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Design for Manufacturability in PCB Layout


									?PCB layout plays a core role in the manufacturing of a printed circuit board. The
layout process produces a graphical representation of the circuitry that is necessary to
manufacture a PCB. PCB design is a detailed description and graphical representation
of the circuit. Most of the circuit boards manufactured today are assembled and tested
by automated machines, driven in part by the data provided by the PCB files. In this
light, the need for PCB layout becomes evident.

PCB Layout with Computer Aided Design Software

With the development of CAD tools by several different companies, it is now
common for the PCB layout to be prepared by using CAD software tools. These
programs are computer-based applications that offer tools and techniques to
effectively and efficiently design a PCB and generate the necessary files to
manufacture the board.

Essential Considerations for PCB Design

Design for manufacturability has becoming an increasingly necessary part of the PCB
design process. Designers must take into consideration the manufacturing process
when designing a board. This requires designers to understand the manufacturing
process and how layout affects that process.

The PCB design should consider current flow, size of the circuit, and electromagnetic
interference to specify track width. Also, impedance, signal tracks and susceptibility
needs to be measured for a particular circuit in order to prepare the precise PCB
design. The positioning of components, their alignment and relationship with each
other, also has to be thoroughly described in the layout.

Through CAD software, it is possible to prepare a multi-layer design. To maintain
visibility, the actual display of different layers is done in separate colors while they
are merged into an overlay image.

911EDA, Inc. provides electronic engineering and PCB layout services.

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