Mask pattern generator employing EPL technology

Nobuyuki Yoshioka; Masaki Yamabe; Wataru Wakamiya; Nobuhiro Endo

doi:10.1117/12.504177

28 August 2003 Mask pattern generator employing EPL technology

Nobuyuki Yoshioka, Masaki Yamabe, Wataru Wakamiya, Nobuhiro Endo

Proceedings Volume 5130, Photomask and Next-Generation Lithography Mask Technology X; (2003) https://doi.org/10.1117/12.504177
Event: Photomask and Next Generation Lithography Mask Technology X, 2003, Yokohama, Japan

Abstract

Mask cost is one of crucial issues in device fabrication, especially in SoC (System on a Chip) with small-volume production. The cost mainly depends on productivity of mask manufacturing tools such as mask writers and defect inspection tools. EPL (Electron Projection Lithography) has been developing as a high-throughput electron beam exposure technology that will succeed optical lithography. The application of EPL technology to mask writing will result in high productivity and contribute to decrease the mask cost. The concept of a mask pattern generator employing EPL technology is proposed in this paper. It is very similar to EPL technology used for pattern printing on a wafer. The mask patterns on the glass substrate are exposed by projecting the basic circuit patterns formed on the mother EPL mask. One example of the mother EPL mask is a stencil type made with 200-mm Si wafer. The basic circuit patterns are IP patterns and logical primitive patterns such as cell libraries (AND, OR, Inverter, Flip-Flop and etc.) to express the SoC device patterns. Since the SoC patterns are exposed with its collective units such as IP and logical primitive patterns by using this method, the high throughput will be expected comparing with conventional mask E-beam writers. In this paper, the mask pattern generator with the EPL technology is proposed. The concept, its advantages and issues to be solved are discussed.

Citation Download Citation

Nobuyuki Yoshioka, Masaki Yamabe, Wataru Wakamiya, and Nobuhiro Endo "Mask pattern generator employing EPL technology", Proc. SPIE 5130, Photomask and Next-Generation Lithography Mask Technology X, (28 August 2003); https://doi.org/10.1117/12.504177

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KEYWORDS

Photomasks

Semiconducting wafers

System on a chip

Vestigial sideband modulation

Scattering

Electron beams

Silicon

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