Method for stripping conformal coatings from circuit boards

Details Method for stripping conformal coatings from circuit boards Method for stripping conformal coatings from circuit boards

1994-10-18

1996-03-26

Osele, Mark A.

Adhesive bonding and miscellaneous chemical manufacture

Differential fluid etching apparatus

With microwave gas energizing means

134 12, 134 13, 134038, 2940206, 294264, B32B 3500

Patent

active

055017614

ABSTRACT:
In preparation for removing a protective adherent covercoat from a circuit board that is to be repaired, the surface integrity of the coating is altered (for example, by making incisions therein). Subsequently, the coated circuit board is subjected to supercritical carbon dioxide in a processing chamber. Following this process, the coating is easily lifted from the board.

REFERENCES:
patent: 5070603 (1991-12-01), Waldsmith
patent: 5088008 (1992-02-01), Takeyama et al.
patent: 5236602 (1993-08-01), Jackson
Moxley, Western Electric Technical Digest No. 36, Oct. 1974, pp. 27-28.
V. Krukonis, "Processing of Polymers With Supercritical Fluids" 1985, pp. 7-16, Polymer News, vol. 11.

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