A-TECH high quality pcb mask free delivery at discount

Company Advantages
1. A-TECH pcb gold plating is designed to create an original look that is truly unique.
2. The product is eco-friendly. It has passed the eco textile testing which proves it does not contain azo colorants and heavy metals.
3. People will not find any pungent smell which makes them shed tears or sneeze, and they can rest assured that the limited formaldehyde content does not have influence that causes health problems.

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 now is the leading enterprise in the market.
2. A-TECH CIRCUITS Co., Ltd. has a high-quality professional and technical team.
3. A-TECH CIRCUITS Co., Ltd. will use scientific and technological advantages to develop high-tech pcb mask to meet the market. Welcome to visit our factory! A-TECH values the work that can bring benefits to customers. Welcome to visit our factory! Since inception, A-TECH CIRCUITS Co., Ltd. has focused on market demand, constantly upgrading and improving our products. Welcome to visit our factory! A-TECH CIRCUITS Co., Ltd. is adhering to the professional spirit of continuous improvement and constant innovation. Welcome to visit our factory!