JP2017050489A - 半導体パッケージおよび半導体パッケージの製造方法 - Google Patents
半導体パッケージおよび半導体パッケージの製造方法 Download PDFInfo
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- JP2017050489A JP2017050489A JP2015174622A JP2015174622A JP2017050489A JP 2017050489 A JP2017050489 A JP 2017050489A JP 2015174622 A JP2015174622 A JP 2015174622A JP 2015174622 A JP2015174622 A JP 2015174622A JP 2017050489 A JP2017050489 A JP 2017050489A
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- metal plate
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 120
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 104
- 239000002184 metal Substances 0.000 claims abstract description 104
- 238000000034 method Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 description 18
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 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
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
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Abstract
【解決手段】第1金属板1と、半導体チップ10と、第2金属板2と、を有する半導体パッケージにおいて、半導体チップ10の第1電極は、第1接続部を介して第1面を有する第1金属板1と接続する。第2金属板2は、第2面S2および第3面S3を有し、第2面S2および第3面S3は、第1面に平行な第1方向と交差する。第3面S3は、第2面S2の反対側に設ける。第2面S2に、第2方向に延びる第1凹部41を形成し、第3面S3に、第2方向に延びる第2凹部42を形成する。第2金属板2は、第2接続部を介して半導体チップ10の第2電極12と接続する。
【選択図】図1
Description
前記第1金属板は、第1面を有する。
前記半導体チップは、前記第1面の上に設けられている。前記半導体チップは、第1電極および第2電極を有する。前記半導体チップの前記第1電極は、第1接続部を介して前記第1金属板と接続されている。
前記第2金属板は、第2面および第3面を有する。前記第2面は、前記第1面に平行な第1方向と交差する。前記第3面は、前記第2面の反対側に設けられている。前記第3面は、前記第1方向と交差する。前記第2面には、前記第2面と平行であり前記第1面と交差する第2方向に延びる前記第1凹部が形成されている。前記第3面には、前記第2方向に延びる第2凹部が形成されている。前記第2金属板は、前記半導体チップの上に設けられている。前記第2金属板は、第2接続部を介して前記第2電極と接続されている。
なお、図面は模式的または概念的なものであり、各部分の厚みと幅との関係、部分間の大きさの比率などは、必ずしも現実のものと同一とは限らない。また、同じ部分を表す場合であっても、図面により互いの寸法や比率が異なって表される場合もある。
また、本願明細書と各図において、既に説明したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。
各実施形態の説明には、XYZ直交座標系を用いる。第1金属板1が有する第1面S1に平行であり、互いに直交する2方向をX方向(第3方向)およびY方向(第1方向)とする。そして、X方向およびY方向に対して垂直な方向をZ方向(第2方向)とする。
図1は、実施形態に係る半導体パッケージ100の平面図である。
図2(a)は、図1のA−A´断面図であり、図2(b)は、図1のB−B´断面図である。
なお、図1では、半導体パッケージ100の内部構造の説明のために、封止部5の一部が省略されている。
図1および図2(b)に表すように、金属部材3は、半導体チップ10の上に、第2金属板2と離間して設けられている。金属部材3は、第3接続部33を介して第3電極13と接続されている。
