JP6663763B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6663763B2 JP6663763B2 JP2016059545A JP2016059545A JP6663763B2 JP 6663763 B2 JP6663763 B2 JP 6663763B2 JP 2016059545 A JP2016059545 A JP 2016059545A JP 2016059545 A JP2016059545 A JP 2016059545A JP 6663763 B2 JP6663763 B2 JP 6663763B2
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- 239000004065 semiconductor Substances 0.000 title claims description 83
- 239000010410 layer Substances 0.000 claims description 129
- 239000011229 interlayer Substances 0.000 claims description 34
- 239000000758 substrate Substances 0.000 claims description 22
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000004048 modification Effects 0.000 description 27
- 238000012986 modification Methods 0.000 description 27
- 230000004888 barrier function Effects 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000002184 metal Substances 0.000 description 19
- 229910002601 GaN Inorganic materials 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 230000005533 two-dimensional electron gas Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Description
<半導体装置の構成>
本実施の形態による半導体装置の第1構成例および第2構成例について、図1および図2を用いてそれぞれ説明する。
図1は、本実施の形態による半導体装置の第1構成例を示す平面図である。
図2は、本実施の形態による半導体装置の第2構成例を示す平面図である。
本実施の形態による半導体装置の実装構成例について、図3を用いて説明する。図3は、本実施の形態による半導体装置の実装構成を示す平面図である。
本実施の形態による半導体装置が有するゲートバス配線のレイアウトについて、図4を用いて説明する。図4は、本実施の形態によるトランジスタユニットが有するパワートランジスタの構成を示す平面図である。
本実施の形態による半導体装置が有するゲートバス配線のレイアウトの第1変形例について、図5を用いて説明する。図5は、本実施の形態によるトランジスタユニットが有するパワートランジスタの構成の第1変形例を示す平面図である。
本実施の形態による半導体装置が有するゲートバス配線のレイアウトの第2変形例について、図6を用いて説明する。図6は、本実施の形態によるトランジスタユニットが有するパワートランジスタの構成の第2変形例を示す平面図である。
本実施の形態による半導体装置が有するゲートバス配線のレイアウトの第3変形例について、図7を用いて説明する。図7は、本実施の形態によるトランジスタユニットが有するパワートランジスタの構成の第3変形例を示す平面図である。
本実施の形態による半導体装置のデバイス構造について、図8および図9を用いて説明する。図8は、本実施の形態によるパワートランジスタを示す断面図であり、図4のA−A´線における断面図である。図9は、本実施の形態によるパワートランジスタを示す断面図であり、図4のB−B´線における断面図である。本実施の形態では、ノーマリオフ型のパワートランジスタについて説明する。
本実施の形態による半導体装置のデバイス構造の第1変形例について、図10を用いて説明する。図10は、本実施の形態によるパワートランジスタの第1変形例を示す断面図であり、図4のB−B´線における断面図である。
本実施の形態による半導体装置のデバイス構造の第2変形例について、図11を用いて説明する。図11は、本実施の形態によるパワートランジスタの第2変形例を示す断面図であり、図4のB−B´線における断面図である。
本実施の形態による半導体装置のスイッチング動作について、図1に示した8個のトランジスタユニットからなる半導体装置を例に説明する。
BL1,BL2,BL3 バリアメタル層
BU バッファ層
CH チャネル層
CN 接続孔
CN1 第1接続孔
CN2 第2接続孔
CN3 第3接続孔
DBL ドレインバス配線
DE ドレイン電極
DT ドレイン端子(ドレインピン)
GBL1 ゲート接続配線
GBL2 ゲートバス配線
GE ゲート電極
GGE パッド電極
GT ゲート端子(ゲートピン)
HD 保持部材
IL1 第1層間絶縁膜
IL2 第2層間絶縁膜
IN1,IN2 絶縁膜
M1 第1層目の配線層
M2 第2層目の配線層
M3 第3層目の配線層
OD ドレイン電極用開口部
OP 開口部
OS ソース電極用開口部
P1 ゲートバス配線の第1部分
P2 ゲートバス配線の第2部分
PA パッシベーション膜
PE プラグ電極
SB 基板
SBL ソースバス配線
SD,SD1,SD2 半導体装置
SE ソース電極
ST ソース端子(ソースピン)
SUB 半導体基板
TR 溝
TU トランジスタユニット
UA1,UA2,UA3,UA4 トランジスタユニット
