Meaning
Insulating substrate with conductive copper tracks used to mechanically support and electrically connect electronic components forms the physical foundation of almost all modern electronic assemblies. This printed circuit board uses etched copper foils laminated onto non-conductive fiberglass sheets to create the complex pathways required by the circuit design. It is bounded by the physical dimensions of the board and the electrical limits of the dielectric materials.
Structural Composition
Multiple layers of fiberglass prepreg and copper foil are laminated together under high heat and pressure to create a multilayer board. This design allows complex routing of electrical signals through different planes, with vertical copper-plated holes connecting the traces on different layers.
Fabrication Process
Chemical etching removes the unwanted copper foil from the laminated sheets, leaving behind only the designed circuit traces.
Quality Standard
Industrial compliance requires that each board undergo automated optical inspection and electrical testing to ensure there are no open or short circuits before assembly. A printed circuit board destined for high-reliability applications must also meet strict IPC specifications for plating thickness and hole quality. These stringent checks guarantee that the boards can withstand the high temperatures of assembly and the harsh operating conditions of the field.
