Lub npe tag nrho ntawm NAND Flash yog Flash Memory, uas belongs rau lub cim xeeb tsis hloov pauv (Non-volatile Memory Device).Nws yog raws li lub rooj vag floating transistor tsim, thiab cov nqi yog latched los ntawm lub rooj vag ntab.Txij li thaum lub rooj vag ntab yog hluav taws xob cais, yog li Electrons ncav cuag lub rooj vag raug kaw txawm tias tom qab qhov hluav taws xob raug tshem tawm.Qhov no yog qhov laj thawj rau flash non-volatility.Cov ntaub ntawv khaws cia hauv cov khoom siv zoo li no thiab yuav tsis ploj txawm tias lub hwj chim raug tua.
Raws li kev sib txawv nanotechnology, NAND Flash tau ntsib kev hloov pauv ntawm SLC mus rau MLC, thiab tom qab ntawd mus rau TLC, thiab tab tom mus rau QLC.NAND Flash tau siv dav hauv eMMC / eMCP, U disk, SSD, tsheb, Internet ntawm Yam thiab lwm yam kev lag luam vim nws muaj peev xwm loj thiab kev sau ntawv ceev.
SLC (Lus Askiv lub npe tag nrho (Single-Level Cell – SLC) yog ib qib kev cia
Tus yam ntxwv ntawm SLC technology yog cov oxide zaj duab xis ntawm lub rooj vag ntab thiab lub hauv paus yog nyias.Thaum sau cov ntaub ntawv, cov nqi khaws cia tuaj yeem raug tshem tawm los ntawm kev siv lub zog hluav taws xob rau tus nqi ntawm lub rooj vag ntab thiab tom qab ntawd dhau los ntawm qhov chaw., uas yog, tsuas yog ob qhov kev hloov pauv ntawm 0 thiab 1 tuaj yeem khaws 1 cov ntaub ntawv qhia, uas yog, 1 ntsis / cell, uas yog tus cwj pwm los ntawm kev ceev ceev, lub neej ntev thiab kev ua haujlwm zoo.Qhov tsis zoo yog qhov muaj peev xwm tsawg thiab tus nqi siab.
MLC (Lus Askiv lub npe Multi-Level Cell - MLC) yog ntau txheej cia
Intel (Intel) thawj zaug ua tiav tsim MLC hauv lub Cuaj Hli 1997. Nws txoj haujlwm yog khaws ob chav ntawm cov ntaub ntawv rau hauv Floating Gate (qhov chaw uas tus nqi khaws cia hauv lub cim xeeb flash), thiab tom qab ntawd siv tus nqi sib txawv (Qib ), Kev nyeem ntawv kom raug thiab sau ntawv los ntawm kev tswj hluav taws xob khaws cia hauv lub cim xeeb.
Ntawd yog, 2bit / cell, txhua chav tsev ntawm tes khaws cov ntaub ntawv 2-ntsis, yuav tsum muaj kev tswj hluav taws xob ntau dua, muaj plaub qhov kev hloov pauv ntawm 00, 01, 10, 11, qhov ceev yog feem ntau nruab nrab, lub neej yog nruab nrab, tus nqi nruab nrab, txog. 3000-10000 zaug ntawm kev tshem tawm thiab sau lub neej.MLC ua haujlwm los ntawm kev siv cov qib hluav taws xob ntau, txhua lub xov tooj ntawm tes khaws ob cov ntaub ntawv, thiab cov ntaub ntawv ceev yog qhov loj, thiab tuaj yeem khaws ntau dua 4 tus nqi ntawm ib lub sijhawm.Yog li, MLC architecture tuaj yeem muaj qhov ceev cia zoo dua.
TLC (Lus Askiv lub npe Trinary-Level Cell) yog peb-theem cia
TLC yog 3 ntsis rau ib lub xov tooj.Txhua chav cell khaws cov ntaub ntawv 3-ntsis, uas tuaj yeem khaws 1/2 cov ntaub ntawv ntau dua li MLC.Muaj 8 hom kev hloov hluav taws xob los ntawm 000 txog 001, uas yog, 3 ntsis / cell.Tseem muaj Flash manufacturers hu ua 8LC.Lub sijhawm yuav tsum tau nkag mus ntev dua, yog li kev hloov pauv qeeb qeeb.
Qhov zoo ntawm TLC yog tias tus nqi pheej yig, tus nqi tsim khoom ib megabyte yog qhov qis tshaj, thiab tus nqi pheej yig, tab sis lub neej luv luv, tsuas yog li 1000-3000 tshem tawm thiab rov sau lub neej, tab sis kev sim TLC hnyav SSD tuaj yeem siv ib txwm rau ntau tshaj 5 xyoos.
