on the drain 11L and other gate electrodes as on the source electrode. The purpose is to obtain a f,-FET chip pattern.

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

この発明に係る倒置形でボンディングされるFETチッ
プパターンは、ドレイン[極およびゲート電極のパッド
部上の所望の位置にバンプ状厚メッキ層を同一形状で分
割して形成したものである。
The FET chip pattern to be bonded upside down according to the present invention is formed by dividing a bump-like thick plating layer into identical shapes at desired positions on the pad portions of the drain electrode and gate electrode.

〔作用〕[Effect]

この発明においては、倒置形でボンディングされるFE
Tチップにおいて、ドレイン電極およびグー)ME電極
上金リボンに対するボンディング導体としての厚メッキ
層が分割、縮小化されることからボンディング強度の改
善を図ることができる。
In this invention, the FE bonded in an inverted form
In the T-chip, the thick plating layer as a bonding conductor for the gold ribbon on the drain electrode and ME electrode is divided and reduced in size, so that the bonding strength can be improved.

〔実施例〕〔Example〕

、第1図(a)〜(d)はこの発明の一実施例の構成を
示すFETチップパターンの概略図であり、第1図(a
)はその上面図、第1図(b)〜(d)は各破断線A−
A線、B−B?@およびC−C葱による断面側面図であ
る。半絶縁性GaAa基板1上に気相エピタキシャル成
長法等で形成されたチャネル層↓ を形成するメサff1GaAs半導体20表面に金、グ
ルマニクムなどによるソース電極3およびドレイン電極
4の各オーミック電極とフルミニクム等によるショット
キバリ7グート篭極5とが選択的に形成された後、ソー
ス電極3上並びにドレイン電極4.ゲート電極5のパッ
ド部上の所望の位置に、電解メッキ法等により分割され
た同一形状の厚メッキ層6が形成されている。この実施
例では、ドレイン電極4およびゲート電極5上の分割さ
れた厚メツキ層60幅はソース電極3上の厚メッキ層6
と同一で、長さはパット°端から第2図に示すようなソ
ース電極3上の厚メッキ層6にボンディングされる金リ
ボンTと接触しない位置まで任意に設定できる。このよ
うな構成にするこ、とによって、第2図(a) 〜(d
) K示すように、FETチップを倒置形で金リボンT
にボンディングする場合、ドレイン電極4およびゲート
電極5上の厚メッキ層6は分割、縮小化されていること
からソース電極3上と同様に、金リボンTの中へ適度に
埋没するため接着強度の改善が図られる。
, FIGS. 1(a) to 1(d) are schematic diagrams of FET chip patterns showing the configuration of an embodiment of the present invention, and FIG.
) is its top view, and FIGS. 1(b) to (d) are each broken line A-
A line, B-B? It is a cross-sectional side view taken by @ and C-C green onion. A channel layer ↓ is formed on a semi-insulating GaAa substrate 1 by vapor phase epitaxial growth or the like.On the surface of the GaAs semiconductor 20, there are ohmic electrodes such as a source electrode 3 and a drain electrode 4 made of gold, glumanicum, etc., and a Schottky electrode made of fluminicum, etc. After selectively forming the burrs 7 and the gutter electrode 5, the burrs 7 and the drain electrode 4 are formed on the source electrode 3 and the drain electrode 4. A thick plating layer 6 having the same shape is formed at a desired position on the pad portion of the gate electrode 5 by electrolytic plating or the like. In this embodiment, the width of the divided thick plating layer 60 on the drain electrode 4 and gate electrode 5 is the same as that of the thick plating layer 60 on the source electrode 3.
The length can be arbitrarily set from the end of the pad to a position where it does not come into contact with the gold ribbon T bonded to the thick plating layer 6 on the source electrode 3 as shown in FIG. By having such a configuration, FIGS. 2(a) to (d)
) As shown in K, place the FET chip upside down and attach it to the gold ribbon T.
When bonding to the gold ribbon T, since the thick plating layer 6 on the drain electrode 4 and gate electrode 5 is divided and reduced in size, it is appropriately buried in the gold ribbon T as on the source electrode 3, so that the adhesive strength is reduced. Improvements will be made.

