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TFT (ib qho ntawm cov kev kawm hauv cov nyhuv ntawm transistors)

Sep 26, 2017

TFT (ib qho ntawm cov kev kawm hauv cov nyhuv ntawm transistors)


Nyias zaj duab xis transistors yog ib qho ntawm cov kev ua lag luam ntawm cov nyhuv transistors. Txoj kev yooj yim tshaj plaws los ua kom lawv muaj ntau hom paj yeeb nyob rau hauv cov substrate, xws li semiconductor active txheej, dielectric txheej thiab hlau electrode txheej. Nyias zaj duab xis transistors ua si tseem ceeb heev hauv kev ua yeeb yam ntawm cov khoom siv.

Keeb kwm thiab tam sim no editor

Tib neeg TFT kev tshawb nrhiav muaj keeb kwm ntev. Thaum ntxov xyoo 1925, Julius Edger Lilienfeld tau pib npaj qhov kev sib txuas ntawm cov tub lag luam (transcripder) (FET) ntawm txoj cai yooj yim, qhib a.1933 nyob rau hauv lub xeev cov amplifier, Lilienfeld thiab insulated rooj vag teb cov nyhuv Transistor qauv pib (tom qab ntawd hu ua MISFET.1962 ) Weimer, nrog CaS polycrystalline thin films ua los ntawm TFT; tom qab ntawd, qhov tshwm sim ntawm CdSe, InSb, TFT, Ge thiab lwm yam khoom siv los ntawm cov ntaub ntawv semiconductor. Nyob rau hauv xyoo 1960, raws li qhov kev thov ntawm tus nqi qis, daim duab loj, TFT ntawm dav sawv hauv 199, Brody et al. 136 photon technology nyob rau lub Cuaj Hli Ntuj 2006 tsim thawj lub tshuab ua matrix ua kua teeb pom kev zoo (AMLCD), thiab CdSe TFT ua tus hloov tsev. Nrog rau txoj kev loj hlob ntawm polysilicon doping, ntau lub chaw soj ntsuam tau nqa tom qab xyoo 1979 los yog AMLCD LeComber, thiab Spear Ghaith a-Si: H ua nrog rau txheej txheem, raws li qhia hauv daim duab 1 ntawm TFT ntaus ntawv. Kev tshawb fawb ntawm iav substrate. Xyoo 1980s, silicon TFT muaj ib qho tseem ceeb heev nyob rau hauv AMLCD, uas yog cov khoom ua lag luam feem ntau ntawm cov lag luam sib qhia ntawm.1986 Tsumura thiab al siv thawj polythiophene semiconductor khoom rau cov organic thin film transistor npaj (OTFT), OTFT tshuab pib tsim. Nyob rau hauv 90s, cov organic semiconductor khoom raws li cov txheej xwm active tau ua ib qho kev tshawb nrhiav tshiab. Vim hais tias nyob hauv txoj kev tsim khoom thiab cov nqi zoo, OTFT pom tias yuav muaj feem rau yav tom ntej hauv LCD, tus tsav tsheb ntawm OLED. Nyob rau hauv xyoo tas los no, qhov kev tshawb fawb ntawm OTFT tau ua qhov kev ua tau zoo hauv xyoo 1997, PHILPS tau siv ntau hom zaj duab xis stacking los ua 15 micrograms ntawm generator code (PCG); txawm thaum naam yog cuam tshuam tiag, tseem tuaj yeem ua haujlwm nyob rau hauv xyoo 1997, Lub amorphous hlau oxide thiab barium zirconate li tsib benzene organic nyias zaj duab xis transistor rooj nrog ib tug loj IBM muaj dua dielectric tas li insulating txheej qauv, tus tsav voltage ntawm tus ntaus ntawv yog txo los ntawm 4V, tus migration tus nqi ntawm 0.38cm2V-1 s-1.1999, yuav muaj nyob stably thiophene zaj duab xis nyob hauv chav tsev kub hauv cov huab cua Tswb lub Katz thiab nws pawg neeg tshawb fawb tau npaj, thiab qhov muaj ntawm tus ntaus ntawv ncav 0.1 cm2V-1 s- 1.Bell thiab tsib kuaj npaj cov organic uas siv lead ua ntawm benzene los ua ke rau ib daim duab uas muaj roj bipolar organic nyias hlauv transistor, cov cuab yeej ntawm lub tsiv ntawm lub electron thiab qhov nqi mus txog 2.7 cm2V-1 S-1 thiab 1.7 cm2V-1 s-1, qhov tseeb daim ntawv thov Circuit Court yog ib qho tseemceeb. Nyob rau hauv xyoo tas los no, nrog txoj kev tshawb ntawm lub pob tshab oxide, ZnO, ZIO thiab lwm yam ntaub ntawv semiconductor li txheej thawm ua los ntawm cov yeeb yaj kiab nyias transistor, vim kev kawm tau zoo tuaj yeem. Txoj kev ua lag luam yog ntau heev, xws li: MBE, CVD, PLD, .ZnO-TFT kev tshawb fawb kuj tau ua rau kev txiav txim siab nyob rau hauv.2003, Nomura li ib leeg siv lead ua InGaO3 (ZnO) 5 kom tau txais cov nyiaj hloov ntawm TFT cm2V -1 S-1 80 pab kiag li lawm. Lub Teb Chaws Mis Kas DuPont Co los ntawm lub tshuab nqus tsev thiab lub npog ntsej muag tshuab tsim ZnO-TFT hauv imitative ammonium on flexible substrate, uas yog hluav taws xob nyob ntawm Polyimide Saj zog substrate ammonium sulfite ntse tsim thawj kev siab ntawm ZnO-TFT, uas qhia tias TFT oxide mobility ntawm 50 cm2V-1 s-1. nyob rau hauv 2006, mus pib ib tug tshiab kev sib tw nyob rau hauv lub tshav pob ntawm Cheng. Nyob rau xyoo 2005, Chiang HQ thiab siv ZIO ua tus txheej txheem npaj hloov mus hloov yog 107. HC thiab cov yeeb yaj kiab yeeb yaj kiab transistor siv CBD npaj hloov qhov piv txwv yog 105, kev tsiv tsuam ntawm 0.248cm2V-1s-1 TFT, uas kuj qhia tau tias daim ntawv thov .

