different types of pcb boards

PCB, or printed circuit board, is one of the most important components in electronic devices.

The earliest printed circuit board used was a paper-based copper-clad printed circuit board. Since the emergence of semiconductor transistors in the 1950s, the demand for printed circuit boards has risen sharply.

In particular, the rapid development and widespread application of integrated circuits have made electronic devices smaller and smaller, and the density and difficulty of circuit wiring have become increasingly greater, which requires the continuous updating of printed circuit boards.

At present, the varieties of printed circuit boards have developed from single-sided boards to double-sided boards, multi-layer boards and flexible boards; the structure and quality have also developed to ultra-high density, miniaturization and high reliability; new design methods, design supplies and board materials, and board making processes continue to emerge.

In recent years, various computer-aided design (CAD) printed circuit board application software has been popularized and promoted in the industry.

In specialized printed circuit board manufacturers, mechanized and automated production has completely replaced manual operations.

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According to different classification methods, PCB boards can be divided into many types. The following are several common types of PCB boards:

1. Classification according to structure

Single-sided board: A single-sided board has a conductive path on only one side, and the other side is an insulating substrate. This type of PCB is easy to make and has low cost, but it cannot achieve double-sided wiring. It is commonly used in applications with low circuit requirements.

Double-sided board: Double-sided board refers to a PCB board with conductive paths on both sides. The two sides are connected through holes or pads. This type of PCB board can achieve double-sided wiring, but it is more complicated to make and the cost is relatively high. It is often used in general electronic equipment.

Multilayer board: A multilayer board is a PCB board composed of multiple layers of conductive paths and an insulating substrate. This type of PCB board can provide more wiring space and has higher reliability and stability. It is often used in high-precision electronic equipment and computers.

2. Classification by use

Signal board: A signal board refers to a PCB board whose main function is to transmit signals. This type of PCB board usually contains a large number of transmission lines, connectors, resistors and capacitors and other components to realize circuit functions.

Power board: A power board refers to a PCB board whose main function is power distribution and voltage stabilization. This type of PCB board usually contains power converters, filters, voltage regulators and other components to provide stable power to electronic equipment.

Interface board: An interface board refers to a PCB board whose main function is interface conversion and communication. This type of PCB board usually contains various interface circuits (such as USB, RS232, Ethernet, etc.) and communication chips to realize data transmission and communication between different devices.

RF board: RF board refers to a PCB board with RF signal processing as its main function. This type of PCB board usually contains components such as RF transceivers, filters, mixers, etc., which are used to realize RF signal processing in applications such as wireless communication, radar, and radio.

Sensor board: Sensor board refers to a PCB board with sensor signal processing as its main function. This type of PCB board usually contains various sensors (such as temperature sensors, pressure sensors, light sensors, etc.) and signal processing circuits for monitoring environmental parameters or realizing automatic control.

3. Classification by material

Paper board: Paper board is a PCB board with pulp as the insulating substrate. This type of PCB board has low cost, but low strength and is not suitable for high reliability applications. It is often used in some low-cost simple electronic products.

Fiberglass board: Fiberglass board is a PCB board with fiberglass as the insulating substrate. This type of PCB board has high strength and high temperature resistance, but high cost. It is often used in electronic products that require high reliability.

Epoxy board: Epoxy board is a PCB board with epoxy resin as insulating substrate. This PCB board has high strength and heat resistance, but the cost is relatively high. It is often used in high-reliability electronic products.

Polyimide board: Polyimide board is a PCB board with polyimide as insulating substrate. This PCB board has extremely high heat resistance and reliability, but the cost is very high. It is often used in electronic products with high temperature and high reliability requirements, such as aerospace and military fields.

4. Classification according to production process

Organic board: Organic board refers to a PCB board made of organic materials. The production process of this PCB board is relatively simple and the cost is low, but the strength is low and the high temperature resistance is poor. It is often used in some low-cost electronic products.

Inorganic board: Inorganic board refers to a PCB board made of inorganic materials. The production process of inorganic board is relatively complex and the cost is high, but it has high strength and high temperature resistance. It is often used in high-reliability electronic products, such as aerospace and military fields.

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In summary, it can be divided into many types according to different classification methods.

When selecting a PCB board, it is necessary to select the appropriate type and material based on the actual application requirements and equipment characteristics, while considering factors such as cost and manufacturability.

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