JP6808849B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6808849B2 JP6808849B2 JP2019549781A JP2019549781A JP6808849B2 JP 6808849 B2 JP6808849 B2 JP 6808849B2 JP 2019549781 A JP2019549781 A JP 2019549781A JP 2019549781 A JP2019549781 A JP 2019549781A JP 6808849 B2 JP6808849 B2 JP 6808849B2
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- lead frame
- terminal
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- semiconductor element
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- 239000004065 semiconductor Substances 0.000 title claims description 114
- 239000000463 material Substances 0.000 claims description 69
- 238000007789 sealing Methods 0.000 claims description 43
- 239000000758 substrate Substances 0.000 claims description 37
- 239000004020 conductor Substances 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 description 21
- 238000000034 method Methods 0.000 description 16
- 238000001514 detection method Methods 0.000 description 15
- 238000005452 bending Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005304 joining Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups H01L21/18 - H01L21/326 or H10D48/04 - H10D48/07
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- Condensed Matter Physics & Semiconductors (AREA)
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- Geometry (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Lead Frames For Integrated Circuits (AREA)
Description
上面に第1の導電層が設けられた基板と、
前記基板の前記上面に配置された半導体素子であって、下面に設けられ且つ前記第1の導電層に電気的に接続された第1の端子と、上面に設けられ且つ制御用信号が入力される第2の端子と、を有する半導体素子Sと、
前記基板及び半導体素子を封止する封止部と、
一端部が前記封止部内で前記半導体素子の前記第2の端子の上面に接触し、他端部が前記封止部から露出しているリードフレームと、
前記半導体素子の前記第2の端子の上面と前記リードフレームの前記一端部との間を接合し且つ導電性を有する制御用導電性接合材と、を備え、
前記リードフレームの前記一端部は、基準部と、前記基準部に繋がり且つ前記基準部よりも前記一端部の先端側に位置する中間部と、前記中間部に繋がり且つ前記一端部の先端に位置するとともに、前記中間部から下方に傾斜した形状を有する傾斜部と、を含み、
前記傾斜部及び前記中間部の上下方向の厚さは、前記基準部の上下方向の厚さよりも、薄い
ことを特徴とする。
前記第2の端子の上面は、長方形の形状を有し、前記傾斜部は、少なくとも前記第2の端子の上面の中心上に位置するとともに、前記傾斜部の下面と前記第2の端子の上面の前記中心との間に前記制御用導電性接合材が位置して、前記傾斜部の下面と前記第2の端子の上面との間が前記制御用導電性接合材により接合されている
ことを特徴とする。
前記傾斜部の先端と前記第2の端子の上面とは、前記第2の端子の上面の中心からずれた前記第2の端子の上面の第1の辺の近傍の領域で、前記第1の辺と平行な方向に線接触している
ことを特徴とする。
