JP2834593B2 - Lead frame material for bare bonding - Google Patents
Lead frame material for bare bondingInfo
- Publication number
- JP2834593B2 JP2834593B2 JP3080706A JP8070691A JP2834593B2 JP 2834593 B2 JP2834593 B2 JP 2834593B2 JP 3080706 A JP3080706 A JP 3080706A JP 8070691 A JP8070691 A JP 8070691A JP 2834593 B2 JP2834593 B2 JP 2834593B2
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- lead frame
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L24/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
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- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/321—Disposition
- H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/32245—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
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- H01L2224/45117—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 400°C and less than 950°C
- H01L2224/45124—Aluminium (Al) as principal constituent
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45144—Gold (Au) as principal constituent
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- H01L2224/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
- H01L2224/838—Bonding techniques
- H01L2224/83801—Soldering or alloying
- H01L2224/83805—Soldering or alloying involving forming a eutectic alloy at the bonding interface
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- H01L2924/0001—Technical content checked by a classifier
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- H01L2924/102—Material of the semiconductor or solid state bodies
- H01L2924/1025—Semiconducting materials
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- H01L2924/151—Die mounting substrate
- H01L2924/156—Material
- H01L2924/157—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2924/15738—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950 C and less than 1550 C
- H01L2924/15747—Copper [Cu] as principal constituent
Landscapes
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- Power Engineering (AREA)
- Wire Bonding (AREA)
- Die Bonding (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はベアボンディング用リー
ドフレーム材料に係り、さらに詳しくはＡｕ−Ｓｉの共
晶合金法を利用してベアボンディングを行なっても半導
体素子へのリードフレーム材料の成分元素による悪影響
の無い銅系リードフレーム材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead frame material for bare bonding, and more particularly, to a component element of a lead frame material for a semiconductor device even when bare bonding is performed using a eutectic alloy method of Au-Si. The present invention relates to a copper-based lead frame material that does not have an adverse effect due to the above.
【０００２】[0002]
【従来の技術】半導体の組立工程は、素子（半導体チッ
プ）とリードフレームを接合するダイボンディング工
程、素子の配線とリードフレームをＡｕやＡｌのワイヤ
で接続するワイヤボンディング工程および樹脂で封止す
る工程よりなる。これらの工程においてリードフレーム
は加熱されるため、使用されるリードフレーム材料はこ
れらの加熱によっても軟化しないこと、即ち耐熱性が要
求される。2. Description of the Related Art Semiconductor assembling processes include a die bonding process of bonding an element (semiconductor chip) and a lead frame, a wire bonding process of connecting an element wiring and a lead frame with Au or Al wires, and sealing with a resin. Process. Since the lead frame is heated in these steps, the lead frame material used is required not to be softened by the heating, that is, to have heat resistance.
【０００３】一方、熱伝導性や電気伝導性に優れる銅合
金はトランジスタ等、良好な熱放散性が要求される用途
を中心にリードフレーム材料として使用されている。On the other hand, copper alloys having excellent heat conductivity and electric conductivity are used as lead frame materials mainly for applications requiring good heat dissipation such as transistors.
【０００４】これらの銅系リードフレーム材料は、耐熱
性や機械的強度、半田付け性など、リードフレーム材料
として要求される特性を満足させるために、各種添加元
素を含有した銅合金となっている。[0004] These copper-based lead frame materials are copper alloys containing various additive elements in order to satisfy characteristics required as lead frame materials such as heat resistance, mechanical strength, and solderability. .
【０００５】上記組立工程の内、ダイボンディング工程
では、通常三種類の方法により素子とリードフレームが
接合されている。即ち、Ａｕ−Ｓｉ共晶合金法、半田接
着法、導電性樹脂接着法である。これらの方法の内、Ａ
ｕ−Ｓｉ共晶合金法は、３７０℃の共晶温度より５０〜
７０℃高い４２０〜４４０℃の温度に素子およびリード
フレームを数十秒間加熱することにより接合を行うもの
である。In the die bonding step of the above assembling steps, the element and the lead frame are usually joined by three types of methods. That is, an Au-Si eutectic alloy method, a solder bonding method, and a conductive resin bonding method. Of these methods, A
In the u-Si eutectic alloy method, the eutectic temperature of 370 ° C.
