US20130270633A1 - Semiconductor device - Google Patents
Semiconductor device Download PDFInfo
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- US20130270633A1 US20130270633A1 US13/914,139 US201313914139A US2013270633A1 US 20130270633 A1 US20130270633 A1 US 20130270633A1 US 201313914139 A US201313914139 A US 201313914139A US 2013270633 A1 US2013270633 A1 US 2013270633A1
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- trenches
- contact regions
- body contact
- semiconductor device
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 38
- 210000000746 body region Anatomy 0.000 claims abstract description 31
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 2
- 238000005452 bending Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body
- H01L27/08—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind
- H01L27/085—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only
- H01L27/088—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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 adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
- H01L29/4238—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out characterised by the surface lay-out
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
A semiconductor device according to the present invention includes: a body region of a first conductive type; trenches formed by digging in from a top surface of the body region; gate electrodes embedded in the trenches; source regions of a second conductive type formed at sides of the trenches in a top layer portion of the body region; and body contact regions of the first conductive type, penetrating through the source regions in a thickness direction and contacting the body region. The body contact regions are formed in a zigzag alignment in a plan view. With respect to a column formed by the body contact regions aligned in a predetermined column direction, the trenches are disposed at both sides in a row direction orthogonal to the column direction in a plan view, extend in the column direction, and form meandering lines each connecting a plurality of curved portions so that a predetermined gap in the row direction is formed respectively between adjacent trenches extending in the column direction and between the trenches and the body contact regions.
Description
- This application is a divisional of U.S. application Ser. No. 12/238,556, filed Sep. 26, 2008. Furthermore, this application claims the benefit of foreign priority of Japanese application 2007-255345, filed Sep. 28, 2007. The disclosures of both of these prior applications are incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates to a semiconductor device including a vertical MOSFET having a trench gate structure.
- 2. Description of Related Art
- For example, a VDMOSFET (Vertical Double diffused Metal Oxide Semiconductor Field Effect Transistor) with a trench gate structure is known as a power MOSFET having low ON resistance characteristics.
- For example with a semiconductor device including an N-channel VDMOSFET having a trench gate structure, an N-type epitaxial layer is laminated on an N+ (high concentration N)-type substrate. A P-type body region is formed in a top layer portion of the epitaxial layer. A trench is formed by digging in from a top surface of the body region. In the trench, a gate electrode is embedded via a gate insulating film. Further, an N+-type source region and a P+ (high concentration P)-type body contact region, penetrating through the source region in a thickness direction, are formed in a top layer portion of the body region. By grounding the source region and the body contact region and controlling a potential of the gate electrode while applying a positive voltage of a suitable magnitude to a drain electrode formed on a rear surface of the N+-type substrate, a channel is formed near an interface of the gate insulating film (trench) in the body region and a current flows between the source region and the drain electrode.
- With this type of VDMOSFET, a layout design of the trenches (gate electrodes) is being examined to enlarge a channel area per unit cell area and thereby reduce an ON resistance.
-
FIG. 4 is a schematic plan view of a layout of gate electrodes and body contact regions in a conventional semiconductor device. - With the conventional semiconductor device, a plurality of
body contact regions 41 are formed in a zigzag alignment in a plan view. With respect to a column formed by thebody contact regions 41 aligned in a predetermined direction Y (referred to as the “column direction Y” hereinafter in this section),gate electrodes 42 are disposed at both sides in a row direction X orthogonal to the column direction Y. Eachgate electrode 42 extends in the column direction Y and is bent at right angles repeatedly and alternately to respective sides in the row direction X so that gaps D, equivalent to a width in the row direction X of thebody contract region 41, are formed in the row direction X between thegate electrodes 42 and thegate electrodes 42 that are adjacent in the row direction X and between thegate electrodes 42 and thebody contact regions 41. - With this configuration, in comparison to a configuration where body contact regions are formed in an array in a plan view and rectilinearly extending gate electrodes are formed between respective columns formed by the body contact regions that are aligned in the column direction, a gate width (total length of a gate in a plan view) in a single unit cell is increased in correspondence to the bending of the gate electrodes and the channel area per unit cell area is thus increased. The ON resistance can thus be reduced.
