JPH022654A - Electrode for mounting chip parts - Google Patents

Electrode for mounting chip parts

Info

Publication number
JPH022654A
JPH022654A JP63147444A JP14744488A JPH022654A JP H022654 A JPH022654 A JP H022654A JP 63147444 A JP63147444 A JP 63147444A JP 14744488 A JP14744488 A JP 14744488A JP H022654 A JPH022654 A JP H022654A
Authority
JP
Japan
Prior art keywords
electrode
alloy
submount
chip
gold
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
JP63147444A
Other languages
Japanese (ja)
Other versions
JPH0777245B2 (en
Inventor
Kazuhiro Sawa
沢 和弘
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14744488A priority Critical patent/JPH0777245B2/en
Publication of JPH022654A publication Critical patent/JPH022654A/en
Publication of JPH0777245B2 publication Critical patent/JPH0777245B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10WGENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W72/00Interconnections or connectors in packages
    • H10W72/50Bond wires

Landscapes

  • Led Device Packages (AREA)
  • Semiconductor Lasers (AREA)
  • Led Devices (AREA)

Abstract

PURPOSE:To provide a sub-mount of an electrode structure strong in adhesive strength to a semiconductor chip and strong in bonding strength by employing different electrode materials, one for a portion for mounting chip parts and the other for a section for connection to an external electrode. CONSTITUTION:Elements 3 to 8 formed on a surface of an insulator 2 are in electrical contact with chip parts on one ends thereof and serve as connection parts to an external terminal on the other ends thereof. Electrode materials 4-6 of said one ends are different from electrode materials 7, 8 of said the other ends. For example, SiO2 2 is formed on Si 1, and then Cr.Pt.Au 3 is formed on the same. Then, after Sn 4 is deposited, a shape inverted to the shape of the Sn 4 electrode is formed with use of a resist, and an AuSn alloy 5 and Au 6 are deposited and lifted off. Thereafter, Sn other than the remaining Au/Sn alloy 5 and the Au 6 electrode is removed by etching to form an electrode of a portion of placing the chip parts. Then Ti 7 and Au 8 are deposited and patterned to form a bonding pad electrode.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はチップ部品を搭載することのできる電極構体に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrode structure on which chip components can be mounted.

従来の技術 ファイバーを用いた光通信の光源に用いる発光ダイオー
ドや半導体レーザーにおいては、ファイバーへ効率よく
光を入射させるため、制限された領域にのみ電流を流し
て発光領域を制限している。
BACKGROUND OF THE INVENTION In light emitting diodes and semiconductor lasers used as light sources for optical communication using conventional fibers, in order to efficiently input light into the fiber, the light emitting area is limited by passing current only in a limited area.

電流を制限するとその領域での電流密度が高くなるため
発熱量が大きい。このため光通信用の発光ダイオードや
半導体レーザーでは熱伝導性の良い材料の上にチップ部
品を搭載して熱放散を向上させ同チップ部品の温度上昇
を極力防いでいる。熱伝導性の良い材料は、ダイヤモン
ドなど、絶縁物である場合が多く、この場合、チップ部
品の電極は絶縁物の表面に形成された電極を介して外部
端子と接続される。従って、熱伝導性の良い材料の表面
に電極を形成したものを搭載台(サブマウント)として
用いる。
When the current is limited, the current density in that region increases, resulting in a large amount of heat generation. For this reason, in light-emitting diodes and semiconductor lasers for optical communications, chip components are mounted on materials with good thermal conductivity to improve heat dissipation and to prevent the temperature of the chip components from rising as much as possible. The material with good thermal conductivity is often an insulator such as diamond, and in this case, the electrodes of the chip component are connected to external terminals via electrodes formed on the surface of the insulator. Therefore, a material with good thermal conductivity on which electrodes are formed is used as a mounting base (submount).

従来、この種のサブマウントは第3図に示すような構成
であった。第3図において1はシリコン(Si)、2は
酸化珪素(Sin2)、3はクロム(Cr)・白金(P
t )−金(人U)、4はスズ(Sn)、6は金(Au
)である。絶縁膜である5i022で表面と裏面とは電
気的に絶縁されている。また半導体装置を接着するため
のろう材としてSn 4を用いている。
Conventionally, this type of submount has had a configuration as shown in FIG. In Figure 3, 1 is silicon (Si), 2 is silicon oxide (Sin2), and 3 is chromium (Cr)/platinum (P).
t)-gold (person U), 4 is tin (Sn), 6 is gold (Au)
). The front surface and the back surface are electrically insulated by an insulating film 5i022. Furthermore, Sn 4 is used as a brazing material for bonding semiconductor devices.