Ntsiab Cai Thawj

Hlauv zaj duab xis transistor yog ib lub qhov rooj nkag ntawm insulated transistor. Nws cov haujlwm ua haujlwm siv tau cov MOSFET siv lead ua los piav txog txoj haujlwm ua haujlwm ntawm Weimer. Raws li N channel MOSFET ua piv txwv, lub cev ntawm daim duab 2. thaum lub rooj vag voltage yog siv, qhov rooj vag voltage ntawm lub rooj vag insulating txheej hauv hluav taws xob los ntawm lub rooj vag electrode, lub hwj huam kab mus rau qhov hluav taws xob ntawm lub semiconductor thiab, qhov ntxaug nqi ntawm qhov chaw. Thaum nce ntawm qhov rooj vag voltage, lub semiconductor ntws yuav hloov ntawm depletion txheej rau electron accumulation txheej, inversion txheej ua thaum ncav lub inversion (piv txwv li qhib qhov hluav taws xob), qhov chaw tawm qhov hluav taws xob yuav tsum tau nrog cov cab kuj los ntawm cov channel thaum twg qhov dej poob yog. Sij hawm, txoj kev siv hluav taws xob yog kwv yees ua haujlwm tsis tu ncua, muab xau tam sim no nrog qhov chaw tawm qhov hluav taws xob ntws tawm tau qhov linearly. Thaum lub qhov dej txhaws deb qhov loj, nws yuav ua rau lub qhov hluav taws xob ntawm lub qhov rooj, lub qhov rooj ntawm lub qhov hluav taws xob los ntawm qhov chaw kom ntws tawm tsis muaj zog, Lub tshuab hluav taws xob ntim tawm ntawm lub hauv paus mus rau qhov dej qaug, qhov chaw ntws qhov hluav taws xob. Lub leakage tam sim no tsub kom qeeb, qhov sib txawv ntawm txoj kab hloov mus rau thaj tsam ntawm cov cua. Thaum twg qhov chaw ntws qhov hluav taws xob tau nce mus rau ib qhov twg, qhov ntws ntawm cov txheej xa tawm ntawm cov txheej txheem qis qis dua mus rau cov xoom, qhov hluav taws xob nce, qhov ntaus hauv cheeb tsam saturation. Hauv qhov tseeb ntawm LCD, tsuas yog los ntawm H-Tiv (qhib lub xeev loj dua qhov qhib lub qhov hluav taws xob) ceev them ntawm pixel capacitor, lub xeev tua kom muaj qhov voltage ntawm lub pixel capacitor, thiaj li paub qhov unification ntawm cov lus teb ceev ceev thiab kev nco zoo.

