Patent ID: 9728473
Date: 2017-08-08
CPC Classifications: C23C,H01L

Claim:
1. A method of manufacturing a semiconductor device, comprising: forming a film along a surface of a semiconductor substrate in a first surface area state having a first surface area by supplying a reaction gas at a first flow rate; detecting a transition from the first surface area state to a second surface area state having a second surface area different from the first surface area; and forming the film by changing the flow rate of the reaction gas from the first flow rate to a second flow rate different from the first flow rate after detecting the transition from the first surface area state to the second surface area state, wherein forming the film at the first flow rate and forming the film at the second flow rate are performed in a film formation apparatus provided with a reaction chamber and an automatic pressure controller connected to the reaction chamber, and wherein detecting the transition from the first surface area state to the second surface area state is achieved by detecting a variation in a degree of openness of the automatic pressure controller.