highly-rated immersion silver pcb leveling cheapest factory price for wholesale

Company Advantages
1. A-TECH hasl pcb finish is manufactured with high-quality raw materials which are strictly selected from suppliers.
2. The testing of the product is strictly conducted.
3. hasl pcb finish has a great advantage over other immersion silver pcb in the market.
4. The offered product is widely appreciated among our clients for these features.
5. This product becomes a hot spot among customers in the industry recently.

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 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. It is widely known that A-TECH is specialized in immersion silver pcb industry.
2. Being sold well in the industry, pcb surface finish is famous for its high quality.
3. Our customers are at the heart of everything we do. We design products that they need, and we listen carefully to their voices to understand their specific requirements. To meet customers' needs, our company strives to create customer value through innovation, excellence, a focus on team and respect for the individual. We uphold a corporate culture of collaboration. We encourage employees to work together and deliver more business success through shared goals of mutual support.