Patent ID: 7879693
Filing Date: 2011-02-01
Classification: F28D,F28F,H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising the steps of: forming a first semiconductor film over a substrate; introducing a crystallization promoting material to the first semiconductor film; applying a first heating gas having a first temperature to the first semiconductor film in a first room; crystallizing the first semiconductor film by applying a second heating gas having a second temperature to the first semiconductor film in a second room; applying a first cooling gas having room temperature to cool the crystalline semiconductor film after the crystallizing step; forming a second semiconductor film over the first semiconductor film; applying a third heating gas having a third temperature to the second semiconductor film in the first room; gettering the crystallization promoting material from the first semiconductor film to the second semiconductor film by applying a fourth heating gas having a fourth temperature to the second semiconductor film in the second room; applying a second cooling gas having room temperature to cool the crystalline semiconductor film and the second semiconductor film after the gettering step; removing the second semiconductor film, wherein the second temperature is higher than the first temperature, and the fourth temperature is higher than the third temperature.