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Proceedings Paper

Integration of ICP high-density plasma CVD with CMP and its effects on planarity for sub-0.5-um CMOS technology
Author(s): Jiro Yota; Maureen R. Brongo; Thomas W. Dyer; Kenneth P. Rafftesaeth; James A. Bondur
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Paper Abstract

The planarity and gap-fill requirements for interlevel dielectrics become increasingly stringent as design rules shrink below 0.5 micrometers . In this study, we investigated the resulting gap-fill and planarity (both before and after CMP) for an interlevel dielectric stack consisting of inductively coupled high density plasma (HDP) CVD oxide and a standard PECVD SiH4 oxide. Results show that the etch- to-deposition ratio and the thickness of the HDP CVD oxide will influence the final topography (both profiles and step height) before CMP. An optimum HDP oxide thickness was identified in order to achieve void-free deposition of the PECVD SiH4 oxide, minimize time to planarize, and maximize tool throughputs for HDP and CMP. It was also seen that the resulting planarity after CMP is significantly dependent upon the underlying feature and feature dimension. This paper provides information on the integration of HDP CVD oxide with CMP For a sub-0.5 micrometers CMOS technology, and on the optimum HDP CVD oxide deposition conditions and thickness necessary to achieve a cost-effective, production- worthy process.

Paper Details

Date Published: 13 September 1996
PDF: 10 pages
Proc. SPIE 2875, Microelectronic Device and Multilevel Interconnection Technology II, (13 September 1996); doi: 10.1117/12.250875
Show Author Affiliations
Jiro Yota, Rockwell Semiconductor Systems (United States)
Maureen R. Brongo, Rockwell Semiconductor Systems (United States)
Thomas W. Dyer, Rockwell Semiconductor Systems (United States)
Kenneth P. Rafftesaeth, Rockwell Semiconductor Systems (United States)
James A. Bondur, Novellus Inc. (United States)

Published in SPIE Proceedings Vol. 2875:
Microelectronic Device and Multilevel Interconnection Technology II
Ih-Chin Chen; Nobuo Sasaki; Divyesh N. Patel; Girish A. Dixit, Editor(s)

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