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:
Jun. 29, 1999
Filed:
Sep. 17, 1997
Applicant:
Inventors:
Joo-Hyeon Park, Taejeon, KR;
Seong-Ju Kim, Taejeon, KR;
Ji-Hong Kim, Taejeon, KR;
Sun-Yi Park, Taejeon, KR;
Assignee:
Korea Kumho Petrochemical Co., Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528104 ; 528100 ; 528 86 ; 528403 ; 528425 ; 5253333 ; 549357 ; 549430 ;
Abstract
There are disclosed an aromatic hydroxy compound or polymer substituted with acetal of Formula (I), (II) or (III), and a negative photoresist composition prepared therefrom. The pattern formed of the negative photoresist composition has good cross sections in addition to being superior in transmissivity to deep uv light and excimer laser and in thermal resistance and storage stability after exposure. ##STR1##