Different Types of Printed Circuit Boards

Jan 18, 2022


Single-sided PCB board

The single-sided printed circuit board includes only one layer of substrate or substrate. One end of the substrate is coated with a thin layer of metal, usually copper, because it is a good electrical conductor. Typically, a protective solder mask is placed on the peaks of the copper layer, and a final silkscreen coating can be applied to the top to mark the components of the board.

The PCB consists of a single various circuits and electronic components. This type of module is best for light-hearted electronics, and beginners usually start by designing and building this type of board. Compared to other types of boards, the cost of these boards is lower than mass production. But despite their low cost, they are rarely used due to their own design constraints.

Double-sided PCB board

This type of PCB is more familiar than single-sided. Both sides of the base plate of the board include metal conductive layers, and components are attached to both sides. Holes in the PCB allow circuits on a single circuit to connect to circuits on the other side.

These boards are used to connect circuits on each side by one of two techniques: through-hole and surface mount technology. Through-hole technology can take small wires (through holes) called leads and solder each end to the appropriate component.

Unlike through-hole technology, surface mount technology does not use wires. In this place, many small pencils are soldered directly to the board. Surface mount technology allows many circuits to be done in a smaller space on the board, which means the board can perform more functions, often with less weight and faster speed than through-hole boards.

Multilayer PCB

These PCBs further expand the density and complexity of PCB designs by adding additional layers beyond the top and bottom layers seen in double-sided configurations. With the accessibility of multiple layers in a multilayer printed circuit board configuration, multilayer PCBs enable designers to produce very thick and highly composite designs.

The extra layers used in this design are the power planes, which both provide power supply to the circuit and also reduce the level of electromagnetic interference emitted by the design. Lower EMI levels are achieved by placing the signal level in the middle of the power plane.

Rigid PCB

In addition to having different layers and sides, printed circuit boards may also change inflexibility. Most customers usually consider inflexible PCBs when imaging circuit boards. Rigid printed circuit boards use a solid rigid substrate, such as fiberglass, to keep the board from twisting. A motherboard inside a computer tower is the best example of an inflexible PCB.

Flexible PCB

Typically, the substrate in a flexible board is a flexible plastic. This base material allows the board to fit into a form where the unbent board cannot turn or move during use without affecting the circuitry on the printed circuit board. While flex boards tend to contemplate and create more functionality than rigid PCBs, they have many advantages. For example, they can restore heavy or bulky wiring on advanced gear like satellites, where weight and space matter. Flex boards are also available in three formats, i.e. single-sided, double-sided or multi-layer formats.

Rigid-flex brings together the technologies of flexible and rigid circuit boards. A simple rigid-flex board consists of a rigid circuit board connected to a flexible circuit board. These boards can be more complex if required by design requirements.

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