Patent ID: 6113835
Filing Date: 2000-09-05
Classification: B23K,B29C,H05K

Abstract:
A method of processing a resin sheet with a laser beam, the method comprising:printing thermosetting resin ink on a first surface of a thermoplastic resin sheet to cover an area where a ditch is to be formed on the thermoplastic resin sheet;hardening the printed thermosetting resin ink to form a heat-resistant layer;radiating and scanning a laser beam on a second surface of the thermoplastic resin sheet along a line of the ditch to be formed, the second surface being opposite to the first surface on which the heat-resistant layer is formed; andmelting and evaporating a part of resin of the thermoplastic resin sheet with the laser beam to form the ditch, the ditch having a bottom which is closed by the heat-resistant layer.