Issue link: https://iconnect007.uberflip.com/i/1498723
Shaughnessy: Are designers just not aware of the IPC design guidelines? Where's the disconnect? e designers talk about high speed and high frequency, so they're looking for low Dk and low Df. We have minimums or, in the case of Dk and Df, maximums for those attributes. e maximum can be 0.008 for a Dk at 10 GHz, but the designers may want less than that. ey want a better performing base material, but sometimes they cannot find a specification sheet that fits their needs. e datasheets from the vendors are where they can find the actual Dk and Df they are looking for because the datasheets from the vendors are what's "supposed" to be the typi- cal value you get when you buy the material. at's where the designers, if they use the datasheets when they are planning, can find the specification sheets that are applicable in the bottom of those datasheets. Every base material supplier puts them on there. e certificate of conformance states that the specification sheet must be referenced. at is where the designer can find those numbers if the 4101 standard is just too cum- bersome to handle. But it would be a good idea for us, as industry experts, to create a design guide that lists the different types of materials and spec sheets that fit the applica- tions, such as, "For high-speed routers, use slash sheet X or Y or Z." With a small group Tiger Team, they could come up with those pretty easily. Shaughnessy: What's the process for updating a slash sheet? It's simple and it's the same process we use to add anything to 4101. Somebody says, "I'd like to add a new slash sheet," and the chair- man puts it on the agenda. e proposer of a new data sheet comes to the 3-11A meet- ing, it is put up on the wall, discussed, and a header is proposed for it. In a follow-up meet- ing, we vote whether it should be included in