JP5088981B1 - Pd被覆銅ボールボンディングワイヤ - Google Patents
Pd被覆銅ボールボンディングワイヤ Download PDFInfo
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- JP5088981B1 JP5088981B1 JP2011280584A JP2011280584A JP5088981B1 JP 5088981 B1 JP5088981 B1 JP 5088981B1 JP 2011280584 A JP2011280584 A JP 2011280584A JP 2011280584 A JP2011280584 A JP 2011280584A JP 5088981 B1 JP5088981 B1 JP 5088981B1
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- palladium
- gold
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- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
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Abstract
【解決手段】パラジウム(Pd)中間層表面に厚さ5nm以下の極薄層からなる金(Au)層を形成し、水素を含む不活性雰囲気中で熱処理を行い、金極薄層に中間層のパラジウムが侵入して微細な金相とパラジウム相とが3次元成長するストランスキー・クラスタノフ成長により、金−パラジウム混在層を形成する。
熱処理過程でパラジウムは水素を吸収し、熱処理後急冷することにより、上記混在層のパラジウムを安定化し、溶融ボール形成時に早期に溶融してワイヤ端面を被覆する金に伴って端面に達したパラジウムが溶融して溶融ボール表面層に均一微細に分散して、アルミニウムとの接合界面におけるアルミニウムの酸化を抑制する。
【選択図】なし
Description
しかし、これらの銅線を80℃〜200℃の高温下の環境に置かれる半導体用途に用いようとした場合、アルミニウム(Al)等のパッドにうまくボールボンディングできたとしても、パッドとワイヤの接合界面からアルミニウム(Al)の酸化物が成長して接合界面が剥離することがあった。
一般にこれらのパラジウム被覆層は、素材のパラジウムが高価であるため、比較的薄く、銅(Cu)の芯材に対して高価なパラジウム(Pd)被覆層の占める割合は、20分の1以下と少ないので、銅(Cu)ボールの形成と同時にパラジウム(Pd)が銅(Cu)中に拡散してしまい、溶融ボールの外側にパラジウム(Pd)を均一微細に分散させるに至らない。
また、特許文献4記載のパラジウム被覆銅ワイヤはパラジウム被覆リードフレームとのウエッジ接合を行うためのワイヤであるが、パラジウム被覆層の表面に3〜80nmの厚さを有する金とパラジウムとを含む合金層を形成することが行われている。
しかしながら、このようにパラジウムの合金化を行ってもやはり、芯材の銅に拡散してしまい、溶融ボール表面のパラジウム分散層を形成することはできなかった。
このストランスキー・クロスタノフ型の成長により形成される組織は、極めて薄い金属層で発生し、下地金属から成長したアイランド構造を形成して表面層の平坦性を損なうことで知られている(特許文献5)が、本発明の構成においてこのストランスキー・クラスタノフ成長により形成される組織は、パラジウム被覆層上に形成される金層が極めて薄く、厚さ数nm以下の金層中でパラジウムが3次元成長して形成され、微細なパラジウム相と金相とが混在する構造となる。
金(Au)とパラジウム(Pd)は、本来すべての割合で完全に混ざり合い、結晶格子が約4.9%だけわずかに食い違うだけなので、金(Au)/パラジウム(Pd)二層の密着性は良く、金(Au)層が極薄の場合にはストランスキー・クラスタノフ成長を利用して金(Au)層表面にパラジウム(Pd)下地層を析出させることができる。
(1) 本発明のボールボンディング用被覆銅ワイヤは、銅(Cu)または銅合金からなる芯材、パラジウム(Pd)からなる中間被覆層からなる表面被覆された線径が10〜25μmのボールボンディング用被覆銅ワイヤにおいて、前記中間被覆層は純度99質量%以上のパラジウム(Pd)であり、さらに該中間層上に金(Au)の最上層を形成してその該中間被覆層の芯材とは反対側の接合界面上に前記パラジウム(Pd)と純度99.9質量%以上の金(Au)が熱成長によって入り乱れた、走査電子顕微鏡観察による断面の平均厚さが5nm以下の混在層を有し、かつ、この混在層のパラジウム表面が水素拡散処理されていることを特徴とする。
