Patent ID: 6521543
Filing Date: 2003-02-18
Classification: G03F

Abstract:
A multiple exposure method for defining a rectangular pattern on a photoresist layer, comprising the following steps:defining a rectangular region having a first margin pair and a second margin pair longer than the first margin pair corresponding to the rectangular pattern on the photoresist layer; performing a first exposure process on a first exposure region of the photoresist layer, wherein an extension of the first margin pair acts as a boundary between the first exposure region and the rectangular region; performing a second exposure process and a third exposure process on a second exposure region and a third exposure region of the photoresist layer respectively, wherein an extension of the second margin pair acts as a boundary between the second exposure region and the rectangular region and a boundary between the third exposure region and the rectangular region; and performing a development process on the first exposure region, the second exposure region and the third exposure region to create the rectangular pattern on a substrate.