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What is PCB and what is the history and development trend of PCB design?

Time:2021-07-15 15:52

PCB (Printed Circuit Board) printed circuit board, also known as printed circuit board. It is the carrier of electronic components in electronic products, but also the provider of electronic components circuit connection. The traditional circuit board using printed etching resist method to make the circuit lines and graphics, so it is called printed circuit board or printed circuit board.
History of PCB.
In 1925, Charles Ducas in the United States printed out the circuit pattern on an insulated substrate, and then plated to create the wires. This is the opening of the modern PCB technology a symbol.
In 1953, epoxy resin began to be used to manufacture substrates.
In 1953, Motorlora developed a double-sided plated through-hole method, later applied to multilayer circuit boards.
In 1960, V. Dahlgreen made flexible printed circuit boards by laminating a metal foil film with printed circuits in plastic.
In 1961, Hazeltime Coprporation in the U.S. made multilayer boards by referring to the plated through-hole method.
In 1995, Toshiba developed the B21T incremental printed circuit board.
At the end of the 20th century, Rigid-flex, buried resistance, buried capacitance, metal substrates and other new technologies continue to emerge, PCB is not only to complete the interconnection function of the carrier, and as all the coy sub-products kind of an extremely important part in today's electronic products play a pivotal role.
PCB design trends and countermeasures
The electronics industry, driven by Moore's Law, products are becoming more and more powerful and integrated, the signal rate is getting faster and faster, and the product development cycle is getting shorter and shorter. As electronic products continue to miniaturize, precision, high-speed, PCB design not only to complete the line connection of the components, but also to consider the challenges posed by high-speed, high-density PCB design will show the following trends.
PCB engineers need to use first-class EDA tools and software; the pursuit of a successful board, taking into account all factors, and strive for a successful; multiple parallel design, division of labor; module reuse, pay attention to technical precipitation.
PCB engineers need to master certain high-speed PCB design skills.
3. single-board density, PCB engineers must keep up with the industry's frontier, to understand the new materials, new processes, the use of first-class EDA software that can support high-density PCB design.
4. Gate circuit operating voltage is getting lower. Engineers need to sort out the power supply channel, not only to meet the need for current-carrying capacity, but also by adding appropriate de-coupling capacitors, if necessary, the use of power ground plane adjacent, tight coupling to reduce the power ground plane impedance, reduce power ground noise.
5. SI, PI, EMI issues tend to be complex. Engineers need to have high-speed PCB SI, PI, EMI design basic skills.
6. New processes, the use of new materials, buried resistance, buried capacity will be promoted.

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