Research And Preparation Of Conductive Silver Adhesive Applied In LED Package

LED(Light Emitting Diode) is a kind of the electric energy directly into light energy of semiconductor components, with the continuous development and application of new technology, Because LED has characteristic and performance of high efficiency, energy saving, small size, rich colors, good direction, cheap price and long service life. LED is widely used in display, general lighting decoration, etc.. In recent years, LED industry is rapid developing in China, China has become an important source of LED production base in the world, and the conductive silver adhesive is one of the key materials in the LED package. conductive silver adhesive is also more and more attention of related industries. Silver conductive adhesive for LED package not only play a role of bonding chips and conduction. To ensure the temperature of the chip is not too high, silver conductive adhesive need efficiently transfer the heat that LED products when it work to the substrates. So the performance of silver conductive adhesive is directly related to the performance and service life of LED light source. Now LED die attach conductive silver adhesive is mainly monopolized by foreign companies. For example, Henkel's Ablestick, USA Epotech, Japan Kyocera. In recent years, with the increase of domestic investment in high-tech projects in China, and a number of Chinese engineers have working experience in foreign company of the silver conductive adhesive enterprises participate in researching and development silver conductive adhesive, a lot of domestic production enterprises have set up research and development of conductive silver adhesive. But so far the silver conductive adhesive research and development of domestic company is still inadequate, there are few manufacturers, and just in an initial stage. In recent years, the LED industry has entered a stage of rapid development in the domestic market, domestic companies are in urgent need of advanced the technology and improve the quality of conductive silver adhesive, to break the Foreign capital company in the field of technology and price monopoly. However, so far the domestic brands silver conductive adhesive is widespread in the conductivity, batch stability, resistance to yellow, especially the shortage of the old resistance performance, and this performance directly affect the service life of the LED terminal products. In view of the above questions, this paper discussed the influence of performance additives, curing conditions, the morphological structure of silver, type of resin and curing system of silver conductive adhesive. And we studied the performance of acrylic modified epoxy hybrid resin conductive silver adhesive, for example the bonding strength, heat resistance, resistance to high temperature and high humidity resistance, yellowing resistance, electrical conductivity. In addition, we studied the effect of conductive silver adhesive three roller grinding guide process of silver conductive adhesive batch stability.