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Design >> Analog Design >> High-Vt
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Message started by asorab on Nov 6^th, 2016, 11:20am

Title: High-Vt
Post by asorab on Nov 6^th, 2016, 11:20am

Howdy people! How to implement High-Vt mos in TSMC 0.18um tech?

Title: Re: High-Vt
Post by kemiyun on Nov 6^th, 2016, 9:06pm

It's been a while since I've used 0.18um but there should be a separate model most likely named nmos_hvt or something, I even forgot the naming convention unfortunately. But in the process documents there is actually a list of available devices which is exactly what you should read. It will also direct you to the correct models you should use for the device you want to use high Vt device in this case.

If you mean to ask how they're implemented in layout, there's actually a layer that specifies the Vt of devices as far as I remember. Again refer to device truth table for the name of the layer.

If you're asking how the Vt is adjusted, that's not my expertise but as far as I know ion implantation is the most commonly used method, you can read more about it online.

Title: Re: High-Vt
Post by vroy_92 on Nov 7^th, 2016, 10:48am

I think it will pch_hvt_mac or nch_hvt_mac.

Title: Re: High-Vt
Post by asorab on Nov 10^th, 2016, 3:23am

Thank you for your response guys. I highly appreciate it.

Title: Re: High-Vt
Post by asorab on Nov 19^th, 2016, 9:33am

I use nmosvt2v and pmosvt2v but it shows error. It says "model name is missing..".

Title: Re: High-Vt
Post by Abdullah on Jan 1^st, 2017, 9:56am

Are you getting this error while simulating your circuit? if so, add the mos.scs to the ADE model library.

Title: Re: High-Vt
Post by A.D.J on Jan 3^rd, 2017, 1:16pm

You can check the TSMC 0.18um PDK folder. There is a doc folder including the model description file. The list of MOSFETs provided by the PDK should be written.