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high quality immersion silver pcb air free delivery for wholesale

high quality immersion silver pcb air free delivery for wholesale
  • high quality immersion silver pcb air free delivery for wholesale

high quality immersion silver pcb air free delivery for wholesale

A-TECH immersion silver pcb goes through numerous lab tests before mass production, such as dimensional stability at elevated temperature, bridge deformation and lens retention, lens size, thickness and curvature, etc.
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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.




The fabrics used for A-TECH pcb gold plating manufacture are in line with Global Organic Textile Standards. They have got certification from OEKO-TEX.
A-TECH immersion silver pcb has been certified under some certificates in domestic and overseas. These certificates are mainly National Compulsory Product Certification (CCC), IEC Safety Standards for Electric Appliances, and RoHS.
A-TECH immersion silver pcb meets European fire safety specifications. It has tested and certified by appropriate institutions to meet the F90 class fire resistance requirements.
A-TECH immersion silver pcb is under constant quality control. The quality inspection includes several parts: its pool cleaning capacity, compatibility with the water, and its color retention performance.
A wide range of tests for A-TECH immersion silver pcb has been conducted. It has been tested in some aspects such as circuit board, plugs, voltage, frequency, etc.
The product has been inspected in conformity with international quality standards.
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