Thermal conductive silicone film in the LED high-power chip heat dissipation is very important: LED thermal conductive silicone film can be cut according to the size of the chip to patch, according to the power can be divided into small, medium and high-power chips. According to customer requests can be divided into single-tube level, digital level, dot matrix level and decorative lighting and other varieties. As for the specific standard size of the chip is based on the practical production level of different chip manufacturers, there is no specific plea. As long as the skills, the chip can be small to advance the unit output and reduce the cost, photoelectric function does not change the bottom.

LED chip current in practice with the current density flowing through the chip, the chip small use of current small, chip large use of current large, their unit current density is about the same. Assuming that the use of 10mil chip current is 20mA, then 40mil chip theoretically can be used to advance 16 times the current, that is, 320mA. but taking into account the thermal conductive silicon film heat dissipation is the primary problem under the high current, so its luminous power is lower than the small current.

On the other hand, due to the increase in area, the chip's body resistance will be reduced, so the positive guide through the voltage will be reduced. LED high-power chips for white light can generally be seen in the market are in the 40mil swing, the so-called high-power chips are generally used to refer to the electrical power of more than 1W. As the quantum power is generally less than 20. most of the electrical energy will be converted into heat, so the high-power LED light chip with thermal phase change paste or thermal conductive silicone film heat dissipation is very important, requiring a larger area of the chip. 

As we all know, LED work in the future its light intensity will follow the chip junction temperature increases and decreases, the luminous efficiency is reduced, which is the inherent physical properties of the semiconductor with the temperature change. LED light decay refers to the LED light source due to a certain material hazard no longer recover the failure phenomenon, that is, the LED light source in the rules of the time Within the rules of the time non-destructive luminous flux (initial light intensity) and lossy luminous flux (attenuation can not recover light intensity) of the ratio.