JPH10223827A - Lead frame material - Google Patents

Lead frame material

Info

Publication number
JPH10223827A
JPH10223827A JP2061397A JP2061397A JPH10223827A JP H10223827 A JPH10223827 A JP H10223827A JP 2061397 A JP2061397 A JP 2061397A JP 2061397 A JP2061397 A JP 2061397A JP H10223827 A JPH10223827 A JP H10223827A
Authority
JP
Japan
Prior art keywords
layer
copper
nickel
lead frame
phosphorus
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
JP2061397A
Other languages
Japanese (ja)
Other versions
JP3066952B2 (en
Inventor
Tatsunori Matsumoto
逹則 松本
Masami Noguchi
昌巳 野口
Kazuyoshi Aso
和義 阿曽
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.)
Nippon Denkai Co Ltd
Original Assignee
Nippon Denkai 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 Nippon Denkai Co Ltd filed Critical Nippon Denkai Co Ltd
Priority to JP9020613A priority Critical patent/JP3066952B2/en
Priority to PCT/JP1998/000210 priority patent/WO1998034278A1/en
Priority to US09/341,950 priority patent/US6117566A/en
Priority to KR1019997003963A priority patent/KR100322975B1/en
Priority to TW087101182A priority patent/TW391042B/en
Publication of JPH10223827A publication Critical patent/JPH10223827A/en
Application granted granted Critical
Publication of JP3066952B2 publication Critical patent/JP3066952B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To obtain a lead frame material which can easily be formed by electroplating without the need of a complicated process and in which an etching stop layer superior in heat resistance is set to be an intermediate layer by providing a nickel-phosphorus alloy layer between a copper or copper alloy layer and a copper layer, which respectively have specified thicknesses. SOLUTION: The lead frame material is manufactured by forming the nickel- phosphorus alloy layer having the thickness of 0.04-70dμon the surface of the copper or copper alloy layer having the thickness of 35-30μm by nickel- phosphorus plating and forming the copper layer having the thickness of 0.2-30μm on the surface of the nickel-phosphorus alloy layer by copper plating. Furthermore, a chromate layer is formed on the surface of the copper layer if need. Since the nickel-phosphorus alloy layer can easily be formed by electroplating, the inexpensive lead frame member can be obtained without the complicated process. Then, the copper of the adjacent layer is prevented from being diffused to the nickel-phosphorus layer even if it is exposed to the high temperature since nickel-phosphorus alloy contains phosphorus.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、半導体装置のリー
ドフレームの製造に好適に用いられるリードフレーム材
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead frame material suitably used for manufacturing a lead frame of a semiconductor device.

【0002】[0002]

【従来の技術】IC、LSIの高集積化に伴いピン数が
増加し、そのためリード部を微細化することが必要とさ
れている。リードフレーム材をエッチングしてリードフ
レームを製造する方法はリード部の微細化に好適な方法
であり、特開平3−148856号公報にはアルミニウ
ムからなるエッチングストップ層を厚さの異なる2層の
金属層によりサンドイッチ状に挟んだ三層構造のリード
フレーム材を用い、これをエッチングすることによりリ
ードフレームを製造する方法が記載されている。
2. Description of the Related Art The number of pins has increased with the increase in the degree of integration of ICs and LSIs. Therefore, it is necessary to miniaturize the lead portions. A method of manufacturing a lead frame by etching a lead frame material is a method suitable for miniaturization of a lead portion. Japanese Unexamined Patent Publication (Kokai) No. 3-148856 discloses an etching stop layer made of aluminum having two layers of metal having different thicknesses. A method of manufacturing a lead frame by using a lead frame material having a three-layer structure sandwiched between layers in a sandwich shape and etching the lead frame material is described.