(2)上記混在層断面の平均厚さが3nm以下である上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(3)上記混在層断面の平均厚さが1nm以下である上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(4)上記パラジウム(Pd)が湿式メッキされた上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(5)上記混在層が強伸線加工された金(Au)およびパラジウム(Pd)が被覆された銅ワイヤに対して、ストランスキー・クラスタノフ成長により、金(Au)の被覆層中にパラジウム(Pd)を3次元成長させ、金(Au)とパラジウム(Pd)が入り乱れた混在層を形成させた上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(6)上記混在層が強伸線加工された金(Au)およびパラジウム(Pd)が被覆された銅ワイヤに対して450℃〜700℃の水素含有不活性雰囲気下で行われた上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(7)上記金(Au)が室温でマグネトロンスパッタされた上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(8)中間被覆層が湿式メッキされたパラジウム(Pd)である上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(9)上記芯材の銅(Cu)が純度99.999質量%以上の銅(Cu)である上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(10)上記芯材の銅(Cu)が純度99.9999質量%以上の銅(Cu)である上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(11)上記芯材の銅合金が0.1〜500質量ppmリン(P)および残部銅(Cu)からなる上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(12)上記芯材の銅合金が0.5〜99質量ppmのジルコニウム(Zr)、スズ(Sn)、バナジウム(V)、ホウ素(B)およびチタン(Ti)のうちの少なくとも1種を総量で0.5〜99質量ppm含み、および残部が純度99.9質量%以上の銅(Cu)からなる上記(1)に記載のボールボンディング用被覆銅ワイヤ。
(13)上記芯材の銅合金が0.5〜99質量ppmのジルコニウム(Zr)、スズ(Sn)、バナジウム(V)、ホウ素(B)およびチタン(Ti)のうちの少なくとも1種を総量で0.5〜99質量ppm、と0.1〜500質量ppmリン(P)とを含み、および残部が純度99.9質量%以上の銅(Cu)からなる上記(1)に記載のボールボンディング用被覆銅ワイヤ。
また、本発明は、純度99.9質量%以上の金(Au)の膜厚と最終熱処理を適当に調整することによって、金(Au)とパラジウム(Pd)の合金層ではなく、金(Au)とパラジウム(Pd)が入り乱れた混在層を形成することができた。
さらに、最終熱処理中に水素ガスを導入することにより、金(Au)表面層に顔を出したパラジウム(Pd)と水素分子を反応させ、水素原子をパラジウム(Pd)内に吸収させて、金(Au)とパラジウム(Pd)が入り乱れた混在層をより確実に安定化させることができた。
本発明のワイヤ構造では、第一ボンドの溶融ボール形成時に、先ずストランスキー・クラスタノフ構造の最表層中で最も融点の低い(1064℃)金(A)が溶融を始め、同じ層中に混在するパラジウムを伴って流動し、中間層のパラジウム層からワイヤ端面に至って露出した銅芯材の表面を覆う。
銅(Cu)は、金(Au)、パラジウム(Pd)よりも融点が高い(1085℃)が、ワイヤ端面で溶融した金(Au)に直接接して速やかに溶融し、いわば溶融した金(Au)を誘い水として速やかに溶融して、ボールを形成する。
ワイヤの構造中で最も融点の高い(1555℃)パラジウム(Pd)は、先に銅が溶融する間その周囲に一旦は薄い鞘状に残るが、銅の溶融ボールが形成する間に溶融しながら銅ボール中に取り込まれて拡散して行き、一方、先に溶融した金(Au)に伴ってワイヤ端面に至った混在層のパラジウムは吸蔵した水素原子により安定化されて合金化することなく最後に溶融し、ボール表面近傍に偏析して高いパラジウム(Pd)濃度を維持するものと考えられる。
「理論的な厚さ」を求めるときの比例定数は、ボンディングワイヤとしての連続伸線の終了後の線径を連続伸線の開始前のワイヤの直径で除した値である。実際の厚さは、高倍率の走査電子顕微鏡で直接観察することができるが、理論的な厚さで見てもナノオーダーであるため、およその平均膜厚しか得られない。薄ければ薄いほど、金(Au)とパラジウム(Pd)のストランスキー・クラスタノフ成長がおきやすい。逆に厚くなり過ぎると、金(Au)とパラジウム(Pd)の相互作用よりも金(Au)相互の相互作用が強くなってパラジウム(Pd)が金(Au)表面から顔を出すことができなくなり、水素原子をパラジウム(Pd)内に吸収させることができなくなる。
なお、スパッタリング法によりコーティングされた金(Au)等の超極薄の表面層は、線材の円周方向の断面形状で幾何学的に均一な円形の膜とはならないが、溶融ボール形成時の表面張力によって芯材の銅(Cu)中に速やかに吸収され、表面層の不均一さは解消され、真球状の溶融ボールが形成される。
パラジウム中間層の純度は、溶融ボールの真球性にさほど影響を与えず、薄くても厚くても偏芯とならないが、連続伸線する上から純度99質量%以上のパラジウム(Pd)が必要である。中間層の厚さは適宜定まるが、パラジウム(Pd)中間層が厚くなればなるほど銅(Cu)または銅合金の芯材の劣化が遅くなる傾向がある。
