Patent attributes
A semi-closed observational environment for an electron microscope includes a housing having at least two spacers for partitioning itself into a receiving chamber, a gas chamber below the receiving chamber, a buffer chamber below the gas chamber, at least one gas inlet formed at the gas chamber, and at least one pumping port formed at the buffer chamber. The receiving chamber has at least two view holes formed at top and bottom sides thereof respectively, wherein the latter communicates with the gas chamber. The gas chamber has at least one gas aperture formed at a bottom side thereof for communication with the buffer chamber. The buffer chamber has at least one outer aperture formed at a bottom side thereof for communication with outside. The two view holes of the receiving chamber are coaxially aligned with the gas and outer apertures. A film is mounted to and seals the upper view hole.
