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Magic Mailing List |
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From: erik peterson (erik AT yanntek DOT com) Date: Fri Oct 26 2001 - 12:02:58 EDT
if you are making a device that the techfile doesnt expect but that device is still a legal structure (doesnt break any foundry DRC's), you might have to make changes to the techfile. what techfile are you using? do you have the DRC rules for the foundry you will use? if there is no NDA problems i can help you hack out an "exception" to the techfile so you can draw this thing out :) -erik Eric L T Tan wrote: > > Hi magic folks, > > This is something unrelated to magic itself, but > I don't know where else to ask, and I believe some > of you have done this kind of thing in magic. So if > you could give me some directions I would appreciate > it very very much. > > I want to draw Fowler-Nordheim tunneling cahnnel > in magic. According to Chris Diorio's paper he uses > n+ diffusion in n-well, thus creating a thin-OX under > poly. But whenever I want to draw poly over nsd > (n-substrate-ndiff), the nsd yields and no active > (CAA) region will be under the poly. I wonder how > do you overcome this problem? The cif reads, > > L CWN; > B 108 104 102 120; > L CSN; > B 80 72 104 124; > L CAA; > B 64 24 104 140; > B 52 12 110 122; > B 64 20 104 106; > L CPG; > B 52 12 58 122; > > If you see, CAA is divided into 3 parts, no CAA > under poly. > > Later I tried different ways, and one of them seems > to work, but I'm not sure. I first draw nwell, and > I draw nselect inside the well, and paint fet inside > the nselect, and get rid of poly of the fet by ctrl-D > over other poly, and I put generic contact, and route > metal1 to the contact, and then draw thin poly from > outside to overlap the fet a little bit. Now the cif > reads, > > L CWN; > B 128 112 112 120; > L CSN; > B 96 80 112 120; > L CAA; > B 64 48 112 120; > L CPG; > B 60 12 62 122; > L CCC; > B 8 8 128 120; > L CM1; > B 96 24 164 120; > > I am not sure if this is going to work. Any comment > or suggestion will help! > > Thanks!!
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