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Orthogonal Intersecting Light Beam Position Locater

IP.com Disclosure Number: IPCOM000060834D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Gobran, FS Grospin, FE Klodowski, MJ Koliander, GL [+details]

Abstract

In the manufacture of printed circuit boards (PCBs) various inspections are made to ascertain if defects in the circuitry exist. If defects are discovered, their location must be either marked or recorded so that the defect location can be easily found in a subsequent repair operation. A method of recording the X-Y coordinates of a defect without physically contacting or marking the PCB is accomplished in a system that locates the defect using an image processing system and enters the X-Y coordinates into adata base. At the repair test station the defect coordinates are recalled from the data base and converted to intersecting light beams to locate the defect. The PCB 1 to be repaired or tested is placed on an X-Y frame 2, as seen in the side view of the drawing.