Patent ID: 8563942

Claim:
A multi-beam deflector array means for use in a particle-beam exposure apparatus employing a beam of charged particles, said multi-beam deflector array means comprising a main body of overall plate-like shape having a membrane region and a buried CMOS-layer, said membrane region comprising: a first side facing towards the incoming beam of particles and a second side opposite to the first side; an array of apertures, each aperture allowing passage of a corresponding beam element formed out of said beam of particles; and an array of electrodes, each aperture being associated with at least one of said electrodes and the electrodes being controlled via said CMOS layer; wherein the electrodes are pillared, not located within depressions in the main body of the multi-beam deflector array means, the electrodes being connected to one of the first side and the second side of the main body of the multi-beam deflector array means by means of bonding connections; and wherein the electrodes with the bonding connections are produced by: depositing bonding material on the surface of the main body; connecting a wafer with the electrodes to the main body by a wafer bonding method; and removing a portion of said wafer with the electrodes from the main body of the multi-beam deflector array means.