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Our company was established in May 2005. It is a high-tech enterprise specializing in the production, development and production of printed circuit board (PCB) impedance and high-precision buried blind vias (HDI) with high frequency control, and special dielectric materials. Our products include: double-sided boards, multi-layer HDI boards, impedance boards, FPC, rigid-flex boards, blind buried via boards, metal base (core) boards,high-frequency boards, high Tg thick copper foil boards, and customized various specific Printed circuit board required.
Impedance board definition:
The definition of characteristic impedance: at a certain frequency, in the transmission signal line of an electronic device, relative to a certain reference layer, the resistance of the high-frequency signal or electromagnetic wave during the propagation process is called the characteristic impedance, which is electrical impedance, inductance Reactance, capacitive reactance... a vector summation.
Classification of characteristic impedance:
The current common characteristic impedance is divided into: single-ended (line) impedance, differential (dynamic) impedance, coplanar impedance and so on.
Single-ended (line) impedance: English single ended impedance refers to the measured impedance of a single signal line.
Differential (dynamic) impedance: English differential impedance refers to the impedance measured in two transmission lines of equal width and equal spacing during differential drive.
Coplanar impedance: English coplanar impedance refers to the impedance measured when the signal line is transmitted between GND/VCC around it (the distance between the signal line and the GND/VCC on both sides of it is equal).
Impedance control requirements: When a signal is transmitted in a PCB wire, if the length of the wire is close to 1/7 of the signal wavelength, the wire at this time becomes a signal transmission line. Generally, signal transmission lines need to be impedance controlled. When making PCB, decide whether to control the impedance according to the customer's requirements. If the customer requires impedance control for a certain line width, the impedance of the line width must be controlled during production.
