WO2020121507A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- WO2020121507A1 WO2020121507A1 PCT/JP2018/046034 JP2018046034W WO2020121507A1 WO 2020121507 A1 WO2020121507 A1 WO 2020121507A1 JP 2018046034 W JP2018046034 W JP 2018046034W WO 2020121507 A1 WO2020121507 A1 WO 2020121507A1
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- semiconductor
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- trench
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- conductor film
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 133
- 230000002093 peripheral effect Effects 0.000 claims abstract description 59
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 239000004020 conductor Substances 0.000 claims description 47
- 239000012535 impurity Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 56
- 230000015556 catabolic process Effects 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
- H01L29/407—Recessed field plates, e.g. trench field plates, buried field plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0638—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for preventing surface leakage due to surface inversion layer, e.g. with channel stopper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0684—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
- H01L29/0692—Surface layout
- H01L29/0696—Surface layout of cellular field-effect devices, e.g. multicellular DMOS transistors or IGBTs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
- H01L29/404—Multiple field plate structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
Definitions
- the present invention relates to a semiconductor device in which a structure for suppressing variation in withstand voltage due to external factors and improving stability is formed.
- a structure for improving the breakdown voltage is formed in the peripheral region around the element region where the semiconductor element is formed.
- a withstand voltage of a semiconductor device has been improved by arranging a trench in which a conductor film is embedded inside a groove having an insulating film formed on an inner wall surface in a peripheral region (see Patent Document 1).
- the depletion layer spreads in the peripheral region and reaches the surface of the semiconductor substrate, so that the semiconductor device is easily affected by external ions.
- the shape of the depletion layer is distorted and the breakdown voltage fluctuates or becomes unstable due to the influence of ions penetrating from the outside.
- the outer trench having the conductor film disposed inside the groove having the insulating film formed on the inner wall surface is disposed so as to surround the periphery of the element region, and the potential of the conductor film in the outer trench is increased.
- a semiconductor device in which the potential is set higher than the potential of the negative main electrode of the semiconductor device.
- the present invention it is possible to provide a semiconductor device which is small in size and whose fluctuations in breakdown voltage due to external factors such as external ions are suppressed.
- FIG. 6 is a schematic cross-sectional view showing the spread of a depletion layer of the semiconductor device according to the embodiment of the invention.
- FIG. 6 is a schematic cross-sectional view showing the spread of a depletion layer of a semiconductor device of a comparative example.
- FIG. 9 is a schematic cross-sectional view showing the configuration of a semiconductor device of a comparative example. It is a typical sectional view showing composition of a semiconductor device concerning a modification of an embodiment of the present invention.
- the semiconductor device includes a semiconductor substrate 10 in which a main surface is defined with an element region 110 and a peripheral region 120 surrounding the periphery of the element region 110.
- An interlayer insulating film 30 is arranged on the upper surface of the semiconductor substrate 10.
- a plurality of outer peripheral trenches 20 surrounding the element region 110 are arranged in multiple and spaced from each other. That is, in plan view, the annular outer peripheral trench 20 is arranged around the element region 110.
- the outer peripheral trench 20 has an insulating film 21 arranged on the inner wall surface of the groove extending from the upper surface of the semiconductor substrate 10 in the film thickness direction, and a conductor film 22 arranged on the insulating film 21 inside the groove.
- the groove of the outer peripheral trench 20 of the semiconductor substrate 10 in which the second conductive type second semiconductor layer 12 is laminated on the first conductive type first semiconductor layer 11 extends from the upper surface of the second semiconductor layer 12. Then, the first semiconductor layer 11 is reached.
- the conductor film 22 and the semiconductor substrate 10 face each other with the insulating film 21 in between.
- the bottom of the insulating film 21 is located below the PN junction surface between the first semiconductor layer 11 and the second semiconductor layer 12.
- the first conductivity type is n-type and the second conductivity type is p-type.
