Method for preparing substrate for flexible print wiring...

Details Method for preparing substrate for flexible print wiring... Method for preparing substrate for flexible print wiring...

2005-11-08

2005-11-08

Talbot, Brian K. (Department: 1762)

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

C427S384000, C427S402000

Reexamination Certificate

active

06962726

ABSTRACT:
A method for preparing a substrate for a flexible print wiring board having a polyimide based resin layer wherein a solution of a polyimide based resin precursor is directly applied on an electrically conducting material to form a polyimide based resin precursor layer and then the precursor layer is cured by heating to prepare a polyimide based resin layer, characterized in that a solution of a polyimide based resin precursor B, which is one of solutions of two types of polyimide based resin precursors, is directly applied on an electrically conducting material and then, on the resultant layer is applied a solution of a polyimide based resin precursor A which allows resolving the residual strain generated in the polyimide based resin formed by the curing of the above polyimide based resin precursor B.

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