There are many types of PCBs, so there are also a variety of classification methods in the PCB industry, and the common PCB classifications are as follows, I hope it will help you.
Personally, I think that for the classification of PCB, we should not worry too much, just understand it generally, because with the development of PCB technology, new PCB types or names continue to appear.
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1.PCBs are classified according to the number of layers.
Single Side Board: The PCB has only 1 layer of wiring.
Double Sides Board: The PCB has 2 layers of wiring, and the two layers can be connected through holes, and the holes are mechanical holes.
Multy Layers Board Multi-Layer Board: PCB has more than 2 layers of circuit design, and the layers are connected through mechanical holes or laser holes.
The difference between HDI (High Density Inter-Connection) and multilayer boards: HDI must be multilayer boards, but multilayer boards are not necessarily HDI boards.
HDI board characteristics (supplementary): It is a circuit board with relatively high circuit distribution density, which mainly adopts microblind buried hole technology and laser laser (laser), electroplating hole filling, lamination method and other manufacturing processes.
2.PCBs are classified according to their mechanical properties.
Rigid board or rigid board (or R-PCB).
Flex Board (or FPC: Flexible Printed Circuit).
Rigid-flex board
3.PCBs are classified according to the type of substrate or coreboard.
Paper-based circuit boards.
Ceramic-based circuit boards.
Metal-based circuit boards.
Glass-based circuit boards: e.g. FR4 epoxy substrates, which are widely used.
4.PCBs are classified according to their use.
Civil printed circuit boards (consumer): printed circuit boards used in toys, cameras, televisions, audio equipment, mobile phones, etc.
Industrial printed circuit boards (equipment): printed circuit boards used in security, automobiles, computers, communication machines, instrumentation, etc.
Military printed circuit boards: printed circuit boards used in aerospace and radar, etc.
5.As PCBs continue to evolve, some new names or categories have emerged for reference.
High Layer Count: Generally mechanical through-hole boards, with 8 layers or more.
Back board: Generally a server board, the board size is relatively large, and there may be plug-in holes, press fit holes, depth holes, etc.
Substrate: Semiconductor chip packaging.
Substrate Like PCB (SLP): It is currently mainly used in high-end smartphone products.