- a semiconductor element which is operated by applying a voltage between two main electrodes is formed.
- a vertical switching element such as a MOSFET having a gate trench structure or an insulated gate bipolar transistor (IGBT) is formed in the element region 110.
- IGBT insulated gate bipolar transistor
- a structure in which a front surface electrode (not shown) is arranged on the front surface of the semiconductor substrate 10 and a rear surface electrode 60 is arranged on the rear surface of the semiconductor substrate 10 may be used. ..
- the front surface electrode arranged on the upper surface of the semiconductor substrate 10 is the negative main electrode of the semiconductor element and the rear surface electrode 60 arranged on the lower surface of the semiconductor substrate 10 is the positive side main electrode of the semiconductor element Will be explained.
- the conductor film 22 of the outer peripheral trench 20 (hereinafter referred to as “outermost edge trench”) that is located closest to the outer edge of the semiconductor substrate 10 among the outer peripheral trenches 20 is the semiconductor element.
- the potential is set higher than the potential of the negative main electrode.
- the outermost edge trench is connected to the upper surface conductor film 50 arranged on the upper surface of the semiconductor substrate 10 through the opening of the interlayer insulating film 30.
- the conductor film 22 of the outer peripheral trench 20 other than the outermost edge trench is in an electrically floating state.
- the upper surface conductor film 50 is connected to the upper surface of the channel stopper region 40 arranged along the outer edge of the semiconductor substrate 10.
- the channel stopper region 40 of the same conductivity type as the first semiconductor layer 11 of the semiconductor substrate 10 is formed in an annular shape in a plan view in a part of the upper portion of the first semiconductor layer 11 in the peripheral region 120.
- the channel stopper region 40 is arranged for the purpose of suppressing fluctuations in breakdown voltage due to external factors such as external ions in the peripheral region 120, and the impurity concentration of the channel stopper region 40 is higher than that of the first semiconductor layer 11. It is set high.
- the depletion layer is bent near the interface between the channel stopper region 40 and the first semiconductor layer 11, the depletion layer is prevented from reaching the diced side surface (outer edge) of the semiconductor substrate 10.
- the first semiconductor layer 11 is formed up to the outer edge of the peripheral region 120, but the end portion of the second semiconductor layer 12 does not reach the outer edge of the semiconductor substrate 10.
- the end of the second semiconductor layer 12 is in contact with the inner wall of the outermost edge trench, but the second semiconductor layer 12 does not extend to the outer edge side of the semiconductor substrate 10 with respect to the outer wall of the outermost edge trench.
- the end portion of the second semiconductor layer 12 may extend to the channel stopper region 40 side with respect to the outermost edge trench.
- the bottom of the outermost edge trench is below the PN junction surface between the first semiconductor layer 11 and the second semiconductor layer 12
- the bottom of the outermost edge trench has the first semiconductor layer 11 and the second semiconductor layer. The PN junction surface with the layer 12 may not be reached.
- the conductor film 22 of the outermost edge trench is electrically connected to the back electrode 60 via the top conductor film 50 and the semiconductor substrate 10.
- the semiconductor element formed in the element region 110 is a transistor
- the negative main electrode is the emitter electrode
- the positive main electrode is the collector electrode
- the conductor film 22 of the outermost edge trench is the collector electrode.
- the conductor film 22 of the outermost edge trench is set to potential.
- the conductor film 22 of the outermost edge trench is set to the potential of the drain electrode.
- the semiconductor element formed in the element region 110 is a diode
- the conductor film 22 of the outermost edge trench is set to the potential of the anode.
- the depletion layer extends from the first semiconductor layer 11 and the second semiconductor layer 12 on the element region 110 side, so that the depletion layer in the peripheral region 120 moves laterally and downward. It spreads and the concentration of the electric field is relieved. Then, the conductor film 22 of the outermost edge trench is electrically connected to the positive-side main electrode of the semiconductor element, and thereby set to a potential higher than the potential of the negative-side main electrode of the semiconductor element. This suppresses the expansion of the depletion layer in the peripheral region 120 toward the upper side and the outer end.