The bonding is performed by heating the element and the lead frame to a temperature of 420 to 440 ° C., which is 70 ° C. higher, for several tens of seconds.
【０００６】ところで、半導体装置におけるコストダウ
ンの要求は強く、その一つの手段として、従来行ってい
たリードフレームへのめっきを省略してダイボンディン
グやワイヤボンディングを行うベアボンディングと称す
る技術がトランジスタを中心に広まりつつある。Meanwhile, there is a strong demand for cost reduction in semiconductor devices, and as one of the means, a technique called bare bonding, in which plating on a lead frame is omitted and die bonding or wire bonding is performed, is mainly used for transistors. Is spreading.
【０００７】しかるに、各種添加元素を含有した従来の
合金よりなるリードフレームにつき前記のＡｕ−Ｓｉ共
晶合金法によりベアボンディングを行ったところ、半導
体素子の特性に変化をきたすことが判明した。However, when bare bonding was performed on a lead frame made of a conventional alloy containing various additive elements by the above-described Au-Si eutectic alloy method, it was found that the characteristics of the semiconductor element were changed.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、Ａｕ−Ｓｉ
共晶合金法を用いてベアボンディングを行っても、半導
体素子の特性に変化をきたすことがなく、かつ、耐熱性
や機械的強度にも優れたベアボンディング用リードフレ
ーム材料を提供することを目的とする。SUMMARY OF THE INVENTION The present invention relates to Au-Si
The purpose of the present invention is to provide a bare bonding lead frame material which does not change the characteristics of a semiconductor element even when performing bare bonding using a eutectic alloy method, and has excellent heat resistance and mechanical strength. And
【０００９】[0009]
【課題を解決するための手段】本発明のベアボンディン
グ用リードフレーム材料は、Ｎｉ：０．４〜１．０ｗｔ
％（０．４ｗｔ％は含まず）、Ｓｉ：０．０１〜０．２
５ｗｔ％、Ｚｎ：０．０５〜１．０ｗｔ％を含有し、Ｉ
ＩＩｂ族の元素を総量で０．０１ｗｔ％以下、Ｖｂ族の
元素を総量で０．０１ｗｔ％以下に制限し、残部実質的
にＣｕよりなることを特徴とする。According to the present invention, a lead frame material for bare bonding according to the present invention comprises Ni: 0. 4 to 1.0 wt
% (Excluding 0.4 wt%), Si: 0.01 to 0.2
5 wt%, Zn: 0.05-1.0 wt%,
The group IIb element is limited to 0.01 wt% or less in total, the Vb group element is limited to 0.01 wt% or less, and the balance is substantially composed of Cu.
【００１０】本発明に係るベアボンディング用リードフ
レーム材料の第２の特徴とするところは、Ｎｉ：０．１
〜１．０ｗｔ％、Ｓｉ：０．０１〜０．２５ｗｔ％、Ｚ
ｎ：０．０５〜１．０ｗｔ％、Ｍｎ：０．０１〜０．０
５ｗｔ％、Ｍｇ：０．００１〜０．０１ｗｔ％、Ｃｒ，
Ｔｉ，Ｚｒの内から選ばれる１種または２種以上を０．
００１〜０．０１ｗｔ％を含有し、ＩＩＩｂ族の元素を
総量で０．０１ｗｔ％以下、Ｖｂ族の元素を総量で０．
０１ｗｔ％以下に制限し、残部実質的にＣｕよりなるこ
とを特徴とするベアボンディング用リードフレーム材料
に存在する。The second feature of the lead frame material for bare bonding according to the present invention is that Ni: 0.1
To 1.0 wt%, Si: 0.01 to 0.25 wt%, Z
n: 0.05 to 1.0 wt%, Mn: 0.01 to 0.0
5 wt%, Mg: 0.001 to 0.01 wt%, Cr,
One or two or more selected from Ti and Zr may be used in the amount of 0.1.
001-0.01 wt%, group IIIb elements in a total amount of 0.01 wt% or less, and group Vb group elements in a total amount of 0.1 wt%.
