JP6112491B2 - 半導体装置および電力変換装置 - Google Patents
半導体装置および電力変換装置 Download PDFInfo
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- JP6112491B2 JP6112491B2 JP2014512301A JP2014512301A JP6112491B2 JP 6112491 B2 JP6112491 B2 JP 6112491B2 JP 2014512301 A JP2014512301 A JP 2014512301A JP 2014512301 A JP2014512301 A JP 2014512301A JP 6112491 B2 JP6112491 B2 JP 6112491B2
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- 239000004065 semiconductor Substances 0.000 title claims description 183
- 238000006243 chemical reaction Methods 0.000 title claims description 23
- 239000000758 substrate Substances 0.000 claims description 21
- 150000004767 nitrides Chemical class 0.000 claims description 13
- 239000010410 layer Substances 0.000 description 96
- 230000003071 parasitic effect Effects 0.000 description 35
- 238000010586 diagram Methods 0.000 description 15
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 9
- 238000000605 extraction Methods 0.000 description 6
- 229910002601 GaN Inorganic materials 0.000 description 4
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000009467 reduction Effects 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
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910003811 SiGeC Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-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
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 150000001875 compounds Chemical class 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
- 230000006872 improvement Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000005533 two-dimensional electron gas Effects 0.000 description 1
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- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
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- H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
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- H10D30/47—FETs having zero-dimensional [0D], one-dimensional [1D] or two-dimensional [2D] charge carrier gas channels having 2D charge carrier gas channels, e.g. nanoribbon FETs or high electron mobility transistors [HEMT]
- H10D30/471—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT]
- H10D30/475—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT] having wider bandgap layer formed on top of lower bandgap active layer, e.g. undoped barrier HEMTs such as i-AlGaN/GaN HEMTs
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- H10D30/471—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT]
- H10D30/475—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT] having wider bandgap layer formed on top of lower bandgap active layer, e.g. undoped barrier HEMTs such as i-AlGaN/GaN HEMTs
- H10D30/4755—High electron mobility transistors [HEMT] or high hole mobility transistors [HHMT] having wider bandgap layer formed on top of lower bandgap active layer, e.g. undoped barrier HEMTs such as i-AlGaN/GaN HEMTs having wide bandgap charge-carrier supplying layers, e.g. modulation doped HEMTs such as n-AlGaAs/GaAs HEMTs
