Method of laser drilling fluoropolymer materials

Details Method of laser drilling fluoropolymer materials Method of laser drilling fluoropolymer materials

1988-08-12

1990-04-10

Silverman, Stanley

Coating processes

Electrical product produced

Welding electrode

156643, 156902, 2191217, 21912171, B05D 306

Patent

active

049159810

ABSTRACT:
A method of ablating fluoropolymer composite materials is presented wherein it has been found that small holes (less than 100 .mu.m) can be formed in fluoropolymer composite laminate materials using UV lasers. The resulting holes can be used to produce vias and plated through-holes having smooth side walls with little or no debris or residue remaining in the holes and minimal damage to the polymer. Thus, the vias and plated through-holes can be plated without further cleaning processes. In addition, the holes are formed at a relatively fast rate.

REFERENCES:
patent: 4473737 (1984-09-01), Anthony
patent: 4508749 (1985-04-01), Brannon et al.
patent: 4598039 (1986-07-01), Fischer et al.
patent: 4642160 (1987-02-01), Burgess
H. R. Philip et al.; Optical Absorption of Some Polymers in the Region 240-170 NM; Appln. Phys. Lett., 48(2), Jan. 13, 1986.
S. G. Hansen et al.; Formation of Polymer Films by Pulsed Laser Evaporation; Appl. Phys. Lett., 52(1), Jan. 4, 1988.

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