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4 layers PCB with IPC CLASS3 acceptance standard

4 layers PCB with SHENGYI S1000-2

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4 layers PCB with ENIG finish

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Plated half holes which is also called castellated holes, they’re normally designed at the edge of printed circuit boards and plated with copper, and they’re mainly used for board-on board connections, mostly where two circuit boards with different technologies are combined.

Most of the plated half hole PCBs are a type of modules which are small and high density with fine pitch components, this type of circuit boards are made with GPS Modules, Wifi Modules, Bluetooth Modules, GMS Modules, GPRS Modules and other smart modules.

Basically plated half holes are not suitable for V-score process, because the copper at the hole will be rolled up to cause serious burs, routing process is a better solution to ensure smooth edge.

The guidelines of designing plated half holes

● Normally the minimum half hole size is 0.8mm, it can be min 0.55mm with A-TECH capability
● The routing tolerance for half hole is +/-0.15mm
● The minimum distance from pad to pad is 0.25mm
● Use the larger hole diameter if possible
● Use the larger outer layer pad on both sides if possible
● Connect inner layer pads to the plated holes if possible to bring more stability and help to avoid burrs.
● Routing process is preferred and ENIG finish is preferred.

A-TECH have manufactured a large number of printed circuit boards with half hole design for various module products, and we have obtained rich experience to control high quality, the minimum half hole size we can build is 0.55mm.

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In the design phase of A-TECH press fit pins pcb, many factors have been taken into considerations such as static and dynamic deformations of the structures, stability, accuracy, and anti-fatigue performance, etc. Logos and images can be printed on the product by screen printing, heat transfer, and digital printing technology

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The manufacture of A-TECH thick copper pcb is of professionalism. The multistage production process is adopted. Its design, production, assembly, and testing will be controlled by separate teams. The product can maximize the effect of brand messages by making them be seen from all angles

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The materials used for A-TECH thick copper pcb satisfy exacting requirements, including the ability to withstand the handling likely to be encountered in normal operation, the ability to withstand metal fatigue and the ability to be unaffected by any other processes or treatment. The product is extensively used in companies, schools, clubs, and sports fields

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The design of A-TECH press fit pins pcb involves sophisticated electric knowledge. Its circuit, including main circuit, pilot circuit, and signal circuit are designed with as less as possible connecting wires. The double stitch workmanship ensures its excellent structural strength

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A-TECH thick copper pcb meets national energy efficiency standards. It is developed using different energy-saving technologies, including suppression of surge technology, frequency conversion technology, and electromagnetic regulation technology. As a display marketing strategy, the product can increase conversion rates

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The product uses less energy. With a battery charger, the product is more energy efficient than the cost and energy of making new batteries. The size of the product is customizable

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A-TECH Bulk purchase OEM thick copper pcb factory for wholesale