ASICMiner is the company that made the Block Erupter USB, Block Erupter Blades, and the Block Erupter Cubes. They are working on a 40nm chip now for their next generation miners (which I hope will finally support Stratum directly).
40nm is already on the market on AntMiners.. I thought next gen chips are 28nm ?!
BleackArrow also promise since long time ago to come with 28nm chips but all these
may come too late when the difficulty will increase too much !!
Bitmain/Bitfury 55nm are both more efficient than knc 28nm. KNC 20nm will be less efficient than Asicminer 40nm.