pads电路板设计流程（Pads circuit board design flow）.docVIP

pads电路板设计流程（Pads circuit board design flow） PADS circuit board design process The design flow of PCB table for network input, set of rules, layout, wiring, inspection, review, the output of the six steps. Table 1 net input There are two ways of network input, one is to use the PowerLogic OLE PADS Connection Send Netlist, application function, OLE function, can keep the principle diagram and PCB diagram, to minimize the possibility of error. Another method is to directly load in PADS network, File-Import, the principle diagram generation netlist input in. 2 set of rules If you have the PCB design rules set it in principle design stage, will not have to set the rules, because the input netlist, design rules with netlist input into PADS. If you modify the design rules, must ensure the synchronization principle diagram, principle diagram and PCB agreement. In addition to the design rules and layer definition, there are some rules need to be set up, such as Pad Stacks, need to change the size of the hole. If the designer built a pad or a hole, be sure to add Layer 25. Be careful： PCB design rules, layer definition, hole setting, CAM output settings have made the default boot file name for the Default.stp, after the netlist input in, in accordance with the actual situation of the design, the power supply network and distribution for power and ground planes, and other advanced rules. In all the rules set up later, in PowerLogic, using the OLE PADS Connection Rules From PCB function, update the principle diagram of the rules, to ensure the principle diagram and PCB diagram of consistent rules. 3 component layout After the network input, zero all components will be placed in the work area, overlap together, the next step is to put these components separately, according to some rules neatly, namely the component layout. PADS provides two methods, manual and automatic layout layout. 3.1 manual layout 1. tools for PCB structure size of draw plate edge (Board Outline). 2. compon