highly-rated pcb surface finish hard bulk production at discount

Company Advantages
1. A-TECH pcb surface finish is manufactured by adopting the latest metal working equipment which includes CNC laser machine, water-jet cutting machine, punching, forming, welding and finishing machine.
2. osp coating pcb has been become a developing trend of pcb surface finish market.
3. The benefits of this product have been proven over time. It is not only highly efficient in production, but also helps save labor costs.
4. The user can embrace the bedding package without worrying because the fabric used is healthy and has been certified hypoallergenic.

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. Time goes on. A-TECH CIRCUITS Co., Ltd. has grown into a manufacturer that specializes in developing, supplying and marketing pcb surface finish .
2. The technology level of A-TECH CIRCUITS Co., Ltd. is high comparing to other companies.
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. Customers can be sure that their products — whatever stage of the process — are under our strict production control and in the hands of experts at all times. Contact! To achieve sustainability, we make sure our activities do not cause environmental damages. Henceforth, we will create a sustainable business for our clients and other stakeholders.