hot-sale enig electroless nickel immersion gold free Suppliers 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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A-TECH enig electroless nickel immersion gold is produced in a dust-free and bacteria-free workshop in which the temperature and humidity are strictly controlled and monitored, so as to ensure its high quality. Thanks to the up-to-date vacuum DES line, it is manufactured with fine traces and high density

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A-TECH enig pcb finish is manufactured with premium diode to rectify, detect, and stabilize circuits, in this way, it helps achieve the electrical current equilibrium. It can be manufactured with a customized thickness

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A-TECH enig electroless nickel immersion gold is developed containing special Electro-Magnetic Interference Suppression Components. These components help reduce or eliminate noise caused by electromagnetism. It has low water absorptivity in the damp environment

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To be responsible for consumers, A-TECH enig electroless nickel immersion gold is strictly tested by various regulations and standards home and abroad, including RoHS, CE, CCC, FCC, etc. It has passed AOI which ensures there will be no errors or welding defects

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In the manufacturing process of A-TECH enig pcb finish, every production stage is under strict control to prevent issues such as too many sluggish components or parts, high rework rate, and defective percentage. A smooth part is added on its PTH line to reduce the roughness of through hole

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This product has electromagnetic compatibility. Designed in accordance with the EMC Directive, it does not generate or is immune to electromagnetic disturbance. It is widely used in different electronics industries, such as telecommunication and consumer electronics

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A-TECH free enig electroless nickel immersion gold Suppliers for wholesale