System for repairing electrical short circuits between parallel

Details System for repairing electrical short circuits between parallel System for repairing electrical short circuits between parallel

1984-07-26

1985-10-01

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

134 21, 134 2218, 134 24, 134 41, 134166R, 134198, 134102, 156640, 156644, 156646, 156652, 156345, 156656, 156902, C23F 102, B44C 122, C03C 1500, C03C 2506

Patent

active

045444390

ABSTRACT:
A system for cleaning a thru hole on a substantially planar electrical board. The electrical board has two major surfaces, upper and lower. A first gas and liquid transmission device is connected to the board to introduce etching gas and liquid into the thru hole. The device is adapted to surround the thru hole and seal the periphery thereof on one surface of the board. A second gas and liquid transmission device is connected to the board to remove the etching gas and liquid from the thru hole. This second device is adapted to surround the thru hole and seal the periphery thereof on the other surface of the board. A vacuum system is used to force gas and liquid to move through the thru hole from the first transmission device to the second transmission device, thereby etching and/or cleaning material from the thru hole.
In another embodiment of the present invention there are provided transmission devices that are adapted to surround a plurality of thru holes and seal the peripheries thereof on both surfaces of the board.

REFERENCES:
patent: 3861981 (1975-01-01), Loo
patent: 4344809 (1982-08-01), Wensink
patent: 4359360 (1982-11-01), Harris et al.

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