Patent ID: 6639245
Filing Date: 2003-10-28
Classification: G02F,H01L

Abstract:
A semiconductor device including a display unit having pixel electrodes arranged in a matrix and transistors for a pixel connected to the pixel electrodes and a peripheral drive circuit having a transistor for a peripheral drive circuit provided outside the display unit, whereinthe transistor for a peripheral drive circuit has a first crystalline silicon film, which is to be a crystal grown active region formed by introducing a catalyst metal into an amorphous silicon film and heating the film; the transistor for a pixel has a second crystalline silicon film, which is to be an active region, formed by crystallizing the amorphous silicon film without introducing the catalyst metal; the concentration of the catalyst metal in the first crystalline silicon film is in the range of 1Ã—1013 atoms/cm3 or higher and lower than 1Ã—1015 atoms/cm3; and the concentration of the catalyst metal in the second crystalline silicon film is lower than the concentration of the catalyst metal in the first crystalline silicon film.