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Cadence Paper: Automating Inter-Layer In-Design Checks in Rigid-Flex PCBs
May 25, 2016 | Ed Hickey, Cadence Design SystemsEstimated reading time: 10 minutes
Rigid-flex designs are unique when transferring the design data to the fabrication process. The various build-up of materials that make up the final product must be clearly defined. Identification of the various materials and correct order that define the layer structure must also be identified for each zone through proper documentation, or through intelligent manufacturing data formats (see Table 1). Failure to provide proper detailed information may result in costly delays or incorrect results of a final product. Communication with the fabricators to identify their requirements is key to a problem-free process.
Design houses and fabricators agree on a stack-up for a design that has impedance control or flex/rigid-flex designs because of the complexities involved. Traditionally, design houses and their fabrication partners use spreadsheets, presentations, and other such tools to communicate build intent. These methods are both time-consuming and error-prone. To avoid such problems and save time, advanced PCB designers now use IPC-2581 to exchange stack-up data electronically. IPC-2581 is an open, intelligent, neutral design data exchange format that is supported by over 85 PCB design and supply-chain companies worldwide. IPC-2581 revision B now supports bi-directional exchange of stack-up data to eliminate discovery of problems late in the design hand-off cycle.
Summary
Rigid-flex PCBs provide a reliable and flexible option for meeting the small form factor and low weight requirements of a variety of applications. However, as flexible technology has evolved, new design challenges have cropped up. PCB design technology that automates the detection of errors as they are made through in-design inter-layer checks in rigid-flex PCBs can help meet these challenges, helping you deliver a quality product within the desirable time-to-market window.
Ed Hickey is product engineering director of Cadence Design Systems.
About Cadence Design Systems
Cadence Design Systems enables global electronic design innovation and plays an essential role in the creation of today’s electronics. Customers use Cadence software, hardware, IP, and expertise to design and verify today’s mobile, cloud and connectivity applications. Visit www.cadence.com.
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