- However, because the structure shown in
FIG. 4 has corner portions due to the bending of thegate electrodes 42 at right angles, when a stress is applied to the semiconductor device, the stress may concentrate at the corner portions and cause disconnection of thegate electrodes 42. - An object of the present invention is to provide a semiconductor device that enables a gate width to be increased while avoiding localized concentration of stress on gate electrodes.
- A semiconductor device according to one aspect of the present invention includes: a body region of a first conductive type; trenches formed by digging in from a top surface of the body region; gate electrodes embedded in the trenches; source regions of a second conductive type formed at sides of the trenches in a top layer portion of the body region; and body contact regions of the first conductive type, penetrating through the source regions in a thickness direction and contacting the body region. The body contact regions are formed in a zigzag alignment in a plan view. With respect to a column formed by the body contact regions aligned in a predetermined column direction, the trenches are disposed at both sides in a row direction orthogonal to the column direction in a plan view, extend in the column direction, and form meandering lines each connecting a plurality of curved portions so that a predetermined gap in the row direction is formed respectively between adjacent trenches and between the trenches and the body contact regions.
- With this configuration, the trenches in which the gate electrodes are embedded are formed by digging in from the top surface of the body region of the first conductive type. In the top layer portion of the body region, the source regions of the second conductive type are formed at the sides of the trenches. The body contact regions of the first conductive type are formed so as to penetrate through the source regions in the thickness direction. The body contact regions are disposed in the zigzag alignment in a plan view. With respect to the column formed by the body contact regions aligned in the predetermined column direction, the trenches are disposed at both sides in the row direction orthogonal to the column direction in a plan view. Each trench extends in the column direction and forms a meandering line connecting the curved portions so that the predetermined gap in the row direction is formed respectively between adjacent trenches and between the trenches and the body contact regions.
- Thus, in comparison to a configuration where body contact regions are formed in an array in a plan view and rectilinearly extending gate electrodes are formed between respective columns formed by the body contact regions that are aligned in the column direction, a gate width (total length of a gate in a plan view) in a single unit cell can be increased in correspondence to the meandering of the gate electrodes and a channel area per unit cell area can thus be increased. Consequently, an ON resistance can be reduced. Further, because the trenches do not have corner portions, when a stress is applied to the semiconductor device, localized concentration of stress on the gate electrodes embedded in the trenches can be prevented.
- A semiconductor device according to another aspect of the present invention includes: a body region of a first conductive type; trenches formed by digging in from a top surface of the body region; gate electrodes embedded in the trenches; source regions of a second conductive type formed at sides of the trenches in a top layer portion of the body region; and body contact regions of the first conductive type, penetrating through the source regions in a thickness direction and contacting the body region. The body contact regions are formed in a zigzag alignment in a plan view. With respect to a column formed by the body contact regions aligned in a predetermined column direction, the trenches are disposed at both sides in a row direction orthogonal to the column direction in a plan view, extend in the column direction, and form meandering lines each connecting a plurality of bent portions so that a predetermined gap in the row direction is formed respectively between adjacent trenches and between the trenches and the body contact regions. The bent portions are bent at an inner angle greater than 90 degrees.
- With this configuration, the trenches in which the gate electrodes are embedded are formed by digging in from the top surface of the body region of the first conductive type. In the top layer portion of the body region, the source regions of the second conductive type are formed at the sides of the trenches. The body contact regions of the first conductive type are formed so as to penetrate through the source regions in the thickness direction. The body contact regions are disposed in the zigzag alignment in a plan view. With respect to the column formed by the body contact regions aligned in the predetermined column direction, the trenches are disposed at both sides in the row direction orthogonal to the column direction in a plan view. Each trench extends in the column direction and forms a meandering line connecting the bent portions so that the predetermined gap in the row direction is formed respectively between adjacent trenches and between the trenches and the body contact regions.
- Thus, in comparison to the configuration where the body contact regions are formed in an array in a plan view and the rectilinearly extending gate electrodes are formed between the respective columns formed by the body contact regions that are aligned in the column direction, the gate width (total length of the gate in a plan view) in a single unit cell can be increased in correspondence to the meandering of the gate electrodes and the channel area per unit cell area can thus be increased. Consequently, the ON resistance can be reduced. Further, because the bent portions of the trenches are bent at the inner angle of greater than 90 degrees, when a stress is applied to the semiconductor device, localized concentration of stress on the gate electrodes embedded in the trenches can be prevented.
