Bulk purchase immersion tin pcb free Supply for wholesale

Company Advantages
1. Much advanced quality inspection equipment is used in A-TECH production. It is finely handled by the coordinate measuring machine (CMM), caliper, microcaliper, gauge, and pass meter. The product is certified under UL(E357001) and RoHS
2. Using this product would contribute to protecting the environment. It reduces greenhouse gases and air pollutants due to its energy efficiency. It has increased power densities which guarantee its long service life
3. It will not prone to deform under high temperature. Its metal structure is strong enough and the materials used have excellent creeping strength. Its robust structure allows it to be used in harsh environments
4. The product is good in heat transfer. The thermal interface materials fill the air gaps which have low heat conductivity, therefore improving the heat conduction path. The product can be resistant to corrosion
5. The product achieves a better heat dissipation effect. It is specially designed with a temperature higher than the surroundings to transfer heat by convection, radiation, and conduction. Its working panel is coated with a photo-sensitive epoxy-based ink, which can ensure its insulation resistance

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. is a manufacturer which specializing in providing immersion tin pcb for overseas markets.
2. Professional excellent review strictly controls all facets of hasl lead free production.
3. We believe that our will also be successful in our client market.