Patent ID: 6783688
Filing Date: 2004-08-31
Classification: H05K

Abstract:
A method for patterning printed circuit boards having coarse conductor structures and having at least one region with fine conductor structures, comprising:applying a metal layer to an electrically insulating substrate; applying an etch resist layer to the metal layer; exposing contours of envisaged coarse conductor structures, by partially eroding the etch resist layer with a first laser beam with a predefined first wavelength and a first processing field size; exposing contours of the fine conductor structures, by partially eroding the etch resist layer with a second laser beam with a predefined second wavelength and a second processing field size, at least one of the second wavelength being relatively shorter than the first wavelength and the second field size being relatively smaller than the first field size; producing the coarse and the fine conductor structures simultaneously by etching the exposed metal regions; and exposing the surfaces of the conductor structures by eroding the remainder of the etch resist layer.