It is limited to 01 wt% or less, and the remainder substantially consists of Cu.
【００１１】[0011]
【作用】以下に、本発明の作用を本発明をなすに際して
得た知見及び成分の限定理由とともに説明する。The function of the present invention will be described below together with the knowledge obtained when the present invention is carried out and the reasons for limiting the components.
【００１２】本発明者は、従来合金について、Ａｕ−Ｓ
ｉ共晶合金法を用いてベアボンディングを行った場合に
半導体素子の特性に変化をきたす原因の解明をまず行っ
た。The present inventor has reported that Au-S
First, the cause of the change in the characteristics of the semiconductor element when bare bonding was performed using the i-eutectic alloy method was clarified.
【００１３】その結果、次のことが判明した。すなわ
ち、４２０〜４４０℃に数十秒間加熱される間に溶融し
たＡｕ−Ｓｉ層に接した銅合金リードフレーム中の成分
元素はＡｕ−Ｓｉ層を通過し、半導体素子中に拡散す
る。As a result, the following has been found. That is, the component elements in the copper alloy lead frame that are in contact with the Au-Si layer melted while being heated to 420 to 440 ° C for several tens of seconds pass through the Au-Si layer and diffuse into the semiconductor element.
【００１４】半導体素子中に拡散する元素の中でも、周
期表のＩＩＩｂ族に属するＢ，Ａｌ，Ｇａ，ＩｎやＶｂ
族に属するＮ，Ｐ，Ａｓ，ＳｂなどはＳｉ半導体に対し
アクセプターおよびドナーとして作用しそれぞれＰ型お
よびＮ型半導体を形成する。トランジスタの場合、一般
にリードフレームと接合されるＳｉ素子の底面部はコレ
クターになっており、この部分に前記のＩＩＩｂ族ある
いはＶｂ族に属する元素がリードフレームから侵入し、
不純物半導体を形成し、トランジスタの電気的特性に悪
影響を及ぼすものであることを見い出した。すなわち、
従来の銅合金は、耐熱性、機械的強度を高めるために各
種添加元素を含有せしめていたが、この添加元素や不純
物が、Ａｕ−Ｓｉ共晶合金法を用いたベアボンディング
を行った場合には、半導体素子の電気的特性を悪化させ
る原因となっていたわけである。Among the elements that diffuse into the semiconductor element, B, Al, Ga, In and Vb belonging to group IIIb of the periodic table
N, P, As, Sb, and the like belonging to the group act as an acceptor and a donor for the Si semiconductor to form a P-type and N-type semiconductor, respectively. In the case of a transistor, the bottom portion of a Si element generally joined to a lead frame is a collector, and the element belonging to the group IIIb or Vb enters the portion from the lead frame,
It has been found that an impurity semiconductor is formed, which adversely affects the electrical characteristics of the transistor. That is,
Conventional copper alloys contain various additional elements in order to increase heat resistance and mechanical strength, but when these additional elements and impurities are bare bonded using the Au-Si eutectic alloy method, This is a cause of deteriorating the electrical characteristics of the semiconductor element.
【００１５】本発明はかかる知見に基づいてなされたも
のである。The present invention has been made based on such findings.
【００１６】まず本発明に係るベアボンディング用リー
ドフレーム材料の含有成分および成分の割合について説
明する。 （Ｎｉ）Ｎｉは次に説明するＳｉとともに強度および耐
熱性の向上に寄与する元素である。ＮｉとＳｉは金属間
化合物を形成することにより強度および耐熱性を向上さ
せる。First, the components contained in the lead frame material for bare bonding according to the present invention and the proportions of the components will be described. (Ni) Ni is an element that contributes to improvement in strength and heat resistance together with Si described below. Ni and Si improve strength and heat resistance by forming an intermetallic compound.
