JP7380872B2 - 横型熱処理炉を用いたシリコンウェーハの熱処理方法 - Google Patents
横型熱処理炉を用いたシリコンウェーハの熱処理方法 Download PDFInfo
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- 235000012431 wafers Nutrition 0.000 title claims description 186
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 121
- 229910052710 silicon Inorganic materials 0.000 title claims description 121
- 239000010703 silicon Substances 0.000 title claims description 121
- 238000010438 heat treatment Methods 0.000 title claims description 89
- 238000000034 method Methods 0.000 title claims description 49
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 35
- 238000002791 soaking Methods 0.000 description 24
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 238000000926 separation method Methods 0.000 description 11
- 230000007423 decrease Effects 0.000 description 10
- 230000003749 cleanliness Effects 0.000 description 8
- 238000005530 etching Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 229910052723 transition metal Inorganic materials 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 238000011109 contamination Methods 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- 239000002019 doping agent Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008021 deposition Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
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- C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure
- C30B33/02—Heat treatment
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- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
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- H01L21/18—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 comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/22—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities
- H01L21/225—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities using diffusion into or out of a solid from or into a solid phase, e.g. a doped oxide layer
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- H01L21/18—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 comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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Description
[1]横方向の中心軸(X)を有する円筒形状の炉芯管(12)と、前記炉芯管(12)の周囲に位置し前記炉芯管(12)を加熱するヒーター(14)と、を有し、前記炉芯管(12)の片方の端部には蓋(12A)が設けられ、前記炉芯管(12)の他方の端部にはガス導入口(12B)が設けられ、前記炉芯管(12)の前記蓋(12A)の付近の炉壁にガス排気口(12C)が設けられた横型熱処理炉(100)を用意し、
前記炉芯管(12)の前記蓋(12A)に近い方を炉口側(H)とし、前記炉芯管(12)の前記ガス導入口(12B)に近い方を炉奥側(S)としたとき、前記蓋(12A)を開けて、前記炉芯管(12)内に、以下の(A)~(C)の状態となるようにボート(16)を配置し、
(A)前記ボート(16)上に、主面が前記炉芯管(12)の中心軸(X)に直交するように複数枚のシリコンウェーハが並べられて、ウェーハ群(WF)を形成し、
