JP3988777B2 - 表面実装用の半導体パッケージおよびその製造方法 - Google Patents
表面実装用の半導体パッケージおよびその製造方法 Download PDFInfo
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- JP3988777B2 JP3988777B2 JP2005220635A JP2005220635A JP3988777B2 JP 3988777 B2 JP3988777 B2 JP 3988777B2 JP 2005220635 A JP2005220635 A JP 2005220635A JP 2005220635 A JP2005220635 A JP 2005220635A JP 3988777 B2 JP3988777 B2 JP 3988777B2
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- 239000004065 semiconductor Substances 0.000 title claims description 83
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 239000000758 substrate Substances 0.000 claims description 84
- 238000000034 method Methods 0.000 claims description 52
- 238000009713 electroplating Methods 0.000 claims description 35
- 239000011347 resin Substances 0.000 claims description 32
- 229920005989 resin Polymers 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 34
- 239000010931 gold Substances 0.000 description 34
- 229910052737 gold Inorganic materials 0.000 description 34
- 238000007747 plating Methods 0.000 description 30
- 239000000654 additive Substances 0.000 description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 gold ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
図8は、この製造方法の概略を示すものである。この方法では、まず、1つ分のパッケージに対応する電極パターンが複数並んで形成された集合基板100を製造し、この集合基板100上に半導体チップ11,12をダイボンディングする(図8(1))。つぎに、各半導体チップ11,12を集合基板100上の電極パターンにワイヤボンディングし(図8(2))、その上方を樹脂封止する(図8(3))。なお、図8(2)の13は、ワイヤボンディング用のワイヤ(以下、「ボンディングワイヤ」という。)を、図8(3)の104は封止樹脂を、それぞれ示す。
まずプリント基板200側の電極(図示せず。)にクリームはんだ201を印刷する工程が実行され(図9(1))、その上に前記半導体パッケージ1やその他の一般部品106を実装する工程が実行される(図9(2))。
たとえば下記の特許文献2には、電解メッキ処理により基板の電極パターン上にニッケルによる被膜を形成し、さらにその上に金による被膜を形成したところ、ワイヤボンディングの密着性の向上が認められたことが記載されている。
さらに、後記する製造方法により両面の電極パターン全体に電解メッキ処理による金属被膜が形成されるので、ワイヤボンディングの強度も確保することが可能になる。
第1ステップでは、半導体パッケージの大きさに対応する領域が複数設定された基板の一方の面に、領域間が電気的に独立した電極パターンを、各領域の端縁から離して形成するとともに、他方の面に、隣り合う領域間にまたがる電解メッキ用の引き出しパターンを介して各領域が電気的に接続された電極パターンを形成し、かつ前記基板の厚み部分に、当該基板を挟んで対向関係にある各面の電極パターンを電気的に接続する接続経路を領域毎に形成する。第2ステップでは、前記第1ステップの処理が施された基板の電解メッキ用の引き出しパターンに所定電圧を印加して電解メッキ処理を実行することにより、各面の電極パターンに金属被膜を形成する。第3ステップでは、前記第2ステップの処理が施された基板の前記電解メッキ用の引き出しパターンが形成されていない方の面の電極パターンに、半導体チップをワイヤボンディングする。第4ステップでは、前記基板の第3ステップの処理対象とした面を樹脂により封止する。第5ステップでは、前記第4ステップの処理が施された基板を領域単位に切り分ける。
上記した第1〜5の各ステップを一連に実行することにより、前記したこの発明にかかる半導体パッケージを製作することが可能になる。
