JP2022032542A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP2022032542A JP2022032542A JP2020136408A JP2020136408A JP2022032542A JP 2022032542 A JP2022032542 A JP 2022032542A JP 2020136408 A JP2020136408 A JP 2020136408A JP 2020136408 A JP2020136408 A JP 2020136408A JP 2022032542 A JP2022032542 A JP 2022032542A
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- Prior art keywords
- electrode
- layer
- resistance
- semiconductor device
- semiconductor
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- H01L23/18—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device
- H01L23/24—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device solid or gel at the normal operating temperature of the device
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Abstract
Description
第1実施形態に係る半導体装置は、図1に示すように、ケース部材8と、ケース部材8の内側に配置された絶縁回路基板1と、絶縁回路基板1上に搭載されたスイッチング素子である半導体素子(半導体チップ)3a~3hと、絶縁回路基板1上に搭載された抵抗素子(抵抗チップ)4とを備える。なお、図1では、ボンディングワイヤ5a~5vのボンディング地点を黒い丸で模式的に示している。
第1実施形態の第1変形例に係る抵抗素子4は、図8に示すように、半導体基板41がシリコン(Si)基板ではなく、炭化ケイ素(SiC)等の化合物半導体基板からなる点と、下面電極49が3層構造である点が、図4に示した第1実施形態に係る抵抗素子4と異なる。
第1実施形態の第2変形例に係る抵抗素子4は、図9に示すように、2つの上面電極45e,45fを有する点が、図4に示した第1実施形態に係る抵抗素子4と異なる。上面電極45e,45fの保護膜47の開口部47a,47bからの露出部分がそれぞれ電極パッドとなる。
第1実施形態の第3変形例に係る抵抗素子4は、図11に示すように、抵抗層43bの代わりにpn接合ダイオード(43c,43d)を有する点が、図9に示した第1実施形態の第2変形例に係る抵抗素子4と異なる。pn接合ダイオード(43c,43d)は、第1絶縁膜42上に配置されたn型の半導体層43cと、第1絶縁膜42上に配置され、n型の半導体層43cに接して設けられたp型の半導体層43dにより構成されている。n型の半導体層43cは、コンタクト領域46dを介して中継配線45gに接続されている。p型の半導体層43dは、コンタクト領域46cを介して上面電極45fに接続されている。
第1実施形態の第4変形例に係る半導体装置は、図13に示すように。温度センサとして使用する抵抗素子4が、補助ソース端子7eと半導体素子3a~3dのそれぞれのソース電極とを電気的に接続する中継地点である上側導体層11gの上面に搭載されている点が、図1に示した第1実施形態に係る半導体装置と異なる。
第2実施形態に係る半導体装置は、図14に示すように、絶縁回路基板1上に複数(8つ)の抵抗素子4a~4hが搭載されており、複数の抵抗素子4a~4hのそれぞれを、半導体素子3a~3hのそれぞれのソース電極に接続される抵抗(ソース抵抗)として使用する点が、図1に示した第1実施形態に係る半導体装置と異なる。
第2実施形態の第1変形例に係る半導体装置は、図19に示すように、2つの抵抗素子4a,4eが無く、6つの抵抗素子4b~4d,4f~4gを備える点が、図14に示した第2実施形態に係る半導体装置と異なる。抵抗素子4b~4d,4f~4gの構成及び配置位置は、図14に示した第2実施形態に係る半導体装置と共通する。
第2実施形態の第2変形例に係る半導体装置は、図21に示すように、半導体素子3a~3dに対応する2つの抵抗素子4a,4bと、半導体素子3e~3fに対応する2つの抵抗素子4e,4fを備える点が、図14に示した第2実施形態に係る半導体装置と異なる。
第2実施形態の第3変形例に係る半導体装置は、図22に示すように、8つの抵抗素子4a~4hを備える点は、図14に示した第2実施形態に係る半導体装置と共通する。しかし、抵抗素子4aが、半導体素子3aのソース抵抗としての機能と共に、温度センサの機能を有する点が、図14に示した第2実施形態に係る半導体装置と異なる。他方、抵抗素子4b~4dは、半導体素子3b~3dのソース抵抗としてのみ機能する。
第2実施形態の第4変形例に係る半導体装置は、図22に示した第2実施形態の第3変形例に係る半導体装置と平面レイアウトが共通し、抵抗素子4aが、半導体素子3aのソース抵抗としての機能と共に、温度センサの機能を有する点も、第2実施形態の第3変形例に係る半導体装置と共通する。しかし、第2実施形態の第4変形例に係る半導体装置は、抵抗素子4aの種類が、他の抵抗素子4b~4hと異なる種類である点が、第2実施形態の第3変形例に係る半導体装置と異なる。
