Method of forming a seal between a housing and a diaphragm of a capacitance sensor
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United States of America Patent
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Jan 8, 2008
Grant Date -
Feb 1, 2007
app pub date -
Oct 5, 2006
filing date -
Oct 7, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The axial distance between opposing conductors of a capacitance pressure transducer can depend, in part, upon the thickness of a seal that is disposed between a housing and a diaphragm of the capacitance pressure transducer. The present invention utilizes spacer elements and sealing beads to form a seal that is disposed between the housing and the diaphragm of a capacitance pressure transducer. The sealing beads have a melting temperature that is lower than the melting temperature of the spacer elements. The sealing beads are melted so that they flow around and surround the unmelted spacer elements. Upon solidifying, the sealing beads and the spacer elements thus form the seal. The thickness of the seal can be established accurately and uniformly by controlling the height of the spacer elements. By utilizing a seal that has an accurate and uniform thickness, the opposing conductors of the capacitance pressure transducer can be accurately positioned and oriented in relationship to each other during the manufacturing process.
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