なお、上記実施例では、ショットキしくり7ゲート構造
のGaAsFETチップパターンについて述べたが、こ
の発明はこれに限らず接合形などのその他の構造、また
GaAs以外の半導体を用いたFETチップパターンに
も適用できる。
In the above embodiment, a GaAs FET chip pattern with a Schottky seven-gate structure was described, but the present invention is not limited to this, and can also be applied to other structures such as a junction type, and to FET chip patterns using semiconductors other than GaAs. Applicable.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したとおり、倒置形でボンディング
されるFETチップにおいて、ドレイン電極およびゲー
ト電極のパッド部に形成されるバンプ上の厚メッキWl
が、ソース電極上の厚メッキ層にボンディングされる金
リボンと接触しない任意の位置に分割、縮小化されて形
成されているので、FETパッケージとの中間導体とし
ての金リボンに厚メッキ層が適度に埋没し接着強度の改
善が図られる。また厚メッキ層の側面部が接着に利用で
きることから、厚メッキJ−の分割、縮小化による接触
抵抗の増大が防止できるという利点がある。
As explained above, in an FET chip that is bonded in an inverted configuration, the thick plating Wl on the bumps formed on the pad portions of the drain electrode and the gate electrode is provided.
is divided and reduced in size at arbitrary positions that do not make contact with the gold ribbon that is bonded to the thick plating layer on the source electrode, so the thick plating layer is appropriately formed on the gold ribbon that serves as an intermediate conductor with the FET package. The adhesive strength is improved by being embedded in the adhesive. Furthermore, since the side surface of the thick plating layer can be used for adhesion, there is an advantage that an increase in contact resistance due to division or downsizing of the thick plating J- can be prevented.

4、図面の(資)率なa8A 第1図(a) 〜(d) 、第2図(a)〜(d)はこ
の発明の一実施例を示すGaAsFETチップパターン
および金リボンボンディング時の概略構成を示す図で、
各(IL)図は上面図、各(b)〜(d)は各破断線A
−A線、B−B線、C−C線による断面側面図、第3図
(&) 〜(d) 、第4図(a) 〜(d)は従来の
GaAsFETチップパターンおよび金リボンボンディ
ング時の概略構成を示す図で、各(a)〜(d)は第1
図、第2図の各(a)〜(d)と同様な上面図および断
面側面図である。
4. Figures 1 (a) to (d) and 2 (a) to (d) are schematic diagrams of GaAsFET chip patterns and gold ribbon bonding, showing an embodiment of the present invention. In the diagram showing the configuration,
Each (IL) figure is a top view, each (b) to (d) is each broken line A
- Cross-sectional side views taken along lines A, B-B, and C-C, Figures 3 (&) to (d) and Figures 4 (a) to (d) show the conventional GaAsFET chip pattern and gold ribbon bonding. In this figure, each of (a) to (d) is the first
FIG. 3 is a top view and a cross-sectional side view similar to each of (a) to (d) of FIG.

図において、1は半絶縁性GhAs基板、2はメサ型G
aAs+半導体層、3はソース電極、4はドレイン電極
、5はゲート電極、6は厚メッキ膚、7は金リボンであ
る。
In the figure, 1 is a semi-insulating GhAs substrate, 2 is a mesa type G
In the aAs+ semiconductor layer, 3 is a source electrode, 4 is a drain electrode, 5 is a gate electrode, 6 is a thick plating layer, and 7 is a gold ribbon.

なお、各図中の同一符号は同一または相当部分を示す。Note that the same reference numerals in each figure indicate the same or corresponding parts.

代理人 大岩 増車 (外2名ン 第1図 6:4メツモ1 第2図 第3図 第4図Agent: Oiwa, additional vehicles (2 others) Figure 1 6:4 Metsumo 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] アイランド状のソース電極およびドレイン電極とゲート
電極のパッド部の所望の位置に形成されたバンプ状の厚
メッキ層を介して倒置形でボンディングされるFETチ
ップにおいて、前記ドレイン電極およびゲート電極のパ
ッド部上の所望の位置にバンプ状の厚メッキ層を同一形
状に複数に分割して形成したことを特徴とするFETチ
ップパターン。
In an FET chip that is bonded in an inverted form through a bump-shaped thick plating layer formed at desired positions of the island-shaped source and drain electrodes and the pad part of the gate electrode, the pad part of the drain electrode and the gate electrode is An FET chip pattern characterized in that a bump-like thick plating layer is formed at a desired position on the top by dividing it into a plurality of parts having the same shape.
JP4394785A 1985-03-04 1985-03-04 Pattern for fet chip Granted JPS61201477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4394785A JPS61201477A (en) 1985-03-04 1985-03-04 Pattern for fet chip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4394785A JPS61201477A (en) 1985-03-04 1985-03-04 Pattern for fet chip

Publications (2)

Publication Number Publication Date
JPS61201477A true JPS61201477A (en) 1986-09-06
JPH0362019B2 JPH0362019B2 (en) 1991-09-24

Family

ID=12677899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4394785A Granted JPS61201477A (en) 1985-03-04 1985-03-04 Pattern for fet chip

Country Status (1)

Country Link
JP (1) JPS61201477A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759493A1 (en) * 1997-02-12 1998-08-14 Motorola Semiconducteurs SEMICONDUCTOR POWER DEVICE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6465268B2 (en) 1997-05-22 2002-10-15 Semiconductor Energy Laboratory Co., Ltd. Method of manufacturing an electro-optical device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759493A1 (en) * 1997-02-12 1998-08-14 Motorola Semiconducteurs SEMICONDUCTOR POWER DEVICE
EP0859414A1 (en) * 1997-02-12 1998-08-19 Motorola Semiconducteurs S.A. Semiconductor power device

Also Published As

Publication number Publication date
JPH0362019B2 (en) 1991-09-24

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