JP5653598B2 - 低底面転位バルク成長SiCウェハ - Google Patents
低底面転位バルク成長SiCウェハ Download PDFInfo
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- JP5653598B2 JP5653598B2 JP2009154425A JP2009154425A JP5653598B2 JP 5653598 B2 JP5653598 B2 JP 5653598B2 JP 2009154425 A JP2009154425 A JP 2009154425A JP 2009154425 A JP2009154425 A JP 2009154425A JP 5653598 B2 JP5653598 B2 JP 5653598B2
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- C30B23/00—Single-crystal growth by condensing evaporated or sublimed materials
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- C30B29/10—Inorganic compounds or compositions
- C30B29/36—Carbides
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- H10D30/00—Field-effect transistors [FET]
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- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
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- H10D62/83—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge
- H10D62/832—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge being Group IV materials comprising two or more elements, e.g. SiGe
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- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/29—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by the substrates
- H10P14/2901—Materials
- H10P14/2902—Materials being Group IVA materials
- H10P14/2904—Silicon carbide
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- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/34—Deposited materials, e.g. layers
- H10P14/3402—Deposited materials, e.g. layers characterised by the chemical composition
- H10P14/3414—Deposited materials, e.g. layers characterised by the chemical composition being group IIIA-VIA materials
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Description
本発明は、低欠陥シリコンカーバイドウェハおよび半導体用途のための前駆体としてのその使用と、大型高品質シリコンカーバイド単結晶のシード昇華成長とに関する。
一つの局面において、本発明は、SiCの高品質単結晶ウェハであり、該高品質単結晶ウェハは、少なくとも約3インチ(75mm)の直径と、約200cm−2未満の底面転位密度を有する少なくとも1平方インチ(6.25cm2)の連続した表面領域とを有する。
本発明は、高品質シリコンカーバイドウェハに関する。特に、本発明は、シード昇華を用いるこのようなウェハの成長を改善するための幾つかの技術を組み込んでいる。
Claims (13)
- 3C、4H、6H、2H、および15Rのポリタイプからなる群から選択されたポリタイプと、少なくとも75mmの直径と、X線トポグラフを使用して観察された275cm/cm3未満の全ライン長さに相当する44cm−2未満の底面転位密度を有する少なくとも0.25cm2の連続した表面領域とを有するSiCの高品質単結晶のウェハであって、
少なくとも75mmの直径の3C、4H、6H、2H、および15Rのポリタイプからなる群から選択される、単結晶のシリコンカーバイト・シード結晶を、
4度のカットオフ角度となるように、シードホルダーに取り付けられて、サセプタに取り付けられるステップと、
2000℃から2500℃の間の温度でシード昇華成長を実施するステップと、
少なくとも75mmの直径を有するSiCブールを形成するステップと、
前記温度を1900℃未満にまで低下させて、圧力を400Torrより高く上昇させることによって、前記シード昇華成長を終了するステップと、
0001平面に対して該SiCブールをスライスして、研磨して、ウェハにするステップとを包含するSiCの高品質単結晶のウェハを形成する方法によって
製造されたことを特徴とするSiCの高品質単結晶のウェハ。 - 請求項1に記載のSiCの高品質単結晶のウェハと、当該SiCの高品質単結晶のウェハの表面上にIII族窒化物エピタキシャル層とを備える、半導体デバイス前駆体ウェハ。
- 前記III族窒化物層は、GaN、AlGaN、AlN、AlInGaN、InN、AlInN、およびこれらの混合物からなる群から選択されている、請求項2に記載の半導体デバイス前駆体ウェハ。
- 前記ウェハの前記表面上に配置された複数の接合電界効果トランジスタをさらに備える、請求項3に記載の半導体デバイス前駆体ウェハ。
- 前記ウェハの前記表面上に配置された複数のヘテロ電界効果トランジスタをさらに備える、請求項3に記載の半導体デバイス前駆体ウェハ。
- 前記ウェハの前記表面上に配置された複数のダイオードをさらに備える、請求項3に記載の半導体デバイス前駆体ウェハ。
- 請求項2に記載の半導体デバイス前駆体ウェハと、
該ウェハのいくつかの部分上に配置された複数のIII族窒化物エピタキシャル層と
を備える、複数の半導体デバイス前駆体。 - 前記ウェハは、互いに反対側に位置する第一および第二の表面を有し、
前記複数のデバイス前駆体のそれぞれは、
基板上に配置されたエピタキシャル層であって、該エピタキシャル層を第一の導電型にするある濃度の適切なドーパント原子と、個々のソース部分、チャネル部分、およびドレイン部分とを有する、前記エピタキシャル層と、
該チャネル部分上の金属酸化物層と、
該金属酸化物層上の金属ゲートコンタクトであって、バイアスが該金属ゲートコンタクトに印加されたとき、活性チャネルを形成する前記金属ゲートコンタクトと
