Circuit board layers with identification images

Details Circuit board layers with identification images Circuit board layers with identification images

1997-07-23

2000-09-05

Gaffin, Jeffrey

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

174250, 2940701, 294071, H05K 103

Patent

active

06114634&

ABSTRACT:
A circuit board (110) has a layer window (100) through which images (120-170) on transparent layers can be seen. An inspector of the board can determine if the layers have been placed properly if the images (120-170) are in a unidirectional step formation away from the outer layer. The visual inspection is further enhanced by forming the images with overlapping curvatures (180) at their ends.

REFERENCES:
patent: 3272909 (1966-09-01), Bruck et al.
patent: 5093183 (1992-03-01), Strunka
patent: 5266380 (1993-11-01), Renguso et al.

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