Production workers must wear anti-static gloves, anti-static wrist, electric iron must be grounded, non unarmed touch white LED two lead foot. Anti-static because the white LED 100V, workbench Operating Humidity 60% -90% of the body's electrostatic damage to the crystalline layer of light-emitting diodes, diode work after a period of time (such as 10 hours) will fail (not lit). Severe will immediately be invalidated. Soldering temperature of 260 ℃, 3 seconds. Temperature is too high, too long will burn the chip. In order to better protect the LED, the LED Colloid and PC board should keep more than 2 mm spacing, so that the welding(Welding Electrode) heat dissipated in the pin. 3.LED normal operating current of 20mA, slight fluctuations of voltage (0.1V) will cause substantial fluctuations in current (10% -15%). Therefore, pairing different limiting resistor in the circuit design should be based on the voltage drop of the LED to LED in top working condition. Current LED will shorten the life of, the current is too small, reach the desired light intensity. I company will bulk supply the LED spectrophotocolorimeter, and that same package of LED light intensity, voltage, light colors are consistent and indicate spectral color table. (1) soldering iron: the tip of the soldering iron (up to 30W) temperature does not exceed 300 ℃; welding time is not more than 3 seconds; welding position of at least 2 mm from the gel. (2) Wave Soldering: the highest dip soldering temperature of 260 ° C; the dip soldering takes less than 5 seconds; dip soldering position of at least 2 mm from the gel.
LED welding curve pin forming method: (1) must be 2 mm from the gel to bend bracket. (2) The stent fixture or done by professionals. (3) The stent must be completed before welding(Welding Consumables). (4) stent is the need to ensure the pin and spacing consistent with the circuit board.
Wash When chemical cleaning colloidal must be especially careful, because some chemicals on the colloid surface damage and cause discoloration such as trichlorethylene, acetone. Available ethanol wipe, dipping time of not more than three minutes at room temperature. The electrostatic protection electrostatic and the sharp rise of the current will damage the LED InGaN products use anti-static devices, such as protective belt and gloves.
Laser welding is a laser beam having excellent directivity, high brightness, high strength, high color, high coherence characteristics radiation to the region of the surface of the workpiece, the laser beam through the optical system is focused, the power of the laser focus density 104-107W/cm2, through the interaction of the laser with the object to be welded, within a very short time so that the weld is formed at a highly concentrated heat source zone, thermal energy after melting the welding region of cooling and crystallization form a solid solder joints and welds. There are two types, depending on the laser and its work, laser welding, a pulsed laser welding, mainly for single point fixed continuous welding and workbook materials, welding, forming a circular solder joint; Another continuous laser welding, mainly used for welding and cutting of thick pieces, forming a continuous weld during the welding process. Generally speaking, the choice of the Welding Material, laser welding machine, the selection, the selection of the machining table, is the main factor of the effect of laser welding. Melting phenomenon and for the welding process can produce and the strength of the generated degree depends mainly on the time, the power density of the surface of the material of the laser action and peak power, good control of each of the above parameters can be the use of laser for a variety of Welding Consumables processing. In laser welding, the beam focus position is one of the most critical control of process parameters, under certain laser power and welding speed, and only the focus is within the scope of the best location in order to obtain the maximum depth of penetration and good weld shape.