- As long as the inner angle is greater than 90 degrees, the bent portions may, for example, be bent at an inner angle of 120 degrees.
- The foregoing and other objects, features, and effects of the present invention will become more apparent from the following detailed description of the embodiments with reference to the attached drawings.
-
FIG. 1 is a schematic plan view of a layout of gate electrodes and body contact regions in a semiconductor device according to a first embodiment of the present invention. -
FIG. 2 is a schematic sectional view taken on sectioning line II-II shown inFIG. 1 . -
FIG. 3 is a schematic plan view of a layout of gate electrodes and body contact regions in a semiconductor device according to a second embodiment of the present invention. -
FIG. 4 is a schematic plan view of a layout of gate electrodes and body contact regions in a conventional semiconductor device. - Embodiments of the present invention shall now be described in detail with reference to the attached drawings.
-
FIG. 1 is a schematic plan view of a layout of gate electrodes and body contact regions in a semiconductor device according to a first embodiment of the present invention.FIG. 2 is a schematic sectional view taken on sectioning line II-II shown inFIG. 1 . - As shown in
FIG. 2 , thesemiconductor device 1 includes an N+-type semiconductor substrate 2 made of silicon. An N-type epitaxial layer 3 made of silicon is formed on thesemiconductor substrate 2. - A P-
type body region 4 is formed in a top layer portion of theepitaxial layer 3.Trenches 5 are formed by digging in from a top surface of theepitaxial layer 3. Thetrenches 5 penetrate through thebody region 4 and deepest portions thereof reach theepitaxial layer 3 below thebody region 4. Inside eachtrench 5, agate insulating film 6 is formed so as to cover an entire inner surface thereof. Inside eachtrench 5, agate electrode 7 is embedded by completely filling the inner side of thegate insulating film 6 with a polysilicon doped with a high concentration of an N-type impurity. - In a top layer portion of the
body region 4, N+-type source regions 8 are formed at sides of thetrenches 5. Further, P+-typebody contact regions 9 are formed to penetrate through thesource regions 8. - A
drain electrode 10 is formed on a rear surface of thesemiconductor substrate 2. - By grounding the
source region 8 and thebody contact region 9 and controlling a potential of thegate electrode 7 while applying a positive voltage of a suitable magnitude to thedrain electrode 10, a channel can be formed near an interface of the gate insulating film 6 (trench 5) in thebody region 4 to flow a current between thesource region 8 and thedrain electrode 10. - As shown in
FIG. 1 , thebody contact regions 9 have square shapes and are disposed in a zigzag alignment in a plan view. More specifically, thebody contact regions 9 form a plurality of columns and are disposed at a fixed pitch in a column direction Y in each column In two columns that are mutually adjacent in a row direction X orthogonal to the column direction Y, thebody contact regions 9 forming one column and thebody contact regions 9 forming the other column are in a positional relationship of being shifted by a half pitch (half of the pitch at which thebody contact regions 9 are positioned in the column direction). - With respect to the column formed by the body contact regions aligned in the column direction Y, the trenches 5 (gate electrodes 7) are disposed at both sides in the row direction X in a plan view. Each
trench 5 extends in the column direction Y and forms a meandering line connecting a plurality ofcurved portions 11 so that a fixed gap D in the row direction X is formed respectively betweenadjacent trenches 5 and between thetrenches 5 and thebody contact regions 9. - Thus, in comparison to a configuration where body contact regions are formed in an array in a plan view and rectilinearly extending gate electrodes are formed between respective columns formed by the body contact regions that are aligned in the column direction, a gate width (total length of a gate in a plan view) in a single unit cell can be increased in correspondence to the meandering of the
gate electrodes 7 and a channel area per unit cell area can thus be increased. Consequently, an ON resistance can be reduced. Further, because thetrenches 5 do not have corner portions, when a stress is applied to thesemiconductor device 1, localized concentration of stress on thegate electrodes 7 embedded in thetrenches 5 can be prevented. -
FIG. 3 is a schematic plan view of a layout of gate electrodes and body contact regions in a semiconductor device according to a second embodiment of the present invention. InFIG. 3 , portions equivalent to respective portions shown inFIG. 1 are provided with the same reference symbols as these portions. - In the
