PCB tooling apparatus for forming patterns on both sides of a su

Details PCB tooling apparatus for forming patterns on both sides of a su PCB tooling apparatus for forming patterns on both sides of a su

1994-11-18

1996-08-20

Gray, David M.

Photocopying

Projection printing and copying cameras

Step and repeat

430 5, 428901, 355 73, 355 74, 355 76, G01B 1100

Patent

active

055483720

ABSTRACT:
The present invention includes a tooling apparatus designed to provide accurately aligned printed circuits on both major sides of a printed circuit board layer, especially advantageous for use in multi-layer PCB's. Also disclosed is the method manufacture of the apparatus and the methods of using the apparatus. The apparatus includes patterns formed on glass masks attached to frames incorporating alignment pins and slots. The patterns include registration marks for alignment during manufacture of the apparatus. During use, the apparatus allows accurate alignment of patterns on both sides of a PCB layer. Also disclosed is the apparatus with buttons used to pattern PCB layers having pre-drilled Z-axis holes.

REFERENCES:
patent: 5270571 (1993-12-01), Parks et al.
patent: 5337151 (1994-08-01), Baxter et al.

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