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A carbonless paper sheet is used to measure the pressure distribution produced by the lamination system of a multilayer ep glass printed circuit board.
English (United States)
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Pressure Distribution Measuring Technique for Lamination System
A carbonless paper sheet is used to measure the pressure distribution
produced by the lamination system of a multilayer ep glass printed circuit board.
In one application, the carbonless paper sheet is inserted between one of the
planishing plates of the laminator and an outer surface of the workpiece
juxtaposed to the planishing plate. The resulting surface impression on the
paper sheet is indicative of the pressure distribution over the surface area of the
workpiece and is appropriately correlated. The workpiece can be the laminates
to be laminated of an actual work product or that of a specimen of the work
product or that of a simulated or dummy specimen. As such, the technique
provides an evaluation of the workpiece or specimen directly.
In other applications, the technique is used to evaluate press pad materials,
as well as the planishing plates per se with or without the presence of the
workpiece in the system. The flatness and parallelism of the entire laminating
system can thus be obtained, which in turn, if desired, may also be used to
evaluate the workpiece indirectly.