• Title/Summary/Keyword: 엘이디발광체

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The Life Span of LED by the Rising Glass Transitions Temperature of Epoxy (에폭시 유리전이 온도상승에 따른 LED 수명의 변화)

  • Ban, Jae-Sam;Jung, Yong-Ho;Yang, Hyun-Sam;Kim, Sun-Jin
    • Journal of the Korean Society for Precision Engineering
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    • v.29 no.1
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    • pp.109-113
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    • 2012
  • The LED failure rate greatly depends on the physical properties of packaging materials (epoxy). The glass transitions temperature (Tg) of the epoxy is one of the most important physical properties. Therefore, in the present study, various epoxies with high Tg were prepared and their failure shapes were analyzed. In addition, the failure shapes depending on the amount of epoxy and the wire bonding structure were measured. As a consequence, the lower failure rate was obtained with the smaller amount of epoxy. The safety of LED was improved with increasing the Tg of the epoxy.