Scanning electron microscope
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 27, 1994
Grant Date -
N/A
app pub date -
Apr 26, 1993
filing date -
Apr 26, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved scanning electron microscope is disclosed which includes a compact, replaceable electron beam emitter assembly and concentric liner tubes. The concentric liner tubes extend through a central portion of electromagnetic lenses for forming an evacuated path for the electron beam. An outer sealing jacket is provided for forming a vacuum seal with the column assembly sufficient to maintain a vacuum within the outer sealing jacket. A conductive inner liner tube positioned within the outer sealing jacket is adapted to have the electron beam pass therethrough. The inner liner tube provides supports for spray baffles and/or beam shaping orifices. The improved electron beam emitter assembly within the gun assembly includes a filament clamped between a front plate and a back plate by clamping screws. The clamping screws additionally hold an adjustable grid against the front plate.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully