A-TECH wholesale China immersion silver pcb finish factory for wholesale

Company Advantages
1. A-TECH osp pcb finish is made of high-quality materials which are strictly selected by our experienced production team based on the application requirements and the industry quality standards. The product can be resistant to corrosion
2. If washed with hot water or dried with a dryer, the product is not easy to shrink. It is offered with low dielectric loss
3. The product has a definite elasticity. It is able to regain its initial shape and size after removal of load. It can be printed with numbers, names, data codes, logos, or other specific information

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 accumulated advanced production technology and the managerial experience for immersion silver pcb finish production.
2. We want satisfied customers to trust our products for a long time. We know that the image and name of a brand can only gain real value if it can see good works behind it. Please contact us!