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Optical techniques of measuring endpoint during the processing of material layers in an optically hostile environment 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01N-021/00
출원번호 US-0122207 (1993-09-16)
발명자 / 주소
  • Litvak Herbert E. (Cupertino CA)
출원인 / 주소
  • Luxtron Corporation (Campbell CA 02)
인용정보 피인용 횟수 : 90  인용 특허 : 0

초록

In a process of selectively removing material from an exposed layer carried by a substrate, a technique for determining endpoint by monitoring the intensity of a radiation beam that is passed through the substrate and any intervening layers to be reflected off the layer being processed. This monitor

대표청구항

A method of removing at least a portion of a layer that is carried on a first side of a substrate, comprising: applying a material removing substance to an exposed surface of said layer but not to a second side of the substrate opposite said first side, said substance being characterized by modifyin

이 특허를 인용한 특허 (90)

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