JP6598037B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6598037B2 JP6598037B2 JP2017526185A JP2017526185A JP6598037B2 JP 6598037 B2 JP6598037 B2 JP 6598037B2 JP 2017526185 A JP2017526185 A JP 2017526185A JP 2017526185 A JP2017526185 A JP 2017526185A JP 6598037 B2 JP6598037 B2 JP 6598037B2
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- 239000004065 semiconductor Substances 0.000 title claims description 133
- 230000002457 bidirectional effect Effects 0.000 claims description 67
- 229910044991 metal oxide Inorganic materials 0.000 claims description 33
- 150000004706 metal oxides Chemical class 0.000 claims description 33
- 239000004020 conductor Substances 0.000 claims description 16
- 229910000679 solder Inorganic materials 0.000 description 17
- 238000010586 diagram Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011800 void material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 238000004088 simulation Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 239000000470 constituent Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 238000002161 passivation Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Description
第1の実施形態に係る半導体装置は、CSP型の半導体装置であって、当該半導体装置を2分した第1領域と第2領域とに、第1半導体装置と第2半導体装置とをそれぞれ備えるものである。前記第1半導体装置と前記第2半導体装置とは、電気特性及び実装の信頼性を向上するための後述する配置位置に、それぞれ複数のパッドを有している。
第1の実施形態では、双方向トランジスタ1の具体例を用いて、パッドの配置位置により半導体装置の電気特性及び実装の信頼性を向上する効果を説明したが、当該効果は、双方向トランジスタ1には限定されない。当該効果は、半導体装置の機能に関わらず、パッドの特徴的な配置位置によって達成されるため、双方向トランジスタ以外にも、単方向トランジスタやダイオードなどのCSP型の半導体装置で広く得ることができる。
第3の実施形態では、双方向トランジスタのオン抵抗を低減するための、ソースパッドと活性領域との好適な位置関係について説明する。
図15A、図15Bに示すように、ソースパッド11、21の直下の電流経路に最大量の電流が流れ、ソースパッド11、21から遠い電流経路ほど大きい抵抗のために電流量は減少すると考えられる。そのため、ソースパッドを活性領域19、29の中央に配置したときに、活性領域19、29に流れる電流量の合計が最大(つまり、オン抵抗が最小)となる。
第4の実施形態では、双方向トランジスタのオン抵抗を低減するために有効なチップ形状について説明する。
2 制御IC
3 電池
4 負荷
10、20 トランジスタ
11、11a、11b、11c、21、71、81、91 ソースパッド
12、22、72、82、92 ゲートパッド
13、23 ソース導体
14、24 ソース領域
15、25 ゲート導体
16、26 ゲート絶縁膜
17 ボディコンタクト
18、28 電流制御領域
19、29 活性領域
19a、29a 活性領域の一端領域
19b、29b 活性領域の他端領域
19c、29c 活性領域の分割領域
31 ドレイン導体
32 ドレイン領域
34 層間絶縁層
35 パッシベーション層
41 チップ辺
43 最近接点
44、44a、44b、44c 直線
45 帯状領域
51 第1パッド
52 第2パッド
Claims (20)
- チップサイズパッケージ型の半導体装置であって、
前記半導体装置を2分した第1領域と第2領域とに、縦型の第1金属酸化物半導体トランジスタと縦型の第2金属酸化物半導体トランジスタとがそれぞれ形成され、
前記第1金属酸化物半導体トランジスタは、前記半導体装置の一方主面に設けられた1つ以上の第1ゲートパッドと4つ以上の第1ソースパッドとを有し、前記第1ゲートパッドの各々は、上面視で、4つ以上の前記第1ソースパッドで取り囲まれ、前記第1ゲートパッドと前記第1ソースパッドとの任意の組み合わせについて、前記第1ゲートパッドと前記第1ソースパッドとの最近接点同士が上面視で前記半導体装置の辺に対して傾いた第1直線上にあり、
