high quality pcb surface finish air cheapest factory price for wholesale

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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All manufacturing processes and test procedures of A-TECH enig pcb finish are strictly overseen by our professional workers according to the standards of building materials. Heng Xing branded mosaics are supplied at 30000 square meters per month

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A-TECH enig pcb finish is developed and constantly improved for its technical performance, making it perfectly suitable for innovative and future-oriented buildings. Hengsheng's glass mosaic tiles are applied widely, especially in kitchen, hotel and KTV

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The whole process of A-TECH enig pcb finish is energy efficient. The primary processes are improved including the design of its structure and the computer control of production. Over 2000 mosaic models have been developed

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Very little waste is produced in the production process of A-TECH enig pcb finish because all the raw materials are optimally used due to computer-operated production. Hengsheng's mosaics are available in different materials such as metal, ceramic, stone, and glass

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A-TECH pcb surface finish is created throughout a series of production processes which include raw material extraction, raw material process, and quality inspections. The surface finish of Heng Xing branded mosaics is glossy

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The product is able to meet the high quality requirements of many varieties of production. Hengsheng's mosaics are shape-various

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