Patent ID: 7288478
Filing Date: 2007-10-30
Classification: H01L,Y10T

Abstract:
1. A structure formation method, comprising: providing a structure including: extending the photoresist hole by removing a portion of the BARC layer directly beneath the bottom wall of the photoresist hole such that an area of the top hole layer surface is exposed to the surrounding ambient via the extended photoresist hole, wherein said extending the photoresist hole is performed before any deposition of any layer on the patterned photoresist layer, and wherein said extending the photoresist hole comprises a directional etching of the BARC layer through the photoresist hole; and depositing a hole shrinking film (i) on the patterned photoresist layer, (ii) on a side wall of the extended photoresist hole, and (iii) on the bottom wall of the extended photoresist hole after said extending the photoresist hole is performed.