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| ulv481x0p |
 Wysłany: Wto 3:52, 15 Mar 2011 Temat postu: Compatible with the three SCR dimming LED |
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ilicon carbide: SiC as a substrate material second only to the extent of the application of sapphire, there is no third GaNLED substrate for commercial production. SiC substrates have good chemical stability, good conductivity, thermal conductivity, and do not absorb visible light, etc.,coffee neon sign, but also less prominent, such as the price is too high, the crystal quality Al2O3 and Si so difficult to achieve good machining performance is rather poor, In addition, SiC substrates absorb ultraviolet light below 380 nm, 380 nm is not suitable for development under UV LED. SiC substrate useful as conductivity and thermal conductivity, can solve the power type GaNLED heat dissipation devices, it is in the field of semiconductor lighting technology an important role. Compared with sapphire, SiC and GaN epitaxial film lattice matching is improved. In addition,LED billboard, SiC has a blue light-emitting properties, and low resistivity materials, can be produced
Thermal Grease and soft silicone pad thermal conductivity thermal grease and soft silicone pad to a simple comparison 1. Thermal conductivity: thermal conductivity of thermal grease thermal conductivity higher than that of soft silicone pad, respectively 4.0-5.5w/mk and 1.75-2.75w / m 2. Insulation: Thermal Grease by adding the metal powder insulation is poor,LED outdoor sign, soft silicone pad, good insulation thermal .1 mm thick electrical insulation index of more than 3000 volts.
3. Form: Thermal Grease for the condensate cream, soft silicone pad to thermal sheet. 4. Use: thermal grease evenly to be carefully applied, easy dirt around the devices and cause a short circuit; soft silicone thermal pad can be any cut, torn protective film directly attached to the use of , tolerance is small and clean. 5. Thickness: filling the gap as the thermal conductivity materials,restaurant board, thermal grease restricted, soft silicone thermal pad thickness ranging from 0.5-5mm, wide range of applications to teach.
thermal effects: thermal grease particles teach, and easy to aging. thermal effects in general; soft thermal conductivity due to soft and elastic silicone pad can greatly increase the heating element and heat sink thermal conductivity between the area of processing technology elaborate and complex, strong stability of the product 7.. Price: thermal conductivity of silicon fat has been widely used, low prices. soft silicone thermal pad used in notebook computers, more than a thin little sophisticated electronic products, prices slightly higher. heat is so simple: a can! |
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