KR100737494B1 - 산화물 소결체, 스퍼터링 타겟, 투명 도전성 박막 및 그제조방법 - Google Patents
산화물 소결체, 스퍼터링 타겟, 투명 도전성 박막 및 그제조방법 Download PDFInfo
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- KR100737494B1 KR100737494B1 KR1020050034356A KR20050034356A KR100737494B1 KR 100737494 B1 KR100737494 B1 KR 100737494B1 KR 1020050034356 A KR1020050034356 A KR 1020050034356A KR 20050034356 A KR20050034356 A KR 20050034356A KR 100737494 B1 KR100737494 B1 KR 100737494B1
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Abstract
Description
Claims (17)
- 인듐, 텅스텐 및 아연으로 이루어지고, 텅스텐이 W/In 원자수비로 0.004 내지 0.023의 비율로 함유되며, 아연이 Zn/In 원자수비로 0.004 내지 0.10O의 비율로 함유되고, 또한 비저항이 1 kΩcm 이하인 것을 특징으로 하는 산화물 소결체.
- 인듐, 텅스텐, 아연 및 은으로 이루어지고, 텅스텐이 W/In 원자수비로 0.004 내지 0.023의 비율로 함유되며, 아연이 Zn/In 원자수비로 0.004 내지 0.100의 비율로 함유되고, 은이 Ag/In 원자수비로 0.001 내지 0.010의 비율로 함유되며, 또한 비저항이 1 kΩcm 이하인 것을 특징으로 하는 산화물 소결체.
- 제 1항 또는 제 2항에 있어서,비저항이 1 × 10-1 Ωcm 이하인 것을 특징으로 하는 산화물 소결체.
- 제 1항 또는 제 2항에 있어서,빅스바이트형 구조의 산화인듐 결정상을 포함하는 것을 특징으로 하는 산화물 소결체.
- 제 1항 또는 제 2항에 있어서,텅스텐과 아연, 또는 텅스텐과 아연 및 은이, 빅스바트형 구조의 산화인듐의 인듐위치를 치환하여 고용체를 형성하고 있는 것을 특징으로 하는 산화물 소결체.
- 제 1항 또는 제 2항에 있어서,소결체 밀도가 6.2 g/㎤ 이상인 것을 특징으로 하는 산화물 소결체.
- 제 1항 또는 제 2항에 있어서,상기 산화인듐 결정상의 결정 입자지름의 평균값이 10㎛ 이하인 것을 특징으로 하는 산화물 소결체.
- 제 1항 또는 제 2항에 기재된 산화물 소결체를 평판형상으로 가공하여 냉각용 금속판에 접합한 것을 특징으로 하는 스퍼터링 타겟.
- 제 8항에 있어서,스퍼터링 면의 최대 높이(Rz)가 3.0㎛ 이하인 것을 특징으로 하는 스퍼터링 타겟.
- 제 8항에 기재된 스퍼터링 타겟을 사용하여 기판상에 성막한 비정질의 투명 도전성 박막에 있어서, 막의 내부 응력의 절대값이 1 × 1010 dyn/㎠ 이하이고, 비저항이 9 × 10-4 Ωcm 이하인 것을 특징으로 하는 투명 도전성 박막.
- 평균 입자지름이 1㎛ 이하의 In2O3 분말, 평균 입자지름이 1㎛ 이하의 WO3 분말 및 평균 입자지름이 1㎛ 이하의 ZnO 분말을, 텅스텐이 W/In 원자수비로 0.004 내지 0.023의 비율, 아연이 Zn/In 원자수비로 0.004 내지 0.100의 비율이 되도록 조합하고, 10 내지 30시간 혼합하여 얻어진 분말을 평균 입자지름 20 내지 150 ㎛가 될 때까지 펠릿화하고, 얻어진 펠릿가루를 냉간 정수압 프레스로 2 내지 5 ton/㎠의 압력을 가하여 성형하여 얻어진 성형체를 노 내 용적 0.1㎥ 당 50 내지 250 리터/분의 비율로 소결로 내의 대기에 산소를 도입하는 분위기에서 1200 내지 1500℃로 10 내지 40시간 소결시키는 것을 특징으로 하는 산화물 소결체의 제조방법.
- 제 11항에 있어서,상기 소결공정에 있어서, 0.5 내지 3.0 ℃/분으로 승온하고, 소결후의 냉각에 있어서 산소도입을 정지한 후, 1000℃까지를 0.1 내지 1 ℃/분으로 강온하는 것을 특징으로 하는 산화물 소결체의 제조방법.
- 제 11항 또는 제 12항에 있어서,얻어진 산화물 소결체를, 다시 비산화성 분위기하에서 가열하여 환원처리를 실시하는 것을 특징으로 하는 산화물 소결체의 제조방법.
- 제 11항 또는 제 12항의 제조방법에 의하여 얻어진 산화물 소결체를 평판형상으로 가공하여, 최대 높이(Rz)가 3.0 ㎛ 이하가 되도록 스퍼터링 면을 연마한 후, 냉각용 금속판에 접합하는 것을 특징으로 하는 스퍼터링 타겟의 제조방법.
- 제 14항의 제조방법에 의하여 얻어진 스퍼터링 타겟을 사용하여, 스퍼터링법으로 기판상에 비정질의 투명 도전성 박막을 성막하는 방법에 있어서, 스퍼터링시의 타겟 기판간 거리를 80 mm 내지 150 mm로 하고, 스퍼터링 가스압을 0.8 Pa 내지 1.5 Pa로 하여 성막하는 것을 특징으로 하는 비정질의 투명 도전성 박막의 제조방법.
- 제 15항에 있어서,상기 스퍼터링법이 직류 스퍼터링법인 것을 특징으로 하는 투명 도전성 박막의 제조방법.
- 제 15항에 있어서,상기 스퍼터링 가스로서, 순 Ar 가스에 O2 가스를 0 초과 15% 이하의 범위에서 혼합시킨 가스를 사용하여 얻어지는 투명 도전성 박막의 비저항이 9 × 10-4Ωcm 이하가 되게 하는 것을 특징으로 하는 투명 도전성 박막의 제조방법.
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