Rule-based inspection of printed green ceramic tape

Conference · Thu Jan 01 04:00:00 EST 1998

OSTI ID:634077

Patek, D R; Goddard, J S; Karnowski, T ^[1]; Lamond, D; Hawkins, T A ^[2]

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1. Oak Ridge National Lab., TN (United States)
2. Coors Electronic Package Co., Chattanooga, TN (United States)

A template-based vision system for the 100% inspection of printed flaws on green ceramic tape has been developed. Design goals included a requirement for the detection of flaws as small as two thousandths of an inch on parts up to 8 by 8 inches in size. The inspection engine is a Datacube, Inc., MV200 pipeline processor. As each part is inspected, four 2K by 2K pixel quadrant images are stitched together to construct a single 4K by 4K pixel image with the aid of multiple fiducials located in each quadrant. The part fiducial locations, mask image, and punched-hole position data are generated, beforehand, from CAD designs using a defect map editor (DME), a preprocessing software package developed for the PC. The DME also generates a part ``defect map``. Each unique structure in the printed pattern is defined as an object. Objects are grouped into user-defined categories such as die pads, contact fingers, traces, and electrolysis buses. The map is used during the runtime inspection to associate each detected defect with an object group and a particular defect specification for that group. Repeat defects are optionally tracked for up to three consecutive parts.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 634077
• Report Number(s): ORNL/CP--96066; CONF-980117--; ON: DE98002728; CRN: C/Y-12--92-0078
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CAMERAS
COMPUTERS
DEFECTS
ELECTRONIC EQUIPMENT
IMAGE PROCESSING
INSPECTION
ON-LINE SYSTEMS
SCREEN PRINTING