hot-sale immersion tin pcb tin bulk production at discount

Company Advantages
1. The colors of immersion tin pcb is highly pure. It is 100% produced in accordance with IPC-6012 & IPC-A-600F standards
2. With high operational accuracy, the product is not likely to occur errors, which eventually beneficial to reduce production costs. It is lead-free and environmental-friendly and has passed SGS test
3. a team of skilled quality controllers handles the quality checks that are conducted to examine and ensure the flawlessness of the offered products. It has low water absorptivity in the damp environment
4. The product is well known for its convenience and good durability. Its solderable surface is protected from the oxidation

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. A-TECH is widely popular in manufacturing immersion tin pcb market.
2. A-TECH PCB hosts some of the world's leading researchers in enig pcb field.
3. We are committed to run business in a healthy and safe way. We conduct the corporation's activities centering on the clients, employees, and communities so as to ensure our sustainable development.