JP2019153752A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2019153752A JP2019153752A JP2018039925A JP2018039925A JP2019153752A JP 2019153752 A JP2019153752 A JP 2019153752A JP 2018039925 A JP2018039925 A JP 2018039925A JP 2018039925 A JP2018039925 A JP 2018039925A JP 2019153752 A JP2019153752 A JP 2019153752A
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- signal terminal
- terminal
- solder
- sealing body
- semiconductor element
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1305—Bipolar Junction Transistor [BJT]
- H01L2924/13055—Insulated gate bipolar transistor [IGBT]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1306—Field-effect transistor [FET]
- H01L2924/13091—Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/35—Mechanical effects
- H01L2924/351—Thermal stress
Abstract
Description
前述したように、第1上側放熱板22の下面22bには、はんだ層23を取り囲むように、はんだ吸収溝22dが設けられている。このはんだ吸収溝22dにより、第1導体スペーサ24と第1上側放熱板22とをはんだ付けする際に、余剰なはんだは収容され、意図しない範囲まではんだが濡れ広がることが防止される。しかしながら、余剰となるはんだの量には個体差が存在するので、例えば余剰なはんだの量が比較的に少ないときは、はんだ吸収溝22dの一部の区間にだけ、余剰なはんだが収容される。この場合、はんだ層23の周縁の一部は、はんだ吸収溝22dの内部に位置し、他の一部は、はんだ吸収溝22dの外部に位置することになり、両者の間ではんだの接触角(はんだのフィレット形状)が大きく相違し得る。
前述したように、第1上側放熱板22の第1継手部22cと、第2下側放熱板46の第2継手部46cとは、はんだ層50を介して互いに接合されている。そして、第1上側放熱板22の第1継手部22cには、はんだ層50を取り囲むようにはんだ吸収溝22eが設けられている。第1上側放熱板22の第1継手部22cと第2下側放熱板46の第2継手部46cとが互いにはんだ付けされるときに、溶融したはんだの表面張力に起因して、二つの継手部22c、46cの間に吸着力が作用する。ここで、第1上側放熱板22の第1継手部22cは、第1上側放熱板22の重心から離れて位置するので、第1継手部22cに作用する吸着力は、第1上側放熱板22の位置や姿勢を変化させやすい。第2下側放熱板46についても同様である。このように、二つの部材が互いにはんだ付けされるときに、溶融したはんだの表面張力に起因する吸着力が、少なくとも一方の部材において重心から離れた位置に作用すると、二つの部材の相対的な位置や姿勢が変化しやすく、製品の寸法精度が低下するおそれがある。
本実施例の半導体装置10では、第2上側放熱板42に、第2導体スペーサ44とN端子15とがそれぞれはんだ付けされている。図16は、第2上側放熱板42を平面視した図であり、第2上側放熱板42の第4はんだ接合エリアS4と第5はんだ接合エリアS5とを示している。第4はんだ接合エリアS4とは、第2導体スペーサ44がはんだ付けされた範囲であって、第2導体スペーサ44との間に位置するはんだ層43が接触する範囲である。第5はんだ接合エリアS5とは、N端子15がはんだ付けされた範囲であって、N端子15との間に位置するはんだ層60が接触する範囲である。ここで、第2上側放熱板42の重心42gは、平面視において、第4はんだ接合エリアS4と第5はんだ接合エリアS5とを結ぶ範囲S6内に位置する。この範囲S6は、第4はんだ接合エリアS4と第5はんだ接合エリアS5との間に位置する範囲であって、第4はんだ接合エリアS4及び第5はんだ接合エリアS5を含まないものとする。
本実施例の半導体装置10は、前述したように、吊り端子13、17を備える(図5参照)。また、封止体12には、吊り端子13、17に隣接して、凹部12e、12fが設けられている。半導体装置10が動作して、半導体素子20、40が発熱すると、封止体12は熱膨張する。このとき、凹部12e、12fの位置では、応力が局所的に高まりやすく、クラックが生じるおそれがある。
本実施例の半導体装置10では、前述したように、N端子15が、はんだ層60を介して第2上側放熱板42の第3継手部42cに接合されている。即ち、半導体装置10の製造段階では、N端子15と、第2上側放熱板42の第3継手部42cとの間のはんだ付けが実施される。このはんだ付けでは、溶融したはんだ層60が、N端子15や第3継手部42cにおいて、意図せず広範囲に広がることを防止する必要がある。この課題に対して、N端子15には、下記の構成を採用することができる。
12:封止体
14:P端子
15:N端子
16:O端子
18、19:信号端子
18x、19x:信号端子の変位区間
20、40:半導体素子
22、42:上側放熱板
23、25、27、43、45、47、50、60:はんだ層
24、44:導体スペーサ
26、46:下側放熱板
Claims (5)
- 第1半導体素子及び第2半導体素子と、
前記第1半導体素子及び前記第2半導体素子を封止する封止体と、
前記封止体の内外に亘って延びるとともに、前記封止体の内部において前記第1半導体素子に接続された第1信号端子と、
前記封止体の内外に亘って延びるとともに、前記封止体の内部において前記第2半導体素子に接続された第2信号端子と、を備え、
前記第1信号端子と前記第2信号端子は、前記封止体から同一方向に突出しており、
前記第1信号端子は、前記封止体の内部において、前記第1半導体素子へ接近するにつれて前記第2信号端子から離間する区間を有し、
前記第2信号端子は、前記封止体の内部において、前記第2半導体素子へ接近するにつれて前記第1信号端子から離間する区間を有する、
半導体装置。 - 前記第1信号端子と前記第2信号端子の少なくとも一方は、前記封止体の外部において、直線的に延びている、請求項1に記載の半導体装置。
- 前記第1信号端子と前記第2信号端子との少なくとも一方は、前記封止体の内部において、少なくとも二つの屈曲部を含むクランク形状を有する、請求項1又は2に記載の半導体装置。
- 前記第1信号端子と前記第2信号端子は、互いに面対称の形状を有する、請求項1から3のいずれか一項に記載の半導体装置。
- 前記第1信号端子と前記第2信号端子との少なくとも一方は、板状であるとともに、前記封止体の内部において厚み方向に屈曲している、請求項1から4のいずれか一項に記載の半導体装置。
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JP2021177516A (ja) * | 2020-05-08 | 2021-11-11 | アオイ電子株式会社 | 半導体装置 |
US11587921B2 (en) * | 2019-09-30 | 2023-02-21 | Denso Corporation | Semiconductor device |
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KR102163662B1 (ko) * | 2018-12-05 | 2020-10-08 | 현대오트론 주식회사 | 양면 냉각 파워 모듈 및 이의 제조방법 |
JP7201066B2 (ja) * | 2019-02-18 | 2023-01-10 | 富士電機株式会社 | 半導体装置 |
JP7088094B2 (ja) * | 2019-03-19 | 2022-06-21 | 株式会社デンソー | 半導体装置 |
US11348866B2 (en) * | 2020-06-16 | 2022-05-31 | Infineon Technologies Austria Ag | Package and lead frame design for enhanced creepage and clearance |
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