Patent ID: 8541689

Claim:
A method for removing a subportion or part of a substantially flat or planar material layer which is bonded with at least one further substantially flat or planar material layer in a bonding procedure, wherein, in the region or zone of the subsequent removal of the subportion, an area kept free from direct bonding between the material layers is provided by applying an adhesion-preventing material preventing the adhesion of the material layers to be bonded and wherein the substantially flat material layers to be bonded are formed by layers of a multilayer printed circuit board, wherein, the adhesion-preventing material has a softening or melting point of at least 100° C. resulting in hardening of any further layers of adhesive being use and resulting in a liquefaction of the adhesion-preventing material during a further increase of the temperature during a connecting or pressing process, and wherein the adhesion-preventing material is applied as a waxy paste as a dispersion in a solvent and the adhesion-preventing material comprises a separating component and a binder.