ステップAでは、前記第2ステップの処理が施された基板の前記引き出しパターンが形成されていない方の面(半導体チップの搭載面)を撮像する。たとえば、前記半導体チップの搭載面を上にした状態の基板を平坦面上に設置し、その上方にカメラを配置して基板を撮像することができる。
また電解メッキ処理が適切に行われている場合には、前記基板の厚み部分の接続経路の導通がとれていると考えられるので、第3ステップの処理に進んでも差し支えないと考えることができる。前記接続経路は、電解メッキ処理のためのみならず、半導体チップとプリント基板との接続にも関与するからである。
この実施例の半導体パッケージ1は、両面に電極パターン15,18が形成された基板の一方の面に複数の半導体チップ11,12が実装され、その実装面が透明樹脂14により封止されている。なお、図1では、基板の各面の構成を明確に表すために、封止樹脂14を一点鎖線にし、前記半導体チップの実装面10Aを上方に向けた状態(図1(1))と、前記実装面10Aを下方に向けた状態(図1(2))とを、それぞれ示している。
裏面100Bには、前記した領域r間を接続する引き出し線16や領域4の境界線19が形成される。いずれも電極パターン18と同様の材料による導電性パターンである。また、領域間の引き出し線16は境界線19に直交するように形成されている。さらに、領域r内の電極パターン18は、いずれかの引き出し線16または境界線19に接続されている。よって領域r内の電極パターン18は、直接または間接的に引き出し線16に接続された状態にある。
なお、裏面10Bは樹脂封止されることなく、そのままプリント基板に取り付けられるが、プリント基板側の前記引き出し線16に接触する部分には電極は形成されておらず、クリームはんだも塗布されないので、パッケージ1が適切に実装されていれば、接続不良などの問題が生じることはない。
なお、カバー体32には透明の窓部33が設けられている。この窓部33の形成位置は、上記の組立完了後には、前記基板2上の半導体パッケージ1内のフォトICに対向するように調整されている。
さらにこれらの方法ではスルーホール17の導通状態を確認できても、電解金メッキ処理の適否まで確認することはできない。
10 基板
10A,100A チップ実装面
10B,100B 裏面
11,12 半導体チップ
15,18 電極パターン
16 引き出し線
17 スルーホール
19 輪郭線
100 集合基板
r 領域
Claims (4)
- 両面にそれぞれ電極パターンが形成された基板の一方の面に半導体チップがワイヤボンディングされ、この半導体チップが実装された面が樹脂により封止されている表面実装用の半導体パッケージにおいて、
前記基板の樹脂封止されていない面には、接続用の電極パターンと、この電極パターンに連続して当該基板の端縁まで延びる電解メッキ用の引き出しパターンとが形成される一方、前記基板の樹脂封止された面には電解メッキ用の引き出しパターンが形成されずに、ワイヤボンディング用の電極パターンが基板の端縁から離れかつ前記樹脂により封止された範囲内に含まれるように形成されており、
前記基板の厚み部分には、当該基板を挟んで対向関係にある各面の電極パターンを電気的に接続する接続経路が形成されており、各面の電極パターンに電解メッキ処理による金属被膜が形成されていることを特徴とする表面実装用の半導体パッケージ。 - 前記半導体チップの実装面は透光性を有する樹脂により封止されている請求項1に記載された表面実装用の半導体パッケージ。
- 半導体パッケージの大きさに対応する領域が複数設定された基板の一方の面に、領域間が電気的に独立した電極パターンを、各領域の端縁から離して形成するとともに、他方の面に、隣り合う領域間にまたがる電解メッキ用の引き出しパターンを介して各領域が電気的に接続された電極パターンを形成し、かつ前記基板の厚み部分に、当該基板を挟んで対向関係にある各面の電極パターンを電気的に接続する接続経路を領域毎に形成する第1ステップと、
前記第1ステップの処理が施された基板の電解メッキ用の引き出しパターンに所定電圧を印加して電解メッキ処理を実行することにより、各面の電極パターンに金属被膜を形成する第2ステップと、
前記第2ステップの処理が施された基板の前記電解メッキ用の引き出しパターンが形成されていない方の面の電極パターンに、半導体チップをワイヤボンディングする第3ステップと、
前記基板の第3ステップの処理対象とした面を樹脂により封止する第4ステップと、
前記第4ステップの処理が施された基板を領域単位に切り分ける第5ステップとを、実行する表面実装用の半導体パッケージの製造方法。 - 請求項3に記載された方法において、
前記第2ステップが終了してから第3ステップを実行するまでの間に、前記第2ステップの処理が施された基板の前記引き出しパターンが形成されていない方の面を撮像するステップA;前記ステップAで生成された画像から金属製被膜に対応する色彩を抽出するステップB;ステップBの抽出結果から電解メッキ処理の適否を判別するステップC;の各ステップを実行する表面実装用の半導体パッケージの製造方法。
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CN2006101076323A CN1905181B (zh) | 2005-07-29 | 2006-07-28 | 用于表面安装的半导体封装结构及其制造方法 |
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