Printed circuit boards (pcb) are conductive paths located on an insulating substrate with the role of connection between different electronic components.
The term "controlled impedance" refers to the electrical interconnection paths between electronic components that present a constant impedance when propagating signals.
The impedance depends on the path geometry and the electrical permittivity of the substrate.
Stack-up printed circuit boards 4 layers
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Stack-up printed circuit boards 6 layers
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Layer Top |
circuit made of a thin polyamide of 0.1-0.3 mm with a rigid printed circuit on an FR4 substrate. Controlled impedance These printed circuits are used more and more lately, having the advantage of their flexibility. A PCB may have an inscription or screen printing that identifies components, test points or identification text. Screen
a thin layer similar to varnish on the entire surface of the printed circuit Controlled impedance less on the soldering pads and it also has a role of antioxidation of the copper traces. Being a substance with a high degree of electrical insulation, the soldering mask offers the printed circuit the possibility of having a
PCB assembly (PCBA). In informal usage, the term "printed circuit board" most commonly means "printed circuit assembly" (with components). Components impedance Controlled are generally soldered to the PCB both to connect them electrically and to fix them mechanically. Printed circuit boards are used in almost all electronic products and some electrical products. Currently,
