Patent ID: 7388211
Filing Date: 2008-06-17
Classification: H01J

Abstract:
1. A semi-closed environment for an electron microscope, comprising: a housing having at least two spacers for partitioning its internal space into a receiving chamber, a gas chamber located below said receiving chamber, and at least one buffer chamber located below said gas chamber, said receiving chamber having at least one view hole formed at a top side thereof and located at said housing, said receiving chamber further having at least one view hole formed at a bottom side thereof and located at one of said at least two spacers for communication with said gas chamber, said gas chamber having at least one gas aperture formed at a bottom side thereof and located at the other spacer for communication with said buffer chamber, said buffer chamber having at least one outer aperture formed at a bottom side thereof for communication with outside, said at least two view holes being coaxially aligned with said at least one gas aperture and said at least one outer aperture, said housing further having a film mounted to and sealing said view hole located at the top side of said receiving chamber, at least one gas inlet formed at a side of said gas chamber, and at least one pumping port formed at a side of said buffer chamber.