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Multilayer circuit board factory: design steps of multilayer circuit board

Multilayer circuit board factory: design steps of multilayer circuit board

  • Categories:Industry News
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  • Time of issue:2020-07-11 12:02
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Multilayer circuit board factory: design steps of multilayer circuit board

Information

The design process of multi-layer circuit boards is basically the same as that of conventional PCB boards. The difference lies in the need to segment the intermediate signal layer and the internal electrical layer. On the whole, the design of multilayer circuit boards is divided into the following stages:


1. The planning of multi-layer circuit boards is mainly to plan the physical size of the multi-layer circuit board, the package form of the components, the assembly method of the components, and the layer structure of the circuit board, namely single-layer, double-layer and multi-layer boards.

2. Indicate job parameter setting, job environment parameter setting and job layer parameter setting. The environmental parameters of the multilayer circuit board are set correctly and reasonably, the circuit board design is very convenient, and the work efficiency is improved.

3. Component layout and adjustment. After the current period of work is ready, the netlist can be imported into the PCB. Component layout and adjustment are relatively important tasks in the design of multilayer circuit boards, which directly affect operations such as the subsequent wiring and the division of the internal electrical layer.

4. In the software layer stack manager, focus on defining and setting the middle layer of the multilayer circuit board with a specific layer structure, mainly the number of the middle signal layer and the internal electrical layer, the upper and lower structure, etc.

5. Inner electric layer segmentation, it is usually necessary to divide the inner electric layer into multiple isolated areas, and connect each area to a specific power supply network. This is an important difference between multi-layer boards and ordinary boards, and an important part of the design of multi-layer circuit boards.

6. Wiring rules are set, mainly to set various specifications of circuit wiring, wire width, parallel wire spacing, safety spacing between wires and pads, and the size of vias, etc. Good wiring rules can ensure the safety of the circuit board wiring, and meet the requirements of the production process, saving costs.

7. Wiring and adjustment, pay special attention to the order of layout and wiring, but in the design project, the layout of the circuit board is often adjusted according to the needs of wiring and internal electrical layer division, or the wiring is adjusted according to the layout. They are mutually exclusive. The process of balance and mutual adjustment.

8. Other auxiliary operations, such as copper coating and teardrop filling, and document processing work such as report output and save printing. These files can be used to check and modify multilayer circuit boards, and can also be used as a list of purchased components .

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The evaluation system of the circuit board factory should follow the following principles

The evaluation system of the circuit board factory should follow the following principles

Establishing a good cooperative relationship with circuit board factories is conducive to cost reduction, response time reduction and the creation of new market value, etc. The core issue is how to choose the ideal circuit board factory. There are many factors involved in the evaluation of circuit board factories, and the evaluation index systems are diverse, both qualitative and quantitative, and the index weights are also different. Therefore, it is necessary to establish a universal and expandable evaluation index system for circuit board factories. , And the indicator system should follow the following principles:
The use of soft and hard circuit boards?

The use of soft and hard circuit boards?

In our daily life, circuit boards are mostly single-sided, double-sided, or multi-layer boards, rigid boards, metal-based circuit boards, aluminum, copper substrates, thermally conductive fiberboards, etc., do you know what a flexible and rigid circuit board is? Rigid-flex circuit board: refers to a special circuit board made by pressing a rigid circuit board (PCB) and a flexible circuit board (FPC). The main board materials used are rigid board FR4 and flexible board polyimide (PI). Rigid and flexible circuit boards combine the rigid characteristics of rigid circuit boards and the advantages of flexible circuit
Soft and hard circuit board production process

Soft and hard circuit board production process

The flexible and hard circuit board is the flexible circuit board and the rigid circuit board. After pressing and other processes, they are combined according to the relevant process requirements to form a circuit board with FPC characteristics and PCB characteristics. In the past, two hard boards were connected by using soft boards and connectors to connect each other. In order to improve the reliability of the connection between the rigid board and the flexible board, the flexible board is directly fabricated between two rigid boards in the printed circuit board (PCB) factory, which can avoid the subsequent connection process, whether it is a rigid board manufacturer or FPC manufacturers are now able to supply rigid-flex boards. Under the demand for light and thin end products, the

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