high quality immersion silver pcb finish silver for business 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.

j******g

A-TECH [拓展关键词 is fully tested under a series of equipment. The testing includes illumination intensity, beam angle, and impulse voltage capacity. Specially galvanized, it is therefore suitable for outdoor applications

z******t

Before A-TECH enig pcb finish is shipped to the gifts or art&crafts stores, it must be checked for its design, color, and quality when the initial product comes out. This product represents a cost-effective and reliable solution for short-distance transportation

s******a

During the production of A-TECH enig pcb finish, it has gone through heat and surface treatments: hardening, induction hardening, chemical browning, and electroless nickel plating. This product allows for easy maneuverability in tight spaces

m******y

Each production stage of A-TECH enig pcb finish is strictly conducted by advanced machines including CNC lathes, milling machines, grinding machine, cutting machines, and bending machines. This product is widely used in factories, workshops, warehouses, supermarkets, etc

s******n

The manufacture of A-TECH immersion silver pcb finish is of high efficiency. It is made under the CNC cutting, milling, and drilling machines which help improve efficiency in creating mechanical parts. The operation of this product is designed intuitively and simple

t******r

enig pcb finish is still valuable due to its advantages as immersion silver pcb finish. This product stands out for its strong carrying capacity

Product Message

*Name

Phone

*E-mail

*Content