semiconductor device 31,trenches 32 extend in the column direction Y and form meandering lines connecting a plurality ofbent portions 33 so that the fixed gap D in the row direction X is formed respectively betweenadjacent trenches 32 and between thetrenches 32 and thebody contact regions 9. Eachbent portion 33 has a shape that bends to one side in the row direction X at an inner angle of 120 degrees with respect to a portion extending in the column direction Y of thetrench 32, then extends in the column direction Y, and then bends to the other side in the row direction X at an inner angle of 120 degrees with respect to the portion extending in the column direction Y. - Thus, in comparison to a configuration where body contact regions are formed in an array in a plan view and rectilinearly extending gate electrodes are formed between respective columns formed by the body contact regions that are aligned in the column direction, the gate width (total length of the gate in a plan view) in the single unit cell can be increased in correspondence to the meandering of the
gate electrodes 7 and the channel area per unit cell area can thus be increased. Consequently, the ON resistance can be reduced as with the configuration shown inFIG. 1 . Further, because thebent portions 33 of thetrenches 32 are bent at the inner angle greater than 90 degrees, when a stress is applied to thesemiconductor device 31, localized concentration of stress on thegate electrodes 34 embedded in thetrenches 32 can be prevented. - In the
semiconductor devices - While the present invention has been described in detail by way of the embodiments thereof, it should be understood that these embodiments are merely illustrative of the technical principles of the present invention but not limitative of the invention. The spirit and scope of the present invention are to be limited only by the appended claims.
- This application corresponds to Japanese Patent Application No. 2007-255345, filed with the Japan Patent Office on Sep. 28, 2007, the disclosure of which is incorporated herein by reference.
Claims (9)
1. A semiconductor device comprising:
a body region of a first conductive type;
trenches formed by digging in from a top surface of the body region;
gate electrodes embedded in the trenches;
source regions of a second conductive type formed at sides of the trenches in a top layer portion of the body region; and
body contact regions of the first conductive type, penetrating through the source regions in a thickness direction and contacting the body region; and
wherein the body contact regions are formed in a zigzag alignment in a plan view,
with respect to a column formed by the body contact regions aligned in a predetermined column direction Y, the trenches are disposed at both sides in a row direction X orthogonal to the column direction Y in a plan view, extend in the column direction Y, and form meandering lines each connecting a plurality of bent portions so that a predetermined gap D in the row direction X is formed respectively between adjacent trenches extending in the column direction Y and between the trenches and the body contact regions, and
the bent portions are bent at an inner angle greater than 90 degrees.
2. The semiconductor device according to claim 1 , wherein the bent portions are bent at an inner angle of 120 degrees.
3. The semiconductor device according to claim 1 , further comprising:
a semiconductor substrate of a second conductive type, the substrate made of a silicon substrate having top and bottom sides; and
an epitaxial layer of a second conductive type, the epitaxial layer made of silicon layer formed on the top side of the substrate; wherein
the body region is formed on the epitaxial layer, and
the trenches extends from a top side of the body region to the epitaxial layer.
4. The semiconductor device according to claim 1 , further comprising:
gate insulating films, each of the gate insulating films covering the surface of a respective one of the trenches to form an insulating trough; wherein
each of the gate electrodes completely filling a respective one of the insulating troughs with the gate electrodes coming up to the top of the troughs.
5. The semiconductor device according to claim 1 , wherein
the body contact regions are disposed in a plurality of columns that extend at a fixed pitch in the column Y direction when seen in a plan view, and
in a pair of columns that are adjacent one another in the row direction X, the body contact regions forming one of the columns and the body contact regions forming the other of the columns are in a positional relationship of being shifted in the column direction Y by half of the fixed pitch.
6. The semiconductor device according to claim 1 , wherein the body contact regions are substantially square in shape, with sides parallel to the row direction X or the column direction Y, when seen in a plan view.
7. The semiconductor device of claim 1 , wherein the semiconductor device is a vertical MOSFET having a trench gate structure.
8. The semiconductor device of claim 3 , wherein bottoms of the trenches are in the epitaxial layer.
9. The semiconductor device of claim 8 , wherein the body contact regions are much deeper than the regions surrounding the body contact regions.
