Smd Lights With Led 5050 double color RGB high-power

LED high-power chip generally refers to what area of chip? why?

　　The high-power LED chips used for white light are generally around 40mil in the market. The so-called high-power chips generally refer to electric power above 1W. Since the quantum efficiency is generally less than 20%, most of the electrical energy is converted into heat, so the heat dissipation of the high-power chip is very important, requiring a larger area of the chip SMD Lights With LED.

　What are the different requirements of the chip technology and processing equipment for manufacturing GaN epitaxial materials compared with GaP, GaAs, and InGaAlP? why?

　　The substrates of ordinary LED red and yellow chips and high-brightness quaternary red and yellow chips are made of compound semiconductor materials such as GaP and GaAs, and they can generally be made into N-type substrates. The wet process is used for photolithography, and finally a diamond wheel blade is used to cut into chips. The blue-green chip of GaN material is a sapphire substrate. Because the sapphire substrate is insulated, it cannot be used as a pole of the LED LED light strip. The P/N two electrodes must be made on the epitaxial surface through a dry etching process. Some passivation processes are also required. Because sapphire is very hard, it is difficult to divide into chips with a diamond wheel blade. Its process is generally more and more complicated than that of GaP and GaAs LEDs Lamp Beads 5050.