With thick film technology optimization high power LED-2

With thick film technology optimization high power LED-2

In addition, the printing process printing IAMS slurry used the process is can choose areas of the printing process, so LED lights cost is low. Only in conductive insulating size printing circuit position. As long as the design appropriate, cooling hole is easy to directly connected to the high thermal conductivity of aluminum. And MCPCB and enhance the etching type heat printed circuit board, this method compared the waste materials few (the former two plank is chemically etched circuit), made of copper. The IAMS system, the conductor paste printing in need only formed the position of the circuit.

In addition, the IAMS technology, customers simply use a kind of insulation slurry. Other thick film technical requirements for each layer using two different types of glass slurry. In addition, all IAMS slurry are in line with RoHS regulations.

Mature technology

LED performance of the most important thing is the effective heat; That LED to keep a lower temperature help to increase brightness and prolong life. In order to prove that IAMS can provide LED the characteristics, manufacturer requires heat A oneled invited the third party testing. Oulu, Finland's company please heraeus the A ONELED technology research center for MCPCB IAMS and comparative study. A ONELED researcher Aila Sitomaniemi said: "we compared the use MCPCB and IAMS LED the thermal characteristics of the board. We tested 10 boards, each circuit boards are welding high power LED. Each circuit board are put into constant greenhouse, at the bottom of the circuit board will keep in contact with temperature 25 degrees Celsius, in order to ensure that each circuit board is efficient and the same cooling."

Sitomaniemi pointed out: "test results show that the size of the welding IAMS LED, operation temperature below the welding in the MCPCB LED by 350 ma. When the electricity flow, the average temperature of the locations at the low as many as three degrees by 700, as many as six degrees when ma low."

A ONELED researcher Eveliina Juntunen said, heat is leading the LED the performance of the devices key factors. Juntunen said: "the use of high power LED, by cooling efficiency must be to meet, colour, reliability and product life an increasingly strict requirements." Juntunen pointed out: "the measurement showed that the IAMS reduce the temperature of the engagement LED by IAMS., detected LED effective joint and circuit board at the bottom of the thermal resistance by as much as 20% lower than MCPCB". Juntunen said she thought these results are significant in the best way, in application LED has evident advantages.

Heat sink printing

IAMS technology future may directly will circuit in heat sink. Printing At present, in most LED assembly business, all buy shipped, then use the low temperature of LED gelling agent will LED and heat sink MCPCB. Then in a sticky Each one more layer will increase a thermal resistance, eventually detrimental to brightness and life.

Last fifteen years said Mr IAMS "filling technology make our customers can directly will insulating layer printing in heat sink, solving extra cooling base board (MCPCB, enhance heat dissipation type circuit boards, ceramics, etc) thermal resistance is increased. LED devices can be directly connected to the heat sink, provided the best cooling method."

Reduce the heat, prolong service life

The company's heraeus aluminum plate with material system by reducing the locations at the LED suite/layer number to reduce heat resistance. By using this formula, multi-function of a single system, the LED with lower cost manufacturers to design changes, and for selective printing insulating layer. Because it is low use cost base plate (such as aluminum), so can enhance extend the life of conductivity and LED.

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