前記第2金属酸化物半導体トランジスタは、前記半導体装置の前記一方主面に設けられた1つ以上の第2ゲートパッドと4つ以上の第2ソースパッドとを有し、前記第2ゲートパッドの各々は、上面視で、4つ以上の前記第2ソースパッドで取り囲まれ、前記第2ゲートパッドと前記第2ソースパッドとの任意の組み合わせについて、前記第2ゲートパッドと前記第2ソースパッドとの最近接点同士が上面視で前記半導体装置の辺に対して傾いた第2直線上にあり、
前記第1金属酸化物半導体トランジスタのドレインと前記第2金属酸化物半導体トランジスタのドレインとを接続する導体が、前記半導体装置の他方主面に設けられ、
前記第1ゲートパッドの各々、前記第1ソースパッドの各々、前記第2ゲートパッドの各々、および前記第2ソースパッドの各々は、前記半導体装置の外観に露出した、
半導体装置。 - 前記半導体装置は、前記第1ソースパッドと前記第2ソースパッドとの間で双方向に電流が流れる双方向トランジスタである、
請求項1に記載の半導体装置。 - 前記第1領域および前記第2領域に、前記第1金属酸化物半導体トランジスタの第1活性領域および前記第2金属酸化物半導体トランジスタの第2活性領域がそれぞれ設けられ、
前記第1活性領域の、前記第1領域と前記第2領域との境界に直交する方向での一端領域および他端領域の各々に、2つ以上の前記第1ソースパッドが設けられ、
前記第2活性領域の、前記境界に直交する前記方向での一端領域および他端領域の各々に、2つ以上の前記第2ソースパッドが設けられた、
請求項2に記載の半導体装置。 - 前記第1領域および前記第2領域に、前記第1金属酸化物半導体トランジスタの第1活性領域および前記第2金属酸化物半導体トランジスタの第2活性領域がそれぞれ設けられ、
前記第1活性領域を、前記第1領域と前記第2領域との境界に直交する方向に2以上の整数に分割した領域の各々に、2つ以上の前記第1ソースパッドが設けられ、
前記第2活性領域を、前記境界に直交する前記方向に2以上の整数に分割した領域の各々に、2つ以上の前記第2ソースパッドが設けられた、
請求項2に記載の半導体装置。 - 前記半導体装置の前記第1領域と前記第2領域との境界と平行な方向の寸法を、前記境界に直交する方向の寸法で除したアスペクト比が、1より大きい、
請求項2に記載の半導体装置。 - 前記第1ソースパッドの各々および前記第2ソースパッドの各々は、上面視で、幅が一定値以下の帯状領域内に設けられた、
請求項2に記載の半導体装置。 - 前記一定値が250μmである、
請求項6に記載の半導体装置。 - 前記第1ゲートパッドの各々、前記第1ソースパッドの各々、前記第2ゲートパッドの各々、および前記第2ソースパッドの各々は、上面視で、170μm以上かつ250μm以下の幅を有する、
請求項6に記載の半導体装置。 - 上面視において、前記第1ゲートパッドの各々の周囲の4つの各象限に、2つ以上の前記第1ソースパッドが設けられ、
前記第2ゲートパッドの各々の周囲の4つの各象限に、2つ以上の前記第2ソースパッドが設けられた、
請求項6に記載の半導体装置。 - 上面視において、前記第1ゲートパッドの各々の周囲の4つの各象限に、各々の面積が前記第1ゲートパッドの面積よりも大きい1つ以上の前記第1ソースパッドが設けられ、
前記第2ゲートパッドの各々の周囲の4つの各象限に、各々の面積が前記第2ゲートパッドの面積よりも大きい1つ以上の前記第2ソースパッドが設けられた、
請求項6に記載の半導体装置。 - 前記第1ソースパッドの各々および前記第2ソースパッドの各々は、上面視で、前記第1領域と前記第2領域との境界に直交する方向に長い長尺形状に設けられた、
請求項10に記載の半導体装置。 - 前記第1ソースパッドの各々および前記第2ソースパッドの各々は、上面視で、前記第1領域と前記第2領域との境界に平行な方向に長い長尺形状に設けられた、
請求項10に記載の半導体装置。 - 前記境界と平行な方向の寸法を、前記境界に直交する前記方向の寸法で除したアスペクト比が、1より大きい、
請求項3または4に記載の半導体装置。 - 前記第1ソースパッドの各々および前記第2ソースパッドの各々は、上面視で、幅が一定値以下の帯状領域内に設けられた、
請求項3または4に記載の半導体装置。 - 前記一定値が250μmである、
請求項14に記載の半導体装置。 - 前記第1ゲートパッドの各々、前記第1ソースパッドの各々、前記第2ゲートパッドの各々、および前記第2ソースパッドの各々は、上面視で、170μm以上かつ250μm以下の幅を有する、
請求項14に記載の半導体装置。 - 上面視において、前記第1ゲートパッドの各々の周囲の4つの各象限に、2つ以上の前記第1ソースパッドが設けられ、
前記第2ゲートパッドの各々の周囲の4つの各象限に、2つ以上の前記第2ソースパッドが設けられた、
請求項14に記載の半導体装置。 - 上面視において、前記第1ゲートパッドの各々の周囲の4つの各象限に、各々の面積が前記第1ゲートパッドの面積よりも大きい1つ以上の前記第1ソースパッドが設けられ、
前記第2ゲートパッドの各々の周囲の4つの各象限に、各々の面積が前記第2ゲートパッドの面積よりも大きい1つ以上の前記第2ソースパッドが設けられた、
請求項14に記載の半導体装置。 - 前記第1ソースパッドの各々および前記第2ソースパッドの各々は、上面視で、前記境界に直交する前記方向に長い長尺形状に設けられた、
請求項18に記載の半導体装置。 - 前記第1ソースパッドの各々および前記第2ソースパッドの各々は、上面視で、前記境界に平行な方向に長い長尺形状に設けられた、
請求項18に記載の半導体装置。
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