A-TECH leveling immersion gold pcb free delivery for wholesale

Company Advantages
1. From material selecting to material processing, A-TECH CIRCUITS Co., Ltd. finish independently.
2. immersion gold pcb has outstanding functions of osp coating pcb .
3. Multiple times of tests and modifications, the product is guaranteed to be of the highest quality.
4. It is always able to keep things unique. The printing can help define its contents, which provides the customer with all the details to make an informed purchase.

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 focusing on the production of high-quality immersion gold pcb since inception.
2. The company invests a lot in cultivating a team of professional customer service staff. They have a keen sense of customers' feelings and needs and are always ready to handle concerns quickly and fairly.
3. We bear social responsibility. We understand that our responsibility for the environment goes beyond regulations and legal requirements and are committed to reducing our impact on the environment. Our company's goal is to bridge the gap between the client's vision and a beautifully crafted product ready to market. Ask online! To ensure timely delivery, we use an efficient project management system. It allows us to invite all our managers and assign tasks to them within a given time frame. Ask online! Customer satisfaction is of paramount importance in our company. We will not compromise the quality of our products and services. Ask online!