US Patent 10158197 Flippable electrical connector

A receptacle connector for use with a plug, includes an insulative housing defining a base and a mating tongue extending, with a widen and thicken step portion defined at a root region of the mating tongue; a plurality of contacts disposed in the housing with contacting sections exposed upon the first and second surfaces of the mating tongue and categorized with signal contacts, power contacts and grounding contacts. Each of first and second surfaces of the step portion is fitly surrounded with a metallic plate, the metallic plate mechanically and electrically connects to the corresponding grounding contact.