JP2021145083A - 配線構造及び半導体モジュール - Google Patents
配線構造及び半導体モジュール Download PDFInfo
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- JP2021145083A JP2021145083A JP2020043933A JP2020043933A JP2021145083A JP 2021145083 A JP2021145083 A JP 2021145083A JP 2020043933 A JP2020043933 A JP 2020043933A JP 2020043933 A JP2020043933 A JP 2020043933A JP 2021145083 A JP2021145083 A JP 2021145083A
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- joint portion
- joint
- lead frame
- semiconductor chip
- wall
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 158
- 229910052751 metal Inorganic materials 0.000 claims description 64
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- 239000000463 material Substances 0.000 claims description 7
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- 239000004593 Epoxy Substances 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 compound [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
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
(第1の実施形態)
図1は、本発明の第1の実施形態に係る配線構造が適用される半導体モジュール1の構成を示す斜視図である。以下においては、説明の便宜上、図1に示す前後方向、上下方向及び左右方向を半導体モジュール1の前後方向、上下方向及び左右方向として説明するものとする。しかしながら、本明細書上で用いる上下方向は、必ずしも重力方向に限定されない。
接合部51,52の主面と壁部531、532の接合部側の主面がなす角度θ(図1参照)は、90度以上135度以下、好ましくは90度以上120度以下、さらに好ましくは実質的に90度であってよい。角度θが、135度以下であるとワイヤ9を接合部51、52にボンディングする時のツールの干渉を避け、壁部531、532の幅Lc1、Lc2を大きくして連結部53の電気抵抗を小さくすることができ、120度以下であるとリードフレーム5周辺への封止材の充填が容易になり、実質的に90度であると連結部53下側の検査が容易になる。
第2の実施形態に係るリードフレームは、接合部51及びその周辺の構成が異なる点において、第1の実施形態に係るリードフレーム5と相違する。以下、第2の実施形態に係るリードフレームの構成について、第1の実施形態との相違点を中心に説明する。図4は、本発明の第2の実施形態に係るリードフレーム5Aが適用された半導体モジュール1の構成を示す斜視図である。図5は、第2の実施形態に係る半導体モジュール1が有するリードフレーム5Aの周辺の平面図である。図4及び図5において、図1及び図2と共通の構成については、同一の符号を付与して説明を省略する。
第3の実施形態に係るリードフレームは、接合部51の構成が異なる点において、第2の実施形態に係るリードフレーム5と相違する。以下、第3の実施形態に係るリードフレームの構成について、第2の実施形態との相違点を中心に説明する。図9は、本発明の第3の実施形態に係るリードフレーム5Bが適用された半導体モジュール1の構成を示す斜視図である。図10は、第3の実施形態に係る半導体モジュール1が有するリードフレーム5Bの周辺の平面図である。図9及び図10において、図4及び図5と共通の構成については、同一の符号を付与して説明を省略する。
図12は配線構造の変形例を示す。
図12Aの例において、リードフレーム105は、第1の実施形態のリードフレーム5と同様の形状であり、スイッチング素子を含む半導体チップ104tとダイオードを含む半導体チップ104dを電気的に接続する。リードフレーム105は、一対の接合部151、151と、接合部151、151に立設された一対の壁部1531、1532とを含む。一方の接合部151は半導体チップ104tの上面電極に接合され、他方の接合部151は半導体チップ104dの上面電極に接合される。
上記実施の形態に係る配線構造は、半導体チップと、前記半導体チップに対する接続対象とを電気的に接続する配線構造であって、導電部材の一方側に配置され、前記半導体チップに接合される第1接合部と、前記導電部材の他方側に配置され、前記接続対象に接合される第2接合部と、前記第1接合部と前記第2接合部とを連結する連結部と、を有し、前記連結部は、前記第1接合部及び前記第2接合部の主面と交差する壁部で構成され、当該壁部が前記第1接合部の一部と前記第2接合部の一部とを連結する。この構成によれば、第1接合部の一部と第2接合部の一部が、第1接合部及び第2接合部の主面と交差する壁部で連結されることから、連結部が、第1接合部及び第2接合部よりも上方側の位置を第1接合部及び第2接合部と略平行に延在して配置されることがない。このため、側面視にて、連結部を構成する壁部と重複する空間を利用してボンディングワイヤを引き回すことができる。この結果、ボンディングワイヤを低い位置に配置することができるので、半導体モジュールの低背化を実現することができる。
2、2a、2b:電極パターン
3 :絶縁基板
4 :半導体チップ
5、5A、5B :リードフレーム
6 :金属基板
7 :樹脂ケース
8 :金属端子
9 :ボンディングワイヤ
10 :樹脂ケース
41 :エミッタ電極
41a :切欠き部
42 :補助エミッタ電極
43 :アノード電極
44 :カソード電極
45 :ゲート電極
46 :電流センス電極
47 :ゲートランナー
48 :温度センスダイオード
49、49a、49b:センサ配線
50、50A、50B:金属板
51 :接合部
51a :主面
51b、51c:接合部
51d :スリット
51e、51f:接合部
51g :スリット
52 :接合部
52a :主面
52b :凸部
53 :連結部
531 :壁部
531a、531b:開口部
532 :壁部
532a、532b:開口部
54 :補助連結部
54a :開口部
Claims (9)
- 半導体チップと、前記半導体チップに対する接続対象とを電気的に接続する導電部材と、を備える配線構造であって、
前記導電部材は、
前記導電部材の一方側に配置され、前記半導体チップに接合される第1接合部と、
前記導電部材の他方側に配置され、前記接続対象に接合される第2接合部と、
前記第1接合部及び前記第2接合部の主面と交差する壁部で構成され、前記壁部が前記第1接合部の一部と前記第2接合部の一部とを連結する連結部と、を有する、
配線構造。 - 前記壁部の下端側に、前記第1接合部と前記第2接合部との間で前記第1接合部及び前記第2接合部側に開口した開口部が形成されている請求項1に記載の配線構造。
- 前記第1接合部及び前記第2接合部を含む前記導電部材の材料となる金属板に曲げ加工を施すことで、前記開口部を有する前記壁部を形成する請求項2に記載の配線構造。
- 前記第1接合部は、前記半導体チップ上に設けられる温度センサ、センサ配線及びゲート配線の少なくとも1つに対応する位置にスリットを有する請求項1から請求項3のいずれかに記載の配線構造。
- 前記スリットにより分割された前記第1接合部の部分同士を連結する補助連結部を有する請求項4に記載の配線構造。
- 前記第1接合部及び前記第2接合部の少なくとも一方の下面に高さ調整用の凸部を有する請求項1から請求項5のいずれかに記載の配線構造。
- 前記壁部の幅は、前記第1接合部の幅または前記第2接合部の幅以上である請求項1から請求項6のいずれかに記載の配線構造。
- 前記壁部の幅は、前記第1接合部と前記壁部の交線の長さまたは前記第2接合部と前記壁部の交線の長さ以上である請求項7に記載の配線構造。
- 請求項1から請求項8のいずれかに記載の配線構造を有する半導体モジュール。
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