パラジウム(Pd)電解メッキ浴としては、パラジウムp−ソルト(Pd(NH3)2(NO2)2)、亜硝酸アンモニウムおよび硝酸カリウム、またはパラジウムp−ソルト(Pd(NH3)2(NO2)2)、硝酸アンモニウムおよびアンモニア水の弱アルカリ性アンモニア性水溶液、Pd(NH3)2(COO)2 および(NH4)2HPO4 の中性アンモニア性水溶液(米国特許第S4715935号)などが利用できる。パラジウムp−ソルトを用いた浴では、PHが高いほど、析出物の粒径は大きくなる傾向にあった。
パラジウム(Pd)を乾式メッキする場合、スパッタ膜等の異常析出を防ぐため銅(Cu)の純度は99.99質量%よりも99.999質量%以上のものが好ましい。
また、パラジウム(Pd)を被覆した高純度銅(Cu)の芯材も非酸化性雰囲気中でアーク放電によって真球形状となることが知られている。パラジウム(Pd)の融点(約1555℃)は銅(Cu)の融点(約1085℃)よりも高いので、非酸化性雰囲気中で銅(Cu)が真球形状となるのに引きずられて真球形状となるものと考えられる。
しかし、高純度の金(Au)のボンディングワイヤは雰囲気を問わずアーク放電により溶融ボールを形成すると真球状の溶融ボールが得られるにもかかわらず、高純度の金(Au)を高純度銅(Cu)の芯材に直接被覆したボンディングワイヤは、槍状になってしまい、真球形状のボールが得られない。金(Au)の融点(約1064℃)は、銅(Cu)の融点(約1085度)よりも低いので、銅(Cu)が球状の溶融ボールを形成していく段階で、低融点の金(Au)表面層が銅(Cu)よりも早く早期に融解してワイヤ端面をすばやく包もうとするが、高融点のパラジウム(Pd)が邪魔となる。その結果、低融点の金(Au)は銅(Cu)中への拡散が優先して、溶融銅(Cu)に吸収されていき、その後パラジウム(Pd)が溶融していくものと考えられる。銅(Cu)中の微量添加元素は、溶融現象にほとんど影響しない。
このように一般的なパラジウム被覆銅ワイヤにおいて、最表層の金(Au)層の厚さが溶融ボールの真球性に影響を及ぼすが、本発明においては前記したように先に溶融した金(Au)はワイヤ端面において銅(Cu)の融解を促進するが、本発明における金(Au−パラジウム(Pd)混在層は数nmのオーダーであって、金(Au)の量が微量であるためその影響は抑制され、溶融ボールの真球性に悪影響を及ぼすことはない。
表1に記載の銅(Cu)インゴットから500μmの線径まで伸線加工した銅ワイヤを芯材とし、そのワイヤ表面に通常の方法でパラジウム(Pd)中間層の電解メッキを2.0μm析出させた。このパラジウム(Pd)メッキ浴は、中性のジニトロジアンミンパラジウム浴に10gW/lのリン酸塩を添加したものを使用し、得られたパラジウム(Pd)の純度は99%であった。次いで、室温で純度99.99質量%の金(Au)をマグネトロンスパッタし、0.08μm析出させた。なお、メッキ厚はオージェ電子分光法(AES)で測定した。
その後、この被覆銅ワイヤを最終径の17μmまでダイス伸線した。金(Au)の理論的膜厚は0.0027μmである。次いで、加工歪みを取り除き、伸び値が10%程度になるように所定の最終熱処理を施した。最終熱処理条件は、5%水素+窒素雰囲気で700℃の熱処理炉の長さ50cmを8m/秒で通過させ、10%エタノール水溶液(20℃)中で冷却した。
〔比較例1〕
〔比較例2〕
それらの接合条件、試験条件及び評価結果を次に示す。
それをシリコン基板上の0.8μmアルミニウム(Al-0.5%Cu)電極膜に接合し、ワイヤ他端を4μmの銀(Ag)メッキした200℃のリードフレーム(材質は42アロイ、膜厚は150μm)上にステッチ接合した。キャピラリーはSPT社製を使用し、溶融ボールに関するワイヤボンダの設定値は、EFO Fire ModeをBal Sizeとし、FAB Sizeは実際の溶融ボール径がワイヤ径の2倍となるように調整した。圧着径はワイヤ径の2.5倍となるように、ボンディング時の接合条件を調整した。
上記の条件でボンディングされ、1st接合部がアルミニウム(Al-0.5%Cu)電極膜に、2nd接合部が銀(Ag)メッキしたリードフレームにボンディングしたサンプルを用いた。当該サンプルの1st接合部のパッド形状は角90μmから成り、100μmピッチで配置されている。また、隣接する1st接合部は一部電気的に通電するように回路設計されている。ボンディング後はハロゲンが含まれる市販の封止樹脂で樹脂モールドした後、余分なタイバー等を切断し、その後温度175℃で2時間キュアし、最終的に温度220℃の高温加熱炉で任意の時間放置した。電気抵抗は、KEITHLEY社製の製品名「ソースメーター(型式2004)」を用い、専用のICソケットおよび専用に構築した自動測定システムでおこなった。測定方法はいわゆる直流四端子法で測定している。測定用プローブから隣接する外部リード間(ICチップ上のパッドが短絡した対を選択)に一定電流を流し、プローブ間の電圧が測定される。電気抵抗は外部リード100対(200ピン)について、放置前と放置後に電気抵抗測定を行い電気抵抗の上昇率が20%以上となるものを不良とした。良否判定は各サンプルの不良率が50%に達するまでの時間が長いものを良好とした。時間が200時間以上であれば実用上の大きな問題はないと判断して◎印、150時間以上200時間未満であれば○印、100時間以上〜150時間未満である場合に△印、100時間未満である場合に×印で表記した。