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- H10D62/85—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group III-V materials, e.g. GaAs
- H10D62/8503—Nitride Group III-V materials, e.g. AlN or GaN
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- H10D64/23—Electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. sources, drains, anodes or cathodes
- H10D64/251—Source or drain electrodes for field-effect devices
- H10D64/257—Source or drain electrodes for field-effect devices for lateral devices wherein the source or drain electrodes are characterised by top-view geometrical layouts, e.g. interdigitated, semi-circular, annular or L-shaped electrodes
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1588—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load comprising at least one synchronous rectifier element
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
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- H10D62/343—Gate regions of field-effect devices having PN junction gates
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Semiconductor Integrated Circuits (AREA)
- Junction Field-Effect Transistors (AREA)
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
- Electrodes Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
図1は、本発明の第1の実施形態に係る半導体装置であるスイッチ装置300Bの構成を示す回路図である。図1のスイッチ装置300Bは、パワー半導体チップ301Bと、それを駆動する駆動回路302と、制御信号源303と、ロジック電源305とを有する。パワー半導体チップ301Bは、ゲート電極Gと、ドレイン電極Dと、ソース電極Sとを持つトランジスタと、ゲート端子200と、ドレイン端子201と、第1のソース端子202Aと、第2のソース端子202Bとを有する。このパワー半導体チップ301Bには、内部配線構造に起因したゲート寄生インダクタンス(Lg)307Aと、ドレイン寄生インダクタンス(Ld)307Bと、ソース寄生インダクタンス(Ls)307Cとが存在する。主電流204が流れる経路はソース寄生インダクタンス307Cを介してパワー半導体チップ301Bの第1のソース端子202Aに接続し、駆動回路302の接地端子はパワー半導体チップ301Bの第2のソース端子202Bへ接続している。
図8は、本発明の第2の実施形態に係る半導体装置であるスイッチ装置300Cの構成を示す回路図である。図8のスイッチ装置300Cは、パワー半導体チップ301Cと、それを駆動する駆動回路302と、制御信号源303と、ロジック電源305とから構成される。第1の実施形態の構成(図1)とは、パワー半導体チップ301Cが異なるのみである。
図10は、本発明の第3の実施形態に係る電力変換装置であるDC/DCコンバータ308Aの構成の一部を示す回路図である。図10のDC/DCコンバータ308Aは、ハイサイドスイッチとローサイドスイッチとが同一基板上に集積されたハーフブリッジ構成のパワー半導体チップ309と、それを駆動する駆動回路302,502と、制御信号源303,503と、ロジック電源305とから構成される。
図13は、本発明の第4の実施形態に係る電力変換装置であるDC/DCコンバータ308Bの構成の一部を示す回路図である。図13のDC/DCコンバータ308Bは、DC/DCコンバータ集積回路チップとして機能するハーフブリッジ構成のパワー半導体チップ311と、制御信号源303,503と、ロジック電源305とから構成される。パワー半導体チップ311は、ハーフブリッジを構成するハイサイドスイッチ310及びローサイドスイッチ510に加えて、それらを駆動する駆動回路302,502が同一基板上に形成されている。
5D,5G,5GR,5S プリント基板配線
6 プリント基板配線
11D ドレイン1層目ビア
11S 第1のソース1層目ビア
12S 第2のソース1層目ビア
21D ドレイン2層目ビア
21S 第1のソース2層目ビア
22S 第2のソース2層目ビア
100 基板
101 半導体層積層体
102 ゲート電極
103 ドレイン電極
104 ソース電極
105 ドレイン1層目引き出し配線
106 第1のソース1層目引き出し配線
107 第2のソース1層目引き出し配線
108 ドレイン2層目引き出し配線
109 第1のソース2層目引き出し配線
110 第2のソース2層目引き出し配線
112 ゲート配線
113 活性領域
114 不活性領域
115 バッファ層
116 第1の層
117 第2の層
120 p型窒化物半導体層
121 絶縁層
200,400 ゲート端子
201,401 ドレイン端子
202,402 ソース端子
202A 第1のソース端子
202B 第2のソース端子
204 主電流
205 プリント基板のドレイン領域
206 プリント基板のソース領域
207A 第1の出力端子
207B 第2の出力端子
208,408 ロジック電源端子
300A,300B,300C スイッチ装置
