PCB Circuit Board Design Basic Process

One of the main purposes of circuit schematic design is to provide a network table for pcb design and to prepare the basis for PCB design.

Multilayer PCB circuit board design workflow and ordinary pcb board design research steps are basically the same situation, the difference is that students need to carry out an intermediate signal layer of the alignment and the division of the internal electrical layer, a comprehensive analysis of the design of multilayer PCB circuit boards can be divided into a number of basic has the following steps. In this paper, we will first make a brief introduction to these important steps.

PCB layout is the physical size of the PCB board, the components of the package form, the installation of components, the board layer structure that is a single-layer board, double-layer board and multilayer board planning.

Work parameter setting mainly refers to the work environment parameter setting and work layer parameter setting. Correctly and reasonably set pcb environment parameters, can bring great convenience to the design of the circuit board, improve work efficiency.

Component layout and adjustment, after the completion of the current work, you can import the network table into the PCB,multilayer pcb fabrication you can also directly import the network table in the PCB schematic. Readers who have used Protel dxp know that the system has an automatic layout function, but the effect of automatic layout is often unsatisfactory, manual layout should generally be used, especially for complex circuits and components with special requirements. Component layout and adjustment is an important task in PCB design, which directly affects the subsequent wiring and inner layer division operation.

PCB circuit board intermediate layer definition and setup, this operation focuses on the software layer stack manager to set up a specific layer structure, mainly to set up the number of intermediate signal layers and the number of internal electrical layers, the upper and lower structure.

Internal electrical layer division, usually the internal electrical layer, often need more than one system power supply through the network, often need to control the power layer within the enterprise is divided into several aspects of isolation of each other's area, and each country area connected to a specific power management network, this is the maximum degree of difference between multilayer boards and ordinary boards, but also a multilayer circuit board design is an important part. The structure of the internal electrical layer division,PCB factory often can not directly affect the alignment of the working power supply and ground grid, and at the same time due to the influence of component layout and alignment.

Wiring rules are mainly set up to set up various specifications of the circuit wiring, such as line width, parallel line spacing, line and pad safety distance, through-hole size, etc., wiring rules is an essential step, good wiring rules to ensure the safety of the circuit board wiring to meet the requirements of the manufacturing process, cost savings.

Wiring and adjustment, the system provides automatic wiring mode, but often do not meet the requirements of the designer. In practice, designers often rely on manual wiring, or some automatic wiring combined with manual interactive wiring to complete the wiring work. Layout and wiring should pay special attention to the PCB circuit board has the characteristics of the internal electrical layer. Although the layout and wiring are sequential, but in the design project will often be based on the wiring and internal electrical layer division of the need to adjust the layout of the circuit board, or according to the layout of the wiring adjustment, which is a mutual consideration, mutual adjustment process.

Other ancillary operations, such as copper plating and tear-drop repair, as well as paperwork such as report output and disk printing, can be used to check and modify PCB boards, or as a shopping list for parts.

PCB Design Process PCB

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