Method and manufacture for electrically insulating base material

Details Method and manufacture for electrically insulating base material Method and manufacture for electrically insulating base material

1986-05-15

1988-11-08

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041802, 156901, 156902, 428901, 427 97, B05D 512, B05D 136, B25D 1304

Patent

active

047832479

ABSTRACT:
Method and manufacture for electrically insulating base material used for perforated plated-through printed circiut panels with a metal core. The method includes applying a radiation-curable layer of insulating material to the preperforated metal core by an electrostatic spray method and precuring by irradiation or heat, coating with a further thin, thermally curable layer of insulating material by electrophoresis, drying the layer by heating and likewise partially curing it so that it is no longer capable of flowing, but yet is still reactive, optionally applying further curable insulating layers, and finally, fully thermally curing the entire coating of insulating material. The coatings obtained are impervious and are of uniform thickness even at the hole walls.

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