Patent ID: 11937379
Assignee: AT&S AUSTRIA TECHNOLOGIE & SYSTEMTECHNIK AKTIENGESELLSCHAFT
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method of etching an electrically conductive layer structure during manufacturing a component carrier, the method comprising:
subjecting the electrically conductive layer structure to an etching composition comprising an etchant and a photosensitive compound to thereby form a recess in the electrically conductive layer structure; and
irradiating the recess at least for a part of time while the electrically conductive layer structure is subjected to the etching composition;
wherein the photosensitive compound has at least one functional group configured for inhibiting copper etching,
wherein the irradiating increases an affinity of the photosensitive compound for attaching to a copper surface.