Printed circuit board hole cleaner

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof

Patent

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Details

51317, B24B 1922

Patent

active

042032571

ABSTRACT:
Multilaminate printed circuit boards have at least three conductor layers separated by two insulator layers. After drilling through the boards, cleaning of the drilled hole is accomplished by forcing a slurry of granular abrasive grit in a liquid carrier through the hole. Manifolds direct the slurry through the holes thereby cleaning them.

REFERENCES:
patent: 2419448 (1947-04-01), Gordon
patent: 3009468 (1961-11-01), Eberle
patent: 3039234 (1962-06-01), Balman
patent: 3521412 (1970-07-01), McCarty
patent: 3728821 (1973-04-01), Perry
patent: 3931828 (1976-01-01), Lawler

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