発明が解決しようとする課題 サブマウント上に半導体レーザーを搭載する場合は搭載
部に半導体チップを設置したのち、サブマウントと同半
導体チップとを加熱し、同半導体チップの下面に形成さ
れているムU電極とサブマウント側のSn4.Au6 
 からなる電極とを融着する。次いで、半導体チップ搭
載部以外のサブマウント表面に金線をボンディング(以
後ワイヤー・ボンディングと記す)し外部端子と接続し
ていた。
Problems to be Solved by the Invention When mounting a semiconductor laser on a submount, the semiconductor chip is installed on the mounting part, and then the submount and the semiconductor chip are heated to heat the semiconductor laser formed on the bottom surface of the semiconductor chip. Sn4. on the U electrode and submount side. Au6
The electrodes are fused together. Next, a gold wire was bonded (hereinafter referred to as wire bonding) to the surface of the submount other than the semiconductor chip mounting area to connect it to an external terminal.

このような半導体チップとサブマウントとが一体化した
装置においては信頼性の点で、半導体チップとサブマウ
ントとの接着強度が強いことが必要であると同時にワイ
ヤー・ボンディングした際の金線とサブマウントとの接
着強度(以後ボンディング強度と記す)が強いことが必
要である。従来の構成のサブマウントではSn 4 、
ムu6電極が半導体チップを接着するためのろう材であ
ると共に外部端子に接続するだめワイヤー・ボンディン
グする場所(以後ボンディング・パッドと記す)の電極
でもあった。ところが半導体チップとの接着強度とボン
ディング強度とを同時に強くすることは困難であった。
In such a device where a semiconductor chip and a submount are integrated, from the point of view of reliability, it is necessary that the adhesive strength between the semiconductor chip and the submount be strong. It is necessary that the adhesive strength with the mount (hereinafter referred to as bonding strength) be strong. In the conventional configuration submount, Sn 4 ,
The mu6 electrode was a brazing material for bonding the semiconductor chip, and was also an electrode for a wire bonding location (hereinafter referred to as a bonding pad) for connection to an external terminal. However, it has been difficult to simultaneously increase the adhesive strength and bonding strength with the semiconductor chip.

Sn4を厚くすると半導体チップとの接着強度は増大し
たがボンディング強度は低下した。またSn4 を薄く
すると逆の結果になった。このように従来の構成のサブ
マウントでは半導体チップとの接着強度とボンディング
強度を同時に強くすることは困難であるという問題があ
った。
When Sn4 was made thicker, the adhesive strength with the semiconductor chip increased, but the bonding strength decreased. Furthermore, when Sn4 was made thinner, the opposite result was obtained. As described above, the submount having the conventional structure has a problem in that it is difficult to simultaneously increase the adhesive strength and the bonding strength with the semiconductor chip.

本発明はこのような間層を解決するもので半導体チップ
との接着強度が強く、かつボンディング強度も強い電極
構造のサブマウントを提供することを目的とするもので
ある。
The present invention solves such an interlayer problem and aims to provide a submount having an electrode structure that has strong adhesion strength to a semiconductor chip and strong bonding strength.

課題を解決するだめの手段 この問題点を解決するために、本発明はチン7部品の搭
載部分と外部端子への接続部分(ボンディング・パッド
)との各電極材料を別々にしたものである。詳しくは、
チップ部品搭載部分の電極にばSn、金/スズ合金(ム
u /S n合金)とAuを用い、ポンディングパッド
の電極にはチタン(Ti )とムUを用いるものである
Means for Solving the Problem In order to solve this problem, the present invention uses different electrode materials for the mounting part of the chin 7 component and the connection part (bonding pad) to the external terminal. For more information,
Sn, gold/tin alloy (mu/Sn alloy), and Au are used for the electrodes of the chip component mounting area, and titanium (Ti) and mu are used for the electrodes of the bonding pads.

作用 このようにチップ部品搭載部分のKW材料とポンディン
グパッドの電極材料とを別々にすることによシ、チップ
部品との接着強度とボンディング強度とをそれぞれに高
めることができる。
Function By using the KW material of the chip component mounting portion and the electrode material of the bonding pad separately as described above, the adhesive strength and bonding strength with the chip component can be respectively increased.

実施例 第1図は本発明の一実施例によるサブマウントの断面図
であり、第2図はチップ部品として発光タイオードを搭
載した状態のサブマウントヲ示シたものである。
Embodiment FIG. 1 is a sectional view of a submount according to an embodiment of the present invention, and FIG. 2 shows the submount with a light emitting diode mounted thereon as a chip component.

