Method of making drill back-up material for small bore drilling

Details Method of making drill back-up material for small bore drilling Method of making drill back-up material for small bore drilling

1988-12-22

1990-09-04

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Differential fluid etching apparatus

With microwave gas energizing means

156151, 156330, 156631, 408 1R, 408704, B32B 3118

Patent

active

049542001

ABSTRACT:
Disclosed is an improved back-up sheet for backing a workpiece during a small bore drilling process. The sheet also possesses electrical properties making it an ideal candidate as a laminate (reinforcing layer or bonding sheet) in the construction of multi-layer printed wiring boards. The sheet or laminate comprises the cured residue of:

REFERENCES:
patent: 3475513 (1969-10-01), Benson
patent: 3700341 (1972-10-01), Block
patent: 4354895 (1982-10-01), Ellis
patent: 4496695 (1985-01-01), Sugio et al.
patent: 4555414 (1985-11-01), Hoover et al.
patent: 4567216 (1986-01-01), Qureshi et al.
patent: 4737208 (1988-04-01), Bloechle et al.

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