A-TECH hot-sale pcb surface finish bulk production at discount

Company Advantages
1. A-TECH pcb surface finish is manufactured according to the regulations for electric appliances. Its Electro Magnetic Compatibility (EMC), ability to resist electric arc, overload protection, and heat dissipation capability have been assessed to at a qualified level.
2. pcb surface finish has the virtues such as pcb gold plating as compared with other similar products.
3. Excellent in pcb gold plating and fantastic hasl pcb finish are the biggest points of pcb surface finish .
4. We also has got the pcb gold plating certificates and hasl pcb finish society responsibility.

Immersion Tin, or Chemical Tin, it’s a RoHS Compliant metallic finish deposited by a chemical displacement reaction that is applied directly over the basis metal of the circuit board, the immersion Tin protects the underlying copper from oxidation over it’s intended shelf life, copper and tin however have a strong affinity for one another, the diffusion of one metal into the other will occur inevitably, directly impacting the shelf life of the deposit and the performance of the finish. The negative effects of tin whiskers growth are well described in industry related literature and topics of several published papers.

The typical thickness of Immersion Tin is ≥1.0UM and the shelf life is 6 months. The cost of Immersion Tin is more expensive than HASL but less expensive than Immersion Gold PCB and close to Immersion Silver. Similar to Immersion Silver, Immersion Tin is also sensitive in handling and storage, it requires PCB manufacturers to control and pack PCBs with Imm Tin more carefully.

The advantages of Immersion Tin

● Excellent flatness
● Mid range cost for lead free finish
● Good for fine pitch / BGA / smaller components
● Top choice for press fit technology
● Reworkable

The disadvantages of Immersion Tin

● Very sensitive to handling – gloves must be used
● Exposed Tin on final assembly can corrode
● Not good for multiple reflow/assembly processes
● Aggressive to soldermask – soldermask dam should be more than 5mil
● Baking prior to use can have a negative effect

A-TECH is capable of using Immersion Tin, we make the profile and electrical test before the process of Immersion Tin finish, and we use papers to separate each piece of boards to avoid scratches during package and transportation.

Company Features
1. A-TECH CIRCUITS Co., Ltd. has been focusing on producing and technology researching of pcb gold plating since establishment. We are highly reputable in the domestic market.
2. We are backed by a team of product experts. Depending on their years of industry expertise, they help assist in technical sales and product development by providing innovative insights.
3. A-TECH has gradually expanded its share in the national and international markets. Check it! A-TECH CIRCUITS Co., Ltd. is responsible and very concerned about the needs of customers. Check it!