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A-TECH bulk buy China osp surface cheapest factory price at discount

A-TECH bulk buy China osp surface cheapest factory price at discount

Thickness
≥1.0um
Shelf Life
6 Months
Solderability
Good
RoHS Compliant
Yes
Additional Cost
Yes
Supply Capacity
5000 ㎡/Month
Certifications
UL, ISO9001, TS16949
Payment Terms
T/T, Paypal, WU etc.
Shipment Terms
EXW, FOB, DDU etc.
Test Way
100% E-Test
Standard
IPC CLASS 2 / CLASS 3
Price
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Quantity Needed:
Pieces
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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 design of A-TECH osp surface considers how thread count, fabric type and denier (fiber thickness) will affect the overall performance, and the decisions are made based on how this product will be used. The product has been tested under frequent current measurements
The design of A-TECH osp surface is scientific and humanized. It is designed adopting the concept of less effort and minimized pool cleaning time provided by the designers. It can be customized into other core shapes, such as rectangular, circular, etc
Quality control and inspection are essential before A-TECH osp surface shipment. Detection is carried out to check whether the product contains non-standard or non-compliant components which are illicit in the phone accessory industry. This product works most stably and effectively under low-frequency conditions
All of the materials used in A-TECH osp surface are inspected for quality. The timber will be visually inspected to check for flaws such as wormholes and knots, and the board will be inspected to make sure moisture content must be not over 12%. The product is known for its high abrasion resistance
A-TECH osp surface is completed after a series of the production processes, namely, mold extrusion, turning, milling, drilling, lathing, grinding, and wire cutting. It is made of premium materials that are specially for power industries
The product has been audited and certified to be compliant with the strictest quality requirement. The product has excellent thermal stability, working stably from a wide temperature range
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