これらの結果を表3に示す。
接合強度性評価は、上記のアルミニウム(Al-0.5%Cu)電極膜は使用せずに、ワイヤ両端を4μmの銀(Ag)メッキした200℃のリードフレーム(材質は42アロイ、膜厚は150μm)上にボール/ステッチ接合した。3920本のワイヤをボンディングし、不圧着回数が0〜1本を◎、2〜3本を○、4〜20本を△、21本以上を×とした。
これらの結果を表4に示す。
軸上偏芯評価は、(株)K&S社製の超音波熱圧着ワイヤボンダ「MAXμm Ultra(商品名)」を使用しLoop ParameterをFAB Modeとして連続的にFABを作成して評価を実施した。ボンディングは、厚み4μmの銀(Ag)メッキした200℃のリードフレーム上へ連続ボンディングし、アルミニウム(Al-0.5%Cu)電極膜は使用しなかった。なお、その他のワイヤボンディングに関する設定値は、上記のアルミニウム(Al-0.5%Cu)電極膜のダメージ評価と同様に行なった。判定は、接合前の溶融ボール形状を200個観察して、軸上偏芯と寸法精度が良好であるか等を判定した。ワイヤに対するボール位置の芯ずれが5nm以上ある個数を測定し、芯ずれが1個以下である場合は、ボール形成は良好であるため◎印、2〜4個であれば実用上の大きな問題はないと判断して○印、5〜9個である場合に△印、10個以上である場合に×印で表記した。
これらの結果を表5に示す。
また、比較例2は熱処理温度が高すぎるため混在層の厚さが本発明範囲を大きく超えて肥大し、効果が得られていない。
即ち、混在層の厚さが決定的であり、また水素添加効果が大きいことが解る。
Claims (14)
- 銅(Cu)または銅合金からなる芯材、純度99質量%以上のパラジウム(Pd)からなる中間被覆層からなる表面被覆された線径が10〜25μmのボールボンディング用被覆銅ワイヤにおいて、
最上層として、純度99.9質量%以上の金(Au)層が水素含有雰囲気中で熱処理されることにより、上記中間層から該金(Au)層中にパラジウム(Pd)が熱成長して該金(Au)層表面に露出すると共に該パラジウム(Pd)が水素拡散処理された、
走査電子顕微鏡観察による断面の平均厚さが5nm以下の金(Au)−パラジウム(Pd)混在層を形成していることを特徴とするボールボンディング用被覆銅ワイヤ。 - 上記混在層断面の平均厚さが3nm以下であることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記混在層断面の平均厚さが1nm以下であることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記パラジウム(Pd)が湿式メッキされた請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記混在層が強伸線加工された金(Au)およびパラジウム(Pd)が被覆された銅ワイヤに対して、ストランスキー・クラスタノフ成長を利用して、金(Au)の被覆層中にパラジウム(Pd)を3次元成長させ、金(Au)とパラジウム(Pd)が入り乱れた混在層を形成させるものである請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記混在層が強伸線加工された金(Au)およびパラジウム(Pd)が被覆された銅ワイヤに対して450℃〜700℃の水素含有不活性雰囲気下で行われたものである請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記金(Au)が室温でマグネトロンスパッタされたものである請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 中間被覆層が湿式メッキされたパラジウム(Pd)である請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記芯材の銅(Cu)が純度99.999質量%以上の銅(Cu)であることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記芯材の銅(Cu)が純度99.9999質量%以上の銅(Cu)であることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記芯材の銅合金が0.1〜500質量ppmリン(P)および残部銅(Cu)からなることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記芯材の銅合金が0.5〜99質量ppmのジルコニウム(Zr)、スズ(Sn)、バナジウム(V)、ホウ素(B)およびチタン(Ti)のうちの少なくとも1種を総量で0.5〜99質量ppm含み、および残部が純度99.9質量%以上の銅(Cu)からなることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記芯材の銅合金が0.5〜99質量ppmのジルコニウム(Zr)、スズ(Sn)、バナジウム(V)、ホウ素(B)およびチタン(Ti)のうちの少なくとも1種を総量で0.5〜99質量ppm、と0.1〜500質量ppmリン(P)とを含み、および残部が純度99.9質量%以上の銅(Cu)からなることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
