JP2001508950A - 炭化珪素ショットキーダイオードの接合止端 - Google Patents
炭化珪素ショットキーダイオードの接合止端Info
- Publication number
- JP2001508950A JP2001508950A JP53423398A JP53423398A JP2001508950A JP 2001508950 A JP2001508950 A JP 2001508950A JP 53423398 A JP53423398 A JP 53423398A JP 53423398 A JP53423398 A JP 53423398A JP 2001508950 A JP2001508950 A JP 2001508950A
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- jte
- layer
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- junction
- semiconductor device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 47
- 230000007704 transition Effects 0.000 claims abstract description 42
- 239000004065 semiconductor Substances 0.000 claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims description 38
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 12
- 238000005468 ion implantation Methods 0.000 claims description 10
- 230000003247 decreasing effect Effects 0.000 claims description 7
- 238000005530 etching Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 230000000873 masking effect Effects 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 150000002500 ions Chemical class 0.000 claims 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 229910052733 gallium Inorganic materials 0.000 claims 1
- 238000002513 implantation Methods 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 45
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 15
- 229910052710 silicon Inorganic materials 0.000 description 15
- 239000010703 silicon Substances 0.000 description 15
- 238000002161 passivation Methods 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241001354791 Baliga Species 0.000 description 1
- UNPLRYRWJLTVAE-UHFFFAOYSA-N Cloperastine hydrochloride Chemical compound Cl.C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)OCCN1CCCCC1 UNPLRYRWJLTVAE-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
Classifications
-
- 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
- H01L29/0611—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]
-
- 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
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
- H01L29/1608—Silicon carbide
-
- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66053—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide
- H01L29/6606—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide the devices being controllable only by variation of the electric current supplied or the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. two-terminal devices
-
- 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
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
- H01L29/872—Schottky diodes
-
- 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
- H01L29/0657—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 of the body
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electrodes Of Semiconductors (AREA)
- Light Receiving Elements (AREA)
