PCB (Printed Circuit Board), also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. Because it is made by electronic printing, it is called a “printing” circuit board.
After the electronic equipment adopts the printed board, due to the consistency of the same printed board, the manual wiring is avoided, and the electronic components can be automatically inserted or mounted, automatically soldered, and automatically detected to ensure the quality of the electronic equipment. Increase labor productivity, reduce costs, and facilitate maintenance.
Printed boards have evolved from single layers to double-sided, multi-layer and flexible, and still maintain their respective trends. Due to the continuous development of high precision, high density and high reliability, the volume is reduced, the cost is reduced, and the performance is improved, so that the printed board still maintains a strong vitality in the development of electronic equipment in the future.
According to the number of layers, the circuit board is divided into three major categories: single panel, double panel, and multi-layer circuit board.
The first is a single panel. On the most basic PCB, the parts are concentrated on one side and the wires are concentrated on the other side. Because the wire only appears on one side, it is called a single-sided circuit board.
Single panels are usually simple to make and low in cost, but the disadvantage is that they cannot be applied to products that are too complicated.
The double panel is an extension of the single panel. When the single layer wiring cannot meet the needs of the electronic product, the double panel is used.
Both sides have copper-clad traces, and the vias can be used to turn on the lines between the two layers to form the desired network connection.
A multi-layer board refers to a printed board having three or more layers of a conductive pattern layer and an insulating material interposed therebetween, and the conductive patterns therebetween are interconnected as required.
Multi-layer circuit boards are the product of the development of electronic information technology in the direction of high speed, multi-function, large capacity, small volume, thinning and light weight.
According to the characteristics, the circuit board is divided into a soft board (FPC), a hard board (PCB), and a soft and hard board (FPCB).
FR-1: Flame retardant copper clad phenolic paper laminate. IPC4101 detailed specification number 02; Tg N/A;
FR-4: 1) Flame-retardant copper-clad epoxy E-glass cloth laminate and its bonding sheet material. IPC4101 detailed specification number 21; Tg ≥ 100 ° C;
2) Flame-retardant copper-clad modified or unmodified epoxy E fiberglass cloth laminate and its bonding sheet material. IPC4101 detailed specification number 24; Tg 150 ° C ~ 200 ° C;
3) Flame-retardant copper-clad epoxy/PPO glass cloth laminate and its bonding sheet material. IPC4101 detailed specification number 25; Tg 150 ° C ~ 200 ° C;
4) Flame-retardant copper-clad modified or unmodified epoxy glass cloth laminate and its bonding sheet material. IPC4101 detailed specification number 26; Tg 170 ° C ~ 220 ° C;
5) Flame-retardant copper-clad epoxy E-glass cloth laminate (for catalytic addition). IPC4101 detailed specification number 82; Tg N/A;
YMS is a High-Tech PCB bare board service enterprise worldwide. Through more than 10 years’ effort, YMS has developed into a High tech enterprise. Sales revenue of YMS in 2018 exceeded $59 million.
With a facility area of more than 10,000 square meters, it is able to produce over 300,000 square meters per year , whose PCB products range from 2 to 20 layers, including HDI, Heavy Copper, Rigid-Flex, and Embedded Capacitance etc.
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Post time: Aug-07-2019