上記のように、本発明は第1及び第2実施形態によって記載したが、この開示の一部をなす論述及び図面は本発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなろう。
2a,2b…接合材
3a~3h…半導体素子(半導体チップ)
4,4a~4h…抵抗素子(抵抗チップ)
5a~5v…ボンディングワイヤ
6a~6h…配線
7a…補助正極端子
7b,7c…温度検出端子
7d,7e…制御端子
7f,7g…補助ソース端子
8…ケース部材
8a…正極端子
8b…負極端子
8c…出力端子
9…封止部材
10…絶縁基板
11a~11i…上側導体層(回路層)
12…下側導体層(放熱層)
30…半導体基板
31…第1主電極(ドレイン電極)
31a…第1電極層
31b…第2電極層
31c…第3電極層
32…第2主電極(ソース電極)
33…ゲート電極(ゲート電極)
41…半導体基板
43a,43b…抵抗層
43c,43d…半導体層
45a,45e,45f…上面電極
45b,45c,45g…中継配線
45d…ガードリング層
46a~46h…コンタクト領域
47…保護膜(パッシベーション膜)
47a,47b…開口部
49…下面電極
49a…第1電極層
49b…第2電極層
49c…第3電極層
49d…第4電極層
81…段差部
82…側壁部
D1~D4…還流ダイオード
D11…ダイオード
L1~L4…寄生インダクタンス
R1~R6,R11~R13…抵抗
T1~T4…トランジスタ
T11~T3…端子
Claims (14)
- 絶縁回路基板と、
前記絶縁回路基板の第1導体層の上面に第1接合材を介して接合された第1主電極と、前記第1主電極の上面に設けられた半導体基板と、前記半導体基板の上面に設けられた第2主電極とを有する半導体素子と、
前記絶縁回路基板の第2導体層の上面に第2接合材を介して接合された下面電極と、前記下面電極に一端が電気的に接続された抵抗層と、前記抵抗層の他端に電気的に接続された第1上面電極と、を有する抵抗素子と、
を備え、
前記第1主電極が、前記第1接合材に接合された第1接合層を有し、
前記下面電極が、前記第2接合材に接合された第2接合層を有し、
前記第1接合層及び前記第2接合層が同一構造を有することを特徴とする半導体装置。 - 前記半導体基板が、炭化ケイ素又はシリコンで構成されることを特徴とする請求項1に記載の半導体装置。
- 前記抵抗素子が、シリコン又は炭化ケイ素からなる半導体基板を有することを特徴とする請求項1又は2に記載の半導体装置。
- 前記第1接合層及び前記第2接合層のそれぞれが、
金からなる第1電極層と、
前記第1電極層の上面に設けられ、ニッケル又はニッケルを主成分とする合金からなる第2電極層と、
を有することを特徴とする請求項1~3のいずれか1項に記載の半導体装置。 - 前記第1接合材及び前記第2接合材がはんだからなることを特徴とする請求項1~4のいずれか1項に記載の半導体装置。
- 前記抵抗素子が温度センサとして使用されることを特徴とする請求項1~5のいずれか1項に記載の半導体装置。
- 前記第1上面電極が、第1温度検出端子に電気的に接続され、
前記下面電極が、第2温度検出端子に電気的に接続されている
ことを特徴とする請求項6に記載の半導体装置。 - 前記第2主電極が、補助ソース端子に電気的に接続され、
前記第1上面電極が、温度検出端子に電気的に接続され、
前記下面電極が、前記補助ソース端子に電気的に接続されている
ことを特徴とする請求項6に記載の半導体装置。 - 前記抵抗素子が前記半導体素子のソース抵抗として使用されることを特徴とする請求項1~5のいずれか1項に記載の半導体装置。
- 前記第2主電極が、前記第1上面電極に電気的に接続され、
前記下面電極が、補助ソース端子に電気的に接続されている
ことを特徴とする請求項9に記載の半導体装置。 - 前記抵抗素子が、温度センサとして使用され、且つ前記半導体素子のソース抵抗として使用されることを特徴とする請求項1~5のいずれか1項に記載の半導体装置。
- 前記抵抗素子が、
前記下面電極にカソードが電気的に接続されたダイオードと、
前記ダイオードのアノードに電気的に接続された第2上面電極と、
を更に有することを特徴とする請求項11に記載の半導体装置。 - 絶縁回路基板と、
前記絶縁回路基板の第1導体層の上面に第1接合材を介して接合された第1主電極と、前記第1主電極の上面に設けられた半導体基板と、前記半導体基板の上面に設けられた第2主電極とを有する半導体素子と、
前記絶縁回路基板の第2導体層の上面に第2接合材を介して接合された下面電極と、前記下面電極に一端が電気的に接続された抵抗層と、前記抵抗層の他端に電気的に接続された第1上面電極と、を有する抵抗素子と、
を備え、
前記第2主電極が、補助ソース端子に電気的に接続され、
前記第1上面電極が、温度検出端子に電気的に接続され、
前記下面電極が前記補助ソース端子に電気的に接続されている
ことを特徴とする半導体装置。 - 絶縁回路基板と、
前記絶縁回路基板の第1導体層の上面に第1接合材を介して接合された第1主電極と、前記第1主電極の上面に設けられた半導体基板と、前記半導体基板の上面に設けられた第2主電極とを有する半導体素子と、
前記絶縁回路基板の第2導体層の上面に第2接合材を介して接合された下面電極と、前記下面電極に一端が電気的に接続された抵抗層と、前記抵抗層の他端に電気的に接続された第1上面電極と、を有する抵抗素子と、
を備え、
前記抵抗素子が、
前記下面電極にカソードまたはアノードが電気的に接続されたダイオードと、
前記ダイオードのアノードまたはカソードに電気的に接続された第2上面電極と、
を1チップに有することを特徴とする半導体装置。
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