Patent ID: 7259777
Filing Date: 2007-08-21
Classification: G03F,H04N,H05K

Abstract:
1. Apparatus for holding flat plates of varying sizes, comprising: a base section having a flat surface and including plurality of interconnected channels formed on the surface thereof; at least one port connecting to said channels; a vacuum source connected to the at least one port; and an intermediate plate defining a flat surface and covering substantially all of said channels, said intermediate plate having a multiplicity of holes formed therethrough and being held down to said base section by said vacuum, said holes being arranged to be covered by a flat plate that is to be held to said flat surface of the intermediate plate and to act as a distributor of a vacuum formed in the interconnected channels to hold the flat plate to the flat surface of the intermediate plate; wherein at least a portion of the base section comprise an array of truncated pyramids, flat tops of said pyramids comprising the flat surface of the base section and areas between the pyramids comprising the channels of the base section.