Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2005-03-22
2005-03-22
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
Reexamination Certificate
active
06870177
ABSTRACT:
An apparatus for accurately locating a micro-electronic chip in a chip-holding cavity for visual testing, the chip having at least a front wall and a pair of opposed, spaced-apart side walls, wherein the front wall meets with each of the side walls to form opposed, spaced-apart first and second front edges, comprising a cavity side wall formed to juxtapositionally abut at least one of the side walls of the chip, the cavity side wall having formed therein a depression creating a shadow projecting forward from the depression, wherein the first front edge of the chip forms a border of the shadow to form an objectively measurable contrast in grayness between the shadow and the chip.
REFERENCES:
patent: 4312117 (1982-01-01), Robillard et al.
patent: 4953283 (1990-09-01), Kawabata et al.
patent: 5088190 (1992-02-01), Malhi et al.
patent: 5123850 (1992-06-01), Elder et al.
patent: 5543725 (1996-08-01), Lim et al.
Burgoyne Robert S.
Fish Jeffrey L.
Hawkes Malcolm V.
Wright Jon Stuart
Electro Scientific Industries Inc.
Luu Thanh X.
Stoel Rives LLP
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