Process tube with in-situ gas preheating

Details Process tube with in-situ gas preheating Process tube with in-situ gas preheating

1997-09-12

1999-09-07

Pelham, Joseph

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

118725, C23C 1600

Patent

active

059483008

ABSTRACT:
A semiconductor wafer furnace process tube includes one or more gas delivery lines which wind around the circumference of the process tube in a non-product region near one end to preheat the gas in the lines. The winding section begins within the non-product region of the heater and terminates prior to the location of the first wafer within the process tube. From the termination of the winding section, the delivery lines continue axially directly to the opposite end of the tube. The length of the lines within the winding section is preselected to adequately preheat the gas in the lines before the lines pass the wafers. In this manner, the gas is able to absorb energy from the non-product region of the furnace with minimal or no cooling of the wafers in the product region of the furnace. Additionally, the lines are routed to absorb energy equally around the circumference of the process tube and not create a cold side within the tube. Also, the straight runs past the wafers are equally spaced around the circumference of the tube. In this way, any remaining effect of the gas lines on the tube are balanced.

REFERENCES:
patent: 3811826 (1974-05-01), Enderlein
patent: 4347431 (1982-08-01), Pearce et al.
patent: 4369031 (1983-01-01), Goldman et al.
patent: 4597736 (1986-07-01), Moffat
patent: 4738618 (1988-04-01), Massey et al.
patent: 4911638 (1990-03-01), Bayne et al.
patent: 4937434 (1990-06-01), Nakao
patent: 4954685 (1990-09-01), Kumagai et al.
patent: 5001327 (1991-03-01), Hirasawa et al.
patent: 5076206 (1991-12-01), Bailey et al.
patent: 5116784 (1992-05-01), Ushikawa
patent: 5146869 (1992-09-01), Bohannon et al.
patent: 5178534 (1993-01-01), Bayne et al.
patent: 5225378 (1993-07-01), Ushikawa
patent: 5279670 (1994-01-01), Watanabe et al.
patent: 5320680 (1994-06-01), Learn et al.
patent: 5407181 (1995-04-01), Ohsawa
patent: 5443648 (1995-08-01), Ohkase
patent: 5445522 (1995-08-01), Miyagi et al.
patent: 5458685 (1995-10-01), Hasebe et al.
patent: 5464313 (1995-11-01), Ohsawa
patent: 5482558 (1996-01-01), Watanabe et al.
patent: 5520742 (1996-05-01), Ohkase
patent: 5540098 (1996-07-01), Ohsawa
patent: 5561088 (1996-10-01), Sameshima
patent: 5586880 (1996-12-01), Ohsawa

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