The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1999
Filed:
Jan. 13, 1997
Applicant:
Inventor:
Hiroyuki Hamada, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; G01N / ; G01R / ;
U.S. Cl.
CPC ...
382145 ; 324751 ; 250310 ;
Abstract
An electron pulse signal is repeatedly radiated on a target spot applied with a certain potential for measuring a variation of secondary electron intensity, and a discrete value is assigned to each variation between the two secondary electron intensities so as to eliminate an electrical influence of an insulating passivation layer over the target spot from a potential contrast image.