Increased Temperature Resistance of Light -emitting Diode Structure

LED lamp bead pouring chips, unpackaged skills have recently caused a high -tech business in the LED industry. Due to the traditional LED lamp beads, the formation process of the formation of heat dissipation, light failure and other skills bottlenecks. LED lamp bead pouring chips and unpackaged skills as early as 10 years ago, the foreign countries to invest in huge capital research. The aimed at LED lamp beads from substrate glue and grain direct welding skills. It is completely eliminated by LED lamp beads formal chips in the appearance of many hair diseases, allowing LED lamp beads to withstand high temperature tolerance and extending LED lamp beads. The industry is all over the cutting -edge skills of the LED lamp beads packaging. & LED Lighting Daspeed How many wnbsp; but the question is: Why is LED lamp bead pouring skills? Relying on aluminum (copper) substrates, ceramic substrate processing molding, and installation are not as simple as metal substrates, because (twice) tin welding should withstand 280 degrees of high temperature, which cannot help but cause damage to the material and components. Ceramic substrates and metal substrates are not high than the reflection rate, and the transient light effect is difficult to improve. The limited heat conduction rate of ceramic substrates and the limited chip contact area also limited its stable light effect. LED lamp bead pouring process twice across tin welding and ceramic substrate aluminum substrate dual thermal resistance is enough to offset the upper wind just mentioned. In addition, the heat pressure welding and reflux welding of LED lamp beads are extremely high, and the yield is unstable. From the perspective of end users, a good LED device should have better lighting quality, higher lighting functions, lower system costs and faster investment returns. Holding LED lamp bead pouring skills in the future (LM yuan) value. In a sense, LED lamp beads packaging focus skills are the development and manufacturing skills of packaging brackets. COB LED lamp bead encapsulation and single -chip LED lamp bead packaging has revealed many strengths in terms of strong light, heat dissipation, light distribution, cost, etc. The traditional COB LED lamp beads now are the bracket that uses aluminum (or copper) substrates to integrate the FR4 fiber board into one. Domestic FR-4 semi-curing tablets, the thermal conductivity is only 0.3 /m-k, the best entrance is only 2.0 /m-k at the merchant, while the pure aluminum heating coefficient is 237 /m-k. It must increase the heat resistance of the system, causing severe LED lamp beads to decay and reduce the service life. Therefore, people's mind -to -mind ideas eradicate the insulation fiber of aluminum substrates.“LMCOB bracket”(Digging the copper leather and insulating layer of the aluminum substrate), but it is limited to the reason for equipment, gel, process and cost, and has not yet been promoted. In addition, the current market is widely popular so -called“Integrated light source”Scholar, accepting the injection molding process to inlaid the electrode plate in PPA (or the EMC that is currently pushing), because PPA will become yellow powder under high warm and ultraviolet irradiation, resulting in breathable water and water. The layout is because the electrode plate is higher than the chip 1.5 sister, and its fluorescent powder and gel dosage are very old. Not only will it increase the cost of packaging, too thick colloids will also affect the transmittance. At present, all COB LED lamp bead brackets have no exception to set up a enclosure layout to intercept fluorescent confusion gums without spilling, because the dam gel and the surface white oil absorbing light. Originally, the intensity of the light and heat transfer of the city is an important reason for the transient light effect of the traditional COB LED lamp bead light source and the difficulty of steady -state light effect. In the design of LED lamp beads, the most commonly questioned 5052LED lamp bead question is how to choose the driving power supply, and in fact LED lamp beads are dropped or destroyed, and the proportion of driving power is competent. Light bead lighting skills short board. However, the COB LED lamp beads aluminum substrates have accepted the decentralized packaging layout of thermal power, and (the chip is directly stated on the substrate).