A Tribological Study of SU-8 Micro-Dot Patterns Printed on Si Surface in a Flat-on-Flat Reciprocating Sliding Test
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Tribological properties of optimized SU-8 micro-dot patterns on Silicon (Si) were evaluated using a flat-on-flat tribometer. Sliding tests on the patterns were conducted against a SU-8 spin-coated 2 × 2 mm2 Si substrate at varying normal loads at a fixed rotational speed. It was observed that the pitch of the SU-8 pattern on Si substrate had significant influence on the wear durability. Ultra-thin layer of perfluoropolyether was over-coated onto SU-8 micro-dot patterned specimens for enhanced wear durability, and the specimen of the optimized pitch 450 μm has shown a wear life of more than 100,000 cycles at a normal load of 650 mN.
KeywordsMicropatterning Tribology SU-8
The authors would like to acknowledge the financial support given to this study by the National Research Foundation (NRF), Singapore (Award No. NRF-CRP 2-2007-04).
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