- 上記芯材の銅合金が0.5〜99質量ppmのジルコニウム(Zr)、スズ(Sn)、バナジウム(V)、ホウ素(B)およびチタン(Ti)のうちの少なくとも1種を総量で0.5〜99質量ppm、と1〜80質量ppmリン(P)とを含み、および残部が純度99.9質量%以上の銅(Cu)からなることを特徴とする請求項1に記載のボールボンディング用被覆銅ワイヤ。
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| SG (1) | SG191711A1 (ja) |
| TW (1) | TWI395823B (ja) |
| WO (1) | WO2013094482A1 (ja) |
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| CN115178599A (zh) * | 2022-07-12 | 2022-10-14 | 广东省科学院佛山产业技术研究院有限公司 | 铝钯双金属丝及其制备方法、应用 |
| US11749634B2 (en) | 2020-01-07 | 2023-09-05 | Kioxia Corporation | Semiconductor device and wire bonding method |
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| JP5576004B1 (ja) * | 2014-01-30 | 2014-08-20 | 千住金属工業株式会社 | OSP処理Cuボール、はんだ継手、フォームはんだ、およびはんだペースト |
| WO2015141485A1 (ja) * | 2014-03-17 | 2015-09-24 | 日立金属株式会社 | 触媒用Pd粒子および触媒用Pd粉体、触媒用Pd粒子の製造方法 |
| SG10201408302QA (en) * | 2014-12-11 | 2016-07-28 | Heraeus Materials Singapore Pte Ltd | COATED COPPER (Cu) WIRE FOR BONDING APPLICATIONS |
| MY160982A (en) * | 2015-02-26 | 2017-03-31 | Nippon Micrometal Corp | Bonding wire for semiconductor device |
| JP6256616B2 (ja) | 2015-04-22 | 2018-01-10 | 日立金属株式会社 | 金属粒子およびその製造方法、被覆金属粒子、金属粉体 |
| WO2016189752A1 (ja) * | 2015-05-26 | 2016-12-01 | 日鉄住金マイクロメタル株式会社 | 半導体装置用ボンディングワイヤ |
| DE112015007265B4 (de) * | 2015-05-26 | 2025-06-05 | Nippon Micrometal Corporation | Bonddraht für Halbleitervorrichtung |
| US10137534B2 (en) | 2015-06-15 | 2018-11-27 | Nippon Micrometal Corporation | Bonding wire for semiconductor device |
| EP3136435B1 (en) | 2015-07-23 | 2022-08-31 | Nippon Micrometal Corporation | Bonding wire for semiconductor device |
| DE112015004682B4 (de) * | 2015-08-12 | 2020-07-30 | Nippon Micrometal Corporation | Bonddraht für Halbleitervorrichtung |
| CN105132735A (zh) * | 2015-08-22 | 2015-12-09 | 汕头市骏码凯撒有限公司 | 一种微电子封装用超细铜合金键合丝及其制备方法 |
| JP6002299B1 (ja) * | 2015-08-28 | 2016-10-05 | 田中電子工業株式会社 | ボールボンディング用金(Au)分散銅ワイヤ |
| JP6002300B1 (ja) * | 2015-09-02 | 2016-10-05 | 田中電子工業株式会社 | ボールボンディング用パラジウム(Pd)被覆銅ワイヤ |
| JP6047214B1 (ja) * | 2015-11-02 | 2016-12-21 | 田中電子工業株式会社 | ボールボンディング用貴金属被覆銅ワイヤ |
| SG10201600329SA (en) * | 2016-01-15 | 2017-08-30 | Heraeus Materials Singapore Pte Ltd | Coated wire |
