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:
Dec. 05, 2000
Filed:
Jan. 21, 1998
Applicant:
Inventor:
Chao-Yuan Huang, Hsinchu, TW;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F / ;
U.S. Cl.
CPC ...
430-5 ;
Abstract
A photo-mask and a method of fabricating the same. A photo-mask comprises a quartz glass substrate, on which a clear area, a grey area, and a dark area formed over the quartz glass substrate. Incident light penetrates through the clear area completely, but only part of the incident light will go through the grey area since the other part of the incident light is absorbed by the grey area, On the other hand, incident light is blocked by the dark area completely.