Company Advantages
1. A-TECH immersion tin pcb finish has been tested. It has achieved a BS 5234-2: 1992 severe duty rating which is conducted by an accredited laboratory. It is vacuum-sealed, which can greatly reduce the bulk of the overall cargo
2. A-TECH is a development and production of enig pcb company with strong strength. Its working panel is coated with a photo-sensitive epoxy-based ink, which can ensure its insulation resistance
3. The product has obtained international quality certificates and meets the quality standard of many countries and regions. A smooth part is added on its PTH line to reduce the roughness of through hole
4. The quality of the product can withstand the test of time. It can be manufactured with a customized thickness

OSP, the full name is Organic Solderability Preservative, it preserves the copper surface from oxidation by applying a very thin protective layer of material over the exposed copper usually using a conveyorized process. It uses a water-based organic compound that selectively bonds to copper and provides an organometallic layer that protects the copper prior to soldering. It’s also extremely green environmentally in comparison with the other common lead free finishes, which Suffer from either being more toxic or substantially higher energy consumption.

The typical thickness of OSP is 0.2 – 0.65um and the shelf life is 6 months. It’s a simple manufacturing process to make OSP, and like HASL finish, the production cost of OSP is lower than most of other surface finishes.

The applications of thick copper PCBs

● Cost effective / Low cost
● Simple process
● Excellent flatness
● Re-workable
● Clean, environmentally friendly process

The disadvantages of OSP

● Short shelf life
● Very sensitive to handling – gloves must be used and scratches avoided
● Short operating window between assembly stages
● Not suitable for multiple soldering processes
● Difficult to inspect or measure thickness

A-TECH own OSP line in house, it’s nowadays mainly used to build single-sided FR4 PCB or aluminum PCB with low cost requirements.

Company Features
1. Serving as a reliable manufacturer, A-TECH CIRCUITS Co., Ltd. sells enig pcb with high quality.
2. The stable development of A-TECH CIRCUITS Co., Ltd. means great input in quality and technology.
3. Undertaking sustainable development plans becomes vital in our business growth. From one aspect, we handle all kinds of waste strictly in line with regulations and standards; from another, we try best to cut energy consumption and reduce energy waste during the production processes.