POLYIMIDE FILM ROLL AND ITS MANUFACTURING METHOD,申请号JP20020374183-传众专利搜索

POLYIMIDE FILM ROLL AND ITS MANUFACTURING METHOD

申请公布号：JP2004203545(A)

申请号：JP20020374183

申请日期：2002.12.25

申请公布日期：2004.07.22

申请人：

DU PONT TORAY CO LTD

发明人：OKABASHI MASAKAZU;KOMINE YASUYOSHI

分类号：B65H18/06;B65H75/10;(IPC1-7):B65H75/10

主分类号：B65H18/06

摘要：PROBLEM TO BE SOLVED: To provide a polyimide film roll improved in the flatness likely to deteriorate due to wrinkles generating with the time owing to a humidity change and ensuring an improved yield by decreasing greatly the generation of bonding agent repulsion to cause the flatness to deteriorate when it is used in a flexible printed circuit. SOLUTION: The polyimide film roll is formed by winding a polyimide film on a takeup core, wherein the water absorption of the takeup core at 60% RH is equal to or less than 9% and the outer shape change due to humidity of the core is equal to or less than 0.3%. COPYRIGHT: (C)2004,JPO&NCIPI