【0003】この方法によれば、エッチングストップ層
を設けたことにより厚さの異なる2層の金属層を選択的
にエッチングすることができ、リードフレームの母材と
なる厚い金属層を必要な機械的強度が得られるような厚
さとし、ICとの接続部となる薄い金属層を接続部に要
求される微細さに応じた厚さとすることにより、ICと
の微細な接続部と十分な機械的強度を有するリードフレ
ームが製造できる。
According to this method, two metal layers having different thicknesses can be selectively etched by providing the etching stop layer, and a thick metal layer serving as a base material of a lead frame is required. By providing a thin metal layer serving as a connecting portion with the IC with a thickness corresponding to the fineness required for the connecting portion, a fine connecting portion with the IC and sufficient mechanical strength can be obtained. A strong lead frame can be manufactured.

【0004】しかしながら、この方法に用いられる三層
構造のリードフレーム材は、エッチングストップ層材料
が蒸着によって形成されたアルミニウムである。蒸着に
よるアルミニウム層の形成は、工程が煩雑で、リードフ
レーム材のコスト高につながるといった問題がある。
However, the lead frame material having a three-layer structure used in this method is aluminum on which an etching stop layer material is formed by vapor deposition. The formation of an aluminum layer by vapor deposition has a problem that the process is complicated and leads to an increase in the cost of the lead frame material.

【0005】また、この三層構造のリードフレーム材を
用いてリードフレームを製造する方法においては、リー
ドが形成された面の面上に絶縁保護膜であるポリイミド
フィルムをポリアミド酸系接着剤を用いて350℃以上
の温度で硬化させて接着するなど、リードフレーム材が
高温にさらされる工程が存在し、エッチングストップ層
にはこのような高温にも耐える耐熱性が要求される。電
気めっき等により容易に層形成しうるニッケル層など
は、350℃以上の高温にさらされると金属層の銅がニ
ッケル層に拡散し、エッチングストップ層としての役割
を果たすことができない。
In a method of manufacturing a lead frame using a lead frame material having a three-layer structure, a polyimide film which is an insulating protective film is formed on a surface on which leads are formed by using a polyamic acid-based adhesive. There is a process in which the lead frame material is exposed to a high temperature, such as curing and bonding at a temperature of 350 ° C. or more, and the etching stop layer is required to have heat resistance to withstand such a high temperature. When a nickel layer or the like which can be easily formed by electroplating or the like is exposed to a high temperature of 350 ° C. or more, copper of the metal layer diffuses into the nickel layer and cannot function as an etching stop layer.

【0006】[0006]

【発明が解決しようとする課題】本発明の目的は、蒸着
などの煩雑な工程を必要とせず電気めっきにより容易に
形成できるとともに、耐熱性に優れたエッチングストッ
プ層を中間層として有する三層構造のリードフレーム材
を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a three-layer structure which can be easily formed by electroplating without requiring a complicated process such as vapor deposition and has an etching stop layer having excellent heat resistance as an intermediate layer. And a lead frame material.

【0007】[0007]

【課題を解決するための手段】本発明者らは、上記課題
を解決するために鋭意検討を重ねた結果、三層構造のリ
ードフレーム材のエッチングストップ層として特定の厚
みの特定の合金層を採用することにより、蒸着などの煩
雑な工程を必要とせず電気めっきにより容易にエッチン
グストップ層を形成できるとともに、優れた耐熱性を有
する三層構造のリードフレーム材が得られることを見出
し、この知見に基づいて本発明を完成するに至った。
The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that a specific alloy layer having a specific thickness is used as an etching stop layer of a lead frame material having a three-layer structure. By adopting this method, it was found that an etching stop layer can be easily formed by electroplating without the need for complicated steps such as vapor deposition, and a lead frame material having a three-layer structure having excellent heat resistance was obtained. Based on the above, the present invention has been completed.

【0008】すなわち、本発明は、厚さ35〜300μ
mの銅又は銅合金層と厚さ0.2〜30μmの銅層の間
に厚さ0.04〜70μmのニッケル−リン合金層を設
けたことを特徴とするリードフレーム材を提供するもの
である。
[0008] That is, the present invention provides a thickness of 35 to 300 μm.
A lead frame material comprising a nickel-phosphorous alloy layer having a thickness of 0.04 to 70 μm provided between a copper or copper alloy layer having a thickness of 0.2 m and a copper layer having a thickness of 0.2 to 30 μm. is there.

