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Laser welding solder paste
VCM voice coil motor laser welding solder paste
Shenzhen huamao cheung electronic major research and development production of solder paste, for quick welding, laser and soldering iron and wuxi bead and few residues after welding. Bottom WenXi creams melting point is 138 ℃, melting point 180 ℃ warm, high temperature melting point 217 ℃. Particles are 25-45 um, 20 to 38 um, 15 to 25 um, 10-20 um. Alloy melting point: 210 ~ 220 degrees Celsius, the washing water can clean away flux, can use the needle diameter of about 0.25 ~ 0.15 point solder paste is not stuck needles, environmental protection, using 22 to 28 degrees Celsius temperature, deliver 100 ~ 200 g, use the needle to humidity 40 ~ 60% RH. Scope of application: camera module, VCM, CCM soldering iron, antenna, hard drive heads, speakers, speakers, optical communication components, temperature sensor, light sensor welding products: traditional way is difficult to assemble the improvement of precision, assembling and welding efficiency, at present the welding equipment with laser and HOTBAR welding machine, laser welding time is 0.3 to 0.6 seconds, HOTBAR soldering time is 5 to 10 s clock, temperature is 160-300 degrees, fast welding temperature is high, the ordinary solder paste it contains about 11% of the flux composition, the solvent such as volatile matter, about 5%, fast welding solvent such as volatiles will produce splash, splash in the thrum welding position leaving lots of beads and residue, if subsequent not clean, easy to cause a short-circuit. Fast welding process without solvent volatilization, tin beads no residual after welding, can completely eliminate the work of removing tin beads. This product for halogen free formula, few organic residue, and are transparent, surface impedance is high, high reliability. Application process is a little glue, printing and a variety of ways such as scraping gum.
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