Basics and Construction
- A double-sided PCB,
also known as a double-layer or two-layer PCB, features copper layers on both sides of
the board.
- Compared to
single-sided PCBs, double-sided PCBs offer increased sophistication and adaptability,
allowing for more complex circuits and higher component density.
- The construction of a
double-sided PCB starts with a non-conductive base, typically made of
fiberglass-reinforced epoxy known as FR-4, providing insulation and mechanical support
- Thin copper layers are
laminated onto both sides of the substrate to form the conductive layers of the PCB.
- The desired circuitry
pattern, including traces, pads, and other copper features, is etched into these copper
layers to create the final PCB design.
- The copper layers on
both sides of the PCB are electrically insulated from each other to prevent short
circuits and ensure proper routing.
- Insulation is achieved
by applying a layer of non-conductive material known as solder mask or solder resist.
This protective layer covers the copper traces and pads, leaving only the required areas
exposed for soldering components
Advantages of Double-Sided PCBs
- Enhanced Complexity and Density:
Double-sided PCBs excel in enabling higher levels of circuit complexity and increased
component density compared to single-sided PCBs.
- Expanded Routing Options:
Designers benefit from the presence of copper layers on both sides of the board, which
provides them with a wider array of routing choices. This flexibility allows for the
accommodation of more components and intricate interconnections.
- Versatile Applications:
Double-sided PCBs find application across diverse industries, including industrial
machinery and consumer electronics. Their enhanced capabilities make them suitable for a
wide range of scenarios and requirements.