Patent ID: 6140013
Filing Date: 2000-10-31
Classification: G03F,H05K

Abstract:
A photoresist layer supporting film (A) formed from a polymer composition comprising (i) 55 to 99% by weight of a copolyester containing ethylene terephthalate units as a main recurring unit and having a melting point of 210 to 250.degree. C. and (ii) 1 to 45% by weight of polybutylene terephthalate or a copolyester containing butylene terephthalate units as a main recurring unit and having a melting point of not lower than 180.degree. C., (B) having a plane orientation coefficient of 0.08 to 0.16 and (C) having L5 values in the longitudinal and transverse directions in the range of 1 to 45 g/mm.