Method and apparatus for aligning phototools for photoprocessing of printed circuit boards
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 9, 1994
Issued Date -
N/A
app pub date -
Jun 1, 1993
filing date -
Aug 29, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Phototools are located for processing both sides of printed circuit board panels by an apparatus and process that utilizes a work station with two alignment fixtures each including panel center registration PCR alignment mechanism to locate phototools and panels. Processing steps utilize the alignment fixtures to locate phototools on both sides of a panel. Each of the two phototools is initially positioned on its alignment fixture by the PCR alignment mechanism and secured to its alignment fixture by means of a vacuum supplied by a vacuum chuck which is operative as the top surface of the alignment fixture. The panel is then placed on top of the first phototool and aligned to the first phototool in the first alignment fixture using the PCR alignment mechanism. This first phototool is then affixed to the first side of the panel. The panel with the attached first phototool is then placed on the second phototool in the second alignment fixture and aligned to the second phototool using the PCR alignment mechanism. The second phototool is then affixed to the second side of the panel. The phototool-panel-phototool package is then placed in a printer for exposure.
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