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Electron beam proximity printing: Complementary‐mask and level‐to‐level overlay with high accuracy

 

作者: P. Nehmiz,   W. Zapka,   U. Behringer,   M. Kallmeyer,   H. Bohlen,  

 

期刊: Journal of Vacuum Science&Technology B: Microelectronics Processing and Phenomena  (AIP Available online 1985)
卷期: Volume 3, issue 1  

页码: 136-139

 

ISSN:0734-211X

 

年代: 1985

 

DOI:10.1116/1.583196

 

出版商: American Vacuum Society

 

关键词: MASKING;PROXIMITY EFFECT;LITHOGRAPHY;IMAGES;RESOLUTION;WAFERS;PERFORMANCE;PRINTING;INTEGRATED CIRCUITS;ELECTRON BEAMS

 

数据来源: AIP

 

摘要:

Electron‐beam proximity printing (EBP) is a promising candidate for submicron lithography because it meets the stringent requirements for resolution, throughput, and image fidelity (here defined as registration and overlay). Registration and level‐to‐level overlay capabilities of EBP are reported in this paper. Two levels of a chip were exposed and processed subsequently, these levels represented by two different patterns in the same mask. Distortions of both patterns relative to each other, amounting up to several hundred nanometers, were detected. These distortions could be automatically compensated for during exposure to yield an average overlay better than 50 nm. Together with the low data scatter of 3σ<170 nm, this indicates high performance of the EBP registration and distortion compensation procedure.

 

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