source:Industry News release time:2023-07-27 Article author:yu Popular:pcb
PCB circuit boards have many "layers", and many beginners are easily confused by various layers of PCB when learning PCB design. Below, let the engineer summarize the definitions of various layers in PCB circuit board design for you to help you better understand and master.
1. Mechanical layer
Usually used to place indicative information about circuit boards and assembly methods, such as PCB dimensions, size markings, data, assembly instructions, and other information.
2. Occlusive layer
Draw a closed area on this layer as the effective area for wiring, which cannot be automatically arranged and routed.
3. Silk screen layer
The silk screen layer is a text layer that belongs to the top layer of a PCB and is typically used to mark the projected contour of components, their labels, nominal values or models, and various annotation characters.
4. Welding layer
The solder entry layer is the green part of the printed circuit board. After mapping the shape of the welding layer onto the board, it is not exposed on the unsintered oil resistant welding, but on the copper sheet.
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