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4 layers PCB with IPC CLASS3 acceptance standard

4 layers PCB with SHENGYI S1000-2

4 layers PCB with impedance control

4 layers PCB with ENIG finish

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Impedance is the combination of the capacitance and inductance of a circuit when operated at high frequency. Control impedance in printed circuit boards are used across a broad range of applications to help ensure high signal integrity. Basically there are usually three types of impedance in PCB designs like single-ended impedance, differential impedance and coplanar impedance.

The factors affect impedance include: impedance trace width/spacing, copper thickness, dielectric thickness on either side of the impedance traces, dielectric constant of the core and prepreg material etc.

The applications of impedance control PCB include RF communication, Signal processing, High quality analog video, Computing 100MHz and above, Telecommunications and so on.

A large proportion of multilayer PCBs that A-TECH manufactured are with impedance control requirements, normally we will calculate impedance based on stack up and gerber designs to match with specified impedance values, our engineering dept might do necessary adjustments on stack up or impedance trace width/spacing if there is any mismatch after calculation. Moreover, the impedance coupons will be placed in each working panel which use for testing impedance values before shipment.

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The manufacturing of A-TECH press fit pins pcb requires many complicated techniques, mainly includes drying of the incoming timbers or logs, designing the door frame, plating the cross band, laminating the face veneer, etc. The product also has good moisture absorption, making people feel comfortable

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A series of manufacturing steps are covered in A-TECH hybrid circuit manufacturers. It has to be stamped, cut, coated, painted, dried, and assembled by skillful mechanical technicians. The product has excellent color fastness to sunlight and water

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The quality and safety of A-TECH hybrid circuit manufacturers conform to a variety of standards. It has passed both domestic and foreign electric standards. They are China's CCEE, GSG and CEMC, Japan's S-MARK and VCCI, Germany's VDE, and Canada's CSA. The product has a tidy and neat texture

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The coil springs A-TECH press fit pins pcb contains could be between 250 and 1,000. And a heavier gauge of wire will be used if customers require fewer coils. Its heat resistance performance allows it to adapt to the needs of customers

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The manufacturing processes of A-TECH hybrid circuit manufacturers involve several requirements. They mainly include the insulating performance for materials and safety testing for operation. The improved capillary effect adds great value to the product

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The product features low energy loss. This makes the overall energy consumption during the operation has greatly reduced to a low amount. Its natural fibers ensure it is skin-friendly and won't cause any allergies to people

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