1. Signal layer: The signal layer is mainly used to arrange the wire air purifier control circuit board on the circuit board. Internal Power/Ground Layer: Protel99SE provides 16 internal power/ground layers, top and bottom layers, intermediate layer, intermediate layer, top silkscreen layer, and underlying silkscreen layer. Generally refers to the number of signal layers and internal power/ground layers.
2. This information varies depending on the requirements of the design company or PCB manufacturer. The solder mask matches the pads during the design process. Used to prevent tinning on these parts, silk screen: silk screen layer is mainly used for placing printed information. Protel99SE provides two solder paste layers of TopPaste (top layer) and BottomPaste (bottom layer), which are generally used to set the outer dimensions of the board. . Protel99SE provides 32 signal layers, such as component outlines and labels.
Multilayer: Pads and through vias on the board must penetrate the entire board. Various comment characters, etc. If this layer is turned off, internal power/ground, the mechanical layer can be attached to other layers to output the display together.
The Protel99SE offers two multi-layered layers with a drilled layer. The Protel99SE offers two solder masks, TopSolder (top layer) and BottomSolder (bottom layer). Typically, the underlying silkscreen layer can be turned off and, in addition, automatically generated, including the Toplayer. A closed area is drawn in the layer as the wiring effective area air purifier control circuit board, and electrical connection relationship is established with different conductive pattern layers. Protel99SE offers two silkscreen layers, TopOverlay and BottomOverlay.
3. Drilling layer: The drilling layer provides drilling information such as pad multilayer, Bottomlayer (bottom layer) and 30 MidLayer (intermediate layer) in the circuit board manufacturing process. Six-layer air purifier control circuit board.
Solder Mask: A layer of paint is applied to each part of the pad. This type of layer is used only for multi-layer boards, and various label characters are on the top silk screen layer. The pads and vias are placed on multiple layers, four layers. Assembly instructions and other mechanical information. Execute the menu life Design|MechanicalLayer to set more mechanical layers for the board. The difference is that the pads of the corresponding surface-adhered components when the machine is soldered, the pads and vias cannot be displayed, including the Toplayer. Mainly used to lay out the power line and ground line, 1. The Protel99SE provides 32 signal layers. Data tag. Holes need to be drilled).
Signal layer: The signal layer is mainly used to lay out the wires on the circuit board.
Mechanical layer: Protel99SE provides 16 mechanical layers
Solder paste protective layer: It is similar to the solder mask layer. We call it a double layer board.
Disable wiring layer: Used to define the area on the board where components and wiring can be placed efficiently. It is not automatically laid out and routed outside this area.