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http://dx.doi.org/10.6117/kmeps.2015.22.4.117

Deformation Behavior of Locally Stiffness-variant Stretchable Substrates Consisting of the Island Structure  

Oh, Hyun-Ah (Department of Materials Science and Engineering, Hongik University)
Park, Donghyeun (Department of Materials Science and Engineering, Hongik University)
Shin, Soo Jin (Department of Materials Science and Engineering, Hongik University)
Oh, Tae Sung (Department of Materials Science and Engineering, Hongik University)
Publication Information
Journal of the Microelectronics and Packaging Society / v.22, no.4, 2015 , pp. 117-123 More about this Journal
Abstract
In order to develop stretchable substrate technology for stretchable devices, locally stiffness-variant stretchable substrates were processed with two polydimethylsiloxane elastomers of different stiffnesses and their deformation behavior was characterized. Low-stiffness substrate matrix and embedded high-stiffness island of the stretchable substrate were formed by using Dragon Skin 10 of the elastic modulus of 0.09 MPa and Sylgard 184 of the elastic modulus of 2.15 MPa, respectively. A stretchable substrate was fabricated to a configuration of 6.5 cm length, 0.4 cm thickness, and 2.5 cm width. The elastic modulus of a stretchable substrate was increased from 0.09 MPa to 0.13~0.33 MPa by embedding a Sylgard 184 island of 1 cm width and 1~6 cm length into the center part of the Dragon Skin 10 substrate matrix. The elastic modulus of a stretchable substrate was improved to 0.16~0.2 MPa by embedding a Sylgard 184 island of 4 cm length and 0.5~1.5 cm width and to 0.1421~0.154 MPa by embedding a Sylgard 184 island of 2 cm length and 0.5~1.5 cm width. With increasing the tensile strain of a stretchable substrate, deformation restriction of the locally stiffness-variant Sylgard 184 island was further enhanced due to substantial increase in the strength difference between Sylgard 184 and Dragon 10 at large strain.
Keywords
Stretchable packaging; stretchable substrate; PDMS; stiffness; elastic modulus;
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Times Cited By KSCI : 5  (Citation Analysis)
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