【００１７】Ｎｉの含有量が０．１ｗｔ％未満ではその
効果が少なく、また１．０ｗｔ％を超えて含有されると
強度や耐熱性は向上するものの導電率が低下する。よっ
てＮｉ含有量は０．１〜１．０ｗｔ％とする。ただし、
請求項１においては、０．４〜１．０ｗｔ％（０．４ｗ
ｔは含まず）についてのみ権利を請求する。ＳｉもＮｉ
とともに強度および耐熱性を向上させる元素である。Ｓ
ｉ含有量が０．０１ｗｔ％未満ではその効果は少なく、
また０．２５ｗｔ％を超えて含有されると強度や耐熱性
は向上するものの導電率が低下する。よってＳｉ含有量
は０．０１〜０．２５ｗｔ％とする。If the Ni content is less than 0.1 wt%, the effect is small. If the Ni content exceeds 1.0 wt%, the strength and heat resistance are improved, but the electrical conductivity is lowered. Therefore, the Ni content is set to 0.1 to 1.0 wt%. However,
In claim 1, 0.4 to 1.0 wt% (0.4 w
t is not included). Si is also Ni
Also, it is an element that improves strength and heat resistance. S
If the i content is less than 0.01 wt%, the effect is small,
If the content exceeds 0.25 wt%, the strength and heat resistance are improved, but the electrical conductivity is reduced. Therefore, the Si content is set to 0.01 to 0.25 wt%.
【００１８】ＮｉとＳｉは金属間化合物を形成すること
により強度や耐熱性の向上に寄与することから、Ｎｉと
Ｓｉの含有量の比率はＮｉ／Ｓｉ＝４〜７であることが
望ましい。また、ＮｉとＳｉの金属間化合物を均一微細
に析出させるための溶体化処理、冷間加工および時効処
理を含む製造工程を経ることによりその性能が発揮され
る。 （Ｚｎ）Ｚｎは半田の耐剥離性を向上させる元素であ
り、含有量が０．０５ｗｔ％未満ではその効果は少な
く、また１．０ｗｔ％を超えて含有されてもその効果は
飽和する一方、導電率が低下する。よってＺｎ含有量は
０．０５〜１．０ｗｔ％とする。 （Ｍｎ）Ｍｎは熱間加工性を向上させる元素であり、含
有量が０．０１ｗｔ％未満ではその効果は少なく、また
０．０５ｗｔ％を超えて含有されると造塊時の湯流れ性
が悪化して造塊歩留りが低下する。よってＭｎ含有量は
０．０１〜０．０５ｗｔ％とする。 （Ｍｇ）Ｍｇは不可避的に混入してくるＳを安定したＭ
ｇとの化合物の形で母相中に固定させて熱間加工を可能
にするための必須の元素であり、含有量が０．００１ｗ
ｔ％未満ではＳは、ＭｇＳという安定した化合物の形と
はならず、Ｓは単体あるいはＭｎＳの形で存在し、その
結果、ＳあるいはＭｎＳは熱間圧延の加熱時または熱間
圧延中に粒界に移動して割れを生じさせるようになる。Since Ni and Si contribute to the improvement of strength and heat resistance by forming an intermetallic compound, the ratio of the contents of Ni and Si is preferably Ni / Si = 4-7. In addition, its performance is exhibited through a manufacturing process including a solution treatment, a cold working, and an aging treatment for uniformly and finely depositing an intermetallic compound of Ni and Si. (Zn) Zn is an element that improves the peeling resistance of the solder. Its effect is small when its content is less than 0.05 wt%, and its effect is saturated even when it is contained in excess of 1.0 wt%, The conductivity decreases. Therefore, the Zn content is set to 0.05 to 1.0 wt%. (Mn) Mn is an element that improves hot workability, and its effect is small when its content is less than 0.01 wt%, and when it is contained in excess of 0.05 wt%, the flowability of the molten metal at the time of agglomeration becomes poor. It deteriorates and the lumping yield decreases. Therefore, the Mn content is set to 0.01 to 0.05 wt%. (Mg) Mg is stable M
g is an essential element for enabling hot working by being fixed in the matrix in the form of a compound having a content of 0.001 wg.
At less than t%, S does not take the form of a stable compound called MgS, and S exists alone or in the form of MnS. As a result, S or MnS is granulated during heating during hot rolling or during hot rolling. Move to the world and cause cracks.
