JP2005209899A - 中継部材、及び中継部材を用いたマルチチップパッケージ - Google Patents
中継部材、及び中継部材を用いたマルチチップパッケージ Download PDFInfo
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- JP2005209899A JP2005209899A JP2004015131A JP2004015131A JP2005209899A JP 2005209899 A JP2005209899 A JP 2005209899A JP 2004015131 A JP2004015131 A JP 2004015131A JP 2004015131 A JP2004015131 A JP 2004015131A JP 2005209899 A JP2005209899 A JP 2005209899A
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- semiconductor chip
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- 239000004065 semiconductor Substances 0.000 claims abstract description 74
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000002161 passivation Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
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Abstract
【解決手段】 表面に複数の第1のパッドが形成された第1の半導体チップ上に第2の半導体チップ及び中継部材を搭載し、第1の半導体チップ、第2の半導体チップ、及び中継部材を封止する樹脂封止体を備えると共に、第2の半導体チップは、中央部に配置された複数の第2のパッドを備え、中継部材は、第1の中継パッド、第2の中継パッド、及び第1の中継パッドと第2の中継パッドとを接続する連結部を備え、第2の半導体チップの第2のパッドからの電気的接続は、接続端子へ接続される場合と第1の中継パッドを介して第2の中継パッドから接続端子又は第1の半導体チップへ接続される場合とを備えている。
【選択図】 図1
Description
この発明は上記問題を解消するためになされたものであり、センターパッド型の半導体チップを搭載するマルチチップパッケージでありながら、ワイヤ長を短く保ち、高歩留まりを可能とする中継部材、及び中継部材を用いたマルチチップパッケージを提供するものである。
本発明に係る中継部材では、上述した課題を解決すべく、回路機能を有する半導体チップの電気的信号を接続端子に伝達する矩形の中継部材であって、基板上に形成された複数の中継パッドと、隣り合う中継パッドをつなぐパッド連結部とを備えている。
まず、図1及び図2に示すマルチチップパッケージ100の構造を説明する。第1の半導体素子23は、第1の接着剤24によりダイパッド25に接着されている。第1の半導体素子23上には、第2の接着剤26により第2半導体素子27が接着され、第3の接着剤28により中継部材29が接着されている。第1の半導体素子23上には、第1のパッド30が形成されている。また、第2の半導体素子27上の略中央部には、第2のパッド22が形成されている。中継部材29上には、中継パッド2と中継パッド2の間を電気的に接続するパッド連結部3とが形成されている。第2半導体素子27は、第2半導体素子27の端部と第1のパッド30との距離L9が、概ね0.2mm〜1.0mmとなるように第1の半導体素子23に接着する。中継部材29は、第2半導体素子27の端部と中継部材29の端部との距離L10が、概ね0.2mm〜1.0mmとなるように、また、中継部材29の端部と第1のパッドとの距離L11が、概ね0.4mm〜1.0mmとなるように、第1の半導体素子23に接着されている。
ここで、中継部材29は、中継パッド2とパッド連結部3とから構成されていて、回路形成のためのパターニングは施されていない。中継部材29は、第2の半導体素子27からの電気的信号を、第1の半導体素子23の第1のパッド30へバイパスする機能を持っている。また、中継部材29は、第2の半導体素子27と同等か、それ以上の厚さを有する。第1の半導体素子23、第2の半導体素子27、及び中継部材29は、モールド樹脂35により封止される。
中継部材29を搭載したことにより、第2のパッド22から直接第1のパッド30へ電気的接続を取ることがなくなり、第3の金属ワイヤ33を3mm以下に保つことが可能とる。中継部材29の厚さを第2の半導体素子27の厚さと同等かそれ以上としたことで、第3の金属ワイヤ33が第2の半導体素子27の端部へショートすることを防止できる。
また、中継部材1の内周の端部には、組み立て時チップを個片加工する際の切代であるスクライブライン9を有している。本実施例の中継部材1は、中継パッド2及びパッド連結部3以外の配線は存在せず、同然のことながら、回路機能を有することもない。
