Manufacturing method of semiconductor device and semiconductor device manufacturing apparatus
View Patent ↗To provide a manufacturing method of a semiconductor device for forming a diffusion layer by diffusing phosphorus atoms on a surface of a silicon substrate on which resist is applied, including the step of forming a diffusion layer, with a temperature of the silicon substrate maintained lower than a deterioration temperature of the resist.
1. A manufacturing method of a semiconductor device for forming a diffusion layer by diffusing phosphorus atoms on a surface of a silicon substrate on which resist is applied, including:
a diffusion layer forming step of forming said diffusion layer, with a temperature of said silicon substrate having said resist maintained lower than a deterioration temperature of said resist, and
an oxide film forming step of forming an oxide film by supplying plasma excitation gas to the surface of said formed diffusion layer with a temperature of said silicon substrate having said resist maintained lower than said deterioration temperature of said resist.
2. The manufacturing method of the semiconductor device according to claim 1 , wherein in said diffusion layer forming step, said diffusion layer is formed by supplying plasma-excited phosphorus atom content gas to the surface of the silicon substrate, with the temperature of said silicon substrate having said resist maintained lower than said deterioration temperature of said resist.
3. The manufacturing method of the semiconductor device according to claim 1 , wherein the temperature of said silicon substrate having said resist in said diffusion layer forming step is maintained to 90° C. or less.
4. The manufacturing method of the semiconductor device according to claim 2 , wherein the temperature of said silicon substrate having said resist in said diffusion layer forming step is maintained to 90° C. or less.
5. The manufacturing method of the semiconductor device according to claim 2 , wherein the plasma excitation gas in said oxide film forming step is gas obtained by plasma-exciting oxygen gas, gas obtained by plasma-exciting inert gas, or gas obtained by plasma-exciting mixed gas of the oxygen gas and the inert gas.
6. The manufacturing method of the semiconductor device according to claim 2 , wherein a thickness of the oxide film formed by said oxide film forming step is 17 Å or more.
7. The manufacturing method of the semiconductor device according to claim 2 , wherein said diffusion layer forming step and said oxide film forming step are performed continuously in the same processing chamber.