UB1,UB2,UB3,UB4 トランジスタユニット
W1,W2,W3 ワイヤ
Claims (10)
- 基板の主面上に、平面視において第1方向に互いに離間して設けられたソースバス配線およびドレインバス配線と、
前記ソースバス配線と前記ドレインバス配線との間に設けられたトランジスタユニットと、
前記トランジスタユニットにおいて、前記第1方向に延在し、平面視において前記第1方向と直交する第2方向に互いに離間して設けられた複数のゲート電極と、
複数の前記ゲート電極と電気的に接続されたゲートバス配線と、
を有し、
複数の前記ゲート電極は、第1配線層で形成され、
前記ソースバス配線および前記ドレインバス配線は、前記第1配線層より上層の第2配線層で形成され、
前記トランジスタユニットを覆うように、前記ゲートバス配線は、前記第2配線層より上層の第3配線層で形成され、
前記トランジスタユニットにおいて、前記第2配線層で形成され、前記第1方向に延在し、前記第2方向に互いに離間して設けられた複数のソース電極と、
前記トランジスタユニットにおいて、前記第2配線層で形成され、前記第1方向に延在し、前記第2方向に互いに離間して設けられた複数のドレイン電極と、
前記第1配線層で形成され、前記第2方向に延在するゲート接続配線と、
をさらに有し、
前記ソース電極と前記ドレイン電極とは前記第2方向に交互に設けられ、
前記ソース電極が前記基板に接続する部分と、前記ドレイン電極が前記基板に接続する部分との間に、前記ゲート電極が配置され、
複数の前記ソース電極の前記第1方向の一方の端部が、前記ソースバス配線でつながり、
複数の前記ドレイン電極の前記第1方向の一方の端部が、前記ドレインバス配線でつながり、
複数の前記ゲート電極の前記第1方向の一方の端部が、前記ゲート接続配線でつながり、
前記ゲート接続配線の上方に前記ゲートバス配線が位置し、
前記ゲート接続配線と前記ゲートバス配線との間に前記ソース電極の一部が位置し、
前記ゲート接続配線と前記ゲートバス配線とは、前記ソース電極を貫通する接続部を介して電気的に接続される、半導体装置。 - 請求項1記載の半導体装置において、
前記接続部は、
前記ゲート接続配線と前記ゲートバス配線との間に形成された層間絶縁膜と、
前記層間絶縁膜を貫通する接続孔と、
前記接続孔に埋め込まれたプラグ電極と、
を有する、半導体装置。 - 請求項1記載の半導体装置において、
前記接続部は、
前記ゲート接続配線と前記ゲートバス配線との間に前記第2配線層からなるパッド電極、
を有し、
前記ゲート接続配線と前記ゲートバス配線とは、前記パッド電極を介して電気的に接続される、半導体装置。 - 請求項1記載の半導体装置において、
前記ゲートバス配線の前記第1方向の幅は、前記ゲート接続配線の前記第1方向の幅よりも大きい、半導体装置。 - 基板の主面上に、平面視において第1方向に互いに離間して設けられたソースバス配線およびドレインバス配線と、
前記ソースバス配線と前記ドレインバス配線との間に設けられたトランジスタユニットと、
前記トランジスタユニットにおいて、前記第1方向に延在し、平面視において前記第1方向と直交する第2方向に互いに離間して設けられた複数のゲート電極と、
複数の前記ゲート電極と電気的に接続されたゲートバス配線と、
を有し、
複数の前記ゲート電極は、第1配線層で形成され、
前記ソースバス配線および前記ドレインバス配線は、前記第1配線層より上層の第2配線層で形成され、
前記トランジスタユニットを覆うように、前記ゲートバス配線は、前記第2配線層より上層の第3配線層で形成され、
前記トランジスタユニットにおいて、前記第2配線層で形成され、前記第1方向に延在し、前記第2方向に互いに離間して設けられた複数のソース電極と、
前記トランジスタユニットにおいて、前記第2配線層で形成され、前記第1方向に延在し、前記第2方向に互いに離間して設けられた複数のドレイン電極と、
をさらに有し、
前記ソース電極と前記ドレイン電極とは前記第2方向に交互に設けられ、
前記ソース電極が前記基板に接続する部分と、前記ドレイン電極が前記基板に接続する部分との間に、前記ゲート電極が配置され、
複数の前記ソース電極の前記第1方向の一方の端部が、前記ソースバス配線でつながり、
複数の前記ドレイン電極の前記第1方向の一方の端部が、前記ドレインバス配線でつながり、
前記ソース電極の前記第2方向の両側にそれぞれ位置する前記ゲート電極の前記第1方向の一方の端部が、ゲート接続配線でつながり、
前記ゲート接続配線の上方に前記ゲートバス配線が位置し、
前記ゲート接続配線と前記ゲートバス配線との間に前記ソース電極の一部が位置し、
前記ゲート接続配線と前記ゲートバス配線とは、前記ソース電極を貫通する接続部を介して電気的に接続される、半導体装置。 - 請求項5記載の半導体装置において、
前記接続部は、
前記ゲート接続配線と前記ゲートバス配線との間に形成された層間絶縁膜と、
前記層間絶縁膜を貫通する接続孔と、
前記接続孔に埋め込まれたプラグ電極と、
を有する、半導体装置。 - 請求項5記載の半導体装置において、
前記接続部は、前記ゲート接続配線と前記ゲートバス配線との間に前記第2配線層からなるパッド電極を有し、
前記ゲート接続配線と前記ゲートバス配線とは、前記パッド電極を介して電気的に接続される、半導体装置。 - 請求項1記載の半導体装置において、
平面視において、前記ゲートバス配線は、前記トランジスタユニットの一部と重なっている、半導体装置。 - 請求項1記載の半導体装置において、
前記ゲートバス配線は、
前記第1方向に延在する第1部分と、
前記第1部分の両側にそれぞれ前記第2方向に延在する第2部分と、
を有し、
前記第2部分が、前記ゲート接続配線の上方に位置する、半導体装置。 - 請求項1記載の半導体装置において、
前記ソースバス配線に対してボンディングされた第1ワイヤと、
前記ドレインバス配線に対してボンディングされた第2ワイヤと、
前記ゲートバス配線に対してボンディングされた第3ワイヤと、
を有する、半導体装置。
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