- FIG. 2 shows the spread of the depletion layer 100 in the peripheral region 120 of the semiconductor device shown in FIG. 1
- FIG. 3 shows the spread of the depletion layer 100 in the peripheral region 120 of the semiconductor device of the comparative example.
- the conductor films 22 of all the outer peripheral trenches 20 are in an electrically floating state.
- the depletion layer 100 is suppressed from extending above the peripheral region 120 or at the outer end as compared with the comparative example.
- this is because the conductor film 22 of the outermost edge trench is set to a potential higher than the potential of the negative main electrode of the semiconductor element, so that the depletion layer 100 is formed in the semiconductor substrate 10. This is because an electric field is generated in a direction that prevents the electric field from extending toward the upper surface of the.
- the depletion layer 100 when the depletion layer 100 extends as shown in FIG. 3, the depletion layer 100 easily reaches the upper surface of the semiconductor substrate 10 and the side die lines. In particular, the larger the voltage applied between the main electrodes of the semiconductor element, the more the depletion layer spreads outward. If the width from the element region 110 to the die line is widened so that the depletion layer 100 does not reach the side surface of the chipped semiconductor device, the problem of increasing the chip size occurs. Therefore, for example, as shown in FIG. 4, the channel stopper region 40 is deeply formed. However, this causes a problem that the width of the channel stopper region 40 is widened or the manufacturing process is lengthened. Further, since the depletion layer 100 reaches the upper surface of the semiconductor substrate 10, the semiconductor device is easily affected by the outside.
- the outermost edge trench suppresses the extension of the depletion layer toward the outer edge of the peripheral region 120. Therefore, it is not necessary to widen the width of the die line, and the increase in chip size is suppressed. Further, it is not necessary to form the channel stopper region 40 deep. Further, according to the semiconductor device shown in FIG. 1, since the depletion layer is prevented from reaching the upper surface of the semiconductor substrate 10, it is possible to prevent the semiconductor device from being affected by the outside.
- the outer peripheral trench 20 is formed as follows, for example. First, the groove of the outer peripheral trench 20 is formed in the peripheral region 120. After that, the insulating film 21 is formed on the inner wall surface of the groove by using a thermal oxidation method or the like. Next, the conductor film 22 is formed inside the groove.
- the conductor film 22 is, for example, a polysilicon film or the like. For example, the conductor film 22 is formed on the entire upper surface of the semiconductor substrate 10 so that the groove is filled with the conductor film 22. Then, the peripheral trench 20 is flattened so that the position of the upper surface of the conductor film 22 is lower than or the same as the position of the upper surface of the semiconductor substrate 10.
- the groove of the outer peripheral trench 20 may be formed simultaneously with the formation of the gate trench. Then, at the same time as forming the gate insulating film on the inner wall surface of the gate trench, the insulating film 21 of the outer peripheral trench 20 is formed, and at the same time as forming the gate electrode, the conductor film 22 is formed.
- the upper surface conductor film 50 extends above the outermost edge trench and further above the inner peripheral trench 20.
- the upper surface conductor film 50 can function like a field plate.
- the conductor film 50 controls the depletion layer on the upper surface of the semiconductor substrate 10, and the depletion layer can be extended downward in the outermost edge trench, and a synergistic effect can be obtained.
- the upper surface conductor film 50 in order to prevent the depletion layer from being bent toward the element region 110 due to the effect of the field plate, it is preferable that the upper surface conductor film 50 not extend to a region close to the element region 110.
- the conductor film 22 of the outermost edge trench of the outer peripheral trench 20 is set to a potential higher than the potential of the negative main electrode of the semiconductor element. To do. As a result, it is possible to realize a semiconductor device in which the depletion layer in the peripheral region 120 is prevented from expanding and variation in breakdown voltage due to external factors such as external ions is suppressed.
