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Evaluation of Applied Materials' Rapid Thermal Processor using Sematech Methodologies for 0.25 m Technology Thermal Applications-Part II

Published online by Cambridge University Press:  10 February 2011

Arun K. Nanda
Affiliation:
AT&T (Lucent Technologies) Assignee, SEMATECH, Austin, TX
Terrence J. Riley
Affiliation:
Advance Micro Devices, Austin, TX
Gary Miner
Affiliation:
Applied Materials, Santa Clara, CA
Michael F. Pas
Affiliation:
Texas Instruments, Dallas, TX.
Sylvia Hossain-Pas
Affiliation:
Texas Instruments, Dallas, TX.
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Abstract

Under a joint development contract with Applied Materials (AMAT) and Texas Instruments (TI), SEMATECH undertook a project (Joint Development Project J100) with a goal of delivering a cost effective, technically advanced Rapid Thermal Processor (RTP). The RTP tool was specified to meet the present and future manufacturing needs of SEMATECH's member companies. The J100 results contained here will focus on the temperature and control performance of the AMAT RTP tool. The J100 results on the temperature measurement and control performance of AMAT's RTP tool using bare backside monitor wafers were presented in part I. In actual manufacturing environments the backside conditions of wafers are not consistent which causes temperature variations during rapid thermal processing. In this experiment, boron monitor wafers with varying backside conditions were used to test the uniformity, repeatability, and stability of the tool. The wafer backside films were fabricated using predictions from emissivity models and were subsequently verified by experimental techniques. In addition, perturbation experiments utilizing boron and arsenic implanted wafers demonstrated a high degree of localized temperature control across the wafers. A 3-sigma temperature variation ranging from 3.0 °C (for wafers with similar backside films) to 6.0 °C (for wafers with varying backside films) was found for all wafers processed during this evaluation. The perturbation experiments, which included a forced temperature offset of two degrees at one of the wafer temperature sensors, resulted in a noticeable change in sheet resistance across the wafer.

Type
Research Article
Copyright
Copyright © Materials Research Society 1996

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References

1. Riley, Terrence, Nanda, Arun K., Miner, Gary, Pas, Michael, Hossain-Pas, Sylvia and Velo, Lino, This symposiumGoogle Scholar
2. Nanda, Arun K. and Riley, Terry, Process Monitor Wafers for Rapid Thermal Processors, The TMS Conference Proceedings on Transient Processing Techniques in Electronic Materials, February 5–7, 1996, Anaheim, CAGoogle Scholar
3. Schietinger, C. and Peuse, Bruce, Wafer Emissivity for RTP - Modeled and Measured, 3rd International Rapid Thermal Processing Conference, Amsterdam, The Netherlands, August 30-September 1, 1995.Google Scholar