The hottest Toray Corning new silicone resin is us

Toray Dow Corning's new silicone resin is used for white LED packaging and lens

ink href= "/common/shared/ctl/displayeditorial.css" type=text/css rel=stylesheet> Toray Dow Corning was in Japan from July 12 to 14, 2006? At the "interopto`06" held in the city, new silicone products and development products for light-emitting diode (LED) packaging and lens were displayed. With the increasing output power of white LED, silicone resin with good short wavelength light transmittance and heat resistance will be more and more used in packaging materials and lenses. Due to the different requirements of LED manufacturers on the hardness, viscosity, refractive index and so on, the company is actively expanding its product lineup

the new silicone products and development products in this exhibition include ordinary refractive index 1.41, three ordinary types for LED packaging, four products for packaging with refractive index increased to 1.52, and two products for lens forming. The viscosity of broken oil changes with the temperature and pressure of the liquid. The three products with emissivity of 1.41 are: the hardness after hardening is 60 ~ 70 degrees, and the viscosity before hardening is 1.46pa? S' new product "oe6336", with the same hardness and viscosity of 3.4pa? S the advantage of this kind of sensor is that it can speed up the differentiated development of products after reorganization. The new product "eg6301", which is directly connected to the power supply of vehicles, and the developed product "oe6340", which has a hardness of 40 degrees and a softening to gel detection method that meets the requirements of gb10128 (2) 007 experimental method for changing room temperature of metal materials and jb/t9370-1999 technical conditions for changing experimental machines. Oe6336 and eg6301 with different viscosity are used for the packaging of white LEDs respectively, and the color temperature is changed by changing the number of fluorescent particles dispersed in the packaging material. The colloidal oe6340 is mainly supplied to customers who pay special attention to the peeling of packaging materials

four products with refractive index of 1.52 for packaging include the developed product "oe6665" with hardness of 65 degrees; The new product "jcr6175" with hardness of 50 degrees and the developed product "oe6520" and the colloidal developed product "oe6450" with "penetration" of 50mm/10 indicating softness. When these silicone resins with high refractive index are used as packaging materials, the refractive index of the packaging materials is similar to that of the LED chip, so that the light emitted from the LED chip can be projected outside more chips. Overseas led manufacturers have more orders. Compared with jcr6175, the developed product oe6520 with a hardness of 50 degrees improves the adhesion and controls the volume change after hardening. Colloidal oe6450 is mostly used with silicone resin with high hardness. For example, the place close to the LED chip is covered with oe6450, and the outside is covered with silicone resin with high hardness

the two products used for lens forming include the developed product "oe4705" with higher viscosity and easier forming than the original product "sr7010" of Toray Dow Corning and the developed product "oe6665" with a hardness of 65 degrees for packaging. Oe6665 hangs on the printed circuit board of the encapsulated LED chip and is used for chip packaging and lens forming at the same time (Figure 3). Due to the adhesion equivalent to the packaging purpose, it can be used to fix the LED chip. Another reason is? The shading will become convex. This "overmolding" method, as a manufacturing technology that fixes multiple white LEDs on the printed circuit at low cost, is expected to increase the opportunities for adoption in the future

information source: Technology