JP4135941B2 - 耐久性を有するスーパージャンクションデバイス - Google Patents
耐久性を有するスーパージャンクションデバイス Download PDFInfo
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- JP4135941B2 JP4135941B2 JP2004306311A JP2004306311A JP4135941B2 JP 4135941 B2 JP4135941 B2 JP 4135941B2 JP 2004306311 A JP2004306311 A JP 2004306311A JP 2004306311 A JP2004306311 A JP 2004306311A JP 4135941 B2 JP4135941 B2 JP 4135941B2
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- 239000004065 semiconductor Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000007943 implant Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 238000002513 implantation Methods 0.000 description 5
- 235000012431 wafers Nutrition 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- 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
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/34—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
- H01L21/38—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions
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- 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
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- 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
- H01L29/0611—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 increasing or controlling the breakdown voltage of reverse biased devices
- H01L29/0615—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 increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
- H01L29/063—Reduced surface field [RESURF] pn-junction structures
- H01L29/0634—Multiple reduced surface field (multi-RESURF) structures, e.g. double RESURF, charge compensation, cool, superjunction (SJ), 3D-RESURF, composite buffer (CB) structures
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- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66674—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/66712—Vertical DMOS transistors, i.e. VDMOS transistors
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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
- H01L29/02—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
- H01L29/10—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 with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/1095—Body region, i.e. base region, of DMOS transistors or IGBTs
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- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
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- Insulated Gate Type Field-Effect Transistor (AREA)
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Description
20、21、22 Pチャネル領域
24、25、26 N+ソース領域
27 ゲート酸化物領域
28 ポリシリコンゲート
29 LTO絶縁層
30 ソース電極
40 ドレイン電極
50 マスク
51、52 ウインドウ
N1〜N6 エピタキシャル層
P1〜P6 P型領域
Claims (6)
- 順に形成された複数のエピタキシャル層を有する第1の導電性の半導体領域と、
半導体領域の厚さ方向に延びる複数のパイロンであって、前記複数のパイロンの一つ一つは、厚さ方向に整列する複数の第2の導電性の領域を有し、前記第2の導電性の領域の一つ一つは、その全体が一つ一つの前記エピタキシャル層内に形成される、前記パイロンと、
各パイロンの最上部よりも上に配置されかつ各パイロンに接触する第2の導電性のチャネル領域を有するMOSゲート構造と、
を備え、
各パイロンの複数の前記第2の導電性の領域のうち前記チャネル領域に接する領域は、各パイロンの当該領域以外の部分の領域よりも大きな径を有し、前記部分の領域は、これを包囲する前記第1の導電性の半導体領域と荷電平衡の状態にあり、かつ、前記チャネル領域に接する前記領域はこれを包囲する前記第1の導電性の半導体領域よりも大きな電荷を有する
スーパージャンクションデバイス。 - 前記パイロンは、略円筒状である請求項1記載のデバイス。
- パイロンの前記第2の導電性の領域のチャネル領域に接する前記少なくとも一つは、前記包囲する前記第1の導電性の半導体領域と荷電平衡にある前記一部よりも径が2%大きい、請求項1記載のデバイス。
- 第1の導電性を有し、複数のエピタキシャル層を有する半導体ウェハーと、
少なくとも半導体ウェハーの厚さ方向に延びる、複数のパイロンであって、前記複数のパイロンの一つ一つは、厚さ方向に整列する複数の第2の導電性の領域を有し、前記第2導電性領域の一つ一つは、その全体が一つ一つの前記エピタキシャル層内に形成される前記パイロンと、
を備え、
各パイロンの前記複数の領域のうち最上部の領域は、各パイロンの当該最上部の領域の下方の領域よりも大きな径を有し、かつ、当該下方の領域は、該ウエハーのこれを包囲する部分と荷電平衡の状態にあり、前記最上部の領域はこれを包囲する部分よりも大きな電荷を有し、
さらに、各パイロンの該最上部の領域の上面にはそれぞれMOSゲート構造が配置され、
各MOSゲート構造は、
第2の導電性を有しかつ対応する各パイロンの最上部の全体よりも径が大きなチャネル領域と、
該第1の導電性を有しかつ該チャネル領域内に形成されたソース領域と、
ゲート構造と、
該ウエハーの最上部に形成されかつ該ソース領域及び該チャネル領域に接触するソース電極と
を備えるスーパージャンクションデバイス。 - 各パイロンの前記最上部は、前記下部よりも径が2%大きい、請求項4記載のデバイス。
- 第1の導電性である基板を設け、
該第1の導電性を有する半導体材料の複数のエピタキシャル層を、順に重畳して形成し、
前記エピタキシャル層のそれぞれに、第1の導電性とは別の第2の導電性を有する第1の領域を、縦に整列して形成し、前記第1の領域は、これを包囲する前記エピタキシャル層と荷電平衡の状態にあり、
該順に重畳して形成されたエピタキシャル層の上に、第1の導電性を有する他のエピタキシャル層を形成し、
第2の導電性を有する注入物を、該他のエピタキシャル層内に拡散させて、該第1の領域と縦方向に整列する第2の領域を形成し、該第2の領域は、該第1の領域よりも大きな径を有し、かつ、これを包囲する前記他のエピタキシャル層よりも大きな電荷を有し、該第2の導電性の該第2の領域の上に、該第2の導電性を有するチャネル領域を有するMOSゲート構造を形成する
スーパージャンクションデバイスを形成する方法。
Applications Claiming Priority (2)
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US51317403P | 2003-10-21 | 2003-10-21 | |
US10/968,499 US7166890B2 (en) | 2003-10-21 | 2004-10-19 | Superjunction device with improved ruggedness |
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JP2005142557A JP2005142557A (ja) | 2005-06-02 |
JP4135941B2 true JP4135941B2 (ja) | 2008-08-20 |
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JP (1) | JP4135941B2 (ja) |
DE (1) | DE102004051348B4 (ja) |
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US7166890B2 (en) | 2007-01-23 |
JP2005142557A (ja) | 2005-06-02 |
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US20070048909A1 (en) | 2007-03-01 |
DE102004051348A1 (de) | 2005-06-23 |
US20050082570A1 (en) | 2005-04-21 |
US7767500B2 (en) | 2010-08-03 |
US9478441B1 (en) | 2016-10-25 |
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