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Pads2007 circuit board design specifications

2013-09-22
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1. Overview The purpose of this document is to explain the process and some precautions of using PADS PCB design software for PCB design, to provide design specifications for designers in a working group, and to facilitate communication and mutual inspection between designers. 2. Design process The design process of PCB is divided into six steps: netlist input, rule setting, component layout, wiring, inspection, review, and output. 2.1 Netlist input There are two ways to input the netlist. One is to use the OLE PowerPCBConnection function of PadsLogic, select Send Netlist, and apply the OLE function to keep the schematic and PCB consistent at any time to minimize the possibility of errors. Another method is to load the netlist directly in Pads, select File->Import, and input the netlist generated by the schematic. 2.2 Rule setting If the design rules of PCB have been set in the schematic design stage, there is no need to set these rules again, because when the netlist is input, the design rules have been input into Pads with the netlist. If the design rules are modified, the schematic must be synchronized to ensure the consistency of the schematic and PCB. In addition to design rules and layer definitions, there are some rules that need to be set, such as Pad Stacks, which require modifying the size of standard vias. If the designer creates a new pad or via, be sure to add Layer 25.

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