LED chip is the core component of the LED. It is a semiconductor chip, one side is attached to a stent, the end is negative, the other side is connected to the positive terminal of the power. It mainly functions to convert the electrical energy into light.
The LED chip can be divided into low-power, middle power and high-power chips according to different size. The common high power LED chip sizes are 38*38mil，40*40mil，45*45mil (mil is one measurement unit, a mil is one thousandth of an inch, that is 1mil=1/1000inch=0.00254cm=0.0254mm). The chip size can be customized based on customer requirements. And the specific chip size depends on actual production levels of the different chip manufacturers, there are no specific rule.