第1図、第3図において1はSi、 2は5i02.3
ば0r−Pt−ムu、 4Visn % 5はA u/
S n合金(Sn含有量12%)、6はムu、7はT1
.8は人Uである。また9はn型Ga o、6ムlo、
aAs s 10はp型GaAs11はp型Gao、8
Ano、zム5112は5i02.13は金/ベリリウ
ム合金(ムu/ B e合金)、14は0r−Pt・ム
u、15は金/ゲルマニウム合金(ムu/G e合金)
であり、9〜16で発光ダイオードを形成している。S
n4.ムu/S n合金6と人u6の部分が発光ダイオ
ードチップ搭載部分の電極であり、Tiγと人u8の部
分がポンディングパッドの1!樺である。
In Figures 1 and 3, 1 is Si, 2 is 5i02.3
B0r-Pt-mu, 4Visn % 5 is A u/
Sn alloy (Sn content 12%), 6 is mu, 7 is T1
.. 8 is person U. Also, 9 is n-type Ga o, 6 mu lo,
aAs s 10 is p-type GaAs11 is p-type Gao, 8
Ano, zmu 5112 is 5i02.13 is gold/beryllium alloy (Mu/Be alloy), 14 is 0r-Pt・mu, 15 is gold/germanium alloy (mu/G e alloy)
9 to 16 form a light emitting diode. S
n4. Mu/S n alloy 6 and person u6 are the electrodes of the light emitting diode chip mounting part, Tiγ and person u8 are the bonding pad 1! It is birch.

第1図のサブマウントは以下のようにして作製される。The submount shown in FIG. 1 is manufactured as follows.

まず、SiI上に熱酸化により厚さ10000人の5i
022を形成したのちOrを500A 、ptを1oo
oA、ムUを4000人連続蒸着してCr−Pt−Au
3を形成する。Snaを2μm蒸着後、レジストで第1
図のSn4電極の形状とは反転した形状を形成し、A 
u/S n合金(Sn含有量12%)6を1000人、
Au6を2000人蒸着する。レジストの段差を利用し
てレジスト上のムロ2人u/Sn合金およびレジストを
アセトンを用いて除去する。次いで残ったムu/Sn合
金5.ムu6電極部以外のSnを硝酸:水=1:10を
用いてエツチング除去することによシチップ部品搭載部
分の電極が形成される。その後Ti7を600人1人u
8を2μm蒸着し、フォトリングラフィ法により、ヨウ
素:ヨウ化カリウム:水=1:2:20でAuを弗酸:
水:1:10でTiをエツチング除去して、ポンディン
グパッドの電極が形成される。
First, a 10,000-thick 5i film was deposited on SiI by thermal oxidation.
After forming 022, Or is 500A and pt is 1oo
Cr-Pt-Au was produced by continuous evaporation of oA and muU by 4000 people.
form 3. After depositing Sna to a thickness of 2 μm, the first
A shape is formed that is inverted from the shape of the Sn4 electrode in the figure.
u/S n alloy (Sn content 12%) 6 for 1000 people,
Deposit Au6 by 2000 people. Using acetone, the uneven U/Sn alloy on the resist and the resist are removed using the steps of the resist. Then the remaining Mu/Sn alloy5. By etching and removing Sn other than the mu6 electrode portion using nitric acid:water=1:10, the electrode of the chip component mounting portion is formed. After that, 600 people and 1 person u of Ti7
8 was vapor-deposited to a thickness of 2 μm, and Au was mixed with hydrofluoric acid: iodine:potassium iodide:water=1:2:20 by photolithography method.
Etching and removing Ti with water:1:10 forms a bonding pad electrode.

このようにして作製されたサブマウントのチップ部品搭
載部分に発光ダイオー−チップを設置し、サブマウント
と発光ダイオ−トチ ブとを310’Qまで加熱するこ
とにより、サブマウント側のSn4 、Au/Sn合金
59合金5エ ダイオード側のCr−Pt−Au 14よりなる電極と
を融着する。まだポンディングパッドには熱と超音波を
用いてAu線をボンディングする。
A light-emitting diode chip is installed on the chip component mounting part of the submount fabricated in this way, and the submount and light-emitting diode chip are heated to 310'Q. The Sn alloy 59 alloy 5 is fused to the electrode made of Cr-Pt-Au 14 on the diode side. The Au wire is still bonded to the bonding pad using heat and ultrasonic waves.

このようにチップ部品搭載部分の電極材料とポンディン
グパッドの電極材料を別々にすることにより、チップ部
品との接着強度とワイヤーボンディング部の接着強度と
をそれぞれに高めることができる。
By using different electrode materials for the chip component mounting portion and the bonding pad in this way, it is possible to increase the adhesive strength with the chip component and the adhesive strength of the wire bonding portion, respectively.

