Patent ID: 8722506

Claim:
A method for the production of an alignment mark on a semiconductor wafer using a light-absorbing layer for a subsequent structuring or for the protection of at least one light sensitive area of a circuit element, comprising: etching at least one cavity in at least one layer on a substrate of a semiconductor wafer thereby forming a group of pillars in the at least one cavity; depositing the light-absorbing layer in the at least one cavity around the formed group of pillars; wherein the cavity is etched with a breadth so that it is no more than partially filled after the deposition of the light-absorbing layer; and wherein the formed group of pillars is shaped as pillar row having a height that is greater than a thickness of the deposited light-absorbing layer in the at least one cavity so that upper surfaces of the pillars of the formed group of pillars are not covered by the light-absorbing layer.