Fluid sprinkling – spraying – and diffusing – Combining of separately supplied fluids – At or beyond outlet
Patent
1998-06-15
2000-07-18
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Combining of separately supplied fluids
At or beyond outlet
239424, F23D 1116, B05B 706
Patent
active
060894725
ABSTRACT:
This invention relates to showerheads for delivering gases to reactor chambers. The showerhead 18 comprises a casing 19, which includes a backing plate 20, first and second baffle plates 21, 22 and an outlet plate 23. Baffle plates 21 and 22 divide the volume defined by the casing 19 into plena 24, 25 and 26. A gas supply 27 feeds the plenum 24, a gas supply 28 feeds the plenum 25 and a further gas supply 29 feeds the plenum 26. The outlet plate 23 has an array of openings 30 and each of the baffle plates 21, 22 has a tube for each opening 31. The tubes and outlets together define concentric but separate outlets for the respective plena.
REFERENCES:
patent: 4284242 (1981-08-01), Randell
patent: 5427317 (1995-06-01), Huttlin
patent: 5595606 (1997-01-01), Fujikawa et al.
patent: 5810252 (1998-09-01), Pennamen et al.
Hwu Davis
Kashnikow Andres
Trikon Equipments Limited
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