Patent ID: 9453683
Filing Date: 2016-09-27
CPC Classification: C23C,F27B,F27D,H01L

Claim Text:
1. A heat treatment system which forms an impurity-doped polysilicon film on an object, the heat treatment system comprising: a heating unit which is configured to heat inside of a processing chamber accommodating a plurality of objects; a plurality of gas supply units which is configured to supply a film-forming gas for forming a polysilicon film and a doping gas into the processing chamber; a heat treatment condition storage unit which is configured to store heat treatment conditions, the heat treatment conditions including a temperature in the processing chamber heated by the heating unit and a flow rate of a film-forming gas and a doping gas supplied by the gas supply unit; a model storage unit which is configured to store a model indicating relationships between changes in a temperature in the process chamber and a flow rate of the doping gas, and a change in a film thickness of the impurity-doped polysilicon film and an impurity concentration in the impurity-doped polysilicon film; a heat treatment unit which is configured to control the heating unit to form impurity-doped polysilicon film on the objects according to the heat treatment conditions stored in the heat treatment condition storage unit; a calculating unit which is configured to determine whether the film thickness of the impurity-doped polysilicon film formed by the control of the heat treatment unit and the impurity concentration in the impurity-doped polysilicon film satisfy within a predetermined range, and when it is determined that the predetermined range is not satisfied, calculate a temperature in the processing chamber and a flow rate of the doping gas, which satisfy the predetermined range, based on the film thickness of the impurity-doped polysilicon film, the impurity concentration in the impurity-doped polysilicon film, and the model stored in the model storage unit; and an adjusting unit which is configured to adjust heat treatment to satisfy the predetermined range of the impurity-doped polysilicon film and the impurity concentration in the impurity-doped polysilicon film by changing the temperature in the processing chamber and the flow rate of the doping gas, which are stored in the heat treatment condition storage unit, respectively to the temperature in the processing chamber and the flow rate of the doping gas, which are calculated by the calculating unit, and heat-treating the objects according to the changed heat treatment conditions.