【0009】[0009]

【発明の実施の形態】本発明のリードフレーム材におい
て、厚さ35〜300μmの銅又は銅合金層はリードフ
レームのアウターリード等を形成するための部材となる
もので、厚さが35μm未満であるとアウターリードと
しての機械的強度が保持できなくなり、厚さが300μ
mを超えると長時間のエッチングが必要となり、生産性
が悪くなる。好ましい厚さは50〜200μmである。
銅合金としては、例えば、銅と、Sn、Ni、Zn、
P、Fe、Zr、Cr、Mg及びSiから選ばれる少な
くとも1種の金属との合金であって、銅合金中、銅以外
の上記金属の含有量が0.01〜5重量%であるものが
好適である。また、銅又は銅合金層は、表面粗さRaが
0.1〜2.0μmであることが好ましく、さらに好ま
しくは0.2〜0.8μmである。
BEST MODE FOR CARRYING OUT THE INVENTION In the lead frame material of the present invention, a copper or copper alloy layer having a thickness of 35 to 300 μm is a member for forming outer leads and the like of a lead frame. If it is, the mechanical strength of the outer lead cannot be maintained, and the thickness is 300μ.
If it exceeds m, etching for a long time is required, and productivity is deteriorated. The preferred thickness is 50-200 μm.
As the copper alloy, for example, copper, Sn, Ni, Zn,
An alloy with at least one metal selected from P, Fe, Zr, Cr, Mg, and Si, wherein a content of the metal other than copper in the copper alloy is 0.01 to 5% by weight. It is suitable. Further, the copper or copper alloy layer preferably has a surface roughness Ra of 0.1 to 2.0 μm, more preferably 0.2 to 0.8 μm.

【0010】厚さ0.2〜30μmの銅層は微細なパタ
ーンを形成するための部材となるもので、厚さが0.2
μm未満であったり30μmを超えたりすると微細なパ
ターンが形成できない。好ましい厚さは0.5〜10μ
mである。
The copper layer having a thickness of 0.2 to 30 μm serves as a member for forming a fine pattern.
If it is less than μm or more than 30 μm, a fine pattern cannot be formed. Preferred thickness is 0.5-10μ
m.

【0011】厚さ0.04〜70μmのニッケル−リン
合金層は銅又は銅合金用のエッチング液にエッチングさ
れない金属層であり、これを挟む金属層の一方に対する
エッチングによって他方がエッチングされることを阻む
役割を果たす。ニッケル−リン合金層は電気めっきによ
り容易に形成できるため、従来、蒸着により形成されて
いたアルミニウム層と比べ、煩雑な工程なしに低コスト
のリードフレーム材を得ることができるという利点があ
る。また、ニッケル−リン合金はリンを含有しているこ
とにより高温にさらされても隣接する層の銅がニッケル
−リン合金層に拡散することがなく、耐熱性に優れてい
る。ニッケル−リン合金層中のリンの含有量は好ましく
は0.3〜1.0重量%、さらに好ましくは0.5〜
0.8重量%である。リンの含有量が0.3重量%未満
では耐熱性が低下し、銅のニッケル層への拡散が起こ
り、エッチングストップ層としての役割を果たせなくな
る。また、1.0重量%を超えるとニッケル−リン電析
効率が低下し、生産性が低下する。
The nickel-phosphorus alloy layer having a thickness of 0.04 to 70 μm is a metal layer which is not etched by an etching solution for copper or copper alloy. Plays a blocking role. Since the nickel-phosphorus alloy layer can be easily formed by electroplating, there is an advantage that a low-cost lead frame material can be obtained without complicated steps as compared with an aluminum layer conventionally formed by vapor deposition. Further, since the nickel-phosphorus alloy contains phosphorus, even if it is exposed to a high temperature, copper in an adjacent layer does not diffuse into the nickel-phosphorus alloy layer, and is excellent in heat resistance. The content of phosphorus in the nickel-phosphorus alloy layer is preferably 0.3 to 1.0% by weight, more preferably 0.5 to 1.0% by weight.
0.8% by weight. If the phosphorus content is less than 0.3% by weight, the heat resistance decreases, copper diffuses into the nickel layer, and cannot serve as an etching stop layer. On the other hand, when the content exceeds 1.0% by weight, the nickel-phosphorus electrodeposition efficiency decreases, and the productivity decreases.

