A-TECH hot-sale enig pcb bulk production at discount

Company Advantages
1. A-TECH tin plating pcb meets the regulatory requirements of the textile market. The textile fibers, dyestuff, and different kinds of agents used in it are guaranteed to meet the standards.
2. High-end talents and advanced technology have enabled the product quality to reach the industry's leading level.
3. The product caters to the requirements of customers in the industry and is bound to have a wide range of application prospects.

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 CIRCUITS Co., Ltd. has been absorbed in the manufacture and supply of enig pcb exquisite in technology and excellent in craftsmanship.
2. A-TECH CIRCUITS Co., Ltd. focuses on engineering and R&D progress.
3. The service quality has been always highly stressed by A-TECH. Get price! A-TECH always sticks to the principle that quality is above everything. Get price!