The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl Modeling >> Semiconductor Devices >> For MOS Cap, is the a depletion region in MOS when VFB < VGB < 0? https://designers-guide.org/forum/YaBB.pl?num=1495759649 Message started by mpig09 on May 25th, 2017, 5:47pm |
Title: For MOS Cap, is the a depletion region in MOS when VFB < VGB < 0? Post by mpig09 on May 25th, 2017, 5:47pm Hi all: Many books explain the MOS Cap value is Cox(oxide cap) serial Cdep(depletion cap) when VFB < VGB < VTH, I have a questions: is there a depletion region in MOS when VFB < VGB < 0? VFB : Flat band voltage If Yes, could you help me to understand it. Thank. mpig |
Title: Re: For MOS Cap, is the a depletion region in MOS when VFB < VGB < 0? Post by Maks on May 27th, 2017, 1:58pm There is always depletion region when Vg > VFB. At Vg> Vt though, the depletion regions is "screened" (or shielded) by the inversion layer (a thin layer of electrons in the channel, at the Si/oxide interface, supplied from N+ source/drain regions). If you want to understand what all these terms mean - depletion, deep depletion, accumulation, inversion - you can read any textbook on semiconductor device physics (for example, S.Sze book "Physics of semiconductor devices"). Max |
Title: Re: For MOS Cap, is the a depletion region in MOS when VFB < VGB < 0? Post by mpig09 on Jun 5th, 2017, 2:49am Hi Max: I have solved the problem. :) mpig |
The Designer's Guide Community Forum » Powered by YaBB 2.2.2! YaBB © 2000-2008. All Rights Reserved. |