(B)前記ボート(16)上の、前記ウェーハ群(WF)よりも炉奥側(S)に、前記炉芯管(12)の中心軸(X)と平行な軸を有する円柱形状の第1ダミーブロック(18S)が配置され、前記ウェーハ群(WF)よりも炉口側(H)に、前記炉芯管(12)の中心軸(X)と平行な軸を有する円柱形状の第2ダミーブロック(18H)が配置され、
(C)前記ボート(16)上の、前記第1ダミーブロック(18S)と前記ウェーハ群(WF)との間に第1追加ブロック(20S)、及び、前記第2ダミーブロック(18H)と前記ウェーハ群(WF)との間に第2追加ブロック(20H)、のうち少なくとも一方が配置され、前記第1及び第2追加ブロック(20S,20H)は、(i)前記炉芯管(12)の中心軸(X)に垂直な仮想面への投影形状が、前記第1及び第2ダミーブロック(18S,18H)並びに前記複数枚のシリコンウェーハの前記仮想面への投影形状を包含し、前記炉芯管(12)の中心軸(X)と平行な軸を有する柱形状であり、かつ、(ii)Feの濃度が1×1011atoms/cm3未満であり、Ni及びCuの濃度がそれぞれ5×1010atoms/cm3未満であり、
前記蓋(12A)を閉め、
前記ガス導入口(12B)から前記炉芯管(12)内にガスを導入し、前記ガス排気口(12C)から前記ガスを排気しつつ、前記ヒーター(14)により前記炉芯管(12)を加熱することで、前記複数枚のシリコンウェーハ(WF)に熱処理を施す、
横型熱処理炉を用いたシリコンウェーハの熱処理方法。
熱処理の後、全てのシリコンウェーハのうち最も炉奥側のシリコンウェーハを「モニターウェーハS1」、最も炉口側のシリコンウェーハを「モニターウェーハH1」として、これらのモニターウェーハのライフタイムを一般的なμ-PCD法により測定した。比較例1のライフタイムを基準とした相対値を表1に示した。
10 均熱管
10A 扉
10B 開口部
10C 吸引口
12 炉芯管
12A 蓋
12B ガス導入口
12C ガス排気口
14 ヒーター
16 ボート
16A ポケット
18S 第1ダミーブロック(保温ブロック)
18H 第2ダミーブロック(保温ブロック)
20S 第1追加ブロック(遮蔽ブロック)
20H 第2追加ブロック(遮蔽ブロック)
22S 第3追加ブロック(遮蔽ブロック)
22H 第4追加ブロック(遮蔽ブロック)
S 炉奥側(ガス流入側)
H 炉口側(ガス流出側)
WF ウェーハ群(複数枚のシリコンウェーハ)
X 炉芯管の中心軸
Claims (10)
- 横方向の中心軸を有する円筒形状の炉芯管と、前記炉芯管の周囲に位置し前記炉芯管を加熱するヒーターと、を有し、前記炉芯管の片方の端部には蓋が設けられ、前記炉芯管の他方の端部にはガス導入口が設けられ、前記炉芯管の前記蓋の付近の炉壁にガス排気口が設けられた横型熱処理炉を用意し、
前記炉芯管の前記蓋に近い方を炉口側とし、前記炉芯管の前記ガス導入口に近い方を炉奥側としたとき、前記蓋を開けて、前記炉芯管内に、以下の(A)~(C)の状態となるようにボートを配置し、
(A)前記ボート上に、主面が前記炉芯管の中心軸に直交するように複数枚のシリコンウェーハが並べられて、ウェーハ群を形成し、
(B)前記ボート上の、前記ウェーハ群よりも炉奥側に、前記炉芯管の中心軸と平行な軸を有する円柱形状の第1ダミーブロックが配置され、前記ウェーハ群よりも炉口側に、前記炉芯管の中心軸と平行な軸を有する円柱形状の第2ダミーブロックが配置され、前記第1及び第2ダミーブロックが、Fe、Ni、及びCuの濃度のいずれかが1×10 11 atoms/cm 3 以上であるシリコンからなり、
(C)前記ボート上の、前記第1ダミーブロックと前記ウェーハ群との間に第1追加ブロック、及び、前記第2ダミーブロックと前記ウェーハ群との間に第2追加ブロック、のうち少なくとも一方が配置され、前記第1及び第2追加ブロックは、(i)前記炉芯管の中心軸に垂直な仮想面への投影形状が、前記第1及び第2ダミーブロック並びに前記複数枚のシリコンウェーハの前記仮想面への投影形状を包含し、前記炉芯管の中心軸と平行な軸を有する柱形状であり、かつ、(ii)Feの濃度が1×1011atoms/cm3未満であり、Ni及びCuの濃度がそれぞれ5×1010atoms/cm3未満であるシリコンからなり、
前記蓋を閉め、
前記ガス導入口から前記炉芯管内にガスを導入し、前記ガス排気口から前記ガスを排気しつつ、前記ヒーターにより前記炉芯管を加熱することで、前記複数枚のシリコンウェーハに熱処理を施す、
横型熱処理炉を用いたシリコンウェーハの熱処理方法。 - 前記(C)において、前記第1及び第2追加ブロックの両方が配置される、請求項1に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記第1及び第2追加ブロックの前記仮想面への投影形状のうち、前記ボートよりも上方の部分は、前記複数枚のシリコンウェーハの半径よりも5mm以上大きな曲率半径を有する、請求項1又は2に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記第1及び第2追加ブロックの、前記炉芯管の中心軸に沿った幅が、10~20mmの範囲内である、請求項1~3のいずれか一項に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記(C)において、前記ボート上の、前記第1ダミーブロックよりも炉奥側に第3追加ブロック、及び、前記第2ダミーブロックよりも炉口側に第4追加ブロック、のうち少なくとも一方が配置され、前記第3及び第4追加ブロックは、前記(i)及び(ii)を満たす、請求項1~4のいずれか一項に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記(C)において、前記第3及び第4追加ブロックの両方が配置される、請求項5に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記第3及び第4追加ブロックの前記仮想面への投影形状のうち、前記ボートよりも上方の部分は、前記複数枚のシリコンウェーハの半径よりも5mm以上大きな曲率半径を有する、請求項5又は6に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記第3及び第4追加ブロックの、前記炉芯管の中心軸に沿った幅が、10~20mmの範囲内である、請求項5~7のいずれか一項に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記第1及び第2ダミーブロックの直径が、前記複数枚のシリコンウェーハの直径と等しい、請求項1~8のいずれか一項に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