図6は、図3の本発明の実施例2における中継部材の切り出し時の位置を示す上面図である。図6を参照して、中継部材1の適用方法について説明する。本図ではバッファコート膜8が中継部材1の1辺のみに形成されている場合を例としている。必要なサイズが決定すると、スクライブ位置10が決定する。スクライブ位置10はバッファコート膜8がある辺の端部を基準とし、必要なサイズが得られる位置の近傍で切断する。中継部材1の短辺方向の切断に関しては、中継部材1の長辺方向において隣り合う中継パッド2の間を切断する。中継部材1の長辺方向に関しては、パッド連結部3の中央近傍を切断する。なお、切断は従来のチップ切り出し工程であるスクライブ工程にて実施される。
さらに、パッド連結部3の幅L2を互いに連結された中継パッド2の間隔L3より小さくしたことにより、スクライブ工程にて切り出した際に発生するパッド連結部3の切りくずの長さが、互いに連結された中継パッド2の間隔L3より短くなる。L5−L1≧L2である。よって、切りくずによる中継部材1の長辺方向に隣り合う中継パッド2間のショートを防止することができる。
さらに、互いに連結された中継パッド2の間隔L3が50um〜100umであり、中継部材1の長辺方向において隣り合う中継パッド2のピッチL5が150um〜200umであることにより、スクライブ工程での切り出しに必要な間隔50umよりも大きく、中継パッド2に触れることなく切り出すことが可能となる。
さらに、バッファコート膜8の端部を基準としてサイズを決定した後に中継部材1を切り出すので、必要に応じて様々なサイズに簡単に変更することが可能となり、汎用性が高くなる。また、バッファコート膜8の切断個所は一箇所のみとなり、切断の方向は中継部材1の短辺方向のみとなる。バッファコート膜8は、スクライブ工程時に切断のダメージにより剥離しやすいという特徴があるが、バッファコート膜8の切断回数及び切断距離を最小に抑えることが可能となるため、バッファコート膜8の剥離を防止することができる。
本発明の実施例2の中継部材1の構成と、本発明の実施例3の中継部材12の構成との異なる点は、サブパッド13及びサブパッド連結部14が追加されたことである。中継部材12の長辺方向において、隣り合うパッド連結部2の間にサブパッド13が形成されている。また、中継部材12の長辺方向において、隣り合うサブパッド13を電気的に接続するサブパッド連結部14が形成されている。中継パッド2及びパッド連結部3の配列と、サブパッド13及びサブパッド連結部14は実質的に垂直に交差している。ただし、中継パッド2及びパッド連結部3の配列と、サブパッド13及びサブパッド連結部14は、別の層で形成されているため、互いにショートはしていない。
また、サブパッド13及びサブパッド連結部14は、中継部材12の短辺方向において、中継パッド2の列に対して、1列置きに配列されている。ただし、必要に応じて、複数列置きにすることも可能で1列置きに限定されるものではない。同様に、図5では、中継部材12の長辺方向において、毎行サブパッド13は配置されているが、サブパッド13は、複数行置きに配置することも可能である。
中継部材12の短辺方向における切り出し位置は、サブパッド13が配置されていない中継パッド2の間とする。また、中継部材12の長辺方向における切り出し位置は、サブパッド13及びサブパッド連結部14が配置されていない中継パッド2の間とする。
上記切り出し位置にすることにより、サブパッド連結部14を切断する回数が最小限に抑えることが可能となり、切りくずによる中継パッド2及びサブチップパッド14の間のショートを防止することが可能となる。
以上のような接続を行うことで、電源ピン15a、15b、及びアドレスピン20の配置を自由に変更することが可能となり、配線の自由度を向上させることができる。
2 中継パッド
3 パッド連結部
4 シリコン基板
5 第1の絶縁膜
6 層間絶縁膜
7 パッシベーション膜
8 バッファコート膜
9 スクライブライン
10 スクライブ位置
11 シリコン露出部
13 サブパッド
14 サブパッド連結部
15a、15b 電源ピン
16、17 パッドワイヤ
18、19 パッド中継ワイヤ
20a、20b アドレスピン
21 リードフレーム端子
22 第2のパッド
23 第1の半導体素子
24 第1の接着剤
25 ダイパッド
26 第2の接着剤
27 第2の半導体素子
28 第3の接着剤
30 第1のパッド
31 第1の金属ワイヤ
32 第2の金属ワイヤ
33 第3の金属ワイヤ
34 第4の金属ワイヤ
35 モールド樹脂
Claims (19)
- 表面に複数の第1のパッドが形成された第1の半導体チップ上に第2の半導体チップ及び中継部材を搭載し、前記第1の半導体チップ、前記第2の半導体チップ、及び前記中継部材を封止する樹脂封止体を備えたマルチチップパッケージであって、
前記第2の半導体チップは、前記第2の半導体チップの中央部に配置された複数の第2のパッドを備え、
前記中継部材は、第1の中継パッド、第2の中継パッド、及び前記第1の中継パッドと第2の中継パッドとを接続する連結部を備え、
前記第2の半導体チップの前記第2のパッドからの電気的接続は、接続端子へ接続される場合と前記第1の中継パッドを介して前記第2の中継パッドから前記接続端子又は前記第1の半導体チップへ接続される場合とを備えたことを特徴とするマルチチップパッケージ。 - 表面に複数の第1のパッドが形成された第1の半導体チップ上に第2の半導体チップ及び中継部材を搭載し、前記第1の半導体チップ、前記第2の半導体チップ、及び前記中継部材を封止する樹脂封止体を備えたマルチチップパッケージであって、
