Flexible base materials, their preparation and their use for pri

Details Flexible base materials, their preparation and their use for pri Flexible base materials, their preparation and their use for pri

1984-05-21

1985-03-05

Lesmes, George F.

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

428458, 4284735, 4284744, 427 96, 525432, H05K 100

Patent

active

045032858

ABSTRACT:
Flexible base materials consisting of a metal foil and a film, firmly adhering thereto without an interlayer, of a polyamide/polyimide block copolymer of the formula I, or of a polyamide/polyimide copolymer prepared from a polyamide acid block of the formula IVa or Va and a dicarboxylic acid dichloride of the formula XI and a diamine of the formula XII.
The individual symbols are defined in claim 1.
The base materials according to the invention are suitable for the preparation of flexible printed circuits.

REFERENCES:
patent: 3582458 (1971-06-01), Haller
patent: 3682960 (1972-08-01), Haller
patent: 3894114 (1975-07-01), Lohmann et al.
patent: 4124651 (1978-11-01), Lohmann et al.
patent: 4148969 (1979-04-01), Henderson
patent: 4553954 (1982-10-01), Yamaoka et al.
Chem. Abst. 87, 77490p (1977).
Chem. Abst. 86, 157218a (1977).
Chem. Abst. 77, 157944y (1972).

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