| Summary: | 碩士 === 中華科技大學 === 經營管理研究所 === 103 === The frame is the rack of the chips as well as the transportation medium for the inner electrics to the board. Taiwan suppliers of SMD LED frame share the world make about 18~21%. The usage of LED spread, LED supplier expanded the factory accordingly, the newer should face big challenge. Herewith the research for taking place of PPA plastic as the SMD LED reflector by Epoxy which is high temperature resistance & Good resistance to ultraviolet radiation intensity. It can increase the power from 0.5w to 0.7~2.0W.
Compare with the low power LED frame in the market, Epoxy need extra proceedure to remove the extra plastic, and the new proceeding is required as well, it may drop the rate of production, and increase the production cost, and the technology is not well developed still not grown enough that is why the high power LED still not popular yet.
So, This research on the foundation of the LED frame or the photoelectric company with many years development experience, develop the high temperature resistance & Good resistance to ultraviolet radiation intensity LED frame to fit for the mass production, and to obtain the molding parameter determination, including temperature and timing of the clamping force of transfer molding, transfer force, transfer speed, and the electricity and timing of deflasing, etc. Then to test the reliability during the assembly section. The test including High humidity environment test, High temperature weather resistance test,Red ink leakage test and UV test.
The result including two parts: squeeze pressure 16.7 kgf/cm²、 clamp pressure 100 kgf/cm²、Dispensing time 9-12s, deflasing power is 3A,electrolytic reaction time 3 minutes, then get the best parameter.No bubble and fall off during 168H test with 85% humidity & 85°C high temperature,non-discolouring with 2h roast of 150°C, and get 70% reflectivity with 1000h roast of 150°C, and pass Red ink leakage test.
And hereby, we got the the high power epoxy LED frame with UV resistant, and develop the tooling for the transfer-molding and assembly section. And research for the high power LED technology, Promote the competitiveness of the LED industry,Let the whole LED industry development in Taiwan leading force in Asia, China, Japan, South Korea, in international beyond Europe and the United States and other countries.
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