2026-09-20T03:26:30Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/363082022-01-13T07:54:36Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Jung-Hoon Chun and Nannaji Saka.
Eusner, Thor
Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Massachusetts Institute of Technology. Department of Mechanical Engineering
2007-02-21T13:25:29Z
2007-02-21T13:25:29Z
2006
2006
http://hdl.handle.net/1721.1/36308
77755994
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.
Includes bibliographical references (leaf 30).
An important step in the manufacture of integrated circuits (ICs) is the Chemical Mechanical Polishing (CMP) process. In order to effectively use CMP, the removal rates of the materials used in ICs must be known. The removal rate of a given material by CMP can be determined once its Preston constant is known. The objectives of this work were to develop a method to determine the Preston constants and to measure the Preston constants of four low-dielectric-constant (low-k) polymers, labeled A, B, C, and D, and Cu. A weight-loss method, which measures the weight difference between the initial wafer and the polished wafer, provided repeatable results. The Preston constants ranged from 1.01 to 5.96 x10-'3 m2/N. The variation in measurements of the Preston constant ranged from 16% to 31%. The Preston constant of Cu was found to be 1.60 + 0.50 x10-13 m2/N. Of the four polymers, Polymer A had the smallest Preston constant, 1.01 i- 0.30 x10-13 m2/N. It was also determined that there is an approximate inverse linear relationship between the Preston constant of the four low-k polymers and their Young's moduli of elasticity. An approximate inverse linear relationship between the Preston constant of the four low-k polymers and the hardness was also observed.
by Thor Eusner.
S.B.
30 leaves
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Mechanical Engineering.
Determining the Preston constants of low-dielectric-constant polymers
Thesis
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