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Ib Txoj Kev Tshiab Rau Kev Txiav Txim Siab Icat Ion Ntawm Integrated Circuits

Ib Txoj Kev Tshiab Rau Kev Txiav Txim Siab Icat Ion Ntawm Integrated Circuits

Jan 15, 2018

1. LVS cov cuab yeej

LVS (Layout Versus Schematic) yog siv los xyuas qhov tseeb ntawm qhov kev teeb tsa thiab qhov schematic. LVS sib piv qhov tseeb ntawm kev teeb tsa thiab qhov kev sib txuas ntawm cov theem ntawm transistor, thiab teev cov kev sib txawv hauv daim ntawv ntawm daim ntawv tshaj qhia. Dracula ua rau cov ntaub ntawv teeb tsa los ntawm ib qho graphical system. Dracula converts GDS2 ntawv layout cov ntaub ntawv rau qhov layout net table, thiab LOGLVS (Dracula Netw cov Compiler) transforms lub rooj vag thiab transistor qib ntxhuav piav qhia los ntawm Schematic los yog CDL rau LVS lub rooj. Pib ntawm qhov tawm tswv yim thiab qhov tawm ntawm Circuit Court, kev tshawb nrhiav yog coj los nrhiav txoj kev rov rau koj. Thaum LVS pom ib qho piv txwv, nws muab lub xeev sib piv rau cov khoom sib koom ua ke thiab cov ntawm; thaum LVS pom ib qho tsis sib thooj, nws nres qhov kev tshawb nrhiav ntawm txoj kev. Tom qab LVS tshawb tag nrho cov kev taug, tag nrho cov khoom siv thiab cov hlua tau muab lub xeev sib piv. Los ntawm cov Xeev no, txoj kev sib txuam ntawm Circuit Court thiab qhov layout yuav suav tau. Lub lag luam khiav ntawm LVS yog muaj nyob rau hauv Xam 1.

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1.2 hom qauv qauv

Cov circuits muab rho tawm los ntawm qhov tsim thiab cov qauv tsim ntawm lub network yuav tsum tau hloov mus rau tib daim ntawv ntawm cov qauv rooj, thiab tib lub tsev yog txuas, thiab ob yog sib piv. Yuav kom txo tau qhov haujlwm ntawm kev sib piv, qee yam khoom siv qis rau lub rooj vag theem zuj zus txuas ntxiv, nrog rau cov qauv ntawm MOS chav tsev nyob hauv Circuit Court: INV (inverter), NOR (ob lub tswv yim "lossis tsis"), NPE (ob qhov input NAND gate , PUPI (sab hauv qab), SUP (Series rub) (ntawm lub hwjchim), thiab "OAI", los yog "OAI" ), SUPI (puab series rub), PDW (parallel drop-down (hauv qab)). PDWI (poob rau hauv av), SDWI (hauv), PMID series (down) parallel nruab nrab (parallel kis rooj vag), SMID (nruab nrab) series (tso tawm kis lub rooj vag)). Tus naj npawb ntawm cov qauv no tuaj yeem pom hauv tsab ntawv ceeb toom. Mismatches muaj xws li cov nqi ntawm cov rooj vag thiab cov khoom siv transistor. Cov khoom siv uas tuaj yeem tsis tuaj yeem muab sib dhos rau hauv cov koog uas tshwm sim hauv cov qauv ntawm cov chav tsev MOS cov khoom siv.


1.3 LVS yam yuam kev

Cov hom LVS yuam kev yog feem ntau muab faib ua ob hom: cov ntsiab lus inconsistent thiab cov khoom siv mismatched. Cov inconsistencies yuav muab faib ua cov ntawm inconsistencies thiab ntaus inconsistencies. Lub hlwb tsis pom zoo txhais tau hais tias muaj ib qho ntawm qhov teeb tsa thiab lub voj voog, thiab ob lub pob zeb zoo sib xws, tiam sis tsis raws nraim tib yam. Kev tsis pom zoo ntawm cov khoom txhais tau hais tias nws muaj ib qho khoom siv hauv qhov teeb tsa thiab qhov Circuit Court, ob qhov khoom siv tib yam, thiab cov caws kab txuas zoo sib xws, tiam sis tsis raws nraim tib yam. Ib qho khoom siv mismatched yog hais txog qee yam ntawm cov khoom siv hauv daim duab uas tsis muaj nyob rau hauv qhov tsim, lossis hauv qhov tsim, tab sis tsis nyob hauv daim duab piav qhia. Tshwj xeeb tshaj, muaj kaum tsib hom kev ua yuam kev hauv LVS:

Muaj kaum tsib hom kev ua yuam kev hauv LVS:

1. Yog tsis muaj kev ntaus rau ntawm qhov sib tw.

2. Cov khoom sib si muaj qhov sib txawv.

3. cov khoom tsis sib dhos;

4. txauv nodes muaj cov khoom siv rov ua dua tshiab.

5. piv cov nodes muaj cov khoom siv kab nrig redundant.

6. cov cim nodes muaj cov kev ua tsis tau zoo thiab cov duab kos rau ntawm daim duab.

7. lwm yam khoom siv tsis tiav;

8. lwm daim duab sib luag;

9. Hom khoom (hom N thiab P, polycrystal los yog diffusion tsis kam) tsis sib npaug;

10. Qhov loj ntawm lub cuab yeej (W lossis L) tsis phim.

11. Kev hloov thuam MOS;

12. kev sib txuas tsis sib haum yog tsis sib npaug;

13. Lub zog txuas ntawm lub cuab yeej tsis sib npaug (qhov teeb meem ntawm cov fais fab);

14. simplifying ntau thiab txuas MOS mus rau ib qho MOS yog ib qho kev ua yuam kev (muaj feem xyuam rau K xaiv hauv LVSCHK);

15. yuam kev thaum liming redundant khoom (muaj feem xyuam rau qhov F xaiv ntawm qhov kev hais kom ua hauv LVSCHK).


Ib qho yuam kev LVS hais txog ib qho khoom siv, ib qho ntawm ib qho, thiab ib qho kev sib txuam ntawm ib qho (ib qho kev sib tsig sab nraud). Ib qho kev ua haujlwm uas tsis raws cai (ntau yam khoom siv thiab cov ntshav nyob hauv lub cheebtsam) feem ntau yog ib qho uas tsis sib luag nrog ntau lub pobtawb lossis cov khoom siv, thiab tsis yog txhua tus lawv tsis phim. Tag nrho cov khoom siv thiab cov ntshav nrog ib lub mismatch yog siv raws li tus naj npawb ntawm cov teeb meem, thiab txhua qhov ntawm kev tsis raws cai tau muab teev tseg rau hauv LVS daim ntawv qhia cov ntaub ntawv. Cov lus ceeb toom txawv txawv ntawm tib neeg txoj kev to taub. Piv txwv, ob lub teeb liab tau hloov mus rau qhov chaw. Raws li qhov kev txiav txim zoo, lawv tsuas yog suav tias yog yuam kev, tab sis muaj ob qho uas tsis raug nyob rau hauv daim ntawv ceeb toom LVS.