JP4913336B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP4913336B2 JP4913336B2 JP2004281002A JP2004281002A JP4913336B2 JP 4913336 B2 JP4913336 B2 JP 4913336B2 JP 2004281002 A JP2004281002 A JP 2004281002A JP 2004281002 A JP2004281002 A JP 2004281002A JP 4913336 B2 JP4913336 B2 JP 4913336B2
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
- H10D30/66—Vertical DMOS [VDMOS] FETs
- H10D30/665—Vertical DMOS [VDMOS] FETs having edge termination structures
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/028—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs
- H10D30/0291—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of vertical DMOS [VDMOS] FETs
- H10D30/0297—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of vertical DMOS [VDMOS] FETs using recessing of the gate electrodes, e.g. to form trench gate electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
- H10D30/66—Vertical DMOS [VDMOS] FETs
- H10D30/668—Vertical DMOS [VDMOS] FETs having trench gate electrodes, e.g. UMOS transistors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/101—Integrated devices comprising main components and built-in components, e.g. IGBT having built-in freewheel diode
- H10D84/141—VDMOS having built-in components
- H10D84/143—VDMOS having built-in components the built-in components being PN junction diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/512—Disposition of the gate electrodes, e.g. buried gates
- H10D64/513—Disposition of the gate electrodes, e.g. buried gates within recesses in the substrate, e.g. trench gates, groove gates or buried gates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/514—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the insulating layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/514—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the insulating layers
- H10D64/516—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the insulating layers the thicknesses being non-uniform
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/517—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the conducting layers
- H10D64/519—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the conducting layers characterised by their top-view geometrical layouts
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- Electrodes Of Semiconductors (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
本実施の形態に係るMOSFET100を図1(a)および図1(b)に示す。
本実施形態に係るMOSFET200は、ゲートパッド部に双方向保護ダイオードが形成された点で第1の実施の形態と異なる。
60 セル領域
70 外周部
100 MOSFET
101 半導体層
101a シリコン基板
102 チャネル拡散領域
103 ソース領域
104 酸化膜
105 ゲート電極
105a ゲート電極
106 ゲートポリシリコン
106a ゲートポリシリコン
111 溝
112 溝
118 酸化膜
130 絶縁膜
132 ポリシリコン
140 双方向保護ダイオード
150 ソース電極
152 ゲート電極
160 ドレイン電極
200 MOSFET
Claims (6)
- 電界効果型トランジスタを有する半導体装置であって、
前記電界効果型トランジスタは、
半導体基板と、
前記半導体基板上に形成された半導体層と、
前記半導体層内に形成されたトレンチと、
前記トレンチ内にゲート絶縁膜を介して設けられたゲート電極と、
前記トレンチ内部において、前記ゲート電極の上部に設けられた絶縁膜と、
前記半導体層上面において前記トレンチの脇に設けられたベース領域と、
前記ベース領域上面において前記トレンチの脇に設けられたソース領域と、
前記絶縁膜および前記ソース領域の上部に設けられたソース電極と、
前記トレンチ下部に設けられたドレイン領域と、
前記半導体基板裏面に設けられたドレイン電極と、
を備え、
前記絶縁膜は、前記ゲート電極と前記ソース電極とを絶縁し、
前記半導体装置は、セル部と、該セル部の周囲に設けられた終端部とを備え、
前記セル部に前記電界効果型トランジスタを有するとともに、前記終端部にトレンチを有し、
前記終端部に設けられたトレンチの底面が、前記セル部に設けられた前記電界効果型トランジスタのトレンチの底面よりも下方に位置し、且つ、前記ベース領域と前記半導体層間のPN接合よりも下方に位置しており、
前記終端部に設けられたトレンチの底面には、前記ゲート絶縁膜の厚さよりも厚い酸化膜が形成されており、
前記終端部に設けられたトレンチの底面が、前記セル部に設けられたトレンチの底面よりも下方に位置し、且つ、前記ベース領域と前記半導体層間のPN接合よりも下方に位置しており、前記終端部に前記酸化膜が形成されていることによって、前記セル部の空乏層を遮断することを特徴とする半導体装置。 - 請求項1に記載の半導体装置において、
前記セル部に設けられた絶縁膜および前記終端部に設けられた絶縁膜の上面のすべてのレベルが、前記半導体層の上面のレベルと同じ、もしくは下方に位置することを特徴とする半導体装置。 - 電界効果型トランジスタを有する半導体装置であって、
前記電界効果型トランジスタは、
半導体基板と、
前記半導体基板上に形成された半導体層と、
前記半導体層内に形成されたトレンチと、
前記トレンチ内にゲート絶縁膜を介して設けられたゲート電極と、
前記トレンチ内部において、前記ゲート電極の上部に設けられた絶縁膜と、
前記半導体層上面において前記トレンチの脇に設けられたベース領域と、
前記ベース領域上面において前記トレンチの脇に設けられたソース領域と、
前記絶縁膜および前記ソース領域の上部に設けられたソース電極と、
前記トレンチ下部に設けられたドレイン領域と、
前記半導体基板裏面に設けられたドレイン電極と、
を備え、
前記絶縁膜は、前記ゲート電極と前記ソース電極とを絶縁し、
前記半導体装置は、セル部と、該セル部の周囲に設けられた終端部とを備え、
前記セル部に前記電界効果型トランジスタを有するとともに、前記終端部にトレンチを有し、
前記終端部に設けられたトレンチの底面が、前記セル部に設けられた前記電界効果型トランジスタのトレンチの底面よりも下方に位置し、且つ、前記ベース領域と前記半導体層間のPN接合よりも下方に位置しており、
前記終端部に設けられたトレンチの底面には、前記ゲート絶縁膜の厚さよりも厚い酸化膜が形成されており、
前記セル部に設けられた絶縁膜および前記終端部に設けられた絶縁膜の上面のすべてのレベルが、前記半導体層の上面のレベルと同じ、もしくは下方に位置することを特徴とする半導体装置。 - 請求項1〜3のいずれか一項に記載の半導体装置において、
前記終端部に設けられたトレンチに半導体素子が設けられたことを特徴とする半導体装置。 - 請求項4に記載の半導体装置において、
前記半導体素子が、ダイオードであることを特徴とする半導体装置。 - 請求項4に記載の半導体装置において、
前記半導体素子が、電界効果型トランジスタであることを特徴とする半導体装置。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004281002A JP4913336B2 (ja) | 2004-09-28 | 2004-09-28 | 半導体装置 |
| US11/229,524 US7727831B2 (en) | 2004-09-28 | 2005-09-20 | Semiconductor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004281002A JP4913336B2 (ja) | 2004-09-28 | 2004-09-28 | 半導体装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006100317A JP2006100317A (ja) | 2006-04-13 |
| JP4913336B2 true JP4913336B2 (ja) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004281002A Expired - Fee Related JP4913336B2 (ja) | 2004-09-28 | 2004-09-28 | 半導体装置 |
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|---|---|
| US (1) | US7727831B2 (ja) |
| JP (1) | JP4913336B2 (ja) |
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2004
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| US20060113577A1 (en) | 2006-06-01 |
| US7727831B2 (en) | 2010-06-01 |
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