Invention Application
- Patent Title: Method and an apparatus of an inspection system using an electron beam
- Patent Title (中): 使用电子束的检查系统的方法和装置
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Application No.: US09883184Application Date: 2001-06-19
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Publication No.: US20010030294A1Publication Date: 2001-10-18
- Inventor: Yuko Iwabuchi , Hideo Todokoro , Hiroyoshi Mori , Mitsugu Sato , Yasutsugu Usami , Mikio Ichihashi , Satoru Fukuhara , Hiroyuki Shinada , Yutaka Kaneko , Katsuya Sugiyama , Atsuko Takafuji , Hiroshi Toyama
- Applicant: Hitachi, Ltd.
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Priority: JP9-212908 19970807
- Main IPC: G21K007/00
- IPC: G21K007/00 ; G01N023/00 ; G21G005/00 ; A61N005/00

Abstract:
Problems encountered in the conventional inspection method and the conventional apparatus adopting the method are solved by the present invention using an electron beam by providing a novel inspection method and an inspection apparatus adopting the novel method which are capable of increasing the speed to scan a specimen such as a semiconductor wafer. The inspection novel method provided by the present invention comprises the steps of: generating an electron beam; converging the generated electron beam on a specimen by using an objective lens; scanning the specimen by using the converged electron beam; continuously moving the specimen during scanning; detecting charged particles emanating from the specimen at a location between the specimen and the objective lens and converting the detected charged particles into an electrical signal; storing picture information conveyed by the electrical signal; comparing a picture with another by using the stored picture information; and detecting a defect of the specimen.
Public/Granted literature
- US06452178B2 Method and an apparatus of an inspection system using an electron beam Public/Granted day:2002-09-17
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