- Amplifiers (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. ショットキー接続を構成する炭化珪素(SiC)からなる第1の導体層(1) と金属コンタクト層(2)とを有する半導体装置において、接続のエッジ止端部 が接続止端延長(JTE)で囲まれた遷移ベルト(TB)を有し、この遷移ベルトは 接合部から外側に向かってチャージレベルが漸増し、JTEは外に向かってチャー ジレベルが段階的又は連続的に漸減することを特徴とする半導体装置。 2. 前記遷移ベルト(TB)が第1の導体層(1)の上部で金属コンタクト層(2 )の近傍にSiCからなる第2の導体層(4)を有し、この第2の導体層(4)は金 属コンタクト層(2)に面する厚さが変化し、当該金属コンタクト層(2)と接触 するかこれに覆われたことを特徴とする請求項1に記載の半導体装置。 3. 前記遷移ベルト(TB)は、前記第1の導体層(1)に埋め込まれた第2の 導電型SiC材料からなる領域を有し、前記領域は第1の層(1)に面しかつ金属コ ンタクト層(2)を平行に取り囲み、前記TB領域のドーピング密度は遷移ベルト のチャージレベルが外に向かって水平方向に漸増するように定められることを特 徴とする請求項1に記載の半導体装置。 4. 接合止端延長(JTE)は、前記第1の層(1)に埋め込まれた第2の導体型 のSiC材料からなるJTE領域を有し、JTE領域は第1層に面して遷移ベルト(TB) を取り囲み、JTE領域のドーピング密度は遷移ベルトのチャージレベルが水平方 向外に向かって漸減するように定められていることを特徴とする前記請求項2又 は3に記載の半導体装置。 5. 前記接合止端延長(JTE)が、前記第1の層(1)の上部に形成され遷移 領域を横から取り囲み、半導体の表面と対向し第2の導電性SiC材料からなる層 を有し、JTEは外に向かって厚さが減少し、JTEのチャージレベルは水平方向外に 向かって減少することを特徴とする請求項2に記載の半導体装置。 6. 前記接続止端延長(JTE)が、外側に向かって厚さが減少する少なくとも 1つの階段状ステップ(s1-s4)を有し、JTEのチャージレベルが水平方向外側に向 かって階段状に減少することを特徴とする請求項5に記載の半導体装置。 7. 階段状ステップあるいは領域の相対的なチャージレベルが、 a)4領域JTEの場合にはQ1:Q2:Q3:Q4=100:(50-100):(25-75):(0-50) b)3領域JTEの場合にはQ1:Q2:Q3=100:(30-100):(0-60) c)2領域JTEの場合にはQ1:Q2=100:(25-75) d)1領域且Eの場合にはQ1=(25-75)Q0 ここにおいて、Q0=100は設計最大電圧が印加されたpn接合の空間電荷領域に 対する相対電荷密度であり、Q1はTB領域の最外部の電荷密度である請求項4又は 6に記載の半導体装置。 8. TBの領域の相対的チャージレベルが、 a)4領域JTEの場合にはQ1:Q2:Q3:Q4=100:(50-100):(25-75):(0-50) b)3領域JTEの場合にはQ1:Q2:Q3=100:(30-100):(0-60) c)2領域且Eの場合にはQ1:Q2=100:(25-75) d)1領域JTEの場合にはQ1=(25-75)Q0 ここにおいて、Q0=100は設計最大電圧が印加されたpn接合の空間電荷領域に 対する相対電荷密度であり、Q1はTB領域の最外部の電荷密度である請求項3に記 載の半導体装置。 9. 炭化珪素からなる第1の導電層(1)と、金属コンタクト層(2)とを有し ショットキー接続を構成する半導体装置を製作する方法であって、前記第1の導 電層(1)の表面のショットキー接続の外側に: 外に向かってチャージレベルが漸増する遷移ベルト(TB)と、該遷移ベルトを囲み チャージレベルが段階的にあるいは連続的に漸減する接続止端延長(JTE)を形成 することでエッジ止端部を形成することを特徴とする半導体装置製造方法。 10. 前記遷移ベルト(TB)がLOCOS技術によって内側に厚さが漸減する壁を 製造することで製作される請求項9に記載の方法。 11. 金属層(2)が厚さが変化する壁を覆うかあるいはこれと接触するよう に製作されることを特徴とする請求項10に記載の方法。 12. 前記JTEは第1のタイプの導電層にイオン注入によって第2の型の導電 層領域を形成することを特徴とする請求項9に記載の方法。 13. 前記JTE領域は、接合部から外に向かってチャージレベルが減少するJTE を形成するための段階的マスキングと注入プロセスによって形成されることを特 徴とする請求項9に記載の方法。 14. p型JTE領域(4a-4d)を形成するためのイオンはアルミニウム、ボロンま たはガリウムであり、n型のJTE領域(4a-4d)のイオンは窒素である請求項13に記 載の方法。 15. 炭化珪素からなる第1の導電層(1)と、金属コンタクト層(2)とを有 しショットキー接続を構成する半導体装置を製作する方法であって、 −前記第1の導電層(1)の表面の上に第2層(4)をエピタキシアル成長させる ステップと −前記第2層(4)の中央部に前記第1層(1)に到達する溝(5)を蝕刻するス テップと、 −前記溝(5)にショットキー接触(2)を形成するステップと、 −前記第2層の厚さを外側に向かって漸減させる工程とを含むことを特徴とする 半導体装置の製造方法。 16. 外に向かって厚さが減少する複数の階段状ステップ(s1-s4)を形成する ために第2層(4)をエッチングすることを特徴とする請求項15に記載の方法。 17. 前記第2層(4)の厚さが、外に向かって漸減するように第2層を水平 方向に成長させる工程を含むことを特徴とする請求項15に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9700156A SE9700156D0 (sv) | 1997-01-21 | 1997-01-21 | Junction termination for Si C Schottky diode |
SE9700156-4 | 1997-01-21 | ||
PCT/SE1998/000082 WO1998032178A1 (en) | 1997-01-21 | 1998-01-21 | JUNCTION TERMINATION FOR SiC SCHOTTKY DIODE |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001508950A true JP2001508950A (ja) | 2001-07-03 |
JP5067985B2 JP5067985B2 (ja) | 2012-11-07 |
Family
ID=20405472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53423398A Expired - Lifetime JP5067985B2 (ja) | 1997-01-21 | 1998-01-21 | 半導体装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US5914500A (ja) |
EP (1) | EP0965146B1 (ja) |
JP (1) | JP5067985B2 (ja) |
AT (1) | ATE396502T1 (ja) |
DE (1) | DE69839511D1 (ja) |
SE (1) | SE9700156D0 (ja) |
WO (1) | WO1998032178A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006310791A (ja) * | 2005-03-30 | 2006-11-09 | Sanyo Electric Co Ltd | 半導体装置 |
JP2008252143A (ja) * | 2008-07-17 | 2008-10-16 | Mitsubishi Electric Corp | 半導体装置 |
WO2009116444A1 (ja) * | 2008-03-17 | 2009-09-24 | 三菱電機株式会社 | 半導体装置 |
JP2011135094A (ja) * | 2011-02-25 | 2011-07-07 | Sumitomo Electric Ind Ltd | 半導体装置およびその製造方法 |
JP2012178454A (ja) * | 2011-02-25 | 2012-09-13 | Fujitsu Ltd | 化合物半導体装置及びその製造方法 |
WO2013179729A1 (ja) * | 2012-05-31 | 2013-12-05 | 富士電機株式会社 | 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 |
