Patent ID: 7247367
Filing Date: 2007-07-24
Classification: B29C,B29K,C08G,C09D,Y10T

Abstract:
1. A polyimide film, which uses a soluble polyimide resin obtained by diamine constituent and acid dianhydride constituent, wherein the diamine constituent is a compound denoted by a following chemical formula (1), wherein the acid dianhydride constituent is denoted by a following chemical formula (2), A. A SINGLE BOND OR A BIVALENT HYDROCARBON GROUP HAVING 1 TO 3 CARBON ATOMS  OR A SINGLE BOND  A SINGLE BOND OR A BIVALENT HYDROCARBON GROUP HAVING 1 TO 10 CARBON ATOMS THE Zs ARE INDEPENDENT IN THE FORMULA.  OR DENOTES A SINGLE BOND, Y DENOTES,  OR DENOTES A SINGLE BOND (n IS IN A RANGE FROM 1 TO 10) wherein the polyimide film has a transparency of not less than 70% with respect to light with a wavelength of 440 nm and has a tearing strength of not less than 2N/mm when it is 75 μm thick.