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:
May. 05, 1987
Filed:
Jul. 02, 1986
Applicant:
Inventors:
James E Guillet, Dons Mills, CA;
Anthony E Redpath, Toronto, CA;
Assignee:
Ecoplastics Limited, Toronto, CA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C07C / ;
U.S. Cl.
CPC ...
526284 ; 560220 ; 560221 ;
Abstract
Polymers of fluorene containing compounds which form crosslinked networks are found to provide useful negative photoresists which are sensitive in the ultraviolet wavelength range of between about 200 nm to 300 nm. When used in negative photoresist compositions, these fluorene compounds produce a high resolution and thus higher information density in microcircuits manufactured using these photoresists.