Patent ID: 8745862

Claim:
A method for drilling reference bores into printed circuit boards, particularly by using a machine tool, the method comprising the steps of: a) applying a printed circuit board that is to be processed at a defined position on a supporting layer that is detachably fixated in a recess of a workpiece carrier, b) applying and/or pressing on a covering layer on at least one section of the printed circuit board, c) capturing the position of the printed circuit board, d) processing the printed circuit board by drilling at least one reference bore in the printed circuit board, e) detaching the covering layer from the printed circuit board and f) removing the processed printed circuit board, g) repeating steps a) to e) without exchanging the supporting layer and the covering layer, whereby the supporting layer, the printed circuit board that is to be processed and the covering layer are aligned relative to each other prior to step d) by a shift function such a way that in the sequential processing of several printed circuit boards, the bore holes that are created in the supporting layer and in the covering layer are positioned with respect to each other by a defined offset.