What Are the Different Types of Printed Circuit Board Equipment?

PCB (Printed Circuit Board), Chinese name is printed circuit board, also known as printed circuit board. It is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. Because it is made using electronic printing, it is called a "printed" circuit board. ^[1]

PCB (printed circuit board) is a printed circuit board, which is one of the important components of the electronics industry. Almost every electronic device, from electronic watches,

The creator of the PCB was the Austrian Paul Eisler. In 1936, he first used printed circuit boards in radios. In 1943, Americans applied the technology to military radios. In 1948, the United States officially recognized the invention as a commercial application. Since the mid 1950s, printed circuit boards have only been widely used. Printed circuit boards are found in almost every electronic device. If there are electronic parts in a certain device, they are also mounted on PCBs of different sizes. The main function of the PCB is to make various electronic components form a predetermined circuit connection, and to play the role of relay transmission. It is the key electronic interconnect of electronic products, and is known as the "mother of electronic products". ^[3]

The reason why PCB can be used more and more widely is because it has many unique advantages, which are as follows: ^[2]

The PCB has the following functions in electronic equipment. ^[4]

Classification according to the number of circuit layers:

Divided into rigid circuit boards and

To get the best performance from electronic circuits, the layout of the components and the layout of the wires are important. In order to design good quality, low cost PCB. The following general principles should be followed: ^[7]

The providers of commonly used PCB design software are Altium, Cadence, Mentor, etc. Among them, Altium (formerly known as Protel International) has successively launched Protel 99 SE, Pi'otel DXP, AltiumDesigner, etc., which are widely used in China. At present, Altium Designer has new versions released every year. For PCB design software, learn to use one, and the rest It is easier to learn, because the functions of this kind of software are very close. ^[8]

Classified according to the upstream and downstream of the industrial chain, it can be divided into raw materials, copper clad laminates, printed circuit boards, and electronic product applications. The relationship is as follows: ^[5]

Fiberglass cloth: Fiberglass cloth is one of the raw materials of copper clad laminates, which is woven from glass fiber yarns, which accounts for about 40% (thick) or 25% (thin) of the cost of copper clad laminates. Glass fiber yarns are calcined in a kiln to form a liquid from raw materials such as silica sand. They are drawn into extremely fine glass fibers through extremely small alloy nozzles, and then hundreds of glass fibers are entangled into glass fiber yarns. Kiln construction investment is huge, generally hundreds of millions of dollars, and once it is ignited, it must be produced 24 hours a day without interruption, and the cost of entry and exit is huge. ^[5]

Copper foil: Copper foil is the raw material that accounts for the largest proportion of the cost of copper-clad laminates, accounting for about 30% (thick) or 50% (thin) of the cost of copper-clad laminates. Therefore, the price increase of copper is the main driving force for the price of copper-clad laminates. ^[5]

Copper-clad laminate: Copper-clad laminate is the product of pressing glass fiber cloth and copper foil together with epoxy resin as a fusion agent. It is the direct raw material of printed circuit boards. It is made after etching, electroplating, and multi-layer board lamination. Into a printed circuit board. ^[5]