Patent ID: 8278026

Claim:
A method for improving the efficiency of an electron-beam exposure, comprising: step 1) coating a positive photoresist on a wafer on which patterns will be formed, and performing a pre-baking; step 2) separating data of the patterns into a group of relatively large patterns and a group of fine patterns, optically exposing the group of relatively large patterns, and performing a post-baking; step 3) developing the positive photoresist; step 4) performing a plasma fluorination; step 5) performing a baking for solidifying the photoresist; step 6) coating a negative electron-beam resist and performing a pre-baking; step 7) electron-beam exposing the group of fine patterns; step 8) performing a post-baking; and step 9) developing the negative electron-beam resist, so that the fabrication of the patterns is finished.