China silver coating pcb hard company for wholesale

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4 layers PCB with IPC CLASS3 acceptance standard

4 layers PCB with SHENGYI S1000-2

4 layers PCB with impedance control

4 layers PCB with ENIG finish

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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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enig pcb finish Selected high-quality environmentally friendly materials, using advanced manufacturing technology to make it carefully, with good quality, excellent quality, durable, and strong practicability.

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enig pcb finish It adopts a flip touch screen, which is sensitive in response and easy to operate.

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silver coating pcb Ergonomic design, light weight, easy to handle, comfortable to hold, very convenient to use.

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enig pcb finish Excellent material selection, fine workmanship, precise size, stable quality, and reliable quality. It is an axle product that integrates functionality and practicability.

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[企业简称] Insist on selecting high-quality rubber and plastic materials, adopt first-class production technology and precise processing technology to manufacture enig pcb finish, the enig pcb finish produced enig pcb finish has good gloss, good sealing performance, and is durable, enjoying a high reputation and reputation in the industry reputation.

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The quality of the product is guaranteed by our state-of-the-art facilities and advanced technology. Its quality has passed the strict test and is examined frequently. Thus its quality has been widely accepted by the users.

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A-TECH hard silver coating pcb company for wholesale