Company Advantages
1. peelable mask pcb has been developed using osp coating pcb idea, which has some distinct characters, such as hard gold pcb .
2. This product is naturally dust mite resistant and anti-microbial, which prevents the growth of mold and mildew, and it's also hypoallergenic and resistant to dust mites.
3. The product is characterized by low energy consumption. Built with the optimized circuit arrangement, it has less connecting wires, which helps reduce energy loss to some extent.
4. According to the requirements of customers, A-TECH has been successful into manufacturing peelable mask pcb with high quality.

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. is a China-based manufacturer of osp coating pcb . We specialize in design, production, and sales and is renowned in the industry.
2. Relying on superior quality and excellent service, our products are selling well in the American, Japanese, and the Middle East markets. At the moment, we are expanding more foreign markets.
3. A-TECH fantasies to precede over several firms in peelable mask pcb industry. Welcome to visit our factory! Our enterprise mission is established to ensure the service excellence and pcb surface finish quality. Welcome to visit our factory! Under the guidance of corporate management, A-TECH is growing toward a brighter future. Welcome to visit our factory! A-TECH PCB is one with our customers, treating your pain and success as our own. Welcome to visit our factory!