Method for producing an electrical insulator
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United States of America Patent
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Dec 24, 2002
Issued Date -
N/A
app pub date -
Feb 7, 2001
filing date -
Aug 7, 1998
priority date (Note) -
Expired
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Abstract
An electrical insulator is produced by coating a molded part of the insulator with a hydrophobic plasma-polymer coating. The plasma-polymer coating is produced by igniting a plasma in a non-polar working gas or a working gas having non-polar groups at a working pressure of between 0.001 Pa (1.multidot.10.sup.-5 mbar) and 50 Pa (5.multidot.10.sup.-1 mbar). The electrical power input per chamber volume lies between 0.5 and 5 kW/m.sup.3, the gas flow per chamber volume lies between 10 and 1000 sccm/m.sup.3. A durable, hard and hydrophobic plasma-polymer coating is created, the quality of which is independent of the material of the molded part.
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