Patent ID: 6563124
Filing Date: 2003-05-13
Classification: B82Y,H01J

Abstract:
An electron beam apparatus to register an electron beam pattern on a substrate, the apparatus comprising:a vacuum chamber having a wall; a substrate support in the vacuum chamber; electron beam source components to generate an array of electron beams in the vacuum chamber; electron beam modulator components to modulate the electron beams in the vacuum chamber; electron beam detector components to detect the electron beams in the vacuum chamber; one or more circuit boards passing through the wall of the vacuum chamber, each circuit board comprising (i) an internal portion to support one or more of the electron beam source, modulator or detector components, (ii) an external portion outside the vacuum chamber to support one or more external components, and (iii) a plurality of electrical traces that extend from the internal portion to the external portion to electrically connect the electron beam source, modulator or detector components to the external components; and one or more of the external components mounted on the external portions of the circuit boards.