PCB News - A brief analysis of the evolution of PCB boards

A brief analysis of the evolution of PCB boards

1.1 The role played by PCB

The function of the PCB is to provide a base for completing the first-level assembly of components and other necessary electronic circuit parts to form a module or finished product with a specific function. Therefore, the PCB board plays the role of integrating all the functions of the whole electronic product. Therefore, when the electronic product malfunctions, the first question is often the PCB.

1.2 The evolution of PCB

1. As early as 1903, Mr. Albert Hanson pioneered the use of the concept of "Circuit" to be applied to the telephone exchange system. It is cut into circuit conductors with metal foil and glued to paraffin paper, which is also pasted with a layer of paraffin paper, which has become the prototype of the current PCB mechanism.

2. By 1936, Dr Paul Eisner really invented the PCB manufacturing technology and issued a number of patents. Today's print-etch (photoimage transfer) technology is inherited from its invention.

1.3 PCB types and manufacturing methods are diversified in materials, levels, and manufacturing processes to suit different electronic products and their special needs. The following is a summary of some common differences, to briefly introduce the classification of PCB and its manufacturing method.

1.3.1 PCB type

A. Classified by material

A. Organic material

Phenolic resin, glass fiber/epoxy resin, Polyimide, BT/Epoxy, etc. are all included.

B. Inorganic material

Aluminum, Copper-invar-copper, ceramic, etc. all belong to it. Mainly take its heat dissipation function

B. Differentiate between soft and hard finished products

A. Rigid PCB

B. Flexible PCB

C. Rigid-Flex PCB

C. By structure

A. Single panel

B. Double panel

C. Multilayer board

D. According to the purpose: communication/expendable electronics/military/computer/semiconductor/electrical test board...

BGA. There is another kind of injection molded three-dimensional PCB, because it is less used, it is not introduced here.

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