第3リード端子23は、第5接続部35を介して金属部材3と接続され、X方向に延びている。
図1および図2に表す例に限らず、第2金属板2と第2リード端子22は一体に形成されていてもよく、金属部材3と第3リード端子23も一体に形成されていてもよい。また、第2リード端子22および第3リード端子23は、第1リード端子21が延びている方向と異なる方向に延びていてもよい。
また、第1リード端子21、第2リード端子22、および第3リード端子23のそれぞれは、途中で屈曲した部分を有していてもよい。
図1に表すように、第2金属板2は、互いに対向する第2面S2および第3面S3を有する。第2面S2および第3面S3は、Y方向と交差し、X方向およびZ方向に沿う面である。
第1凹部41〜第3凹部43は、封止部5で充填されている。
すなわち、第2金属板2は、封止部5を透過させてZ方向から半導体パッケージ100を見た場合、第1凹部41〜第3凹部43を通して半導体チップ10の上面が見えるように構成されている。
第1金属板1、第2金属板2、金属部材3、および第1リード端子21〜第3リード端子23は、銅などの金属を含む。
半導体チップ10は、シリコン、炭化シリコン、窒化ガリウム、またはガリウムヒ素を主成分とする半導体素子を含む。
第1電極11〜第3電極13は、アルミニウムなどの金属材料を含む。
第1接続部31〜第5接続部35は、はんだ材料を含む。
封止部5は、エポキシ樹脂などの絶縁性樹脂を含む。
図3〜図6は、実施形態に係る半導体パッケージ100の製造工程を表す工程平面図である。
第2金属板2を配した後は、第1凹部41〜第3凹部43を通して、複数の個所で半導体チップ10の位置を測定する。
続いて、第2金属板2の上面が露出するまで、封止部5の上面を研削する。その後、図6に表す破線の位置でフレームを切断することで、図1および図2に表す半導体パッケージ100が得られる。
半導体パッケージ100において熱の発生と冷却が繰り返された場合、厚みが薄い部分で亀裂が生じやすい。これは、特に、各金属板および半導体チップ10との接触面積が大きい第1接続部31および第2接続部32において顕著である。これらの接続部で亀裂が生じると、導電性が低下するために、半導体パッケージの動作不良が起こる可能性がある。
このため、接続部の厚みを測定し、接続部において局所的に薄い部分が存在しないか検査することが望ましい。一方で、放熱性を高めるために、第1金属板1の面積および第2金属板2の面積を大きくすると、接続部がこれらの金属板の間に隠れてしまい、接続部の厚みの測定が困難となる。
第1凹部41および第2凹部42を通して、少なくとも2か所の半導体チップ10の上面の位置を測定することで、半導体チップ10の傾きを求めることができる。半導体チップ10の傾きを求めることで、第1接続部31の厚みおよび第2接続部32の厚みの各点の厚みを推定することができる。
すなわち、本実施形態によれば、第2金属板2に、第1凹部41および第2凹部42が形成されていることで、接続部の厚みを調べることが容易となる。
従って、半導体パッケージが金属部材3を有する場合、第1凹部41および第2凹部42の少なくともいずれかが形成されていれば、第1接続部31の厚みおよび第2接続部32の厚みを調べることが可能となる。また、第1凹部41および第2凹部42の両方が形成されていれば、半導体チップ10のX−Z面内における傾きと、Y−Z面内における傾きと、を求めることが可能である。
本実施形態はこの例に限らず、半導体チップ10が、ダイオードなどの2つの電極を有する場合についても適用可能である。この場合、半導体チップ10は、第3電極を有していなくても良く、半導体パッケージ100は、金属部材3および第3リード端子23を有していなくても良い。
また、第2金属板2には、第1凹部41〜第3凹部43に加えて、さらに他の凹部が形成されていてもよい。
図7(a)は、実施形態の変形例に係る半導体パッケージの一部を表す平面図であり、図7(b)は、実施形態の変形例に係る半導体パッケージの一部を表す背面図である。
図7では、第2面S2に設けられた第1凹部41近傍を拡大した様子が表されている。また、図7(a)では、第2部分2bの一部を破線で表している。
このため、第1部分2aにおいて第1凹部41の内側に設けられる封止部5の体積は、第2部分2bにおいて第1凹部41の内側に設けられる封止部5の体積よりも大きい。また、第2部分2bの一部は、Z方向において、封止部5の一部と他の一部との間に位置している。
Claims (14)
- 第1面を有する第1金属板と、
前記第1面の上に設けられ、第1電極および第2電極を有し、前記第1電極が第1接続部を介して前記第1金属板と接続された半導体チップと、
