Optimized temperature controller for cold mass introduction

Semiconductor device manufacturing: process – With measuring or testing – Electrical characteristic sensed

Reexamination Certificate

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C219S497000, C219S483000

Reexamination Certificate

active

07087443

ABSTRACT:
A system for minimizing thermal reactor temperature overshoot and stabilization during a boat push. In one embodiment, the setpoint temperatures are reduced to a minimum value. As the temperature in the thermal reactor begins to increase, the setpoint temperatures are ramped back to the original setpoint temperature.

REFERENCES:
patent: 5895596 (1999-04-01), Stoddard et al.
patent: 6207937 (2001-03-01), Stoddard et al.
patent: 6211495 (2001-04-01), Stoddard et al.
patent: 6441350 (2002-08-01), Stoddard et al.
1) Numerical Heat Transfer Simulations of A Vertical Batch Furnance Under Closed-Loop Temperature Control; Semitool, Inc.; Apr. 5, 1997; pp. 110-117.
2) Improving Furnaces With Model-Based Temperature Control; Solid State Technology; Nov. 1996; pp. 119, 120, 122, 126, 128 and 131.

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