Patent ID: 9048292
Filing Date: 2015-06-02
Classification: H01L

Abstract:
1. A method of forming a pattern, comprising: forming photoresist features over a substrate; at least one of the photoresist features having a narrowed region; the narrowed region comprising concave segments on opposing sides of the photoresist feature; the concave segments comprising outer surfaces; an opening extending from the outer surface of one of the concave segments to the outer surface of the other of the concave segments, and extending entirely through the narrowed region; trimming the photoresist features to reduce widths of the photoresist features, the trimming punching through the narrowed region to form a gap extending through said at least one of the photoresist features; forming spacers along sidewalls of the photoresist features; the spacers on opposing sides of said at least one of the photoresist features merging within the gap; and removing the photoresist features to leave a pattern comprising the spacers.