Patent ID: 8778779
Filing Date: 2014-07-15
Classification: G03F,H01L

Abstract:
1. A method for producing semiconductor device comprising: performing a first exposure of a photoresist film formed on a semiconductor wafer via an exposure mask; performing a second exposure of the photoresist film via the exposure mask; and performing a third exposure of the photoresist film via the exposure mask, wherein: a second shot region projected onto the photoresist film by the second exposure is adjacent in a first direction to a first shot region projected onto the photoresist film by the first exposure, and a third shot region projected onto the photoresist film by the third exposure is adjacent in the first direction to the second shot region; the exposure mask is such that a shot region projected on the semiconductor wafer by one exposure has a rectangular form; the shot region includes a peripheral scribe region disposed at peripheral portion of the shot region and a chip region disposed inside the peripheral scribe region; the peripheral scribe region has a first side and a second side opposite to each other and crossing the first direction, and a third side and a fourth side opposite to each other and parallel to the first direction; a first pattern is disposed on the first side, and a second pattern is disposed on the second side at a position opposite to the first pattern; the photoresist film is of positive type, and the first pattern is formed as a light shielding pattern while the second pattern is formed as a light transmitting region with a size to contain the first pattern, or the photoresist film is of negative type, and the first pattern is formed as a light transmitting pattern while the second pattern is formed as a light transmitting region with a size to contain the first pattern; the first exposure and the second exposure are performed in such a manner that the first shot region and the second shot region do not overlap each other and that the first pattern of either of the first shot region and the second shot region and the second pattern of the other of the first shot region and the second shot do not overlap each other; and the second exposure and the third exposure are performed in such a manner that the first pattern of either of the second shot region and the third shot region and the second pattern of the other of the second shot region and the third shot region overlap each other.