Since at least 1997, "process nodes" have been named purely on a marketing basis, and have no direct relation to the dimensions on the integrated circuit;[3] neither gate length, metal pitch or gate pitch on a "28nm" device is twenty-eight nanometers.[4][5][6][7]
GlobalFoundries offers a "28nm" foundry process called the "28SLPe" ("28nm Super Low Power") foundry process, which uses high-K metal gate technology.[9]
According to a 2016 presentation by Sophie Wilson, 28nm has the lowest cost per logic gate. Cost per gate had decreased as processes shrunk until reaching 28nm, and has slowly risen since then.[10]