A-TECH hot-sale peelable mask pcb free delivery for wholesale

Company Advantages
1. All of the materials of A-TECH tin plating pcb are approved and tested to make sure that they meet all safety regulations in the tent industry.
2. This product features strong colorfastness. It has been checked under the dipping solvents, such as cleaning agents, water, and bleach, and the result shows no fading.
3. It contains few or no chemicals and substances whose use are restricted or banned. Chemical content testing has been performed to evaluate the presence of heavy metals, flame retardants, phthalates, biocidal agents, etc.
4. People will find that this product can stand frequent cleaning and numerous times of wear and tear without fading or getting dirty.

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. has experienced a good development with strengths of technology and capacity.
2. Our factory is equipped with international cutting-edge standardized production facilities. They are recognized as highly efficient and productive, hence, we can offer clients high-quality products and promise of delivery on schedule.
3. We are founded with the philosophy of providing the best and most cost-effective product solutions to customers across the world. We have come to realize and found ways to achieve this philosophy. Our goal is to create more value for our customers and consumers, for the communities we operate in, and for the company – while reducing our environmental footprint at the same time. Our company has a strong sense of integrity. All employees are expected to comply with ethical practices to ensure that our business is conducted with the highest level of integrity. We work hard to achieve our sustainability. For example, we develop and manufacture our products in a way that ensures they are safe, environmentally friendly and economical.