Patent ID: 8198601

Claim:
A method for producing a multi-beam deflector array device with a plurality of openings for use in a particle-beam exposure apparatus, in particular a projection lithography system, starting from a CMOS wafer, comprising a silicon wafer having, on a first side, a circuitry layer beneath a contact layer and a cover layer, the cover layer serving as a passivation layer, said method comprising the following steps, performed at at least one location on the wafer: a) Generating at least one pair of parallel trenches on the first side of the wafer blank at the edges of an area where the circuitry layer below is non-functional, the trenches reaching through the passivation layer and the circuitry layer into the layer of bulk material, the trenches being located at a predetermined distance from each other according to the dimensions of said area, b) passivating the sidewalls and bottom surfaces of the trenches, c) depositing a conducting filling material into the trenches, thus creating columns of filling material designed to serve as electrodes, d) attaching metallic contact means to the electrodes where they reach out of the trenches on the first side of the CMOS wafer, e) structuring of an opening located between the electrodes, said opening extending over the area mentioned in step a) so that the electrodes are arranged opposite of each other on the sidewalls of the opening.