highly-rated pcb surface finish solder bulk production at discount

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!

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A-TECH pcb surface finish has to pass a series of tests. They include mechanical strength test, resistance to heat and fire test, overload protection test, etc. It helps ensure the vehicle keeps moving loner miles without any issues

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The design of A-TECH enig pcb finish is conducted under CAD technologies. The CAD technologies illustrate the exact locations of electric components and the arrange of circuits of the product. It will not break down with regular use

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A-TECH pcb surface finish has passed the electrical safety testing, including electromagnetic disturbance level testing, surge testing, electrostatic discharge testing, and electric leakage testing. It helps extend the lifespan of the engine

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A-TECH immersion tin pcb will be sent to specific testing organizations. It has been certified under several essential certifications for electric appliances, including CE, CCC, RoHS, SAA, etc. It helps ensure the vehicle keeps moving loner miles without any issues

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The quality of A-TECH immersion tin pcb are ensured. It has passed a number of quality control checks and tests, including color shading, colorfastness check, size fitting test, etc. It has been sold to South America, North America, Europe, Africa, Southeast Asia, etc

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This product is not vulnerable to moisture. It has been treated with some damp-proof agents, making it not easily affected by the water conditions. It can be used under any extreme conditions

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