KR102311321B1 - 실리콘 단결정의 제조 방법 및 에피택셜 실리콘 웨이퍼의 제조 방법 - Google Patents
실리콘 단결정의 제조 방법 및 에피택셜 실리콘 웨이퍼의 제조 방법 Download PDFInfo
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 274
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 274
- 239000010703 silicon Substances 0.000 title claims abstract description 274
- 239000013078 crystal Substances 0.000 title claims abstract description 210
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 68
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims description 61
- 238000010438 heat treatment Methods 0.000 claims description 46
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 34
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 26
- 239000001257 hydrogen Substances 0.000 claims description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims description 26
- 229910052786 argon Inorganic materials 0.000 claims description 17
- 238000000137 annealing Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 11
- 239000012298 atmosphere Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000001965 increasing effect Effects 0.000 claims description 5
- 235000012431 wafers Nutrition 0.000 description 81
- 238000007711 solidification Methods 0.000 description 21
- 230000008023 solidification Effects 0.000 description 21
- 239000002019 doping agent Substances 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 239000010453 quartz Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000000155 melt Substances 0.000 description 6
- 229910052732 germanium Inorganic materials 0.000 description 5
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- SLLGVCUQYRMELA-UHFFFAOYSA-N chlorosilicon Chemical compound Cl[Si] SLLGVCUQYRMELA-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 1
- 239000005052 trichlorosilane Substances 0.000 description 1
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Abstract
Description
도 2는 상기 실험 1에 있어서의 고화율(solidification rate)과 570℃±70℃에서의 체재 시간의 관계를 나타내는 그래프이다.
도 3은 도 2에 있어서의 고화율이 50% 이상인 결과를 확대하여 나타내는 그래프이다.
도 4는 상기 실리콘 단결정의 제조 조건을 유도하기 위한 실험 2의 결과이며, 에피택셜 실리콘 웨이퍼의 전기 저항률과 LPD 밀도의 관계를 나타내는 그래프이다.
도 5는 본 발명의 일 실시 형태에 따른 단결정 인상 장치의 개략 구성을 나타내는 모식도이다.
도 6은 본 발명의 변형예에 있어서의 멀티 인상법에 의한 단결정의 제조 방법을 나타내는 모식도이다.
도 7은 본 발명의 다른 변형예에 있어서의 발취(拔取) 인상법에 의한 단결정의 제조 방법을 나타내는 모식도이다.
도 8은 본 발명의 또 다른 변형예에 있어서의 히터(애프터히터)의 설치 효과를 나타내는 그래프로서, 고화율과 단결정 중심의 온도의 관계를 나타내는 그래프이다.
도 9는 상기 또 다른 변형예에 있어서의 히터(애프터히터)의 설치 효과를 나타내는 그래프로서, 고화율과 570℃±70℃에서의 체재 시간의 관계를 나타내는 그래프이다.
4 : 실리콘 융액
6 : 실리콘 단결정
30 : 챔버
31 : 도가니
32 : 가열부
33 : 인상 케이블(인상부)
41 : 도펀트 첨가 융액
62 : 직동부
Claims (8)
- 챔버와,
상기 챔버 내에 배치되고, 실리콘 융액에 적린을 첨가한 도펀트 첨가 융액을 수납 가능한 도가니와,
상기 도가니를 가열하는 가열부와,
종자 결정을 상기 도펀트 첨가 융액에 접촉시킨 후에 인상하는 인상부를 구비한 단결정 인상 장치를 이용한 실리콘 단결정의 제조 방법으로서,
상기 실리콘 단결정의 전기 저항률이 0.5mΩ·㎝ 이상 0.7mΩ·㎝ 미만이 되도록, 상기 실리콘 융액에 상기 적린을 첨가하고, 상기 실리콘 단결정을 인상하는 단결정 형성 공정과,
상기 실리콘 단결정을 냉각하는 냉각 공정을 구비하고,
상기 냉각 공정은, 상기 실리콘 단결정을 상기 도펀트 첨가 융액으로부터 떼어낸 후, 180분 이내에 상기 실리콘 단결정을 400㎜ 이상 상승시키고,
상기 상승 시의 상기 가열부의 파워를, 상기 실리콘 단결정을 상기 도펀트 첨가 융액으로부터 떼어내기 전, 상기 실리콘 단결정을 상기 도펀트 첨가 융액으로부터 떼어냄과 동시, 상기 실리콘 단결정을 상기 도펀트 첨가 융액으로부터 떼어낸 후의, 어느 것의 타이밍에서 상기 냉각 공정의 개시 직전의 가열부의 파워의 50% 이하로 하는 것을 특징으로 하는 실리콘 단결정의 제조 방법. - 제1항에 있어서,
상기 단결정 형성 공정은, 상기 실리콘 단결정의 직동부(straight body)의 적어도 일부의 영역에 있어서의 온도가 570℃±70℃의 범위 내가 되는 시간이 10분 이상 50분 이하가 되도록, 상기 실리콘 단결정을 인상하는 것을 특징으로 하는 실리콘 단결정의 제조 방법. - 제1항 또는 제2항에 기재된 실리콘 단결정의 제조 방법으로 제조된 실리콘 단결정으로부터 실리콘 웨이퍼를 잘라내는 웨이퍼 잘라냄 공정과,
상기 실리콘 웨이퍼를 수소 분위기 중에서 가열하는 수소 베이킹 공정과,
상기 실리콘 웨이퍼 상에 에피택셜막을 형성하는 에피택셜막 형성 공정을 구비하고 있는 것을 특징으로 하는 에피택셜 실리콘 웨이퍼의 제조 방법. - 제3항에 있어서,
상기 수소 베이킹 공정 전의 상기 실리콘 웨이퍼에 대하여, 1200℃ 이상 1220℃ 이하의 아르곤 가스 분위기 중에서 60분 이상 120분 이하의 열처리를 행하는 아르곤 어닐링 공정을 구비하고 있는 것을 특징으로 하는 에피택셜 실리콘 웨이퍼의 제조 방법. - 삭제
- 삭제
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