Stiffener sheet and flexible printed circuit board using the...

Details Stiffener sheet and flexible printed circuit board using the... Stiffener sheet and flexible printed circuit board using the...

2011-07-26

2011-07-26

Nakarani, D. S (Department: 1787)

Stock material or miscellaneous articles

Composite

Of polyimide

C428S209000, C428S901000

Reexamination Certificate

active

07985482

ABSTRACT:
A stiffener sheet for flexible printed flexible printed circuit boards, includes alternately laminated polyimide layers and polyamideimide layers, wherein a molecular structure of the polyamideimide is represented by the following formula:wherein Ar and Ar′ represents different substituted aromatic groups.

REFERENCES:
patent: 4051284 (1977-09-01), Ohkubo et al.

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