- the conductor film 22 of the outermost edge trench has a higher potential than the potential of the main electrode on the negative side of the semiconductor element.
- the structure for setting can be easily realized. Therefore, the semiconductor device shown in FIG. 1 is easy to manufacture.
- the width W of the conductor film 22 in the outermost trench is wider than the width of the conductor film 22 in the other outer trenches 20.
- the extension of the depletion layer 100 toward the upper surface and the outer edge of the peripheral region 120 is suppressed. Therefore, it is not necessary to widen the width of the die line nor to form the channel stopper region 40 deep.
- the outermost edge trench is electrically connected to the back surface electrode 60 arranged on the lower surface of the semiconductor substrate 10 .
- the outermost trench may be electrically connected to other electrodes of the device.
- the groove depth of the outermost edge trench may be deeper than the groove depth of at least one of the outer peripheral trench 20 and the gate trench.
- the outer peripheral trench 20 may be only the outermost edge trench, and may be replaced with a known breakdown voltage improving region such as a RESURF region or FLR instead of the outermost trench 20 other than the outermost edge trench. That is, the conductor film 22 in the outer peripheral trench 20 and the channel stopper region 40 may be electrically connected. Further, it is desirable that the outer peripheral trench 20 and the channel stopper region 40 are separated from each other on the upper surface side of the semiconductor substrate 10, and the first semiconductor layer 11 is interposed between the outer peripheral trench 20 and the channel stopper region 40.
- the semiconductor device of the present invention can be used in the electronic equipment industry including the manufacturing industry that manufactures semiconductor devices in which fluctuations in breakdown voltage due to external factors such as external ions are suppressed.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
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- Condensed Matter Physics & Semiconductors (AREA)
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- Computer Hardware Design (AREA)
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Abstract
Description
図5に示す本発明の実施形態の変形例に係る半導体装置は、最外縁トレンチの導電体膜22の幅Wが、他の外周トレンチ20の導電体膜22の幅よりも広い。最外縁トレンチの導電体膜22の幅Wを広くすることにより、空乏層100を周辺領域120の下面に向かってより伸びやすくする電界の強度が強くなる。
上記のように本発明は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この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形態、実施例及び運用技術が明らかとなろう。
20…外周トレンチ
21…絶縁膜
22…導電体膜
30…層間絶縁膜
40…チャネルストッパ領域
50…上面導電体膜
60…裏面電極
100…空乏層
110…素子領域
120…周辺領域
Claims (5)
- 素子領域と前記素子領域の周囲を囲む周辺領域が主面に定義された半導体基体を備え、
前記素子領域に、主電極の間に電圧を印加されて動作する半導体素子が形成され、
前記半導体基体の上面から膜厚方向に延伸する溝の内壁面に配置された絶縁膜、及び前記溝の内部で前記絶縁膜の上に配置された導電体膜を有する外周トレンチが、前記周辺領域に配置され、
