Paper Title:
Size Effect on Tensile Strength of Surface-Micromachined Al-3%Ti Thin Films
  Abstract

A new tensile tester using an electromagnetic-force actuator (voice coil) was developed to measure the mechanical characteristics of surface-micromachined thin film materials. The tester has a load cell with maximum capacity of 0.5N and a non-contact position measuring system based on the principle of capacitance micrometry with 0.1nm resolution for displacement measurement. The tester was applied for tensile testing of Al-3%Ti thin films with dimensions of 1000μm long, 50-480μm wide and 1.0 and 1.1 μm thick. The Al-3%Ti is commonly used in RF(radio frequency) microelectromechanical systems(MEMS) switch. The specimen with holes and bridges was designed for easy tensile test. The holes at center of grip end are able to make alignment and gripping easy. The bridges are to remove the side supports easily and extract specimen from wafer without sawing. It was found that the mean tensile strengths of Al-3%Ti are 140-380MPa, depending on the width of specimens and converging to a certain tensile strength as the width decreases.

  Info
Periodical
Key Engineering Materials (Volumes 326-328)
Edited by
Soon-Bok Lee and Yun-Jae Kim
Pages
313-316
DOI
10.4028/www.scientific.net/KEM.326-328.313
Citation
J. H. Park, M. S. Myung, Y. J. Kim, C. S. Lee, S. H. Choa, W. S. Che, "Size Effect on Tensile Strength of Surface-Micromachined Al-3%Ti Thin Films", Key Engineering Materials, Vols. 326-328, pp. 313-316, 2006
Online since
December 2006
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Price
$32.00
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