Patent ID: 6917144
Filing Date: 2005-07-12
Classification: H01J

Abstract:
1. A microchannel plate for receiving photoelectrons comprising: a plate-like substrate web formed from a plurality of microtubules of a single type of acid soluble cladding glass and defining a pair of opposite faces; the substrate web including a plurality of microchannel passages extending between the opposite faces and having openings in both of the opposite faces; the microchannel openings having a funnel-like opening formed in the substrate web at least one of the opposite faces; and the microchannel plate is formed from a microchannel plate preform including a core glass different from the cladding glass; the microchannel plate preform is first etched for a desired period of time with a first acid selected to create the funnel-like openings at the intersection of the core and cladding glass at least one of the opposite faces; the microchannel preform having been first etched is then subjected to a second etching process with a second selected acid to remove the remaining core glass forming the plate-like substrate web.