Abstract: A device for marking copper-clad laminates comprises a laser (10), in whose resonator (12) there is an intensity-controlling screen (24), an expanding lens (26) for expanding the laser beam (18) and a focusing lens (30) for focusing the expanded laser beam (28) on the surface of a workpiece (32) in the form of a copper-clad laminate. In the corresponding method for marking copper-clad laminates a laser beam (18) is expanded, and the expanded laser beam (28) is focused on the surface of a workpiece (32) in the form of a copper-clad laminate, with the laser intensity inside laser resonator (12) being controlled by a screen (24).
Abstract: There are described a self-adhesive prepreg on the basis of a resin-impregnated fibrous supporting material carrying on at least one surface a layer with an increased ratio of resin to supporting material, and the use thereof for the production of sandwich structures.
Type:
Grant
Filed:
March 27, 1997
Date of Patent:
October 26, 1999
Assignee:
Isola AG
Inventors:
Hans-Joachim Gabrisch, Marteen De Zwart, Markus Rudin