What is a Printed Circuit Board (PCB)?
A Printed Circuit board also known as a PCB is a board that connects electronic components. A PCB uses conductive tracks, pads and other featured etched from copper sheets which are laminated onto a non-conductive substrate.
PCB’s can be single-sided (one copper layer), double-sided (two copper layers on both sides of one substrate layer) or multi-layer (outer and inner layers of copper, separated by non-conductive substrate although with layers of substrate).
The next layer is a thin copper foil, it is laminated into the board with head and adhesive. If the board is a double-sided PCB then copper is generally applied to both of the side of the substrate.
At Exception PCB we manufacture PCB’s from one layer up to 32 layers.
The layer on top of the copper foil is known as the solder mask layer. This is what gives the PCB its typical green colour. It’s applied onto the copper layer to insulate the copper traces. It nullifies the chance of accidental contact with other metal, solder or conductive materials within the finished product.
A white silkscreen layer is applied on top of the solder mask layer. This process adds Component references to define locations of component placement.
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