This application note discusses a Maxim packaging solution called SFN (Single (line of contacts), Flat, No leads), which is designed for electro-mechanical contact solutions. The note discusses traditional packaging solutions for an electro-mechanical contact, and introduces the SFN alternative. The SFN mechanical specification is described. The note also recommends ways to attach the SFN to an accessory or consumable, in addition to recommending contacts for the electro-mechanical interface. A reliability analysis of the package is provided.