【0012】ニッケル−リン合金層の厚さが0.04μ
m未満であると、エッチングストップ層としての機能、
すなわち、一方の金属層をエッチングする際に、他方の
金属層を保護する機能が十分に確保できなくなる。ま
た、70μmを超えると、最終的にエッチングストップ
層を除去する際に長時間を要し、リードフレーム作製時
の生産性が低下する。好ましい厚さは1.6〜10μm
であり、さらに好ましくは2.0〜5.0μmである。
The thickness of the nickel-phosphorus alloy layer is 0.04 μm.
m, the function as an etching stop layer,
That is, when one of the metal layers is etched, the function of protecting the other metal layer cannot be sufficiently secured. On the other hand, when the thickness exceeds 70 μm, it takes a long time to finally remove the etching stop layer, and the productivity in manufacturing a lead frame is reduced. Preferred thickness is 1.6 to 10 μm
And more preferably 2.0 to 5.0 μm.

【0013】また、防錆性を確保する点から、リードフ
レーム材の表面にはクロメート処理や亜鉛化合物を含む
クロメート処理が施されていることが好ましい。
From the viewpoint of ensuring rust prevention, the surface of the lead frame material is preferably subjected to a chromate treatment or a chromate treatment containing a zinc compound.

【0014】本発明のリードフレーム材は、厚さ35〜
300μmの銅又は銅合金層の表面にニッケル−リンめ
っきにより厚さ0.04〜70μmのニッケル−リン合
金層を形成し、更にニッケル−リン合金層の表面に銅め
っきにより銅層を形成することにより製造することがで
きる。必要に応じ、銅層の表面にクロメート層を形成す
る。ニッケル−リンめっきに用いられる好ましいめっき
液組成及びめっき条件を下記に記載する。 (1)めっき浴組成 硫酸ニッケル 200〜300g/l ホウ酸 10〜100g/l 亜リン酸 0.2〜20g/l o−スルホ安息香酸イミドナトリウム 1〜50g/l 硫酸マグネシウム 10〜200g/l (2)電解条件 pH:1.6〜3.0、電流密度:1〜10A/d
2、液温:20〜70℃、 本発明のリードフレーム材を用いて製造できる好ましい
半導体装置としては、TBGA(tape ball
grid array)、CSP(chipsize
package)などが挙げられる。
The lead frame material of the present invention has a thickness of 35 to
Forming a nickel-phosphorus alloy layer having a thickness of 0.04 to 70 μm by nickel-phosphorus plating on the surface of a copper or copper alloy layer of 300 μm, and forming a copper layer by copper plating on the surface of the nickel-phosphorus alloy layer Can be manufactured. If necessary, a chromate layer is formed on the surface of the copper layer. Preferred plating solution compositions and plating conditions used for nickel-phosphorus plating are described below. (1) Plating bath composition Nickel sulfate 200 to 300 g / l Boric acid 10 to 100 g / l Phosphorous acid 0.2 to 20 g / l Sodium imide sulfobenzoate 1 to 50 g / l Magnesium sulfate 10 to 200 g / l ( 2) Electrolysis conditions pH: 1.6 to 3.0, current density: 1 to 10 A / d
m 2 , liquid temperature: 20-70 ° C. As a preferable semiconductor device that can be manufactured using the lead frame material of the present invention, TBGA (tape ball)
grid array), CSP (chipsize)
package) and the like.

【0015】[0015]

【実施例】以下、本発明を実施例及び比較例によって更
に具体的に説明するが、本発明はこれらの実施例に限定
されるものではない。
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples.

【0016】実施例1 厚さ150μmの銅合金箔(三菱伸銅(株)製、銅−ニ
ッケル−スズ系合金、商品名:TAMAC15、表面粗
さRa:0.2μm)を用意し、その非めっき面にあら
かじめプラスチック製のめっき金属析出防止被膜を施し
た。
Example 1 A copper alloy foil having a thickness of 150 μm (copper-nickel-tin alloy, manufactured by Mitsubishi Shindoh Co., Ltd., trade name: TAMAC15, surface roughness Ra: 0.2 μm) was prepared. A plating metal deposition prevention coating made of plastic was previously applied to the plating surface.

