Tsev > Xov xwm > Ntsiab lus

Txoj Kev Tsim ntawm IC Layout Tsim Thiab Cov Piv Txwv

Jan 11, 2018

1. Tsim qauv tsim

Qhov tsim qauv tsim tawm tau muab cais tawm ntawm cov ces kaum sib txawv. Yog hais tias qhov degree ntawm automation muab faib raws li qhov tsim cov qauv, qhov tsim qauv tsim yuav muab faib ua 2 pawg: phau ntawv tsim thiab kev tsim qauv siv. Tus qauv tsim yuav muab faib ua 2 pawg, tag nrho cov kev cai thiab semi customizing, yog hais tias lawv raug faib raws li qhov kev txwv ntawm kev teeb tsa thiab qhov chaw nyob thiab qhov kev txwv ntawm cov qauv npaj. Rau tag nrho cov kev cai tsim qauv, muaj 3 yam ntawm CAD cov cuab yeej uas pab rau nws: kev sib tham sib nraaj graphic duab ntawm cov duab, cim txoj kev thiab tsis siv lub teeb nris ntawm block blocks. Rau qhov piv txwv ntawm qhov tsim teeb tsa ntawm tus qauv siv nyiaj siv ua haujlwm, tus Tanner lag luam L-Hlis software siv. Qhov no yog kev sib txuas lus graphical dav siv rau microcomputers. Tus tsim qauv siv kev sib tham nraaj duab los tso rau hauv lub computer thiab hloov cov duab sketches uas yog tsim los ntawm tus qauv. Yog li no, hom no kuj tau cais ua tus qauv tsim qauv. Vim hais tias phau ntawv tsim txoj kev inevitably tsim tawm tsis to taub, nws yog ib qhov tsim nyog los xyuas qhov teeb tsa tom qab qhov teeb tsa yog kho. Cov ntawv pov thawj tsim muaj cov cai tswj xyuas DRC, hluav taws xob tswj kos ERC, layout parameter extraction LPE, layout thiab schematic contrast check LVS. Ntawm cov ntaub ntawv, cov validations yuav ua tau los ntawm L-Kho.


2. tsim txoj cai

Circuit designs feem ntau xav kom Circuit Court yuav tsum tau tsim raws li compact li sai tau. Tab sis cov tshuab hluav taws xob tshuab xav ua ib theem siab yield. Kev tsim cov cai yog cov lag luam uas txaus siab rau ob leeg ntawm lawv. Cov kev cai tsim tsim muaj cov ntaub ntawv pov thawj zoo. Nws teev cov yam tsawg kawg ntawm cov khoom (cov neeg sib tw, cov cheeb tsam thaj tsam, cov teeb meem, thiab lwm yam.), Qhov tsawg kawg ntawm qhov sib nrauj ntawm cov uas nyob ib sab, qhov yuav tsum tau overlaps thiab lwm qhov sib npaug nrog cov txheej txheem. Rau cov txheej txheem thaum txiav txim cov qauv kev tsim, xav txog cov teeb meem ntawm lub npog ntsej muag, ntsej muag yeeb yaj kiab, tsis siv hlua khi thiab sab nraud diffusion (lateral diffusion), qhov kev loj hlob ntawm oxide, kev pleev xim rau kev kho qhov muag thiab kev sib raug zoo nrog kev sib cog lus thiab kev tawm. Kev tsim cov qauv qhia meej txog kab zauv ntawm txhua tus duab ntawm daim duab ntawm daim npog ntsej muag ntawm lwm daim npog ntsej muag, uas muaj feem sib xws. Ntxiv nrog rau cov ntsiab lus txawv, tag nrho cov cai hais txog qhov tsawg kawg ntawm lub caij nyoog nruab nrab ntawm cov duab geometric. Tus qauv tsim yog los sawv cev rau qhov me me me me ncaj qha los ntawm cov xov tooj ntawm micrometers. Tab sis txawm hais tias qhov tsawg tshaj plaws yog tib yam, cov tuam txhab sib txawv nyias muaj nyias kev cai rau cov txheej txheem sib txawv, uas ua rau nws siv sij hawm ntau tsim los tsim thiab tawm txawv ntawm cov txheej txheem sib txawv.


Ib txoj hauv kev los daws qhov teeb meem yog los siv cov CAD siab zoo, uas tuaj yeem pab txhawb qhov kev hloov ntawm cov txheej txheem tau yooj yim. Ntxiv mus, peb tuaj yeem siv ob txoj cai tsim, cov cai tsim cov qauv kev cai uas hu ua Mead thiab Conway, tseem hu ua cov qauv tsim. Nws teev ib qho parameter rau tag nrho qhov teeb meem raws li qhov tsawg tshaj plaws ntawm tag nrho cov kev cai tsim, thiab tus naj npawb ntawm lwm cov kev cai tsim yog ib qho integer ntau ntawm no parameter. No parameter muaj qhov sib txawv micron tseem ceeb rau kev sib txawv. Li ntawd, lwm cov cai yuav raug hloov linearly. Ntawm chav kawm, lawv muaj shortcomings, thiab.

(1) kev ncaj ncees tsuas yog muaj feem xyuam rau qee qhov sib txawv (piv txwv li, nws yog linear thiab siv tau ntawm 1 ~ 2 m). Thaum qhov khwv nyob deb, kev sib raug zoo ntawm txoj cai thiab lambda tsis yog linear.

(2) conservatism.

Raws li cov cai ntawm lambda nruab nrab ntawm cov txheej txheem sib txawv, tsim cov cai tswj yuav tsum tau suav hais tias yog ua tiav rau cov txheej txheem ntawm txhua cov txheej txheem, uas yuav tsis cuam tshuam txog kev txo qis qis thiab ceev ceev. Tab sis nws tuaj yeem tau txais kev ruaj ntseg zoo dua los yog ua kom muaj kev ntseeg zoo.


3. tsim cov qauv

Qhov piv txwv no yog tsim rau kev teeb tsa ntawm ob txoj haujlwm ua haujlwm ua haujlwm raws li qhia hauv daim duab 1.

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