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. 08, 1994
Filed:
Jul. 29, 1993
Applicant:
Inventor:
Chris A Mack, Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ; G03B / ;
U.S. Cl.
CPC ...
355 68 ; 355 53 ;
Abstract
An apparatus and method is provided for measuring photoresist parameters in situ is disclosed. Transmission and reflectivity detectors are used in a lithographic exposure tool to obtain in situ absorption parameters and reflectivity data. The absorption parameters and reflectivity data are used in a feedback control system that controls the exposure dose used in the lithographic tool.