Measuring and testing – Fluid pressure gauge – Diaphragm
Reexamination Certificate
2005-01-04
2005-01-04
Oen, William (Department: 2855)
Measuring and testing
Fluid pressure gauge
Diaphragm
Reexamination Certificate
active
06837111
ABSTRACT:
A variable capacitance measuring device can comprise a glass-ceramic insulator having a coefficient of thermal expansion that closely matches the coefficient of thermal expansion of a metallic materials used within the device. The glass-ceramic material may chemically bond to the surfaces of the metallic materials to provide a hermetic seal and eliminate the need for a separate glass seal or grooves within the electrode assembly. Additionally, a single-piece electrode assembly can be used instead of a separate electrode assembly (for the electrical feedthrough) and electrode. A shim may be used during the formation of the insulating material to reduce the likelihood of the insulator adhering to surfaces of the electrode portion during the manufacturing process. Also, separate bake-out and getter activation cycles may be combined into a single heat cycle.
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Mykrolis Corporation
Oen William
Sprinkle IP Law Group
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