発明の効果 以上のように本発明によれば、チップ部品との接着強度
およびワイヤー・ボンディング部の接着強度の強いサブ
マウントが得られるという効果がある。
Effects of the Invention As described above, according to the present invention, there is an effect that a submount having strong adhesive strength with chip components and strong adhesive strength at the wire bonding portion can be obtained.

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

第1図は本発明の一実施例によるサブマウントの断面図
、第2図は本発明の一実施例によるサブマウント上に発
光ダイオードを搭載した状態を示す図、第3図は従来の
サブマウントの断面図である。 1・・・・・・シリコン(Sl)、2・・・・・・酸化
珪素(Sl2)、3・・・・・・クロム・白金・金( 
Or −Pt−Au )、4。 ・・・スズ(Sn)、5・・・・・・金/スズ合金(A
u/Sn合金)、6・・・・・・金(ムU)、了・・・
・・・チタン(Ti)、8・・・金(Au )、9−=
− n型Ga□,6A4q,4As, 1 0・、・p
型(raAs. 1 1−=−p型GaO,6Ado,
2As 。 12・・・・・酸化珪素(Si02)、13・・・・・
金/ぺIJIJウム合金(ムu/Be合金)、14・・
・・・クロム・白金・金( 0r−Pt−Au )、1
5− ・金/ゲルマニウム合金(Au/Ge合金)。
FIG. 1 is a cross-sectional view of a submount according to an embodiment of the present invention, FIG. 2 is a diagram showing a state in which a light emitting diode is mounted on a submount according to an embodiment of the present invention, and FIG. 3 is a diagram showing a conventional submount. FIG. 1...Silicon (Sl), 2...Silicon oxide (Sl2), 3...Chromium, platinum, gold (
Or-Pt-Au), 4. ...Tin (Sn), 5...Gold/tin alloy (A
u/Sn alloy), 6... Gold (muU), End...
...Titanium (Ti), 8...Gold (Au), 9-=
- n-type Ga□, 6A4q, 4As, 10・,・p
type (raAs. 1 1-=-p-type GaO, 6Ado,
2As. 12...Silicon oxide (Si02), 13...
Gold/Be alloy (Mu/Be alloy), 14...
...Chromium, platinum, gold (0r-Pt-Au), 1
5- - Gold/germanium alloy (Au/Ge alloy).

Claims (2)

【特許請求の範囲】[Claims] (1)絶縁物の表面上に形成された電極が、一端部でチ
ップ部品の電極と電気的に接触すると共に、他端部で外
部端子への接続部にもなり、かつ、前記一端部の電極材
料と、前記他端部の電極材料とが異質でなることを特徴
とするチップ部品載置用電極。
(1) The electrode formed on the surface of the insulator is in electrical contact with the electrode of the chip component at one end, and also serves as a connection to an external terminal at the other end, and An electrode for mounting a chip component, characterized in that the electrode material and the electrode material of the other end are different.
(2)電極の一端部がスズ、金/スズ合金と金からなり
、同他端部がチタンと金から成ることを特徴とする請求
項1記載のチップ部品載置用電極。
(2) The electrode for mounting a chip component according to claim 1, wherein one end of the electrode is made of tin, a gold/tin alloy, and gold, and the other end is made of titanium and gold.
JP14744488A 1988-06-15 1988-06-15 Electrode for mounting chip parts Expired - Lifetime JPH0777245B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14744488A JPH0777245B2 (en) 1988-06-15 1988-06-15 Electrode for mounting chip parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14744488A JPH0777245B2 (en) 1988-06-15 1988-06-15 Electrode for mounting chip parts

Publications (2)

Publication Number Publication Date
JPH022654A true JPH022654A (en) 1990-01-08
JPH0777245B2 JPH0777245B2 (en) 1995-08-16

Family

ID=15430481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14744488A Expired - Lifetime JPH0777245B2 (en) 1988-06-15 1988-06-15 Electrode for mounting chip parts

Country Status (1)

Country Link
JP (1) JPH0777245B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5174274A (en) * 1974-12-24 1976-06-28 Fujitsu Ltd Patsukeejino seizohoho
JPS62269341A (en) * 1986-05-16 1987-11-21 Sumitomo Electric Ind Ltd Wiring substrate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5174274A (en) * 1974-12-24 1976-06-28 Fujitsu Ltd Patsukeejino seizohoho
JPS62269341A (en) * 1986-05-16 1987-11-21 Sumitomo Electric Ind Ltd Wiring substrate

Also Published As

Publication number Publication date
JPH0777245B2 (en) 1995-08-16

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