QLC (Lus Askiv lub npe Quadruple-Level Cell) plaub-txheej cia chav tsev
QLC tseem tuaj yeem hu ua 4-ntsis MLC, plaub-txheej cia chav tsev, uas yog, 4bits / cell.Muaj 16 qhov kev hloov pauv hauv qhov hluav taws xob, tab sis lub peev xwm tuaj yeem nce los ntawm 33%, uas yog, kev sau ntawv thiab kev tshem tawm lub neej yuav raug txo qis dua piv nrog TLC.Hauv kev sim ua haujlwm tshwj xeeb, Magnesium tau ua cov kev sim.Hais txog kev nyeem ntawv ceev, ob qho tib si ntawm SATA interfaces tuaj yeem ncav cuag 540MB / S.QLC ua haujlwm tsis zoo hauv kev sau ntawv nrawm, vim tias nws lub sijhawm ua haujlwm P / E ntev dua MLC thiab TLC, qhov nrawm nrawm dua, thiab kev sau nrawm nrawm yog Los ntawm 520MB / s txog 360MB / s, qhov kev ua haujlwm tsis zoo poob los ntawm 9500 IOPS rau 5000 IOPS, poob ze li ib nrab.
PS: Cov ntaub ntawv ntau dua khaws cia hauv txhua chav Cell, ntau dua qhov muaj peev xwm ntawm ib chav tsev, tab sis tib lub sijhawm, nws ua rau muaj kev nce ntxiv hauv cov xeev sib txawv, uas nyuaj rau tswj, yog li kev ruaj ntseg ntawm NAND Flash nti. ua phem dua, thiab kev pabcuam lub neej yuav luv dua, txhua tus muaj nws qhov zoo thiab qhov tsis zoo.
| Storage Capacity Ib Chav | Unit Erase/Sau Lub Neej | |
| SLC | 1 ntsis / cell | 100,000 / sijhawm |
| MLC | 1 ntsis / cell | 3,000-10,000 / sijhawm |
| TLC | 1 ntsis / cell | 1,000 / sijhawm |
| QLC | 1 ntsis / cell | 150-500 / sijhawm |
(NAND Flash nyeem thiab sau lub neej yog rau kev siv nkaus xwb)
Nws tsis yooj yim pom tias qhov kev ua tau zoo ntawm plaub hom NAND flash nco txawv.Tus nqi ntawm ib chav tsev muaj peev xwm ntawm SLC yog siab dua li ntawm lwm hom NAND flash nco hais, tab sis nws cov ntaub ntawv khaws cia lub sij hawm ntev dua thiab kev nyeem ntawv nrawm dua;QLC muaj peev xwm loj dua thiab tus nqi qis dua, tab sis vim nws tsis tshua muaj kev ntseeg siab thiab kev ua haujlwm ntev thiab lwm yam tsis zoo tseem yuav tsum tau tsim kho ntxiv.
Los ntawm qhov kev xav ntawm tus nqi tsim khoom, nyeem thiab sau nrawm thiab kev pabcuam lub neej, qeb ntawm plaub pawg yog:
SLC>MLC>TLC>QLC;
Cov kev daws teeb meem tseem ceeb tam sim no yog MLC thiab TLC.SLC feem ntau yog tsom rau kev siv tub rog thiab kev lag luam, nrog rau kev sau ntawv ceev, tsawg qhov yuam kev, thiab ua haujlwm ntev.MLC feem ntau yog tsom rau cov neeg siv khoom siv, nws lub peev xwm yog 2 npaug siab dua SLC, tus nqi qis, haum rau USB flash drives, xov tooj ntawm tes, lub koob yees duab digital thiab lwm daim npav nco, thiab tseem siv dav hauv cov neeg siv khoom qib SSD niaj hnub no. .
NAND flash nco tuaj yeem muab faib ua ob pawg: 2D qauv thiab 3D qauv raws li cov qauv sib txawv.Floating gate transistors feem ntau yog siv rau 2D FLASH, thaum 3D flash tsuas yog siv CT transistors thiab lub rooj vag ntab.Yog ib tug semiconductor, CT yog ib tug insulator, ob yog txawv nyob rau hauv cov xwm thiab lub hauv paus ntsiab lus.Qhov txawv yog:
2D qauv NAND Flash
2D qauv ntawm lub cim xeeb hlwb tsuas yog teem rau hauv XY dav hlau ntawm lub nti, yog li tib txoj hauv kev kom ua tiav siab dua nyob rau hauv tib lub wafer siv 2D flash thev naus laus zis yog kom txo qis cov txheej txheem node.
Qhov tsis zoo yog qhov yuam kev hauv NAND flash ntau zaus rau cov nodes me;Tsis tas li ntawd, muaj kev txwv rau cov txheej txheem me me uas tuaj yeem siv tau, thiab qhov ceev cia tsis siab.
3D qauv NAND Flash
Txhawm rau kom ceev ceev cia, cov tuam txhab tsim 3D NAND lossis V-NAND ( ntsug NAND) thev naus laus zis, uas khaws cov cim xeeb hauv Z-plane ntawm tib lub wafer.
Hauv 3D NAND flash, lub cim xeeb ntawm lub hlwb txuas nrog cov hlua ntsug es tsis yog cov hlua kab rov tav hauv 2D NAND, thiab lub tsev hauv txoj kev no yuav pab ua kom muaj qhov ntom ntom ntom nti rau tib lub nti.Thawj 3D Flash khoom muaj 24 txheej.
Post lub sij hawm: May-20-2022
