A-TECH free carbon pcb free delivery for wholesale

Company Advantages
1. Every piece of A-TECH hasl pcb finish is born in a scientific and orderly production process.
2. For better durability and endurance, our professional engineers successfully developed carbon pcb with high quality.
3. Our carbon pcb has many usages and is widely used in hasl pcb finish .
4. Our carbon pcb keep our company more competitive in the market and promote technology of hasl pcb finish to a fast development.
5. A-TECH CIRCUITS Co., Ltd. has increased its competitiveness in carbon pcb market through strenuous efforts.

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 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.

Company Features
1. A-TECH CIRCUITS Co., Ltd. is a reliable manufacturer of carbon pcb in China. We earn trust because of our experience and expertise.
2. Our staff marks our differentiation among similar manufacturers. Their industry experience and personal connections give the company the expertise and access to resources to produce better products.
3. Always following the vision of immersion silver pcb , A-TECH aims to be the leading manufacturer in this industry. Get info! It has been widely recognized that A-TECH now is a specialist in pcb mask industry. Get info!