前記第1面に平行な第1方向と交差する第2面と、前記第2面の反対側に設けられ、前記第1方向と交差する第3面と、を有し、前記第2面には、前記第2面と平行であり前記第1面と交差する第2方向に延びる第1凹部が形成され、前記第3面には、前記第2方向に延びる第2凹部が形成され、前記半導体チップの上に設けられ、第2接続部を介して前記第2電極と接続された第2金属板と、
を備えた半導体パッケージ。 - 前記第1凹部は、前記第2面の前記第2方向における一端から他端に亘って形成され、
前記第2凹部は、前記第3面の前記第2方向における一端から他端に亘って形成された請求項1記載の半導体パッケージ。 - 前記第1凹部の一部および前記第2凹部の一部は、前記第2方向において前記半導体チップと並ぶ請求項2記載の半導体パッケージ。
- 前記第1凹部の前記一部および前記第2凹部の前記一部は、前記第2方向において前記半導体チップの角部と並ぶ請求項3記載の半導体パッケージ。
- 前記第1凹部および前記第2凹部は、前記第2方向において前記第2接続部と並ばない請求項3または4に記載の半導体パッケージ。
- 前記第3面には、第3凹部がさらに形成され、
前記第3凹部は、前記第3面の前記第2方向における一端から他端に亘って形成された請求項2〜5のいずれか1つに記載の半導体パッケージ。 - 前記半導体チップは、第3電極をさらに有し、
前記第2電極および前記第3電極は、前記第1電極と反対側に設けられ、
前記第2電極と前記第3電極は、互いに離間して設けられた請求項1〜6のいずれか1つに記載の半導体パッケージ。 - 前記第3電極の上に設けられ、前記第3電極と接続された金属部材をさらに備え、
前記金属部材は、前記第1方向と、前記第1面に平行であり前記第1方向に対して垂直な第3方向と、において、前記第2金属板と離間して設けられた請求項7記載の半導体パッケージ。 - 前記2金属板は、
第1部分と、
前記第1方向において前記第1部分と前記半導体チップとの間に位置する第2部分と、
を有し、
前記第1部分に形成された前記第1凹部の、前記第1方向に対して垂直であり前記第2面に沿う第3方向における長さは、前記第2部分に形成された前記第1凹部の前記第3方向における長さよりも長い請求項1〜8のいずれか1つに記載の半導体パッケージ。 - 前記第2方向は、前記第1面に対して垂直である請求項1〜9のいずれか1つに記載の半導体パッケージ。
- 第1金属板の第1面の上に、第1接続部を介して半導体チップを配する工程と、
前記第1面に平行な第1方向と交差する第2面と、前記第2面の反対側に設けられ、前記第1方向と交差する第3面と、を有し、前記第2面には、前記第2面と平行であり前記第1面と交差する第2方向に延びる第1凹部が形成され、前記第3面には、前記第2方向に延びる第2凹部が形成された第2金属板を、前記半導体チップの上に第2接続部を介して配する工程と、
を備えた半導体パッケージの製造方法。 - 前記第2金属板を配する工程において、前記第1凹部の一部および前記第2凹部の一部を、前記第2方向において前記半導体チップと並ぶように、前記第2金属板を配する請求項11記載の半導体パッケージの製造方法。
- 前記第2金属板を配する工程において、前記第1凹部の前記一部および前記第2凹部の前記一部を、前記第2方向において前記半導体チップの角部と並ぶように、前記第2金属板を配する請求項12記載の半導体パッケージの製造方法。
- 前記第1凹部および前記第2凹部を通して、複数の箇所における前記半導体チップの前記第1方向における位置を測定する工程をさらに備えた請求項11〜13のいずれか1つに記載の半導体パッケージの製造方法。
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US10727151B2 (en) * | 2017-05-25 | 2020-07-28 | Infineon Technologies Ag | Semiconductor chip package having a cooling surface and method of manufacturing a semiconductor package |
US11211353B2 (en) * | 2019-07-09 | 2021-12-28 | Infineon Technologies Ag | Clips for semiconductor packages |
KR102556121B1 (ko) * | 2019-08-27 | 2023-07-14 | 미쓰비시덴키 가부시키가이샤 | 반도체 장치 |
EP3905324A1 (en) * | 2020-05-01 | 2021-11-03 | Nexperia B.V. | A semiconductor device and a method of manufacture |
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