Patent ID: 7544954
Filing Date: 2009-06-09
Classification: H01J

Abstract:
1. A device for operating gas in the vacuum or low-pressure environment and for observation of the operation, wherein the vacuum or low-pressure environment is a specimen chamber formed inside an electron microscope and located between two pole pieces of the electron microscope, and an electron beam of the electron microscope passes through an imaginary axis having a focus range, said device comprising: a housing having at least one buffer chamber formed therein and at least one outer aperture formed at at least one of a top side thereof and a bottom side thereof; and at least one spacer enclosing a gas chamber and having two inner apertures formed thereon and corresponding to a top side and a bottom side of said gas chamber; wherein said housing and said spacer are connectable with each other to enable said inner and outer apertures to be coaxially aligned with each other and to enable said buffer chamber to cover at least one of said inner apertures, the inner or outer aperture located opposite to the other aperture covered by said buffer chamber is applied with a pressure regulation, said inner and outer apertures cover the axis that the electron beam passes, said housing further has a pumping port in communication with said buffer chamber, said spacer has a gas inlet in communication with said gas chamber, and said gas chamber overlaps said focus range.