Accurate drilling of probe holes in the insulating plate of an e

Details Accurate drilling of probe holes in the insulating plate of an e Accurate drilling of probe holes in the insulating plate of an e

1996-11-06

1998-04-07

Young, Christopher G.

Radiation imagery chemistry: process, composition, or product th

Registration or layout process other than color proofing

430320, 430325, 430329, 324758, 324761, G06F 900, G01R 1512

Patent

active

057362793

ABSTRACT:
A method for manufacturing insulating plates with accurately located holes in patterns suitable for bed of nails type test heads. An optically aligned drilling machine is used to form holes in the insulating plate conforming to the test pattern by using a reference pattern photolithographically formed onto the insulating plate. The photolithographic formation provides a pattern of greater accuracy and maintains that accentuated degree of accuracy through camera alignment and fixed offset between commonly mounted camera and drill. The tighter registration of copper features in advanced printed circuit boards subject to testing with the bed of nails test heads require insulating plates hole patterns with the accentuated accuracy provided by the method.

REFERENCES:
patent: 3266343 (1966-08-01), Jellig
patent: 3532893 (1970-10-01), Marantette et al.
patent: 3574933 (1971-04-01), Cassingham
patent: 4183609 (1980-01-01), Luna
patent: 4443756 (1984-04-01), Lightbody et al.
patent: 4897598 (1990-01-01), Doemens
patent: 5511304 (1996-04-01), Aksu

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