を備える、請求項7に記載の複数の半導体デバイス前駆体。 - 前記ウェハは、互いに反対側に位置するそれぞれの第一および第二の表面を有し、
前記複数の半導体デバイス前駆体のそれぞれは、
前記基板上の導電性チャネルと、
該導電性チャネル上のソースおよびドレインと、
該導電性チャネル上の該ソースと該ドレインとの間の金属ゲートコンタクトであって、
バイアスが該金属ゲートコンタクトに印加されたとき、活性チャネルを形成する金属ゲートコンタクトと
を備える、請求項7に記載の複数の半導体デバイス前駆体。 - SiCの高品質単結晶のウェハを形成する方法であって、
少なくとも75mmの直径の単結晶のシリコンカーバイト・シード結晶をシードホルダーに取り付けられて、サセプタに取り付けられるステップと、
2000℃から2500℃の間の温度でシード昇華成長を実施するステップと、
少なくとも75mmの直径を有するSiCブールを形成するステップと、
前記温度を1900℃未満にまで低下させて、圧力を400Torrより高く上昇させることによって、前記シード昇華成長を終了するステップと、
0001平面に対して該SiCブールをスライスして、ウェハにするステップであって、該ウェハは、該ウェハ上に、X線トポグラフを使用して観察された275cm/cm3未満の全ライン長さに相当する44cm−2未満の底面転位密度を有する少なくとも0.25cm2の連続した表面領域を有する、前記ウェハにするステップと
を包含する、方法。 - 前記ウェハでは、前記少なくとも0.25cm2の連続した表面領域が、44cm−2未満の底面転位密度を有し、前記ウェハが4度のカットオフ角度で製造される請求項10に記載の方法。
- 前記ウェハを研磨するステップをさらに包含する、請求項10に記載の方法。
- 前記シード結晶と前記ウェハのポリタイプは、3C、4H、6H、2H、および15Rのポリタイプからなる群から選択される、請求項10に記載の方法。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/147,645 | 2005-06-08 | ||
| US11/147,645 US7294324B2 (en) | 2004-09-21 | 2005-06-08 | Low basal plane dislocation bulk grown SiC wafers |
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| JP2008514631A Division JP2008542181A (ja) | 2005-06-08 | 2006-04-05 | 低底面転位バルク成長SiCウェハ |
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| JP2010006699A JP2010006699A (ja) | 2010-01-14 |
| JP5653598B2 true JP5653598B2 (ja) | 2015-01-14 |
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| JP2008514631A Pending JP2008542181A (ja) | 2005-06-08 | 2006-04-05 | 低底面転位バルク成長SiCウェハ |
| JP2008184963A Pending JP2008290938A (ja) | 2005-06-08 | 2008-07-16 | 低底面転位バルク成長SiCウェハ |
| JP2009154425A Active JP5653598B2 (ja) | 2005-06-08 | 2009-06-29 | 低底面転位バルク成長SiCウェハ |
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| JP2008184963A Pending JP2008290938A (ja) | 2005-06-08 | 2008-07-16 | 低底面転位バルク成長SiCウェハ |
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| US (1) | US7294324B2 (ja) |
| EP (1) | EP1888821B1 (ja) |
| JP (3) | JP2008542181A (ja) |
| CN (1) | CN101194052B (ja) |
| TW (1) | TWI343423B (ja) |
| WO (1) | WO2006135476A1 (ja) |
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-
2005
- 2005-06-08 US US11/147,645 patent/US7294324B2/en not_active Expired - Lifetime
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2006
- 2006-04-05 WO PCT/US2006/012929 patent/WO2006135476A1/en not_active Ceased
- 2006-04-05 EP EP06749466.6A patent/EP1888821B1/en not_active Revoked
- 2006-04-05 JP JP2008514631A patent/JP2008542181A/ja active Pending
- 2006-04-05 CN CN2006800202948A patent/CN101194052B/zh active Active
- 2006-04-07 TW TW095112542A patent/TWI343423B/zh active
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2008
- 2008-07-16 JP JP2008184963A patent/JP2008290938A/ja active Pending
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- 2009-06-29 JP JP2009154425A patent/JP5653598B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008290938A (ja) | 2008-12-04 |
| TWI343423B (en) | 2011-06-11 |
| EP1888821A1 (en) | 2008-02-20 |
| CN101194052B (zh) | 2012-05-30 |
| US7294324B2 (en) | 2007-11-13 |
| CN101194052A (zh) | 2008-06-04 |
| TW200700596A (en) | 2007-01-01 |
| EP1888821B1 (en) | 2014-11-19 |
| JP2008542181A (ja) | 2008-11-27 |
| WO2006135476A1 (en) | 2006-12-21 |
| JP2010006699A (ja) | 2010-01-14 |
| US20060075958A1 (en) | 2006-04-13 |
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