Properties of the printed circuit board
a ground plane for shielding and power return. For microwave printed circuits, transmission lines can be laid out in a planar form, CAD design Projection, such as stripline or microstrip, with dimensions carefully controlled to ensure consistent impedance. In RF and fast switching circuits, the inductance and capacitance of the printed
Types of printed circuit board
copper), double-sided (two layers of copper on both sides of an insulating board), or multi-layered (outer and inner layers of copper alternating with insulating layers). Among the multi-layer PCBs, the most common are the four-layer ones. The four-layer CAD Projection, design board has many more routing options in the internal layers compared to the two-layer board, and often
Printed circuit board assembly
board populated with electronic components is called a printed circuit assembly, printed circuit board Projection, design CAD assembly, or PCB assembly (PCBA). In informal usage, the term "printed circuit board" most commonly means "printed circuit assembly" (with components). Components are generally soldered to the PCB both to connect them electrically and to