【0017】これを用いて下記の製造工程(1〜5)を
順次行い、銅合金層の上に、ニッケル−リン合金層(厚
さ2μm、リン含有量0.8重量%、表面粗さRa:
0.2μm)及び銅層(厚さ2μm、表面粗さRa:
0.2μm)を形成し、三層構造のリードフレーム材を
製造した。なお、1〜5の各工程の終了後水洗を行っ
た。 製造工程 1.脱脂処理 (1)脱脂液 オルトケイ酸ナトリウム 30g/l 炭酸ナトリウム 20g/l 水酸化ナトリウム 20g/l (2)電解脱脂条件 電流密度:5A/dm2、処理時間:30秒、液温:4
0℃、陰極:銅合金箔、陽極:酸化イリジウム 2.酸洗処理 (1)洗浄液 硫酸:25g/l (2)洗浄条件 処理時間:30秒、液温:20℃ 3.ニッケル−リン合金めっき層の形成 (1)めっき液 硫酸ニッケル 300g/l ホウ酸 40g/l 亜リン酸 4g/l o−スルホ安息香酸イミドナトリウム 10g/l 硫酸マグネシウム 80g/l (2)電解条件 電流密度:1.1A/dm2、電解時間:10分、液
温:35℃、pH:2.5、陽極:酸化イリジウム 4.銅めっき層の形成 (1)めっき液 硫酸銅 280g/l 硫酸 70g/l 添加剤(ゼラチン) 3ppm 添加剤(Cl-) 10ppm (2)電解条件 電流密度:3.5A/dm2、電解時間:4分、液温:
35℃、陽極:酸化イリジウム 5.防錆層の形成 (1)処理液 重クロム酸ナトリウム 3.5g/l (2)処理条件 浸漬処理時間:25秒、液温:20℃、pH:4.7 6.乾燥 乾燥条件 温度:100℃、時間:5分 上記工程により得られた三層構造のリードフレーム材を
使用して、N2ガス雰囲気中で加熱処理(200℃、3
00℃、400℃、500℃)を30分間施し、下記の
高温熱拡散試験によりリードフレーム材の耐熱性を評価
した。
Using this, the following manufacturing steps (1 to 5) are sequentially performed, and a nickel-phosphorus alloy layer (thickness 2 μm, phosphorus content 0.8% by weight, surface roughness Ra) is formed on the copper alloy layer. :
0.2 μm) and a copper layer (thickness 2 μm, surface roughness Ra:
0.2 μm) to produce a three-layered lead frame material. After the completion of each of the steps 1 to 5, washing was performed. Manufacturing process Degreasing treatment (1) Degreasing liquid Sodium orthosilicate 30 g / l Sodium carbonate 20 g / l Sodium hydroxide 20 g / l (2) Electrolytic degreasing conditions Current density: 5 A / dm 2 , treatment time: 30 seconds, liquid temperature: 4
1. 0 ° C., cathode: copper alloy foil, anode: iridium oxide 2. Pickling treatment (1) Cleaning solution sulfuric acid: 25 g / l (2) Cleaning conditions Treatment time: 30 seconds, liquid temperature: 20 ° C Formation of nickel-phosphorus alloy plating layer (1) Plating solution Nickel sulfate 300 g / l Boric acid 40 g / l Phosphorous acid 4 g / l O-sulfobenzoimide sodium 10 g / l Magnesium sulfate 80 g / l (2) Electrolytic conditions Current 3. Density: 1.1 A / dm 2 , electrolysis time: 10 minutes, liquid temperature: 35 ° C., pH: 2.5, anode: iridium oxide Formation of copper plating layer (1) Plating solution Copper sulfate 280 g / l Sulfuric acid 70 g / l Additive (gelatin) 3 ppm Additive (Cl ) 10 ppm (2) Electrolysis conditions Current density: 3.5 A / dm 2 , electrolysis time: 4 minutes, liquid temperature:
4. 35 ° C., anode: iridium oxide Formation of antirust layer (1) Treatment liquid 3.5 g / l sodium dichromate (2) Treatment conditions Immersion treatment time: 25 seconds, liquid temperature: 20 ° C, pH: 4.7 Drying Drying conditions Temperature: 100 ° C., Time: 5 minutes Using the three-layered lead frame material obtained by the above process, heat treatment (200 ° C., 3 ° C.) in an N 2 gas atmosphere.
(00 ° C., 400 ° C., 500 ° C.) for 30 minutes, and the heat resistance of the lead frame material was evaluated by the following high-temperature heat diffusion test.

