Patent ID: 7013453
Filing Date: 2006-03-14
Classification: G03F

Abstract:
1. A method for producing phase shifting layout data by a command script system that applies alt-PSM design rules, OPC, scattering bar rules, and gate blocking area generation comprising: (a) identifying a single line transistor gate in an integrated circuit; (b) defining phase shifting areas for an alternating phase shifting mask (alt-PSM), said alternating phase shifting mask including said single line transistor gate and first opaque areas; (c) providing a layout including phase shifting areas in an opaque field and another layout of phase θ° or phase (180+θ)° for said alt-PSM wherein θ is from 0 to 180; (d) assigning phase areas and opaque gate block areas (true gate) for a gate block layer; (e) providing a layout for a tritone attenuated phase shift mask (att-PSM) including interconnects (poly layer excluding gates), opaque gate block areas from (d), and sub-resolution scattering bars; and (f) processing the layout for optical proximity corrections and outputting a modified GDS layout for mask fabrication.