tag:blogger.com,1999:blog-13869903.post6171229205285066319..comments2024-03-28T04:15:44.459-05:00Comments on nanoscale views: Physics around you: the field-effect transistorDouglas Natelsonhttp://www.blogger.com/profile/13340091255404229559noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-13869903.post-43360816368446827512018-05-26T07:08:44.665-05:002018-05-26T07:08:44.665-05:00Well-timed comment about gate-all-around transisto...Well-timed comment about gate-all-around transistors Doug... Samsung just announced that these were their transistors of choice for the 3nm node. But GAA FETs also tend to deliver less current than FinFETs, so they are not an ideal replacement.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-7656664665704289972018-05-24T02:34:21.778-05:002018-05-24T02:34:21.778-05:00"... a wholesale shift to new materials ...&q..."... a wholesale shift to new materials ..." Such a shift might work, but the problems are severe.<br /><a href="https://en.wikipedia.org/wiki/Carbon_nanotube_field-effect_transistor#Disadvantages" rel="nofollow">Carbon nanotube field-effect transistors#Disadvantages, Wikipedia</a>David Brownhttps://www.blogger.com/profile/10537922851243581921noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-19876373979080430592018-05-22T14:34:48.161-05:002018-05-22T14:34:48.161-05:00Anon, I think it's Si all the way down to a fe...Anon, I think it's Si all the way down to a few nm, and then 3d integration of some form may be the way to go rather than a wholesale switch to new materials. I've always liked surround-gate designs (http://nanobio.umn.edu/Library/Hergenrother_VRG_Elsevier02.pdf and nanowire-based versions). I agree that scaling is looking very tough. Reading the Roadmap discussion of "Beyond CMOS" technologies (https://irds.ieee.org/images/files/pdf/2017/2017IRDS_BC.pdf) drives home to me how far we are from viable, mass-produceable alternatives to CMOS.<br />Douglas Natelsonhttps://www.blogger.com/profile/13340091255404229559noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-15361254852293560792018-05-22T13:10:46.115-05:002018-05-22T13:10:46.115-05:00For better or for worse, transistor scaling is slo...For better or for worse, transistor scaling is slowly coming to an end. Doug, we need smart physicists like you to find us a new device that will replace FinFETs! None of the devices currently on the "post-CMOS" roadmap are actually satisfying to circuit engineers.Anonymousnoreply@blogger.com