【0018】高温熱拡散試験 それぞれの温度で加熱処理した試験片をSEM(走査型
電子顕微鏡)及びオージェ電子分光分析装置を用いリー
ドフレームの断面(ニッケル−リン合金層と薄い銅層の
接合部)の加熱温度による金属相互の熱拡散合金化の度
合いを分析し、熱拡散率(%)として求め、その数値を
表1に示した。熱拡散率(%)が小さい程、金属層相互
の合金化が進行していないことを意味しており、リード
フレーム材は耐熱性に優れ、選択エッチング性に優れた
ものとなる。
High-temperature thermal diffusion test A test frame subjected to heat treatment at each temperature was subjected to SEM (scanning electron microscope) and Auger electron spectroscopy to cross-section a lead frame (joining portion between nickel-phosphorus alloy layer and thin copper layer). The degree of heat diffusion alloying between metals depending on the heating temperature was analyzed and determined as a thermal diffusivity (%). The numerical values are shown in Table 1. The smaller the thermal diffusivity (%), the less alloying between the metal layers has progressed, and the lead frame material has excellent heat resistance and excellent selectivity.

【0019】比較例1 実施例1と同様の銅合金箔を使用し、上記工程3を下記
のニッケルめっき層の形成工程3′に変更して、ニッケ
ル−リン合金層をニッケル層(厚さ2μm、表面粗さR
a0.2μm)に変えた以外は実施例1と同様にして、
リードフレーム材を作製し、実施例1と同様に熱拡散試
験を行いその結果を表1に示した。 3′.ニッケルめっき層の形成 (1)めっき液 硫酸ニッケル 280g/l ホウ酸 40g/l o−スルホ安息香酸イミドナトリウム 5g/l (2)電解条件 電流密度:1.0A/dm2、電解時間:10分、液
温:35℃、pH:2.5、陽極:酸化イリジウム
Comparative Example 1 Using the same copper alloy foil as in Example 1, the above step 3 was changed to the following nickel plating layer forming step 3 ', and the nickel-phosphorus alloy layer was replaced with a nickel layer (2 μm thick). , Surface roughness R
a 0.2 μm), except that it was changed to
A lead frame material was prepared and subjected to a thermal diffusion test in the same manner as in Example 1, and the results are shown in Table 1. 3 '. Formation of nickel plating layer (1) Plating solution Nickel sulfate 280 g / l Boric acid 40 g / l Sodium sulfobenzoimide 5 g / l (2) Electrolysis conditions Current density: 1.0 A / dm 2 , electrolysis time: 10 minutes , Liquid temperature: 35 ° C, pH: 2.5, anode: iridium oxide

【0020】[0020]

【表1】 表1の結果より、実施例1のリードフレーム材は、耐熱
性に優れていることがわかる。
[Table 1] The results in Table 1 show that the lead frame material of Example 1 has excellent heat resistance.

【0021】[0021]

【発明の効果】本発明のリードフレーム材は、ニッケル
−リン合金からなるエッチングストップ層を中間層とし
て有する三層構造を有しているため、微細なリード部の
形成に適しているのみならず、耐熱性にも優れたもので
ある。また、本発明のリードフレーム材は、エッチング
ストップ層が電気めっきにより形成できるニッケル−リ
ン合金層であることから、蒸着などの煩雑な工程を必要
とせず容易に製造することができ、生産性にも優れたも
のである。
The lead frame material of the present invention has a three-layer structure having an etching stop layer made of a nickel-phosphorus alloy as an intermediate layer, so that it is not only suitable for forming fine lead portions. It is also excellent in heat resistance. In addition, since the etching stop layer is a nickel-phosphorus alloy layer that can be formed by electroplating, the lead frame material of the present invention can be easily manufactured without a complicated process such as vapor deposition, and can improve productivity. Is also excellent.

