highly-rated enig rohs carbon manufacturers for wholesale

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 enig rohs is strictly tested. On-site checks are carried out following detailed checklists compiled based on customer requirements, international regulations, safety standards, and our extensive know-how. The images or characters produced by it can be stored for a long time without fading

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A-TECH enig rohs is exclusively designed. Many factors have been taken into considerations, from the circuit diagram to PCB CAD design or PCB layout. The thermal printing method adopted in this product helps reduce printing cost because it needs no ink

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The design of A-TECH enig rohs features precise parameters. It's designed under the CAD construction drawing which contains detailed material requirement, dimensioning, and other workmanship details. It offers many conveniences for users because it does not need to replace the ribbons and ink cartridges

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A-TECH enig rohs lives up to standards of CertiPUR-US. And other parts have received either the GREENGUARD Gold standard or OEKO-TEX certification.

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A-TECH enig rohs is produced under strict quality inspection regulations for practical tech accessory. It has been scrutinized to eliminate any harmful substances out. Without the capacity need for ribbons and ink, its design is more compact

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The product is of high quality and can withstand rigorous quality and performance tests. This product is very popular in many offices, clothes stores, printing shops, etc

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