前記第2の半導体チップは、前記第2の半導体チップの中央部に配置された複数の第2のパッドを備え、
前記中継部材は、第1の中継パッド、第2の中継パッド、及び前記第1の中継パッドと第2の中継パッドとを接続する配線を備え、
前記第2のパッドは、接続端子及び前記第1の中継パッドとワイヤボンディングされ、
前記第1のパッド及び前記第2の中継パッドは、前記接続端子とワイヤボンディングされていることを特徴とするマルチチップパッケージ。 - 前記電気的接続は金属ワイヤによるボンディングであり、前記第2のパッドから前記第1の中継パッドへの前記金属ワイヤの長さが3mmを超えないことを特徴とする請求項1に記載のマルチチップパッケージ。
- 前記第2のパッドから前記第2半導体チップの端部までの距離は、前記第2のパッドから直接ボンディングされる前記接続端子と前記第2のパッドの間にある前記第1半導体チップの1辺に配置された前記第1のパッドから前記第2のパッドまでの距離の3/4以上であることを特徴とする請求項1〜3のいずれかに記載のマルチチップパッケージ。
- 前記中継部材はさらに、第1のサブパッドと第2のサブパッドと前記第1及び第2のサブパッド間をつなぐ第2の連結部を備え、前記第1又は第2の中継パッドと前記第1又は第2のサブパッドが電気的に接続されていることを特徴とする請求項1〜4のいずれかに記載のマルチチップパッケージ。
- 回路機能を有する半導体チップの電気的信号を接続端子に伝達する矩形の中継部材であって、
基板上に形成された複数の中継パッドと、
隣り合う前記中継パッドをつなぐパッド連結部とを備えたことを特徴とする中継部材。 - 前記基板は、半導体基板であることを特徴とする請求項6に記載の中継部材。
- 前記中継パッド及び前記パッド連結部は、前記基板上に第1の絶縁膜を介して形成されていることを特徴とする請求項6又は請求項7に記載の中継部材。
- 前記パッド連結部は、同一の方向に形成されていることを特徴とする請求項6〜8のいずれかに記載の中継部材。
- 前記複数の中継パッドと前記複数のパッド連結部が直線状に形成された伝達群は、略並行に複数形成されていることを特徴とする請求項9記載の中継部材。
- 前記第1の絶縁膜上の前記中継パッド及び前記パッド連結部を除く部分には、第2の絶縁膜が形成されるとともに、前記第2の絶縁膜上及び前記パッド連結部上には第1の保護膜が形成されていることを特徴とする請求項7〜10のいずれかに記載の中継部材。
- 前記第1の保護膜は、前記中継パッド上の内周をも覆うことを特徴とする請求項11に記載の中継部材。
- 前記中継部材の内周で、且つ、前記第1の保護膜上には、第2の保護膜が形成されていることを特徴とする請求項11もしくは請求項12のいずれかに記載の中継部材。
- 前記第2の保護膜は、前記中継部材の単一方向にのみ、形成されていることを特徴とする請求項13に記載の中継部材
- 前記第1の保護膜及び前記第2の保護膜は、絶縁膜であることを特徴とする請求項13もしくは請求項14のいずれかに記載の中継部材。
- 前記パッド連結部の幅は、前記パッド連結部に接続された前記中継パッド間の距離よりも短いことを特徴とする請求項6〜請求項15のいずれかに記載の中継部材。
- 隣り合う前記パッド連結部の間に形成された複数のサブパッドと、隣り合う前記サブパッドをつなぐサブパッド連結部を有することを特徴とする請求項6〜請求項16のいずれかに記載の中継部材。
- 前記サブパッドは複数個置きの前記パッド連結部の間に形成されていることを特徴とする請求項17に記載の中継部材。
- 前記中継パッドはマトリクス状に配置されていることを特徴とする請求項6〜18のいずれかに記載の中継部材。
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JP2012222326A (ja) * | 2011-04-14 | 2012-11-12 | Elpida Memory Inc | 半導体装置 |
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JP2002093993A (ja) * | 2000-09-14 | 2002-03-29 | Mitsubishi Electric Corp | リードフレーム及びそれを用いた樹脂封止型半導体装置 |
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US8089142B2 (en) * | 2002-02-13 | 2012-01-03 | Micron Technology, Inc. | Methods and apparatus for a stacked-die interposer |
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US7098528B2 (en) * | 2003-12-22 | 2006-08-29 | Lsi Logic Corporation | Embedded redistribution interposer for footprint compatible chip package conversion |
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