The product classification of PCB (printed circuit board) can be described from multiple perspectives. Here are several common classification methods:
Classification by structural form:
1. Single-sided board: There is a conductive pattern on only one side, the components are concentrated on one side, and the wires are concentrated on the other side. This type of PCB is mainly used for simple electronic devices and prototype design, with low cost but limited functions12.
2. Double-sided board: There are conductive patterns on both sides, and the electrical connection between the two layers is achieved through drilling and electroplating technology. Double-sided boards are more complex than single-sided boards, can support more components and more complex circuit designs, have moderate costs, and are suitable for many standard electronic devices1234.
3. Multi-layer board: It has four or more interconnected conductive pattern layers, separated by insulating materials. Multi-layer boards can achieve higher integration and more complex circuit designs, and have good electromagnetic compatibility performance. However, the design is more difficult and the manufacturing cost is also higher. It is usually used for high-performance and high-integration electronic devices123.
4. Flexible printed circuit board (flexible board): Made of flexible insulating substrate, it can be bent, wound, twisted and folded freely. It is suitable for applications that need to bend or fit irregular surfaces, such as smartphones, wearable devices, etc. 123.
5. Rigid-flex board: It combines the characteristics of rigid board and flexible board. It has the stability and reliability of rigid board and the flexibility of flexible board. It is suitable for special application scenarios 23.
6. HDI board: High-density interconnect board, using micro-hole technology and thin copper foil, with higher wire density and smaller size, usually used in high-end communication equipment, aerospace and medical equipment and other fields.
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