301A,301B,301C パワー半導体チップ
302,502 駆動回路
303,503 制御信号源
304 入力電源
305 ロジック電源
306 負荷抵抗
307A,507A ゲート寄生インダクタンス(Lg)
307B,507B ドレイン寄生インダクタンス(Ld)
307C,507C ソース寄生インダクタンス(Ls)
308A,308B DC/DCコンバータ
309,311 ハーフブリッジ構成のパワー半導体チップ
310,510 パワー半導体素子(ハイサイドスイッチ、ローサイドスイッチ)
312 ブートストラップコンデンサ
Ids ドレイン電流
Vgs ゲート・ソース間電圧
Vs ソース電圧
Claims (16)
- パワー半導体チップを備えた半導体装置であって、
前記パワー半導体チップは、
基板と、
前記基板の上に形成された半導体層積層体と、
前記半導体層積層体の上に互いに間隔をおいて形成されたソース電極及びドレイン電極と、
前記ソース電極と前記ドレイン電極との間に形成されたゲート電極と、
ドレイン引き出し配線、第1のソース引き出し配線及び第2のソース引き出し配線と、
第1の端子、第2の端子、第3の端子及び第4の端子とを有し、
前記ゲート電極は前記第1の端子に接続され、
前記ドレイン電極と前記第2の端子とは前記ドレイン引き出し配線を通じて互いに接続され、
前記ソース電極と前記第3の端子とは前記第1のソース引き出し配線を通じて互いに接続され、
前記ソース電極と前記第4の端子とは前記第2のソース引き出し配線を通じて互いに接続され、
前記第2の端子と前記第3の端子との間に主電流が流れるように構成され、
前記第2のソース引き出し配線は、前記第1のソース引き出し配線と前記ドレイン引き出し配線との間に形成されたことを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記ドレイン引き出し配線と前記第1のソース引き出し配線と前記第2のソース引き出し配線とは、横串形状又は縦串形状の長配線で形成されたことを特徴とする半導体装置。 - 請求項1又は2に記載の半導体装置において、
前記第2のソース引き出し配線の配線幅は、前記ドレイン引き出し配線又は前記第1のソース引き出し配線の配線幅以下であることを特徴とする半導体装置。 - 請求項1〜3のいずれか1項に記載の半導体装置において、
前記第2のソース引き出し配線と前記第4の端子とは、上層配線で互いに接続されていることを特徴とする半導体装置。 - 請求項1〜4のいずれか1項に記載の半導体装置において、
前記半導体層積層体は、窒化物半導体で構成されていることを特徴とする半導体装置。 - 請求項5記載の半導体装置において、
前記パワー半導体チップは、前記ゲート電極と前記半導体層積層体との間に形成されたp型半導体層を更に有することを特徴とする半導体装置。 - パワー半導体チップを備えた半導体装置であって、
前記パワー半導体チップは、
基板と、
前記基板の上に形成された半導体層積層体と、
前記半導体層積層体の上に互いに間隔をおいて形成されたソース電極及びドレイン電極と、
前記ソース電極と前記ドレイン電極との間に形成されたゲート電極と、
ドレイン引き出し配線、第1のソース引き出し配線及び第2のソース引き出し配線と、
第1の端子、第2の端子、第3の端子及び第4の端子とを有し、
前記ゲート電極は前記第1の端子に接続され、
前記ドレイン電極と前記第2の端子とは前記ドレイン引き出し配線を通じて互いに接続され、
前記ソース電極と前記第3の端子とは前記第1のソース引き出し配線を通じて互いに接続され、
前記ソース電極と前記第4の端子とは前記第2のソース引き出し配線を通じて互いに接続され、
前記第2の端子と前記第3の端子との間に主電流が流れるように構成され、
前記第2のソース引き出し配線と前記第4の端子とは、上層配線で互いに接続されていることを特徴とする半導体装置。 - 請求項7記載の半導体装置において、
前記ドレイン引き出し配線と前記第1のソース引き出し配線と前記第2のソース引き出し配線とは、横串形状又は縦串形状の長配線で形成されたことを特徴とする半導体装置。 - 請求項7又は8に記載の半導体装置において、
前記第2のソース引き出し配線の配線幅は、前記ドレイン引き出し配線又は前記第1のソース引き出し配線の配線幅以下であることを特徴とする半導体装置。 - 請求項7記載の半導体装置において、
前記第2のソース引き出し配線は、前記ソース電極と同層の配線であることを特徴とする半導体装置。 - 請求項7又は10に記載の半導体装置において、
前記第2のソース引き出し配線は、不活性領域上に形成されていることを特徴とする半
導体装置。 - 請求項7、10、11のいずれか1項に記載の半導体装置において、
前記ゲート電極と前記ソース電極とは、それぞれ櫛型に形成されていることを特徴とする半導体装置。 - 請求項7〜12のいずれか1項に記載の半導体装置において、
前記半導体層積層体は、窒化物半導体で構成されていることを特徴とする半導体装置。 - 請求項13記載の半導体装置において、
前記パワー半導体チップは、前記ゲート電極と前記半導体層積層体との間に形成されたp型半導体層を更に有することを特徴とする半導体装置。 - ハイサイドスイッチとローサイドスイッチとのハーフブリッジ構成を持つパワー半導体チップを備えた電力変換装置であって、
前記パワー半導体チップは、
基板と、
前記基板の上に形成された半導体層積層体と、
前記ハイサイドスイッチのために前記半導体層積層体の上に互いに間隔をおいて形成されたソース電極及びドレイン電極と、
前記ハイサイドスイッチのために前記ソース電極と前記ドレイン電極との間に形成されたゲート電極と、
ドレイン引き出し配線、第1のソース引き出し配線及び第2のソース引き出し配線と、
第1の端子、第2の端子、第3の端子及び第4の端子とを有し、
前記ゲート電極は前記第1の端子に接続され、
前記ドレイン電極と前記第2の端子とは前記ドレイン引き出し配線を通じて互いに接続され、
前記ソース電極と前記第3の端子とは前記第1のソース引き出し配線を通じて互いに接続され、
前記ソース電極と前記第4の端子とは前記第2のソース引き出し配線を通じて互いに接続され、
前記第2の端子と前記第3の端子との間に主電流が流れるように構成され、
前記パワー半導体チップは、前記第1の端子と前記ゲート電極との間に挿入された駆動回路を更に有し、
前記駆動回路の接地端子は前記第4の端子に接続されていることを特徴とする電力変換装置。 - 請求項15記載の電力変換装置において、
前記駆動回路は、MOSFET、JFET、HFETのうちのいずれかで構成されていることを特徴とする電力変換装置。
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