Prospects editor

Lub neej yav tom ntej ntawm TFT technology yuav nyob rau hauv high density, high resolution, lub zog txuag, portable, integrated mus rau hauv lub ntsiab ntawm txoj kev loj hlob, los ntawm keeb kwm kev loj hlob ntawm thin zaj duab xis transistor yog tham nyob rau hauv daim ntawv no thiab kev soj ntsuam ntawm typical TFT li, txawm tias tus tshiab OTFT, ZnO-TFT kev tshawb fawb tau qhia cov yam ntxwv ntawm qhov zoo, thiab txawm tias qee tus tau pib siv, tab sis kom ua tiav cov lag luam loj thiab txo nqi, tab sis kuj yuav tsum tau siv zog ntau heev. Nws yuav yog nyob rau lub sij hawm ntev heev thiab silicon cuab yeej coexist. Suav zaub technology yog nyob rau theem pib, daim ntawv tshawb fawb thiab kev loj hlob ntawm hom tshiab ntawm TFT ntaus thiab tso tawm tshuab tau coj zoo lub sijhawm thiab cov nyom los ntseeg. Nyob rau yav tom ntej, OTFT thiab ZnO-TFT qauv raws li yuav txhawb cov cim ceev ntawm optoelectronics.

Tswvyim editor

Lub TFT tso rau hauv ib lub substrate (raws li ua ntawv thov rau cov kua siv lead ua kua, qhov twg lub substrate yog saibxyuas iav), raws li ib cheeb tsam ntawm qhov chaw.

Feem ntau ntawm TFT siv hydrogenated amorphous silicon (a-Si: H) ua cov khoom tseem ceeb, vim hais tias nws cov zog muaj tsawg dua cov cov monocrystalline silicon (Eg = 1.12eV) thiab vim hais tias a-Si: H yog siv cov khoom tseem ceeb , TFT feem ntau tsis yog pob tshab. Tsis tas li ntawd, TFT feem ntau siv indium tin oxide (ITO) hauv dielectric, electrode thiab sab hauv thaiv, thaum ITO yog pob khoom.

Vim tias lub TFT substrate tsis pub siab kub siab heev, txhua yam kev xa dej yuav tsum tau ua nyob rau theem qis dua. Xws li cov tshuaj vapor deposition, lub cev vapor deposition (saibxyuas siv tshuab feem ntau) feem ntau siv rau hauv cov txheej txheem kev xa tawm. Yog hais tias cov ntaub npog pob TFT ntau lawm, thawj txoj kev yog siv cov ntaub ntawv tshawb Zinc Oxide, cov tshuab no luam tawm los ntawm Oregon State University cov kws tshawb fawb xyoo 2003.

Ntau tus neeg paub tias daim ntawv thov tseem ceeb ntawm thin-film transistors yog TFT, LCD, ib hom kua siv lead ua kua tshuab. Transistors yog ua nyob rau hauv lub vaj huam sib luag, uas txo cov cuam tshuam ntawm txhua tus pixel thiab nce duab stability. Roughly los ntawm 2004, feem ntau ntawm cov xim pheej yig xim LCD siv cov tshuab TFT. Lub vaj huam sib luag ntawm TFT kuj tseem siv cov duab X-ray duab, txawm nyob hauv cov mis thiab kab xoo hluav taws xob X-ray.

Tus tshiab AMOLED (active array OLED) npo kuj muaj ib tug built-in TFT txheej.