One Size Fits All? Footprint Variations
Actively involved in the business of restoring component libraries, we came across an interesting issue regarding the reuse of footprints. One benefit of standard package types is that it allows us to reuse footprints. There are standards by JEDEC and IPC which are carefully followed, right?
In our quest to understand what specs are calling the shots, we realized that this goes way beyond industry specifications. The results were an eye-opener for us, and we want to share our findings with you.
In this video:
• Briefly define the purpose of JEDEC and IPC and why it matters in our footprints
• Discuss the evolution of the specifications that drive the footprint dimensioning
• Look at various angles of approach when creating or reusing footprints
This video discusses why blind faith in IPC standards, manufacturing datasheets, and standard footprint types is not advised. Unfortunately, this puts a lot of people in a "damned if you do, damned if you don't" situation. If footprints are of great concern, one recommendation is to draw the footprint based on the component itself. This could be done either through 3D rendering, which should be based on the maximum material, or by measuring the physical component itself. This is what is used at the assembly plant JLCPCB. Robert Feranec has a video ( • Visiting a Big Factory in China - How they... ) that shows this process. Granted, this would be for a huge company or a company concerned about reliability, but similar concepts can be employed at smaller companies.
Would you like to see other webinar recordings or videos from us? Check out https://ninedotconnects.com/knowledge or reach out to us at [email protected] or 214-699-7719. Thanks!