Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Patent
1998-09-02
2000-11-21
Gulakowski, Randy
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
134169R, 134171, B08B 302, B08B 900
Patent
active
061488321
ABSTRACT:
An apparatus for in-situ cleaning of polysilicon-coated quartz furnaces are presented. Traditionally, disassembling and reassembling the furnace is required to clean the quartz. This procedure requires approximately four days of down time which can be very costly for a company. In addition, cleaning the quartz requires large baths filled with a cleaning agent. These baths occupy a large amount of laboratory space and require a large amount of the cleaning agent. Cleaning the furnace in-situ eliminates the very time consuming procedure of assembling and disassembling the furnace and at the same time requires less laboratory space and less amount of cleaning agent. The polysilicon remover may be either a mixture of hydrofluoric and nitric acid or TMAH. TMAH is preferred because it less hazardous than hydrofluoric acid and compatible with more materials. The cleaning agent may be introduced into the furnace either from the built-in injectors or from additionally installed injectors. If the built-in injectors are used, the input system of the furnace is cleaned in addition to the quartz inner lining.
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Gardner Mark I.
Gilmer Mark C.
Paiz Robert
Advanced Micro Devices , Inc.
Chaudhry Saeed T.
Daffer Kevin L.
Gulakowski Randy
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