Electronic circuit assembly having high contrast fiducial

Details Electronic circuit assembly having high contrast fiducial Electronic circuit assembly having high contrast fiducial

2005-02-15

2005-02-15

Flynn, Nathan J. (Department: 2826)

Active solid-state devices (e.g., transistors, solid-state diode

Test or calibration structure

C257S797000, C257S798000, C257S678000, C257S684000, C257S730000

Reexamination Certificate

active

06855953

ABSTRACT:
An electronic circuit assembly having a fiducial on a lower layer substrate. The fiducial is viewed through a through hole that is aligned with the fiducial and extends through an upper layer substrate that is adjacent the lower layer substrate. The fiducial and the through hole provide a high contrast between the fiducial and the surrounding substrate permitting viewing and recognition of substrate orientation by a computer vision system.

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patent: 04150002 (1992-05-01), None

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