Patent ID: 7468293

Claim:
A method for the production of window elements which can be soldered into a housing so as to be hermetically tight, said method comprising the steps of: providing an optically transparent, flat substrate material whose size is sufficient for a plurality of window elements, providing an optical coating on at least one surface of each window element; removing frame-like portions of optical coating from the coated surface of each window element, wherein the frame-like portions enclose optically active surfaces of the window elements; providing the coated and uncoated portions of the at least one surface with an adherence layer system, wherein the adherence layer system can be etched selectively with respect to the optical coating; covering the portion of the at least one surface that has optical coating with a lift-off coating the entire at least one surface with a soldering layer system; removing the lift-off mask and thereby leaving a metal coating on the portions of the at least one surface without optical coating, wherein the metal coating is used to produce the solder connection with the housing, and wherein the metal coating serves as a mask for etching the adherence layer system; and separating the window elements from to substrate material.