| US9799624B1 (en) * | 2016-08-17 | 2017-10-24 | Nanya Technology Corporation | Wire bonding method and wire bonding structure |
| JP6572998B1 (ja) * | 2018-06-12 | 2019-09-11 | 千住金属工業株式会社 | Cu核ボール、はんだ継手、はんだペースト及びフォームはんだ |
| CN109402445B (zh) * | 2018-11-09 | 2021-01-15 | 上海理工大学 | 一种抗氧化铜基合金键合引线及其制备方法 |
| WO2022169407A1 (en) * | 2021-02-05 | 2022-08-11 | Heraeus Materials Singapore Pte. Ltd. | Coated wire |
| DE112022002498T5 (de) * | 2021-06-25 | 2024-02-29 | Nippon Micrometal Corporation | Bonddraht für Halbleitervorrichtungen |
| EP4495982A4 (en) * | 2023-05-30 | 2025-06-18 | Nippon Micrometal Corporation | BOND WIRE |
| WO2024247286A1 (ja) * | 2023-05-30 | 2024-12-05 | 日鉄マイクロメタル株式会社 | ボンディングワイヤ |
| WO2025135010A1 (ja) * | 2023-12-19 | 2025-06-26 | 日鉄マイクロメタル株式会社 | ボンディングワイヤ |
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| JP2011077254A (ja) * | 2009-09-30 | 2011-04-14 | Nippon Steel Materials Co Ltd | 半導体用ボンディングワイヤー |
| JP2012036490A (ja) * | 2010-08-11 | 2012-02-23 | Tanaka Electronics Ind Co Ltd | ボールボンディング用金被覆銅ワイヤ |
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| TW200414453A (en) * | 2002-03-26 | 2004-08-01 | Sumitomo Electric Wintec Inc | Bonding wire and IC device using the bonding wire |
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| CN101834143A (zh) * | 2009-03-10 | 2010-09-15 | 深圳市矽格半导体科技有限公司 | 一种用钯铜线制造集成电路内引线的方法 |
| CN102422404B (zh) * | 2009-07-30 | 2015-08-12 | 新日铁住金高新材料株式会社 | 半导体用接合线 |
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| JP4349641B1 (ja) * | 2009-03-23 | 2009-10-21 | 田中電子工業株式会社 | ボールボンディング用被覆銅ワイヤ |
| JP2011077254A (ja) * | 2009-09-30 | 2011-04-14 | Nippon Steel Materials Co Ltd | 半導体用ボンディングワイヤー |
| JP2012036490A (ja) * | 2010-08-11 | 2012-02-23 | Tanaka Electronics Ind Co Ltd | ボールボンディング用金被覆銅ワイヤ |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11749634B2 (en) | 2020-01-07 | 2023-09-05 | Kioxia Corporation | Semiconductor device and wire bonding method |
| CN115178599A (zh) * | 2022-07-12 | 2022-10-14 | 广东省科学院佛山产业技术研究院有限公司 | 铝钯双金属丝及其制备方法、应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201315821A (zh) | 2013-04-16 |
| TWI395823B (zh) | 2013-05-11 |
| JP2013131654A (ja) | 2013-07-04 |
| WO2013094482A1 (ja) | 2013-06-27 |
| CN103339719B (zh) | 2016-03-16 |
| SG191711A1 (en) | 2013-08-30 |
| CN103339719A (zh) | 2013-10-02 |
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