CN103460386A (zh) * | 2011-04-05 | 2013-12-18 | 三菱电机株式会社 | 半导体装置及其制造方法 |
US9929232B2 (en) | 2016-03-16 | 2018-03-27 | Fuji Electric Co., Ltd. | Semiconductor device comprises two or more regions that have a same impurity concentration and differing carrier concentrations |
JP6861914B1 (ja) * | 2020-07-08 | 2021-04-21 | 三菱電機株式会社 | 半導体装置及び半導体装置の製造方法 |
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JP2001524756A (ja) * | 1997-11-24 | 2001-12-04 | フラウンホーファー−ゲゼルシャフト ツル フェルデング デル アンゲヴァンテン フォルシュング エー.ファー. | 半導体素子の最適化されたエッジ終端部 |
US6242784B1 (en) * | 1999-06-28 | 2001-06-05 | Intersil Corporation | Edge termination for silicon power devices |
US6373076B1 (en) | 1999-12-07 | 2002-04-16 | Philips Electronics North America Corporation | Passivated silicon carbide devices with low leakage current and method of fabricating |
FR2803103B1 (fr) | 1999-12-24 | 2003-08-29 | St Microelectronics Sa | Diode schottky sur substrat de carbure de silicium |
US6717229B2 (en) | 2000-01-19 | 2004-04-06 | Fabtech, Inc. | Distributed reverse surge guard |
US6642558B1 (en) * | 2000-03-20 | 2003-11-04 | Koninklijke Philips Electronics N.V. | Method and apparatus of terminating a high voltage solid state device |
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US6573128B1 (en) * | 2000-11-28 | 2003-06-03 | Cree, Inc. | Epitaxial edge termination for silicon carbide Schottky devices and methods of fabricating silicon carbide devices incorporating same |
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FR2832547A1 (fr) * | 2001-11-21 | 2003-05-23 | St Microelectronics Sa | Procede de realisation d'une diode schottky sur substrat de carbure de silicium |
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US20050259368A1 (en) * | 2003-11-12 | 2005-11-24 | Ted Letavic | Method and apparatus of terminating a high voltage solid state device |
US7407837B2 (en) * | 2004-01-27 | 2008-08-05 | Fuji Electric Holdings Co., Ltd. | Method of manufacturing silicon carbide semiconductor device |
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US7812441B2 (en) | 2004-10-21 | 2010-10-12 | Siliconix Technology C.V. | Schottky diode with improved surge capability |
US7394158B2 (en) * | 2004-10-21 | 2008-07-01 | Siliconix Technology C.V. | Solderable top metal for SiC device |
US7304363B1 (en) | 2004-11-26 | 2007-12-04 | United States Of America As Represented By The Secretary Of The Army | Interacting current spreader and junction extender to increase the voltage blocked in the off state of a high power semiconductor device |
JP4186919B2 (ja) * | 2004-12-07 | 2008-11-26 | 三菱電機株式会社 | 半導体装置 |
US9419092B2 (en) * | 2005-03-04 | 2016-08-16 | Vishay-Siliconix | Termination for SiC trench devices |
US7834376B2 (en) * | 2005-03-04 | 2010-11-16 | Siliconix Technology C. V. | Power semiconductor switch |
US8901699B2 (en) | 2005-05-11 | 2014-12-02 | Cree, Inc. | Silicon carbide junction barrier Schottky diodes with suppressed minority carrier injection |
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Also Published As
Publication number | Publication date |
---|---|
EP0965146A1 (en) | 1999-12-22 |
ATE396502T1 (de) | 2008-06-15 |
DE69839511D1 (de) | 2008-07-03 |
SE9700156D0 (sv) | 1997-01-21 |
EP0965146B1 (en) | 2008-05-21 |
JP5067985B2 (ja) | 2012-11-07 |
WO1998032178A1 (en) | 1998-07-23 |
US5914500A (en) | 1999-06-22 |
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