前記制御用導電性接合材は、前記第2の端子の上面のうち、少なくとも前記傾斜部の先端と前記第2の端子とが接触している前記第1の辺の近傍の領域から、前記第2の端子の上面の前記中心上を介して、前記第1の辺に対向する第2の辺の近傍の領域に亘って、連続して設けられている
ことを特徴とする。
前記傾斜部の上下方向の厚さは、前記中間部の上下方向の厚さと、同じであることを特徴とする。
前記傾斜部の幅は、前記基準部の幅よりも、小さいことを特徴とする。
前記中間部は、前記中間部の幅が前記基準部から前記傾斜部に向かって狭くなるように、形成されている
ことを特徴とする。
前記半導体素子は、前記第1の端子がドレイン端子であり、前記第2の端子がゲート端子であり、上面に前記第2の端子よりも面積が大きい第3の端子であるソース端子が設けられたMOSFETである
ことを特徴とする。
前記リードフレームは、前記MOSFETを制御するための前記制御用信号が入力される制御用リードフレームであり、
前記半導体装置は、
一端部が前記封止部内の前記基板の前記上面の辺方向A1に延在する端部で前記第1の導電層の上面に接触し、他端部が前記封止部から露出しているドレイン用リードフレームと、
前記基板の前記端部で前記第1の導電層の上面と前記ドレイン用リードフレームの前記一端部の下面側との間を接合し且つ導電性を有する第1の導電性接合材と、をさらに備え、
前記制御用リードフレームの上下方向の厚さは、前記ドレイン用リードフレームの上下方向の厚さと、同じである
ことを特徴とする。
前記制御用リードフレームの前記一端部の幅は、前記第1のリードフレームの前記一端部の幅よりも、小さい
ことを特徴とする。
前記第1のリードフレームの前記一端部と前記他端部とは、同じ厚さを有することを特徴とする。
前記制御用導電性接合材及び前記第1の導電性接合材は、同じはんだ材であることを特徴とする。
前記第1の導電性接合材は、前記第1のリードフレームの第1の曲げ部が前記第1の導電層の上面と線接触する基準方向に沿って配置され、前記基板の前記端部で前記第1の導電層の上面と前記第1の曲げ部の下面側との間を接合している
ことを特徴とする。
前記第1のリードフレームは、前記一端部と前記他端部との間に位置し且つ前記封止部内に封止された本体部を有する
ことを特徴とする。
上面に第1の導電層が設けられた基板を準備する工程と、
下面に設けられ且つ前記第1の導電層に電気的に接続される第1の端子と、上面に設けられ且つ制御用信号が入力される第2の端子と、を有する半導体素子Sを、前記基板の前記上面に配置する工程と、
リードフレームの一端部を前記半導体素子の前記第2の端子の上面に接触させる工程と、
前記半導体素子の前記第2の端子の上面と前記リードフレームの前記一端部との間を、導電性を有する制御用導電性接合材で接合する工程と、
前記基板、半導体素子、及び、前記リードフレームの一端部を、封止部により封止する工程と、
を備え、
前記リードフレームの前記一端部は、基準部と、前記基準部に繋がり且つ前記基準部よりも前記一端部の先端側に位置する中間部と、前記中間部に繋がり且つ前記一端部の先端に位置するとともに、前記中間部から下方に傾斜した形状を有する傾斜部と、を含み、
前記傾斜部及び前記中間部の上下方向の厚さは、前記基準部の上下方向の厚さよりも、薄い
ことを特徴とする。
B 基板
S 半導体素子
200 封止部
L1 第1のリードフレーム
L11 検出用リードフレーム
H1 第1の導電性接合材
L2 第2のリードフレーム
HG 制御用導電性接合材
L3 第3のリードフレーム
L31 検出用リードフレーム
Claims (4)
- 基板と、
前記基板上に実装された半導体素子と、
前記半導体素子の制御用電極に導電性接合材を介して接続された制御用リード端子と、
前記基板及び前記半導体素子を封止する封止部とを備え、
前記制御用リード端子は、前記封止部から外部に突出して延びる基端部と、前記基端部に繋がって前記封止部内に配置される中間部と、前記中間部の端部から前記中間部に対して斜めに延びる傾斜部とを有し、
前記中間部における前記傾斜部側の部分と前記傾斜部は、前記基端部よりも厚みが薄くなっており、
前記傾斜部の先端が前記制御用電極の表面における端部側の位置に接触し、前記制御用電極の表面に配置された導電性接合材が、前記傾斜部の前記制御用電極と対向する面のみに接合した状態で、前記制御用リード端子が前記制御用電極に接続される半導体装置。 - 前記中間部は、前記中間部の中途位置から前記傾斜部に向かって徐々に幅が細くなっている請求項1に記載の半導体装置。
- 前記半導体素子は、前記基板上の導体層に接続された第1電極と、前記制御用電極と並んで設けられた第3電極とを有し、
前記基板上の導体層に導電性接合材を介して接続された第1リード端子と、
前記第3電極に導電性接合材を介して接続された第3リード端子とを備える請求項1又は2に記載の半導体装置。 - 前記半導体素子は、前記第1電極がドレイン電極であり、前記制御用電極がゲート電極であり、前記第3電極がソース電極であるMOSFETである請求項3に記載の半導体装置。
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