Coating apparatus – Gas or vapor deposition – Crucible or evaporator structure
Patent
1994-01-07
1994-11-08
Bueker, Richard
Coating apparatus
Gas or vapor deposition
Crucible or evaporator structure
134 56R, 134115R, C23C 1600
Patent
active
053623282
ABSTRACT:
A means and method for protecting a source reagent vaporizer structure from the harmful effects of solid build-up occurring during its use in chemical vapor deposition (CVD). Vaporizer structures may be used to provide a means of transferring relatively involatile source reagents or reagent solutions into CVD reactors and often are high surface area, highly efficient heat transfer structures. When vaporizers are used in CVD, often some premature decomposition of the source reagent occurs on the vaporizer element as well as some oxidative decomposition to produce solid products which cause clogging and inefficient vaporization. The invention provides both apparatus and method to periodically flush clean such vaporizer elements to increase their consistency, reliability, and average time between servicings.
REFERENCES:
patent: 5204314 (1993-04-01), Kirlin
Buskirk Peter Van
Gardiner Robin A.
Kirlin Peter S.
Advanced Technology & Materials Inc.
Bueker Richard
Hultquist Steven J.
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