C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/40
C08G 8/08 (2006.01) C08G 8/04 (2006.01) G03F 7/00 (2006.01) G03F 7/012 (2006.01) G03F 7/023 (2006.01) G03F 7/26 (2006.01)
Patent
CA 1279430
HIGH-MOLECULAR-WEIGHT SOLUBLE NOVOLAK RESIN AND PROCESS FOR PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE Disclosed is a novel, organic solvent-soluble novolak resin having a high molecular weight and an inherent viscosity of at least 0.1. This high- molecular-weight novolak resin can be prepared with a good reproducibility by reacting an aldehyde with a polyfunctional phenol at an aldehyde/polyfunctional phenol molar ratio of from 0.85 to 1.20 in the presence of an acidic catalyst in a solution state. This high-molecular-weight novolak resin is valuable as the resin component of a radiation-sensitive resist.
524198
Mcfadden Fincham
Toray Industries Inc.
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