Multilayer Circuit Board Factory: Design Steps for Multilayer Circuit Board
multi-layer circuit board is basically the same as that of the conventional PCB board, except that the walking line of the intermediate signal layer and the internal electrical layer need to be segmented. On the whole, the design of multi-layer circuit board is divided into the following stages:
1 , multi-layer circuit board planning, mainly planning the physical size of multi-layer circuit board, component packaging form, component installation method, circuit board layer structure, namely single-layer, double-layer and multi-layer board.
2 , indicating job parameter settings, job environment parameter settings, and job layer parameter settings. Correctly and reasonably set the multi-layer circuit board environmental parameters, the circuit board design is very convenient, and the work efficiency is improved.
3 , component layout and adjustment, after the current work is accurate, the network table can be imported into PCB . The layout and adjustment of components is an important work in the design of multilayer circuit board , which directly affects the subsequent wiring and the division of the inner electrical layer.
4 , in the software layer stack manager, focus on defining and setting the specific layer structure of the multi-layer circuit board middle layer, mainly the number of intermediate signal layers and internal electrical layers, upper and lower structures, etc.
5 . The inner electrical layer is divided. It is usually necessary to divide the inner electrical layer into multiple isolated areas, and connect each area to a specific power network. This is an important difference between multilayer boards and ordinary boards, and it is also an important part of the design of the multilayer circuit board.
6 , wiring rule setting, mainly to set various specifications for circuit wiring, wire width, parallel line spacing, safe spacing between wires and pads, via size, etc. Good wiring rules can ensure the safety of circuit board wiring, but also meet the requirements of the production process, cost savings.
7 , wiring and adjustment, special attention should be paid to the layout and wiring although there is a sequence, but in the design project, the layout of the circuit board is often adjusted according to the needs of wiring and internal electrical layer segmentation, or the wiring is adjusted according to the layout, they are a process of mutual consideration and mutual adjustment.
8 , other auxiliary operations, such as copper application and tear drop filling, as well as document processing such as report output and storage printing, these files can be used to check and modify multi-layer circuit board , can also be used as a list of purchased components.
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