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HAL(Lead Free), the full name is Hot Air leveling with Lead Free. Compared with HASL, the main difference for HAL(Lead Free) is the element of material which do not contain Lead(Pb), so it’s RoHS Compliant and it’s much more popular and widely used in PCB manufacturing.

HAL(Lead Free) requires higher run temperatures for lead free solder and longer contact time, the production cost for HAL(Lead Free) is slightly higher than HASL(Tin/Lead).

The manufacturing process of HAL(Lead Free) is similar to HASL(Tin/Lead), the circuit boards will be submersed in molten solder(Lead Free). This solder will cover all the exposed copper surfaces. Upon retraction from the solder, high pressure hot air is blown over the surface through air knives, this levels the solder deposit and removes the excess solder from the surface of printed circuit boards.

The typical thickness of HAL(Lead Free) is 1-40um and the shelf life is 12 months.

The advantages of HAL(Lead Free) surface finish

● Good solderability / wettability
● RoHS Compliant
● Good reflow properties
● Large processing window is allowed
● Multiple thermal excursions
● Can be widely used

The disadvantages of HAL(Lead Free) surface finish

● Uneven surface
● Not suitable for PCBs with fine pitch
● Thermal shock
● Solder bridge
● Plugged or Reduced plated through holes

A-TECH have HAL(Lead Free) surface finish in house, It’s basically the highest proportion of finish used for circuit boards without fine pitch or high density layout. We don’t have any additional cost for HAL(Lead Free) surface finish.

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The manufacture of A-TECH osp surface finish pcb is of professionalism. The multistage production process is adopted. Its design, production, assembly, and testing will be controlled by separate teams. The product can maximize the effect of brand messages by making them be seen from all angles

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The materials used for A-TECH osp surface finish pcb satisfy exacting requirements, including the ability to withstand the handling likely to be encountered in normal operation, the ability to withstand metal fatigue and the ability to be unaffected by any other processes or treatment. The product features a vibrant, eye-catching graphics sublimation printing effect

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The design of A-TECH osp surface finish pcb involves sophisticated electric knowledge. Its circuit, including main circuit, pilot circuit, and signal circuit are designed with as less as possible connecting wires. The product can maximize the effect of brand messages by making them be seen from all angles

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The product uses less energy. With a battery charger, the product is more energy efficient than the cost and energy of making new batteries. The size of the product is customizable

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A-TECH Bulk buy custom osp surface finish pcb factory at discount