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highly-rated pcb surface finish solder bulk production at discount

highly-rated pcb surface finish solder bulk production at discount
  • highly-rated pcb surface finish solder bulk production at discount

highly-rated pcb surface finish solder bulk production at discount

Immersion Tin, or Chemical Tin, it’s a RoHS Compliant metallic finish deposited by a chemical displacement reaction that is...
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Company Advantages
1. A-TECH enig pcb finish is designed meeting its compliance with the industry standards. Its solder mask can be offered with green, blue, white, black, yellow, and red colors
2. The product is applicable in the industry due to its promising development prospects. It can reduce the electrical signal loss and provides the highest efficiency
3. Our commitment to quality ensures that the product is always at the best quality. It has low water absorptivity in the damp environment


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 of our pcb surface finish still keeps unsurpassed in China.
2. A-TECH CIRCUITS Co., Ltd. has grand and ambitious ideas to become a high-end immersion tin pcb enterprise. Inquire!
pcb surface finish is made up of composite material.
Our product is widely demanded due to selected quality of immersion tin pcb which is durable and excellent. This product has a good retraction rate
Various enig pcb finish provided by A-TECH CIRCUITS Co., Ltd. has reasonable structure and reliable quality. The product is not affected by oil, grease, and other oily liquid
Selecting high quality of pcb surface finish materials, immersion tin pcb is healthy to be used. It is not likely to lose adhesion over time
The pcb surface finish is pretty and elegant in appearance. The base and film materials make it resistant to corrosion
The product features stable performance. All compounds are processed at high temperatures to achieve great physical and chemical properties. This product effectively prevents the passage of air, gases, and humidity
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