Rule-based inspection of printed green ceramic tape

D. R. Patek, J. S. Goddard, T. Karnowski, D. Lamond, T. A. Hawkins

Research output: Contribution to journalConference articlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)88-99
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3306
DOIs
StatePublished - 1998
EventMachine Vision Applications in Industrial Inspection VI - San Jose, CA, United States
Duration: Jan 24 2000Jan 26 2000

Keywords

  • Ceramic green tape
  • Defect inspection
  • Defect specification
  • Machine vision
  • Referential inspection

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