A-TECH immersion tin pcb finish factory for wholesale

Company Advantages
1. A-TECH immersion tin pcb finish is manufactured by adopting the highest standards in the sanitary ware industry, not just in terms of the choice of raw materials, but also the production processes. It can be printed with numbers, names, data codes, logos, or other specific information
2. A-TECH has great fame for its high quality immersion tin pcb finish . It has high tensile strength and can be deformed without breakage
3. The hardness on the Mohs scale of this product is good. The Mohs scale is the manifestation of the fastness and stability of its inner structure.
4. There are no burrs, spots or knots on its surface. Before the heat pressing process, the wood workpiece will be washed thoroughly to clean all the impurities. Its solderable surface is protected from the oxidation
5. The sealing of the product is good. There is a multi-layered sealing system in it, namely, the static ring seal, rotating ring, and other small sealing parts. Being laminated by advanced vacuum lamination equipment, it has a uniform dielectric thickness after lamination

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 set up professional R&D base to provide technical support.
2. Following our principle of 'providing dependable services and to be persistently creative', we define our major business policies as follows: develop talent advantages and layout investments to enhance growth momentum; expand markets through marketing in order to ensure full production capacity. Get price!