KR0174868B1 - 제만 레이저를 이용한 스테퍼 웨이퍼의 정렬장치 - Google Patents
제만 레이저를 이용한 스테퍼 웨이퍼의 정렬장치 Download PDFInfo
- Publication number
- KR0174868B1 KR0174868B1 KR1019940033475A KR19940033475A KR0174868B1 KR 0174868 B1 KR0174868 B1 KR 0174868B1 KR 1019940033475 A KR1019940033475 A KR 1019940033475A KR 19940033475 A KR19940033475 A KR 19940033475A KR 0174868 B1 KR0174868 B1 KR 0174868B1
- Authority
- KR
- South Korea
- Prior art keywords
- light
- alignment
- laser
- wafer
- signal
- Prior art date
Links
- 238000000034 method Methods 0.000 claims abstract description 36
- 230000010287 polarization Effects 0.000 claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 2
- 230000008859 change Effects 0.000 description 26
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000035559 beat frequency Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007261 regionalization Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7088—Alignment mark detection, e.g. TTR, TTL, off-axis detection, array detector, video detection
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7049—Technique, e.g. interferometric
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7069—Alignment mark illumination, e.g. darkfield, dual focus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims (4)
- 레이저 광을 웨이퍼 상의 소정의 정렬용 마크에 입사시키고 그 정렬용 마크에서 반사되는 회절광을 검출하여 웨이퍼를 정렬시키는 광-헤테로다인 간섭방법을 이용한 웨이퍼 정렬장치에 있어서, 상이한 주파수를 가지는 두 광파를 발생하는 레이저 광원과, 상기 레이저 광원에서 나온 레이저 광을 축소 투영렌즈를 통해 상기 웨이퍼 위의 정렬마크에 입사시키는 제1렌즈수단, 상기 소정의 정렬용 마크에서 반사되어 상기 제1렌즈수단을 통해 회절광 처리를 위한 경로로 되돌아오는 회절광중에서 소정 차수의 회절광만을 통과시키고 두개의 편광성분의 광파를 분리하여 그 분리된 광파의 편광각도 조절하여 슬릿면에 간섭무늬를 형성시켜 슬릿을 통해 통과시키는 회절광 처리 수단, 상기 회절광 처리수단에서 출력되는 광 신호를 전기신호로 변환하는 변환수단, 상기 레이저 광원에서 출력되는 레이저 광신호와 상기 변환수단의 출력신호의 비교하는 수단, 상기 비교수단의 출력에 응답하여 상기 웨이퍼의 위치를 조절하기 위한 정렬제어신호를 발생하는 제어수단을 포함하고, 상기 레이저 광원은 제만(Zeeman) 주파수 안정화 레이저인 것을 특징으로 하는 웨이퍼 정렬장치.
- 제1항에 있어서, 상기 반사된 회절광을 처리하는 수단은, 상기 제1렌즈수단을 통해 상기 정렬마크로부터 반사되어 회절광 처리경로로 입사되는 회절광을 모아주는 렌즈(107)와, 그 렌즈(107)를 통과한 회절 신호광중 0차 회절광은 걸러지고 ±1차 회절광만을 통과시키는 공간필터(108)와, 상기 공간필터(108)를 통과한 ±1차 회절광을 각각 하나의 편광성분에 대해서만 통과시켜 서로 1.8MHz의 주파수 차이를 가지는 S-편광성분과 P-편광성분의 광신호로 분리하는 두개의 편광 프리즘(112a), (112b)과, 그 두개의 편광 프리즘(112a)(112b)을 통과한 두 광신호를 모아주는 집속렌즈(114)와, 그 집속렌즈(114)에 의해 모아지는 두개의 광신호가 동일한 편광각도를 가지도록 편광축에 대해서 일정한 편광각도로 조절하여 통과시키는 선편광자(116)와, 그 선편광자(116)를 통과한 동일한 편광각도를 가지는 두개의 광신호에 의해 형성되는 간섭무늬를 가지는 광신호를 슬릿을 통해 통과시켜 상기 변환수단에 입력시키는 슬릿면(118)으로 구성된 것을 특징으로 하는 웨이퍼 정렬장치.
- 제2항에 있어서, 상기 비교하는 수단은 상기 레이저 광과 상기 변환수단의 출력 간의 위상을 비교하는 위상 비교기인 것을 특징으로 하는 웨이퍼 정렬장치.
- 제2항에 있어서, 상기 선편광자가 가지는 편광축에 대한 일정한 각도는 45°인 것을 특징으로 하는 웨이퍼 정렬장치.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940033475A KR0174868B1 (ko) | 1994-12-09 | 1994-12-09 | 제만 레이저를 이용한 스테퍼 웨이퍼의 정렬장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940033475A KR0174868B1 (ko) | 1994-12-09 | 1994-12-09 | 제만 레이저를 이용한 스테퍼 웨이퍼의 정렬장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960026076A KR960026076A (ko) | 1996-07-20 |
KR0174868B1 true KR0174868B1 (ko) | 1999-04-01 |
Family
ID=19400858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019940033475A KR0174868B1 (ko) | 1994-12-09 | 1994-12-09 | 제만 레이저를 이용한 스테퍼 웨이퍼의 정렬장치 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0174868B1 (ko) |
-
1994
- 1994-12-09 KR KR1019940033475A patent/KR0174868B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR960026076A (ko) | 1996-07-20 |
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