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成10年3月4日[Submission date] March 4, 1998

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】請求項1[Correction target item name] Claim 1

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【手続補正2】[Procedure amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0008[Correction target item name] 0008

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0008】すなわち、本発明は、厚さ35〜300μ
mの銅又は銅合金層と厚さ0.2〜30μmの銅層の間
に厚さ1.6〜10μm、リン含有量が0.3〜1.0
重量%のニッケル−リン合金層を設けたことを特徴とす
るリードフレーム材を提供するものである。
[0008] That is, the present invention provides a thickness of 35 to 300 μm.
1.6 to 10 μm in thickness and a phosphorus content of 0.3 to 1.0 m between a copper or copper alloy layer having a thickness of 0.2 m and a copper layer having a thickness of 0.2 to 30 μm.
An object of the present invention is to provide a lead frame material provided with a nickel-phosphorus alloy layer of a weight percent.

【手続補正3】[Procedure amendment 3]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0011[Correction target item name] 0011

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0011】厚さ1.6〜10μm、リン含有量が0.
3〜1.0重量%のニッケル−リン合金層は銅又は銅合
金用のエッチング液にエッチングされない金属層であ
り、これを挟む金属層の一方に対するエッチングによっ
て他方がエッチングされることを阻む役割を果たす。ニ
ッケル−リン合金層は電気めっきにより容易に形成でき
るため、従来、蒸着により形成されていたアルミニウム
層と比べ、煩雑な工程なしに低コストのリードフレーム
材を得ることができるという利点がある。また、ニッケ
ル−リン合金はリンを含有していることにより高温にさ
らされても隣接する層の銅がニッケル−リン合金層に拡
散することがなく、耐熱性に優れている。ニッケル−リ
ン合金層中のリンの含有量は好ましくは0.3〜1.0
重量%、さらに好ましくは0.5〜0.8重量%であ
る。リンの含有量が0.3重量%未満では耐熱性が低下
し、銅のニッケル層への拡散が起こり、エッチングスト
ップ層としての役割を果たせなくなる。また、1.0重
量%を超えるとニッケル−リン電析効率が低下し、生産
性が低下する。
The thickness is 1.6 to 10 μm and the phosphorus content is 0.1 to 10 μm.
The nickel-phosphorus alloy layer of 3 to 1.0% by weight is a metal layer which is not etched by an etching solution for copper or copper alloy, and has a role of preventing one of the metal layers sandwiching the layer from being etched by the other. Fulfill. Since the nickel-phosphorus alloy layer can be easily formed by electroplating, there is an advantage that a low-cost lead frame material can be obtained without complicated steps as compared with an aluminum layer conventionally formed by vapor deposition. Further, since the nickel-phosphorus alloy contains phosphorus, even if it is exposed to a high temperature, copper in an adjacent layer does not diffuse into the nickel-phosphorus alloy layer, and is excellent in heat resistance. The content of phosphorus in the nickel-phosphorus alloy layer is preferably 0.3 to 1.0.
%, More preferably 0.5 to 0.8% by weight. If the phosphorus content is less than 0.3% by weight, the heat resistance decreases, copper diffuses into the nickel layer, and cannot serve as an etching stop layer. On the other hand, when the content exceeds 1.0% by weight, the nickel-phosphorus electrodeposition efficiency decreases, and the productivity decreases.