【００１９】また、０．０１ｗｔ％を超える含有量では
鋳塊中にＣｕ＋ＭｇＣｕ2の共晶（融点７２２℃）を生
じ、７２２℃以上の温度に加熱すると割れを発生し、溶
湯が酸化し、湯流れ性が悪化し、鋳塊を不健全とし、造
塊歩留りが低下する。よってＭｇ含有量は０．００１〜
０．０１ｗｔ％とする。（Ｃｒ，Ｔｉ，Ｚｒ）Ｃｒ，Ｔ
ｉ，Ｚｒはいずれの元素も熱間加工性を向上させる元素
であり、含有量が０．００１ｗｔ％未満はこの効果は少
なく、また、０．０１ｗｔ％を超える含有量では造塊時
の湯流れ性が悪化し、造塊歩留りが低下する。よって、
Ｃｒ，Ｔｉ，Ｚｒの含有量は０．００１〜０．０１ｗｔ
％とする。また、Ｃｒ，Ｔｉ，Ｚｒの２種以上を含有す
る場合でも上記に説明した同じ理由から合計含有量は
０．００１〜０．０１ｗｔ％とする。（ＩＩＩｂ族、Ｖ
ｂ族元素）一方、ＩＩＩｂ族、Ｖｂ族に属するＢ，Ａ
ｌ，Ｇａ，Ｉｎ，Ｎ，Ｐ，Ａｓ，Ｓｂなどの元素は不純
物として原料に含まれており、製造された銅合金中に侵
入して来る。以上の説明から明らかなように、これらの
不純物の含有量は少ない方が良く、使用される半導体に
よっても異なるが、いずれの元素も総量で０．０１ｗｔ
％以下とする。０．０１ｗｔ％以下とすれば、Ａｕ−Ｓ
ｉ共晶合金法によりベアボンディングを行ったとしても
半導体素子への拡散はほとんど防止することができる。If the content exceeds 0.01 wt%, a eutectic of Cu + MgCu 2 (melting point: 722 ° C.) is generated in the ingot, and when heated to a temperature of 722 ° C. or higher, cracks are generated, and the molten metal is oxidized, The flowability deteriorates, the ingot becomes unhealthy, and the ingot yield decreases. Therefore, the Mg content is 0.001 to
0.01 wt%. (Cr, Ti, Zr) Cr, T
i and Zr are elements that improve hot workability, and if the content is less than 0.001% by weight, the effect is small. Properties are deteriorated, and the yield of lumps is reduced. Therefore,
The content of Cr, Ti, Zr is 0.001-0.01 wt.
%. Even when two or more types of Cr, Ti, and Zr are contained, the total content is set to 0.001 to 0.01 wt% for the same reason described above. (IIIb group, V
Group B) On the other hand, B, A belonging to Group IIIb and Group Vb
Elements such as l, Ga, In, N, P, As, and Sb are contained in the raw material as impurities, and penetrate into the manufactured copper alloy. As is clear from the above description, the content of these impurities is preferably as small as possible and varies depending on the semiconductor used.
% Or less. If the content is 0.01 wt% or less, Au-S
Even if bare bonding is performed by the i-eutectic alloy method, diffusion to a semiconductor element can be almost prevented.
【００２０】これらの元素が不純物として合金中に侵入
するのを防ぐためには、例えば次の手段を講ずればよ
い。使用する原料中の不純物の含有量を規制する。これ
らの元素を含む合金を溶解した後には十分に炉洗いを行
い、炉材に付着したこれらの元素を除去してから溶解す
る。また、るつぼもこれら元素を含まない材料からなる
ものを選ぶ。In order to prevent these elements from entering the alloy as impurities, for example, the following measures may be taken. Regulate the content of impurities in the raw materials used. After dissolving the alloy containing these elements, the furnace is sufficiently washed to remove these elements adhering to the furnace material and then melted. Also, a crucible made of a material not containing these elements is selected.
【００２１】以上説明したように、本発明では、銅合金
において組成比を所定の割合にするとともに、ＩＩＩｂ
族、Ｖｂ族の元素の含有量を制限することにより、Ａｕ
−Ｓｉ共晶合金法によるベアボンディングという用途の
適性の拡大を行うことができる。As described above, in the present invention, the composition ratio of the copper alloy is set to a predetermined ratio, and
By limiting the content of elements of group Vb and group Vb, Au
-The suitability for bare bonding by the Si eutectic alloy method can be expanded.
