PLASMA SHIELD FOR ELECTRODE
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United States of America Patent
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N/A
Issued Date -
Jan 19, 2012
app pub date -
Jul 13, 2011
filing date -
Jul 13, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Provided is a plasma shield for an electrode capable of preventing generation of particles by providing plasma shields at inner and outer diameter sides of an adhesive formed of elastomer for attaching a gas injection plate to an injection plate support member to protect the adhesive.The electrode includes a gas injection plate having a porous plate structure in which a plurality of gas injection holes are formed, an injection plate support member configured to maintain the gas injection plate attached to one side of a plasma chamber, and an adhesive formed of elastomer and attaching the injection plate support member to an upper surface of the gas injection plate. The improvement includes plasma shields having an annular shape corresponding to inner and outer diameters of the adhesive formed of the elastomer, installed adjacent to inner and outer diameter surfaces of the adhesive formed of the elastomer, and sealing the adhesive formed of the elastomer and disposed between the gas injection plate and the injection plate support member to prevent contact with particles generated while a plasma chamber is operated.
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