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:
Sep. 16, 2003
Filed:
Sep. 12, 2001
Applicant:
Inventors:
Randal L. Campbell, New Alexandria, PA (US);
James E. Jones, Butler, PA (US);
Assignee:
PPG Industries Ohio, Inc., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F 7/20 ;
U.S. Cl.
CPC ...
G03F 7/20 ;
Abstract
Methods for treating a photoresist by exposure to light from an electrodeless UV bulb are disclosed. The methods are applicable to both positive and negative photoresists. In the case of positive photoresists, use of electrodeless UV lamps significantly reduces the UV exposure time. Methods for making circuit boards and apparatus for making circuit boards are also disclosed.