A SHADOW-CREATING APPARATUS - ELECTRO SCIENT IND INC

Title:

A SHADOW-CREATING APPARATUS

Document Type and Number:

WIPO Patent Application WO2003046510

Kind Code:

B1

Abstract:

An apparatus (12) for accurately locating a micro-electronic chip (9) in a chip-holding cavity (28) for visual testing, the chip (9) 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 about 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 (9) forms a border of the shadow to form an objectively measurable contrast in grayness between the shadow and the chip (9).

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Inventors:

HAWKES MALCOLM V
WRIGHT JON STUART
BURGOYNE ROBERT S
FISH JEFFREY L

Application Number:

PCT/US2002/036619

Publication Date:

April 29, 2004

Filing Date:

November 14, 2002

Export Citation:

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Assignee:

ELECTRO SCIENT IND INC (US)

International Classes:

G01N21/84; G01N21/01; G01N21/956; (IPC1-7): H01L21/603; G01R31/02; H05K1/00

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