Patent ID: 7871745
Filing Date: 2011-01-18
Classification: G03F

Abstract:
1. An exposure method for manufacturing a device to improve an overlay alignment of successive layers in the device, the exposure method comprising: providing a wafer, wherein the wafer is covered by a photoresist layer, and the wafer is divided into a plurality of exposure regions; providing a feedback parameter map, wherein the feedback parameter map has a plurality of exposure-region feedback parameter sets respectively corresponding to the exposure regions of the wafer, and at least one of the exposure-region feedback parameter sets is different from the rest of the exposure-region feedback parameter sets, the feedback parameter map is obtained according to a device testing trend diagram, and the device testing trend diagram comprises a device threshold current trend diagram and a device leakage current trend diagram; and performing an exposure process sequentially on each of the exposure regions on the wafer through an exposure tool to pattern the photoresist layer according to the feedback parameter map, wherein an exposure process parameter set of the exposure tool is adjusted based on the exposure-region feedback parameter sets corresponding to each of the exposure regions in the feedback parameter map while the exposure tool performs the exposure process on each of the exposure regions.