- 前記第1及び第2ダミーブロックの、前記炉芯管の中心軸に沿った幅が、40~75mmの範囲内である、請求項1~9のいずれか一項に記載の横型熱処理炉を用いたシリコンウェーハの熱処理方法。
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Citations (4)
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JP2005340597A (ja) | 2004-05-28 | 2005-12-08 | Toshiba Ceramics Co Ltd | シリコンウェーハ熱処理用ボート |
JP2006005214A (ja) | 2004-06-18 | 2006-01-05 | Sumco Corp | シリコンウエーハの熱処理方法 |
JP2006049360A (ja) | 2004-07-30 | 2006-02-16 | Denso Corp | 熱処理装置 |
JP2007059606A (ja) | 2005-08-24 | 2007-03-08 | Toshiba Ceramics Co Ltd | 縦型ウエハボート及び縦型熱処理炉 |
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JPS63126219A (ja) * | 1986-11-14 | 1988-05-30 | Nec Kansai Ltd | 半導体ウエ−ハの熱処理方法 |
JPH0385725A (ja) * | 1989-08-30 | 1991-04-10 | Shin Etsu Handotai Co Ltd | ウェーハの熱処理方法 |
JP3143712B2 (ja) * | 1991-05-01 | 2001-03-07 | 東芝セラミックス株式会社 | 半導体ウェーハの拡散処理用ボート |
JPH0927504A (ja) * | 1995-07-13 | 1997-01-28 | Sony Corp | 半導体装置の製造方法 |
US5961725A (en) * | 1997-10-21 | 1999-10-05 | Taiwan Semiconductor Manufacturing Company, Ltd. | Conical baffle for semiconductor furnaces |
US7972703B2 (en) * | 2005-03-03 | 2011-07-05 | Ferrotec (Usa) Corporation | Baffle wafers and randomly oriented polycrystalline silicon used therefor |
US8008198B1 (en) * | 2008-09-30 | 2011-08-30 | Stion Corporation | Large scale method and furnace system for selenization of thin film photovoltaic materials |
CN105870034B (zh) * | 2016-05-11 | 2018-06-26 | 上海华虹宏力半导体制造有限公司 | 多晶硅炉管沉积厚度监控装置及方法 |
JP6980125B2 (ja) * | 2018-09-25 | 2021-12-15 | 株式会社Kokusai Electric | 基板処理装置及び半導体装置の製造方法 |
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JP2005340597A (ja) | 2004-05-28 | 2005-12-08 | Toshiba Ceramics Co Ltd | シリコンウェーハ熱処理用ボート |
JP2006005214A (ja) | 2004-06-18 | 2006-01-05 | Sumco Corp | シリコンウエーハの熱処理方法 |
JP2006049360A (ja) | 2004-07-30 | 2006-02-16 | Denso Corp | 熱処理装置 |
JP2007059606A (ja) | 2005-08-24 | 2007-03-08 | Toshiba Ceramics Co Ltd | 縦型ウエハボート及び縦型熱処理炉 |
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EP4163425A4 (en) | 2024-07-10 |
KR20230003563A (ko) | 2023-01-06 |
JPWO2021246024A1 (ja) | 2021-12-09 |
CN115699258A (zh) | 2023-02-03 |
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TWI762269B (zh) | 2022-04-21 |
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