hot-sale pcb surface finish hard bulk production for wholesale

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4 layers PCB with IPC CLASS3 acceptance standard

4 layers PCB with SHENGYI S1000-2

4 layers PCB with impedance control

4 layers PCB with ENIG finish

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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.

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A-TECH pcb surface finish is produced in line with the strict specifications for phone models required by customers. From its materials selection to the size inspection stage, it will be tested by our QC team. It is far more energy-efficient thanks to LED technology

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The development of A-TECH hard gold pcb adopts different advanced technologies. It is developed under the enlightenment of energy keeping and ultra-quiet technologies. It gives off less heat, which can make cooler "Stage Area" for acts to perform or events to take place

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A-TECH hard gold pcb has been tested by our QC team. The tests include fatigue testing for electronic components and thermal insulation performance testing for materials. It does not have environmental issues common to traditional lighting solutions like fluorescent or mercury vapor lights

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A-TECH pcb surface finish is elaborately manufactured. The fabric patterning, sewing and cutting crews utilize the most advanced computer controlled cutting technology available which provides precision load analysis and tight tolerance. It is granted certificates such as RoHS and CE

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A-TECH pcb surface finish is expertly designed. It is designed based on outdoor environmental conditions, users’ preferences and building’s appearance appeals. It can create the perfect atmosphere during stage performances

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pcb surface finish Selected food-grade materials, made of first-class manufacturing technology and craftsmanship, non-toxic and harmless, healthy and environmentally friendly, you can use it with confidence.

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A-TECH hot-sale pcb surface finish bulk production for wholesale