Priority Applications (1)
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US13/914,139 US20130270633A1 (en) | 2007-09-28 | 2013-06-10 | Semiconductor device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2007255345A JP2009088198A (en) | 2007-09-28 | 2007-09-28 | Semiconductor device |
JP2007-255345 | 2007-09-28 | ||
US12/238,556 US8476702B2 (en) | 2007-09-28 | 2008-09-26 | Semiconductor device |
US13/914,139 US20130270633A1 (en) | 2007-09-28 | 2013-06-10 | Semiconductor device |
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US12/238,556 Division US8476702B2 (en) | 2007-09-28 | 2008-09-26 | Semiconductor device |
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US12/238,556 Active 2029-02-15 US8476702B2 (en) | 2007-09-28 | 2008-09-26 | Semiconductor device |
US13/914,139 Abandoned US20130270633A1 (en) | 2007-09-28 | 2013-06-10 | Semiconductor device |
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JP5767430B2 (en) * | 2007-08-10 | 2015-08-19 | ローム株式会社 | Semiconductor device and manufacturing method of semiconductor device |
JP2011014610A (en) * | 2009-06-30 | 2011-01-20 | Toshiba Corp | Semiconductor memory device |
JP6008377B2 (en) * | 2010-03-03 | 2016-10-19 | ルネサスエレクトロニクス株式会社 | P-channel power MOSFET |
JP5866002B2 (en) * | 2012-04-23 | 2016-02-17 | 三菱電機株式会社 | Semiconductor device and manufacturing method thereof |
CN103872126B (en) * | 2012-12-18 | 2016-12-28 | 上海华虹宏力半导体制造有限公司 | Groove type power MOS FET device |
WO2014174911A1 (en) * | 2013-04-23 | 2014-10-30 | 三菱電機株式会社 | Semiconductor device |
JP2016111207A (en) * | 2014-12-08 | 2016-06-20 | 三菱電機株式会社 | Power semiconductor device |
DE102015121563B4 (en) * | 2015-12-10 | 2023-03-02 | Infineon Technologies Ag | Semiconductor devices and a method of forming a semiconductor device |
US10269955B2 (en) * | 2017-01-17 | 2019-04-23 | Cree, Inc. | Vertical FET structure |
KR102394547B1 (en) * | 2017-10-25 | 2022-05-04 | 현대자동차 주식회사 | Semiconductor device |
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CN113519054B (en) * | 2019-03-01 | 2024-03-26 | 艾鲍尔半导体 | Method of manufacturing a shielded gate trench MOSFET device |
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JPH11330469A (en) * | 1998-05-21 | 1999-11-30 | Nec Kansai Ltd | Insulated gate type of semiconductor |
US6351009B1 (en) * | 1999-03-01 | 2002-02-26 | Fairchild Semiconductor Corporation | MOS-gated device having a buried gate and process for forming same |
US6413822B2 (en) * | 1999-04-22 | 2002-07-02 | Advanced Analogic Technologies, Inc. | Super-self-aligned fabrication process of trench-gate DMOS with overlying device layer |
JP3524850B2 (en) * | 2000-08-03 | 2004-05-10 | 三洋電機株式会社 | Insulated gate field effect semiconductor device |
JP4158453B2 (en) * | 2002-08-22 | 2008-10-01 | 株式会社デンソー | Semiconductor device and manufacturing method thereof |
US7075147B2 (en) * | 2003-06-11 | 2006-07-11 | International Rectifier Corporation | Low on resistance power MOSFET with variably spaced trenches and offset contacts |
US7960833B2 (en) * | 2003-10-22 | 2011-06-14 | Marvell World Trade Ltd. | Integrated circuits and interconnect structure for integrated circuits |
JP2007042892A (en) | 2005-08-03 | 2007-02-15 | Sharp Corp | Trenched misfet |
JP5147341B2 (en) * | 2007-09-21 | 2013-02-20 | パナソニック株式会社 | Semiconductor device |
-
2007
- 2007-09-28 JP JP2007255345A patent/JP2009088198A/en active Pending
-
2008
- 2008-09-26 US US12/238,556 patent/US8476702B2/en active Active
-
2013
- 2013-06-10 US US13/914,139 patent/US20130270633A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JP2009088198A (en) | 2009-04-23 |
US8476702B2 (en) | 2013-07-02 |
US20090096018A1 (en) | 2009-04-16 |
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