There is provided a method for precisely forming light emitting layers in a semiconductor device without a positional deviation and at a high throughput. A pixel portion is divided into a plurality of signal lines by banks, and a coating liquid (R), a coating liquid (G), and a coating liquid (B) are applied respectively in a stripe shape at the same time using a dispenser. Then, luminescent layers emitting lights of respective colors of red, green and blue can be formed by heating these coating liquids.