The production process of LED street light made in China

LED street lighting  Manufacturing Process OverviewLED production process including upstream production of single- wafer substrate , epitaxial wafer growth ; midstream chip, electrode fabrication , cutting and testing sorting ; downstream product package.Figure 2.1 LED manufacturing flowchart
LED manufacturing flowchart
§ 2 LED chip production processLED lighting can be applied to the field thanks to high brightness LED chip production technology continues to improve , including a single chip power and brightness increases . LED upstream production technology is the core technology of the LED industry , is currently the leading countries in the technology mainly in Japan , USA, Korea , and Taiwan , and mainland China in the LED upstream production technology by comparison . The following figure shows the microstructure of the upstream epitaxial wafers schematic .
Blu-ray micro- structure epitaxial wafersFigure 2.2 Blu-ray micro- structure epitaxial wafers
The production of high brightness LED chips , has been developed around the world devote goal and direction of LED hair . Currently , the use of high-power chips produced by the white 1W LED Lumen has Danone to 150lm high. LED upstream technology will enable the development of LED lamps getting lower and lower production costs , more LED lighting advantage. In the following example to introduce its blue LED wafer production process is as follows : First, on the production of gallium nitride liner low (GaN) -based epitaxial wafers, this process is mainly in the metal organic chemical vapor deposition of epitaxial wafers furnace (MOCVD) of completion . Ready to produce GaN-based epitaxial wafer and a variety of source materials required purity of the gases , follow the step by step process requirements of the wafer can be done. The substrates used are sapphire, silicon carbide and silicon substrate , and GaAs, AlN, ZnO and other materials.MOCVD is the use of gaseous reactants ( precursors ) and the organometallic group Ⅲ and Ⅴ family reaction of NH3 on the surface of the substrate , the desired product is deposited on the substrate surface. By controlling the temperature, pressure, reactant concentrations and type of scale , thereby controlling the coating composition , the crystal quality of the same . MOCVD epitaxial furnace production of LED epitaxial wafers is the most commonly used devicesIs the LED PN junction and two electrodes for processing , the electrode processing is the key process of production of LED chips , including washing , evaporation , yellow, chemical etching , fusing , grinding ; then dicing the LED MAO , tests and of selected , you can get the desired LED chips .
LED production processFigure 2.3 LED production process
§ 3 high-power LED production processAs LED energy-saving light source power LED, which is a core part of LED energy-saving lamps . High-power LED production process how to directly affect the LED performance, thereby affecting the performance of LED lamps , such as the light fades , light effects and so on.§ 3.1 LED packaging processHigh-power LED packaging products, for example , introduced its packaging process is as follows:
High-power LED street lighting  packaging processFigure 2.4 High-power LED packaging process

1 to Silicone Qiao Yue OE-6250 (A): Joe Vietnam OE-6250 (B) = 1:1 for with plastic .(2) Exhaust : 1 atm / 5mins.3 to suppress lens tweezer top , and then the needle inserted into the ear hole lens filling plastic , glue dispenser pressure at the point first raised 0.15MPA, then noted in the viscosity of glue to make adjustments until the glue from the right face place a small amount of overflow.4 levels of the whole piece bracket upside down , the force compaction .5 more plastic parts with a cotton swab to wipe clean.6 good irrigation glue without baking, the level of the stand at room temperature in a stainless steel plate upside down neatly stored within 24 hours can be.

1 Test : IF = 350mA, VF> 4.0V is bad , VR = 5V, IR> 10uA for the poor .2 test Appearance: Have bubble , debris ﹑ pillars yellow.3 type, quantity, packaging is correct, packaging appearance without defect .
§ 4 LED energy-saving lamps production processLED lighting is the use of LED light source in combination with optical , thermal, mechanical, electrical , aesthetic and other disciplines of knowledge produced a highly efficient energy-saving lamps.
LED energy-saving lamp production technologyFigure 2.5 LED energy saving lamp production technology
More info you can visit:http://www.lead-lighting.com/products/bid31-1.htm