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:
Jul. 12, 2022
Filed:
Aug. 07, 2017
Ridgefield Acquisition, Luxembourg, LU;
Medhat A. Toukhy, Flemington, NJ (US);
Weihong Liu, Branchburg, NJ (US);
PingHung Lu, Bridgewater, NJ (US);
Merck Patent GmbH, Darmstadt, DE;
Abstract
Environmentally stable, chemically amplified (CA) positive resist compositions are described. These resist compositions are based on a blend of at least two types of polymer platforms. The first platform is a low activation energy, acetal blocked polyhydroxystyrene (PHS) based resin; the second platform is an acrylate based resin containing a high activation energy acid labile group [such as tertiary-butyl acrylate(t-BA)]. The resist composition also contains a photo-acid generator (PAG), a base quencher, a surfactant dissolved in a suitable solvent. Also described, is the use of these resist composition in a method for forming a photoresist relief image on a substrate.