Patent · US Active

Diffused aerial image model semiconductor device fabrication

US7571424B2 · kind B2 · utility

1Cited by
14References
3Claims
0Family size

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Key dates

Filing dateNov 3, 2006
Grant dateAug 4, 2009
Priority date
Expiry dateNov 27, 2026

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03F7/705
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A lithography method has a simulation method for mathematically approximating a photoresist film pattern with a Diffused Aerial Image Model (“DAIM”) for semiconductor device fabrication. The DAIM is applied with at least two acids having heterogeneous diffusion characteristics.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.