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4 layers PCB with ENIG finish

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HASL, the full name is Hot Air Solder Leveling, it’s one of the traditional surface finish on printed circuit boards with long successful history.

To make the HASL finish, the circuit boards will be submersed in molten solder(Tin/Lead). 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.

HASL (Tin/Lead) surface finish is not RoHS Compliant, so it can be only available where RoHS exemption is permitted. The typical thickness of HASL is 1-40um, and the shelf life can reach to 12 months.

The advantages of HASL surface finish

● Excellent solderability / wettability
● Good reflow properties
● Low cost in manufacturing
● Large processing window is allowed
● Multiple thermal excursions
● Can be widely used

The disadvantages of HASL surface finish

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

A-TECH have HASL surface finish in house, it’s mainly used to build single sided or double sided PCBs with high solderability requirements but low manufacturing cost and without RoHS Compliant requirement.

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During the production of A-TECH peelable solder mask pcb, pollution or waste components generated from the production process is carefully and professionally treated. For example, the failed capacitor will be collected and disposed to a certain place. Its third shielding layer ensures maximum avoiding of EMI and RFI

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To guarantee its longevity, A-TECH enig pcb is finely developed with shock-proof and scratch-resistant capacity by our R&D team. The team has made much effort in improving its performance. This product has been certified under FCC, CE, PSE, and RoHS

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A-TECH peelable solder mask pcb 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. This product is easy to use with a range of features transmitted via a single connector

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A-TECH peelable solder mask pcb is developed containing special Electro-Magnetic Interference Suppression Components. These components help reduce or eliminate noise caused by electromagnetism. Its solid conductors help eliminate strand-interaction distortion and reduce jitter

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A-TECH peelable solder mask pcb is developed by adopting the most advanced integrated circuits technology. The R&D team makes the transistor, resistor, capacitor, and other components gather together to achieve a compact design. Its solid conductors help eliminate strand-interaction distortion and reduce jitter

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peelable solder mask pcb It is made of environmentally friendly materials, thick in texture, stable in structure, safe to use, high in quality, and not easy to break or break even after long-term use.

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A-TECH immersion enig pcb free delivery at discount