【００２２】[0022]
【実施例】本発明に係るベアボンディング用リードフレ
ーム材料を実施例により説明する。EXAMPLES A lead frame material for bare bonding according to the present invention will be described with reference to examples.
【００２３】表１に示す含有成分および含有の割合の合
金をクリプトル炉を使用し、木炭被覆下において大気中
で溶解し、鋳鉄製ブックモールドを用いて４５ｍｍｔ×
８０ｍｍｗ×２００ｍｍｌの鋳塊を鋳造した後、この鋳
塊の表裏面を２．５ｍｍずつ面削後８７０℃の温度で１
５ｍｍｔまで熱間圧延し、７００℃以上の温度から３０
℃／秒の速度で水冷した。The alloys having the contents and proportions shown in Table 1 were melted in the air using a kryptor furnace under a charcoal coating, and 45 mmt × using a book mold made of cast iron.
After casting an ingot of 80 mmw x 200 mml, the front and back surfaces of the ingot were beveled 2.5 mm at a time and then at a temperature of 870 ° C,
Hot-rolled to 5 mmt, from temperature of 700 ° C or higher to 30
Water cooling was performed at a rate of ° C / sec.
【００２４】さらに、冷間圧延により０．５ｍｍの板厚
にした後、５００℃の温度で１２０分間の焼鈍を行な
い、その後冷間圧延により０．４ｍｍｔの板材を得た。
この板材につき導電率、硬さ、耐熱性の試験を行った。Further, after a thickness of 0.5 mm was obtained by cold rolling, annealing was performed at a temperature of 500 ° C. for 120 minutes, and then a 0.4 mmt sheet material was obtained by cold rolling.
This plate was tested for electrical conductivity, hardness and heat resistance.
【００２５】これらの試料の試験結果を表２に示す。Table 2 shows the test results of these samples.
【００２６】[0026]
【表１】 No. Cu Ni Si Zn Mn Mg Cr,Zr,Ti B,Al N,P Ga,In As,Sb １ 残部 0.12 0.023 0.08 ・・ ・・ ・・ Tr Tr ２ 残部 0.25 0.046 0.20 0.020 0.004 ・・ Tr Tr ３ 残部 0.40 0.098 0.08 0.021 0.003 Cr:0.005 Tr Tr ４ 残部 0.60 0.112 0.20 0.019 0.006 Zr:0.004 Tr Tr ５ 残部 0.91 0.184 0.70 0.021 0.005 Ti:0.005 Tr Tr ６ 残部 1.24 0.283 0.68 ・・ ・・ ・・ Tr P:0.031 ７ 残部 0.04 0.009 0.08 ・・ ・・ ・・ Al:0.029 Tr ８ 残部 0.43 0.121 0.01 ・・ ・・ ・・ Tr As:0.017 Ｎｏ．１：参考例 Ｎｏ．２〜Ｎｏ．５：本発明 Ｎｏ．６〜Ｎｏ．８：比較例 Ｔｒ：０．００１ｗｔ％以下[Table 1] No. Cu Ni Si Zn Mn Mg Cr, Zr, Ti B, Al N, P Ga, In As, Sb 1 balance 0.12 0.023 0.08・ Tr Tr 3 remaining 0.40 0.098 0.08 0.021 0.003 Cr: 0.005 Tr Tr 4 remaining 0.60 0.112 0.20 0.019 0.006 Zr: 0.004 Tr Tr 5 remaining 0.91 0.184 0.70 0.021 0.005 Ti: 0.005 Tr Tr 6 remaining 1.24 0.283 0.68 ・ ・ ・ ・ ・ ・Tr P: 0.031 7 Remainder 0.04 0.009 0.08 ・ ・ ・ ・ ・ ・ Al: 0.029 Tr 8 Remainder 0.43 0.121 0.01 ・ ・ ・ ・ ・ ・ Tr As: 0.017 No. 1: Reference example No. 2-No. 5: Invention No. 5 6-No. 8: Comparative example Tr: 0.001 wt% or less
【００２７】[0027]
【表２】 [Table 2]
【００２８】試験方法は以下に説明する通りである。 （１）導電率は１５ｍｍｗ×３００ｍｌの試験片を用
い、ダブルブリッジにより測定した電気抵抗の値から算
出した。 （２）硬さは、マイクロビッカース硬さ計を用い荷重５
００ｇｒで測定した。 （３）耐熱性はソルトバスを用い、各温度で５分間の加
熱を行なった後硬さを測定し、加熱後の硬さが加熱前の
硬さの８０％になる温度をもって評価した。 （４）半田の耐剥離性は、２０ｍｍｗ×５０ｍｍｌの試
験片に６０Ｓｎ−４０Ｐｂの半田を弱活性フラックスを
用い２３０℃の温度で５秒間浸漬して半田付けした後、
１５０℃の温度で５００時間加熱後、２ｍｍＲで１８０