前記外周トレンチ内の前記導電体膜が前記半導体素子の負側の主電極の電位よりも高い電位に設定される
ことを特徴とする半導体装置。 - 素子領域と前記素子領域の周囲を囲む周辺領域が主面に定義された半導体基体を備え、
前記周辺領域に、前記半導体基体の上面から膜厚方向に延伸する溝の内壁面に配置された絶縁膜、及び前記溝の内部で前記絶縁膜の上に配置された導電体膜を有する外周トレンチが配置され、
前記半導体基体が、
前記素子領域と前記周辺領域に渡って形成された第1導電型の第1半導体層と、
前記第1半導体層よりも不純物濃度が高く、前記外周トレンチ内の前記導電体膜と電気的に接続し、前記外周トレンチから離間して前記周辺領域に形成されたチャネルストッパ領域と
を含むことを特徴とする半導体装置。 - 前記外周トレンチと前記チャネルストッパ領域との間の前記半導体基体に、第1導電型の半導体層が配置されていることを特徴とする請求項2に記載の半導体装置。
- 前記半導体素子の正側の主電極が前記半導体基体の下面に配置され、
前記半導体基体を介して前記半導体素子の正側の主電極と前記外周トレンチ内の前記導電体膜が電気的に接続される
ことを特徴とする請求項1に記載の半導体装置。 - 前記外周トレンチと前記素子領域との間に、複数のトレンチが配置されており、
前記複数のトレンチが、前記半導体基体の上面から膜厚方向に延伸する溝の内壁面に配置された絶縁膜と該絶縁膜の上に配置された導電体膜をそれぞれ有し、
前記外周トレンチ内の前記導電体膜の幅又は深さが、前記複数のトレンチ内の前記導電体膜の幅よりも広い、または深い
ことを特徴とする請求項1に記載の半導体装置。
Priority Applications (4)
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PCT/JP2018/046034 WO2020121507A1 (ja) | 2018-12-14 | 2018-12-14 | 半導体装置 |
CN201880098704.3A CN112889158B (zh) | 2018-12-14 | 2018-12-14 | 半导体装置 |
KR1020217011066A KR102531988B1 (ko) | 2018-12-14 | 2018-12-14 | 반도체 장치 |
JP2020559661A JP7201004B2 (ja) | 2018-12-14 | 2018-12-14 | 半導体装置 |
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PCT/JP2018/046034 WO2020121507A1 (ja) | 2018-12-14 | 2018-12-14 | 半導体装置 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09283754A (ja) * | 1996-04-16 | 1997-10-31 | Toshiba Corp | 高耐圧半導体装置 |
WO2011024842A1 (ja) * | 2009-08-28 | 2011-03-03 | サンケン電気株式会社 | 半導体装置 |
JP2011124464A (ja) * | 2009-12-14 | 2011-06-23 | Toshiba Corp | 半導体装置及びその製造方法 |
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JP2644776B2 (ja) * | 1987-11-02 | 1997-08-25 | 株式会社日立製作所 | 半導体装置及びその製造方法 |
JP4059566B2 (ja) * | 1998-06-24 | 2008-03-12 | Necエレクトロニクス株式会社 | 絶縁ゲート型半導体装置及びその製造方法 |
JP5050329B2 (ja) | 2005-08-26 | 2012-10-17 | サンケン電気株式会社 | トレンチ構造半導体装置及びその製造方法 |
US8304829B2 (en) * | 2008-12-08 | 2012-11-06 | Fairchild Semiconductor Corporation | Trench-based power semiconductor devices with increased breakdown voltage characteristics |
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2018
- 2018-12-14 WO PCT/JP2018/046034 patent/WO2020121507A1/ja active Application Filing
- 2018-12-14 KR KR1020217011066A patent/KR102531988B1/ko active IP Right Grant
- 2018-12-14 JP JP2020559661A patent/JP7201004B2/ja active Active
- 2018-12-14 CN CN201880098704.3A patent/CN112889158B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09283754A (ja) * | 1996-04-16 | 1997-10-31 | Toshiba Corp | 高耐圧半導体装置 |
WO2011024842A1 (ja) * | 2009-08-28 | 2011-03-03 | サンケン電気株式会社 | 半導体装置 |
JP2011124464A (ja) * | 2009-12-14 | 2011-06-23 | Toshiba Corp | 半導体装置及びその製造方法 |
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JPWO2020121507A1 (ja) | 2021-10-21 |
CN112889158A (zh) | 2021-06-01 |
KR102531988B1 (ko) | 2023-05-11 |
CN112889158B (zh) | 2024-02-02 |
KR20210057160A (ko) | 2021-05-20 |
JP7201004B2 (ja) | 2023-01-10 |
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