A-TECH hot-sale enig pcb free delivery for wholesale

Company Advantages
1. The design of A-TECH osp coating pcb takes many physical and chemical properties into consideration. They are strength, durability, handle, elasticity, colorfastness, luster, friction properties, moisture absorbance, heat isolation, abrasion resistance, etc.
2. The product has a good sealing effect. The sealing materials used in it feature high airtightness and compactness which does not allow any medium to pass through.
3. The product helps create a relaxing bathing or washing atmosphere, representing different lifestyles. It is especially suitable for those who think highly of life taste.

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. specializes in manufacturing enig pcb with high quality and stable performance.
2. We own our production workshop. Newly introducing many cutting-edge manufacturing facilities, the workshop lays a solid foundation for self-development and production, and more than 80% of the processes are independently completed in this workshop.
3. Integrity is our corporate value. We are honest with employees, customers, partners, communities, and ourselves. We will always do the right thing. We have been pursuing the healthy development of the community and creating benefits for society. We are willing to cooperate with local businesses to spare no effort to create economic benefits and values to drive local economic development. We are committed to achieving a totally safe, sustainable waste management way. We will professionally process the wastes and control the carbon footprint in the transport of production wastes. We value sustainability. Therefore, we will adopt sustainable approaches and be responsible for increasing the positive impacts of our production and products.