A-TECH mask osp pcb bulk production for wholesale

Company Advantages
1. A-TECH hard gold pcb has a very scientific design. Humidity, temperature, carbon dioxide and light, as well as other factors such as rain, airflow or noise, are environmental concerns in design.
2. The test results indicate that osp pcb has many merits such as hard gold pcb .
3. A-TECH CIRCUITS Co., Ltd. provides quality assurance, so osp pcb sells well all over the world.

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. The quality and quantity of osp pcb produced by A-TECH CIRCUITS Co., Ltd. are among the leading level in China.
2. Our advanced machine is able to fabricate such pcb mask with features of [拓展关键词/特点].
3. Each employee plays a role in making A-TECH CIRCUITS Co., Ltd. a strong competitor in the marketplace. Contact! As a developing company, A-TECH aims to be a pioneer in immersion tin pcb industry. Contact! A-TECH CIRCUITS Co., Ltd. will never lose its ambitions and still worked hard on supplying high quality carbon pcb . Contact! Only achieving efficiency first can A-TECH CIRCUITS Co., Ltd. win the future. Contact!