Patent ID: 6610459
Filing Date: 2003-08-26
Classification: B32B,G03F,H05K,Y10S,Y10T

Abstract:
A method of vacuum laminating a dry film photoresist-forming layer onto a prelaminated printed circuit board or other substrate (200) which prevents premature tacking of the dry film to the board or substrate, comprising:(a) placing the board or substrate in a first vacuum lamination chamber of a vacuum laminator (12) having two independent vacuum lamination chambers (18,20); (b) drawing a vacuum in said first chamber (18) at ambient temperature for a time sufficient to evacuate substantially all of the air from between the dry film and the surface of the board or substrate and place the dry film in intimate contact with the surface of the board substrate; (c) placing the board or substrate in a second vacuum lamination chamber (20) of the vacuum laminator, said second chamber being independent of said first chamber; and, (d) applying sufficient heat to the dry film on the board or substrate in said second chamber (20) to cause the dry film to adequately flow, the sufficient heat is at a temperature range of from 30Â° C. to 150Â° C., and then sufficient mechanical pressure on the board or substrate to thereby force the heated laminate to conform closely to the surface contours of the board or substrate.