Single-sided PCB circuit board is a kind of printed circuit board. Only one side of the PCB board has a circuit. And the other side  covered with substrate or direct insulating ink. It can have holes or no holes. If there is no circuit and the whole board  exposed to strong light. Only the wired side of the cross section contains copper foil.Its meaning is: with insulation material as the substrate processing into a certain size of the board. The board with at least one conductive pattern and the designed hole to realize the electrical connection between electronic components  called a single-sided PCB circuit board.


1.Origin of single-sided PCB circuit board


The inventor of the single-sided PCB was Austrian Paul Leisler.He used the printed circuit board in a radio set in 1936. In 1943, the Americans made extensive use of the technology in military radios. In 1948, the United States officially approved the invention for commercial use. Single-sided PCB circuit board technology has only been widely adopted since the mid-1950s.

Before the emergence of single-sided PCB circuit boards, the interconnection between electronic components was achieved by direct connection of wires. For now, circuit panels exist only as effective experimental tools. Printed circuit boards have dominated the electronics industry.

single-sided PCB

2.Overview of single-sided PCB circuit board

Generally speaking, single-sided PCB circuit board is copper plate after etching treatment. The copper plate  composed of plate base and copper foil, and the plate base  usually made of glass fiber and other insulating materials. It  covered with a layer of copper foil (usually oxygen free copper). After etching copper foil, there is a section of curved copper foil left. These copper foil  called wire. These wires function as THE wires in the circuit SCHEMATIC, and they are responsible for connecting the pins of the components together.

The copper foil has holes drilled into it for mounting electronic components, called boreholes. The copper foil used for welding with the pin of the element is called a Pad. Obviously, single-sided PCB circuit board can provide mechanical support for fixed and assembled electronic components, and can realize electrical connection or insulation between electronic components. In addition, we can also see many single PCB printed on the number of components and some graphics, which provides a convenient component installation, inspection, maintenance.

3.Type of material used for single-sided PCB circuit board

(1) phenolic paper substrate

Phenolic paper substrate, commonly known as: cardboard, flame retardant board, red copper clad plate, 94V0. The most commonly used models of phenolic paper-based copper-clad panels are FR-1(flame retardant) and XPC(non-flame retardant). Single-sided copper-clad plates can  easily judge from the color of the characters behind the plate. Generally, the red letters are FR-1(flame retardant type) and the blue letters are XPC(non-flame retardant type). This type of board is the ch

(2) epoxy glass fiber cloth substrate

Epoxy glass fiber cloth substrate is a kind of substrate with epoxy resin as binder and electronic grade glass fiber cloth as reinforcement material. Its bond sheet and inner core thin copper clad plate, is an important substrate for the production of multilayer printed circuit board. The operating temperature is high, and the performance  not affected by the environment. In the processing technology, compared with other resin fiberglass substrate has a great advantage. This kind of product  mainly used for double-sided PCB, also compared with phenolic paper substrate price about twice, commonly used thickness of 1.5mm.

(3) composite substrate

Composite substrate mainly refers to CIM-1 and CIM-3 composite substrate copper clad plate. The copper-clad plate made of wood pulp fiber paper or cotton pulp fiber paper as core reinforcement material and glass fiber cloth as surface reinforcement material, both of which dipped in flame retardant epoxy resin,  called CIM-1. The copper-clad plate made of fiberglass paper as core material and fiberglass cloth as surface material  immersed in flame retardant epoxy resin, which  called CIM-3. These two types of copper-clad plates are the most common composite base copper-clad plates. This type of sheet is cheaper than FR4 type.


4.What’s the difference between a single panel and a double panel

  1. Material

Single panel single side copper foil, is more familiar with the circuit board. And the double panel, both sides have copper foil, can  wire, it  used to pass through the hole connection, both in the price is also different.

  1. Process

Usually the solder joints of a single panel are basically on the same side, and the other side is the plug element. Some devices have SMD elements in the copper foil. With dual panels, both sides can  weld so that both plug-in and SMD elements are available.

  1. PCB circuit board

The single-sided board  mainly composed of metal lines to which the supply parts  connected mounted on an insulating substrate, which is the supporting carrier for the installation of the part. The double panel is when the single side circuit is insufficient to supply electronic parts to meet the demand, the circuit can  install on both sides of the substrate, and the through circuit  arranged on the substrate to connect the circuit on both sides of the board.

5.What are the features of a single panel

A single panel  often appear in previous life, with its parts stacked on one side and wires stacked on the other. It has a lot of strict restrictions in the design of the circuit, because there is only one side, the wiring can not  cross, so only around their own path, in the early circuit is more common. Today, we are using more dual panels, which is more convenient and intelligent.