Paper
5 September 1980 Feature Size Variation Of Electron Beam Exposure System (EBES) Master Masks
M. J. Cowan, R. F. Helm
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Abstract
The electron beam exposure system, called EBES, has been used since 1974 to produce 1:1 chromium master masks for integrated circuits. The I.C design rules for VLSI require mask specifications approaching the limit of technology. Data is presented showing the variation of feature size on both macroscopic and microscopic scales. The parameters which impact upon the observed intra-die, inter-die and inter-mask dispersions are discussed. The presentation is slanted toward characteristics important to VLSI, both to serve as a guide to designers and to define those areas which most severely limit achievement of better feature size control.
© (1980) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. J. Cowan and R. F. Helm "Feature Size Variation Of Electron Beam Exposure System (EBES) Master Masks", Proc. SPIE 0221, Developments in Semiconductor Microlithography V, (5 September 1980); https://doi.org/10.1117/12.958631
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KEYWORDS
Chromium

Photomasks

Plasma

Electron beams

Edge roughness

Opacity

Optical lithography

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