°曲げ戻しを行ない、剥離の有無を調べ評価した。The test method is as described below. (1) The conductivity was calculated from a value of electric resistance measured by a double bridge using a test piece of 15 mmw × 300 ml. (2) Hardness was measured using a micro Vickers hardness tester with a load of 5
It was measured at 00 gr. (3) The heat resistance was measured using a salt bath after heating for 5 minutes at each temperature, and the hardness was evaluated at a temperature at which the hardness after heating was 80% of the hardness before heating. (4) The peeling resistance of the solder was determined by immersing a 60Sn-40Pb solder in a test piece of 20mmw × 50mm for 5 seconds at a temperature of 230 ° C. using a weak active flux and soldering.
After heating at a temperature of 150 ° C. for 500 hours, 180 at 2 mmR
° The sheet was bent back, and the presence or absence of peeling was examined and evaluated.
【００２９】表２から明らかなように、本発明合金Ｎ
ｏ．２〜Ｎｏ．５は５５％ＩＡＣＳ以上の良好な導電率
とＨｖ１００以上の硬さ、および４００℃以上の耐熱性
を有している。また、Ｚｎの効果により半田の耐剥離性
も良好である。As is clear from Table 2, the alloy N of the present invention
o. 2 to No. No. 5 has good electrical conductivity of 55% IACS or more, hardness of Hv 100 or more, and heat resistance of 400 ° C. or more. Also, the peeling resistance of the solder is good due to the effect of Zn.
【００３０】これに対し比較例Ｎｏ．６はＮｉおよびＳ
ｉ量が高く硬さや耐熱性には優れるものの導電率が４８
％ＩＡＣＳと低い。またＮｏ．７はＮｉおよびＳｉ量が
低いため導電率は高いが耐熱性が３７０℃と低い。Ｎ
ｏ．８はＺｎ含有量が低いため半田の耐剥離性に劣って
いる。On the other hand, in Comparative Example No. 6 is Ni and S
The conductivity is 48 although the i content is high and the hardness and heat resistance are excellent.
Low as% IACS. No. Sample No. 7 has high conductivity due to low amounts of Ni and Si, but has low heat resistance of 370 ° C. N
o. No. 8 is inferior in the peeling resistance of the solder because the Zn content is low.
【００３１】また、本発明合金Ｎｏ．２〜Ｎｏ．５はII
Iｂ族およびＶ族ｂに属する元素がそれぞれ０．０１ｗ
ｔ％以下であるためＡｕ−Ｓｉ合金法によりべアボンデ
ィングされてもＳｉ素子の特性を劣化させない。これに
対し比較例Ｎｏ．６〜Ｎｏ．８はIIIｂ族およびＶｂ族
の元素をそれぞれ０．０１ｗｔ％を越えて含有している
ためＡｕ−Ｓｉ共晶合金法によりべアボンディングされ
るとＳｉ素子の特性を劣化させる。Further, the alloy No. 1 of the present invention. 2 to No. 5 is II
Each of the elements belonging to Group Ib and Group Vb is 0.01 w
Since the content is less than t%, the characteristics of the Si element are not deteriorated even if the bonding is performed by the Au-Si alloy method. On the other hand, in Comparative Example No. 6-No. 8 contains elements of Group IIIb and Group Vb in excess of 0.01 wt%, respectively, and thus, when subjected to bare bonding by the Au-Si eutectic alloy method, the characteristics of the Si element are deteriorated.
