Metal laser sintering machine DM630

industrial

LEM Equipment is an advanced process system that utilizes a high-energy, focused laser beam to selectively, instantaneously, and locally heat the electrode area of PV cells, serving as an alternative or complementary solution to conventional high-temperature firing furnace to complete the sintering of metal paste and the formation of ohmic contacts. This equipment is deployed after screen printing and before conventional sintering process (or to fully replace the firing furnace). By precisely controlling laser energy density, pulse width, and scanning path, this system is capable of heating only the silver or aluminum paste area for just a few milliseconds (peak temperature reaching 800–950℃), melting the glass phase in the paste and penetrating the silicon nitride passivation layer to form a low-resistance electrical contact with the silicon substrate, while maximizing the protection of the surface passivation structure in the unexposed areas (such as poly-Si/SiOx in TOPCon cells or a-Si:H in HJT cells). The machine integrates green/infrared fiber lasers, high-speed galvano scanners, coaxial vision positioning, and infrared temperature feedback control. Technological Advantages Significantly enhanced performance (Voc increase of 2–5 mV and FF improvement of 0.2–0.5%) Ultra-fast response and high efficiency (processing time per cell 5200 pcs/hour) Key Parameters Cell size: 182mm (M10) to 210mm (G12) Cell thickness: 100–180 μm (support 80 μm ultra-thin cells) Laser type: Fiber laser (1064 nm), average power 50–100 W Spot size: 100–1500 μm (adjustable)