【手続補正4】[Procedure amendment 4]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0014[Correction target item name] 0014

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0014】本発明のリードフレーム材は、厚さ35〜
300μmの銅又は銅合金層の表面にニッケル−リンめ
っきにより厚さ1.6〜10μm、リン含有量が0.3
〜1.0重量%のニッケル−リン合金層を形成し、更に
ニッケル−リン合金層の表面に銅めっきにより銅層を形
成することにより製造することができる。必要に応じ、
銅層の表面にクロメート層を形成する。ニッケル−リン
めっきに用いられる好ましいめっき液組成及びめっき条
件を下記に記載する。 (1)めっき浴組成 硫酸ニッケル 200〜300g/l ホウ酸 10〜100g/l 亜リン酸 0.2〜20g/l o−スルホ安息香酸イミドナトリウム 1〜50g/l 硫酸マグネシウム 10〜200g/l (2)電解条件 pH:1.6〜3.0、電流密度:1〜10A/d
2、液温:20〜70℃、 本発明のリードフレーム材を用いて製造できる好ましい
半導体装置としては、TBGA(tape ball
grid array)、CSP(chipsize
package)などが挙げられる。
The lead frame material of the present invention has a thickness of 35 to
Nickel-phosphorus plating on the surface of a 300 μm copper or copper alloy layer to a thickness of 1.6 to 10 μm and a phosphorus content of 0.3
It can be manufactured by forming a nickel-phosphorus alloy layer of about 1.0% by weight and further forming a copper layer by copper plating on the surface of the nickel-phosphorus alloy layer. As needed,
A chromate layer is formed on the surface of the copper layer. Preferred plating solution compositions and plating conditions used for nickel-phosphorus plating are described below. (1) Plating bath composition Nickel sulfate 200 to 300 g / l Boric acid 10 to 100 g / l Phosphorous acid 0.2 to 20 g / l Sodium imide sulfobenzoate 1 to 50 g / l Magnesium sulfate 10 to 200 g / l ( 2) Electrolysis conditions pH: 1.6 to 3.0, current density: 1 to 10 A / d
m 2 , liquid temperature: 20-70 ° C. As a preferable semiconductor device that can be manufactured using the lead frame material of the present invention, TBGA (tape ball)
grid array), CSP (chipsize)
package) and the like.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 厚さ35〜300μmの銅又は銅合金層
と厚さ0.2〜30μmの銅層の間に厚さ0.04〜7
0μmのニッケル−リン合金層を設けたことを特徴とす
るリードフレーム材。
A thickness of 0.04 to 7 between a copper or copper alloy layer having a thickness of 35 to 300 μm and a copper layer having a thickness of 0.2 to 30 μm.
A lead frame material provided with a 0-μm nickel-phosphorus alloy layer.
JP9020613A 1997-02-03 1997-02-03 Lead frame material Expired - Fee Related JP3066952B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP9020613A JP3066952B2 (en) 1997-02-03 1997-02-03 Lead frame material
PCT/JP1998/000210 WO1998034278A1 (en) 1997-02-03 1998-01-21 Lead frame material
US09/341,950 US6117566A (en) 1997-02-03 1998-01-21 Lead frame material
KR1019997003963A KR100322975B1 (en) 1997-02-03 1998-01-21 Lead frame material
TW087101182A TW391042B (en) 1997-02-03 1998-02-02 Lead frame material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9020613A JP3066952B2 (en) 1997-02-03 1997-02-03 Lead frame material

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2000064728A Division JP2000232196A (en) 2000-03-09 2000-03-09 Lead frame

Publications (2)

Publication Number Publication Date
JPH10223827A true JPH10223827A (en) 1998-08-21
JP3066952B2 JP3066952B2 (en) 2000-07-17

Family

ID=12032117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9020613A Expired - Fee Related JP3066952B2 (en) 1997-02-03 1997-02-03 Lead frame material

Country Status (1)

Country Link
JP (1) JP3066952B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4110440B2 (en) * 1998-09-30 2008-07-02 東洋鋼鈑株式会社 Manufacturing method of lead frame clad plate and manufacturing method of lead frame
CN103718314A (en) * 2011-08-12 2014-04-09 夏普株式会社 Light-emitting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4110440B2 (en) * 1998-09-30 2008-07-02 東洋鋼鈑株式会社 Manufacturing method of lead frame clad plate and manufacturing method of lead frame
CN103718314A (en) * 2011-08-12 2014-04-09 夏普株式会社 Light-emitting device

Also Published As

Publication number Publication date
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