Patent ID: 7280884

Claim:
An optimization method for deposition time in a thermal oxidization process comprising: a first step of inputting a target thickness value of a product model processed with thermal oxidization into a host computer; a second step of transmitting current atmospheric pressure data at a start of processing obtained from a barometer and comparative data into the host computer via a network, the comparative data including an oxidization time of an immediately preceding processed lot in the same oxidization process as the product model and an average thickness value; a third step of adding a first correction value obtained from a difference between the target thickness value and an actual thickness value during an oxidization processing period for the immediately preceding lot and a second correction value obtained from a difference between the current atmospheric pressure data and an atmospheric pressure correction value obtained from previous atmospheric pressure data, and the third step calculating a time for desired oxidization processing based on a result of the adding; and a fourth step of transmitting the calculated time for the desired oxidization processing to an apparatus for performing a thermal oxidization process via the network, wherein, in the third step: the first correction value is calculated based on a value that is obtained from subtracting the average thickness value of an immediately preceding processed lot from a target thickness value of the same oxidization processing job; and the second correction value is calculated based on an atmospheric pressure at the time of processing an immediately preceding lot and a current atmospheric pressure.