【００３２】[0032]
【発明の効果】以上説明の通り、本発明に係るベアボン
ディング用リードフレーム材料は上記の構成を有してい
るため、導電性、強度、および耐熱性に優れ、かつ安価
であり、めっきを省略しＡｕ−Ｓｉ共晶合金法によるダ
イボンディングを行ってもＳｉ素子に悪影響を及ぼさな
いという効果を有している。As described above, since the lead frame material for bare bonding according to the present invention has the above structure, it is excellent in conductivity, strength and heat resistance, is inexpensive, and does not require plating. However, there is an effect that even if die bonding by the Au-Si eutectic alloy method is performed, there is no adverse effect on the Si element.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C22C 9/06 H01L 21/52 H01L 21/60 H01L 23/48Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) C22C 9/06 H01L 21/52 H01L 21/60 H01L 23/48
Claims (2)
ｔ％は含まず）、Ｓｉ：０．０１〜０．２５ｗｔ％、Ｚ
ｎ：０．０５〜１．０ｗｔ％を含有し、ＩＩＩｂ族の元
素を総量で０．０１ｗｔ％以下、Ｖｂ族の元素を総量で
０．０１ｗｔ％以下に制限し、残部実質的にＣｕよりな
ることを特徴とするベアボンディング用リードフレーム
材料。1. Ni: 0. 4 to 1.0 wt% (0.4 w
t% is not included), Si: 0.01 to 0.25 wt%, Z
n: contains 0.05 to 1.0 wt%, restricts the group IIIb element to a total amount of 0.01 wt% or less, the Vb group element to a total amount of 0.01 wt% or less, and substantially consists of Cu. A lead frame material for bare bonding, characterized in that:
０．０１〜０．２５ｗｔ％、Ｚｎ：０．０５〜１．０ｗ
ｔ％、Ｍｎ：０．０１〜０．０５ｗｔ％、Ｍｇ：０．０
０１〜０．０１ｗｔ％、Ｃｒ，Ｔｉ，Ｚｒの内から選ば
れる１種または２種以上を０．００１〜０．０１ｗｔ％
を含有し、ＩＩＩｂ族の元素を総量で０．０１ｗｔ％以
下、Ｖｂ族の元素を総量で０．０１ｗｔ％以下に制限
し、残部実質的にＣｕよりなることを特徴とするベアボ
ンディング用リードフレーム材料。2. Ni: 0.1 to 1.0 wt%, Si:
0.01 to 0.25 wt%, Zn: 0.05 to 1.0 w
t%, Mn: 0.01 to 0.05 wt%, Mg: 0.0
01 to 0.01 wt%, one or more selected from Cr, Ti and Zr in an amount of 0.001 to 0.01 wt%
Wherein the total amount of group IIIb elements is 0.01 wt% or less, the total amount of Vb group elements is 0.01 wt% or less, and the balance is substantially made of Cu. material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3080706A JP2834593B2 (en) | 1990-06-25 | 1991-03-19 | Lead frame material for bare bonding |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16595490 | 1990-06-25 | ||
| JP2-165954 | 1990-06-25 | ||
| JP3080706A JP2834593B2 (en) | 1990-06-25 | 1991-03-19 | Lead frame material for bare bonding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04218632A JPH04218632A (en) | 1992-08-10 |
| JP2834593B2 true JP2834593B2 (en) | 1998-12-09 |
Family
ID=26421680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3080706A Expired - Fee Related JP2834593B2 (en) | 1990-06-25 | 1991-03-19 | Lead frame material for bare bonding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2834593B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3739214B2 (en) * | 1998-03-26 | 2006-01-25 | 株式会社神戸製鋼所 | Copper alloy sheet for electronic parts |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5834536B2 (en) * | 1980-06-06 | 1983-07-27 | 日本鉱業株式会社 | Copper alloy for lead material of semiconductor equipment |
| JPS63297531A (en) * | 1987-05-29 | 1988-12-05 | Kobe Steel Ltd | Copper alloy for terminal and lead frame having excellent hot workability and its production |
-
1991
- 1991-03-19 JP JP3080706A patent/JP2834593B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04218632A (en) | 1992-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |