Company Advantages
1. Our osp pcb are in various style, including lead free hasl pcb.
2. osp pcb are specially designed for lead free hasl pcb for an important function which can ensure optimal performance.
3. osp pcb represents the wisdom crystallization of our outstanding lead free hasl pcb.
4. The development of this product has good social and broad market prospects.
5. The unchanging high quality of osp pcb wins big trust from customers.

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.

Company Features
1. A-TECH CIRCUITS Co., Ltd. has acquired a larger customer base with its reputation.
2. The factory has state-of-the-art equipment, including manufacturing machines and quality testing devices. The equipment contributes a lot to guarantee a stable production output.
3. lead free hasl pcb is A-TECH CIRCUITS Co., Ltd. original service idea, which fully shows its own superiority. Call! To establish the service concept of osp pcb finish is the base of A-TECH CIRCUITS Co., Ltd.'s work. Call! The service idea of immersion tin pcb finish in A-TECH CIRCUITS Co., Ltd. emphasize on osp coating pcb . Call! The essence in service theory of A-TECH CIRCUITS Co., Ltd. is hard gold pcb . Call!