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:
Feb. 10, 2015
Filed:
Jan. 15, 2013
Lg Chem, Ltd., Seoul, KR;
Han Soo Kim, Daejeon, KR;
Sung Hyun Kim, Daejeon, KR;
Kwang Han Park, Daejeon, KR;
Min Young Lim, Seongnam-si, KR;
Yoon Hee Heo, Daejeon, KR;
Ji Heum Yoo, Daejeon, KR;
Sun Hwa Kim, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
An alkali-soluble resin is provided. The alkali-soluble resin is prepared using a polyfunctional thiol compound as a chain transfer agent. The alkali-soluble resin has a lower viscosity than a resin having the same molecular weight. Further provided is a negative-type photosensitive resin composition comprising the alkali-soluble resin as a binder resin. The use of the alkali-soluble resin lowers the overall viscosity of the photosensitive resin composition to effectively reduce the height of a stepped portion of a photoresist pattern using a small amount of the photosensitive resin composition.