Utloisisa phapang lipakeng tsa limaraka tse fapaneng tsa SSD Chips tsa NAND Flash SLC, MLC, TLC, QLC

Lebitso le felletseng la NAND Flash ke Flash Memory, eo e leng ea sesebelisoa sa memori se sa fetoheng (Non-volatile Memory Device).E ipapisitse le moralo o phaphametseng oa heke ea transistor, 'me litefiso li ts'oaroa ka heke e phaphametseng.Kaha heke e phaphametseng e arotsoe ka motlakase, kahoo Lielektrone tse fihlang hekeng li qabeletsoe le ka mor'a hore motlakase o tlosoe.Ena ke mabaka a utloahalang a ho se feto-fetohe ha flash.Lintlha li bolokiloe lisebelisoa tse joalo 'me li ke ke tsa lahleha le haeba matla a tima.
Ho latela nanotechnology e fapaneng, NAND Flash e bile le phihlelo ea phetoho ho tloha SLC ho ea MLC, le ho ea ho TLC, 'me e ntse e leba QLC.NAND Flash e sebelisoa haholo ho eMMC / eMCP, U disk, SSD, koloi, Inthanete ea Lintho le masimo a mang ka lebaka la bokhoni ba eona bo boholo le lebelo la ho ngola ka potlako.

SLC (Lebitso le felletseng la Senyesemane (Seleng ea Boemo bo le Mong - SLC) ke polokelo ea boemo bo le bong
Sebopeho sa theknoloji ea SLC ke hore filimi ea oxide pakeng tsa heke e phaphametseng le mohloli o mosesaane.Ha u ngola data, tefiso e bolokiloeng e ka felisoa ka ho sebelisa voltage ho tefiso ea heke e phaphametseng ebe e feta mohloling., ke hore, liphetoho tse peli feela tsa motlakase oa 0 le 1 li ka boloka 1 tlhahisoleseding ea boitsebiso, ke hore, 1 bit / cell, e khetholloang ka lebelo le potlakileng, bophelo bo bolelele le ts'ebetso e matla.Bothata ke hore bokhoni bo tlaase 'me litšenyehelo li phahame.

MLC (Lebitso la Senyesemane le felletseng la Multi-Level Cell - MLC) ke polokelo e nang le mekhahlelo e mengata
Intel (Intel) e ntlafalitse MLC ka katleho ka lekhetlo la pele ka Loetse 1997. Mosebetsi oa eona ke ho boloka likarolo tse peli tsa tlhahisoleseling ho Floating Gate (karolo eo tefiso e bolokiloeng ka seleng ea memori ea flash), ebe o sebelisa tefiso ea menyetla e fapaneng (Level. ), Ho bala le ho ngola ka nepo ka taolo ea motlakase e bolokiloeng mohopolong.
Ke hore, 2bit / sele, sele e 'ngoe le e' ngoe e boloka boitsebiso ba 2bit, e hloka taolo e rarahaneng ea motlakase, ho na le liphetoho tse 'nè tsa 00, 01, 10, 11, lebelo ka kakaretso ke karolelano, bophelo ke karolelano, theko ke karolelano, hoo e ka bang 3000-10000 linako tsa ho hlakola le ho ngola bophelo.MLC e sebetsa ka ho sebelisa palo e kholo ea boemo ba motlakase, sele e 'ngoe le e' ngoe e boloka likotoana tse peli tsa data, 'me boholo ba data bo batla bo le boholo,' me bo ka boloka litekanyetso tse fetang 4 ka nako.Ka hona, meaho ea MLC e ka ba le matla a polokelo a betere.

TLC (Lebitso le felletseng la Senyesemane la Trinary-Level Cell) ke polokelo ea mekhahlelo e meraro
TLC ke 3bit ka sele.Karolo e 'ngoe le e' ngoe ea sele e boloka boitsebiso ba 3bit, bo ka bolokang 1/2 data ho feta MLC.Ho na le mefuta e 8 ea liphetoho tsa motlakase ho tloha ho 000 ho ea ho 001, ke hore, 3bit/cell.Ho boetse ho na le baetsi ba Flash ba bitsoang 8LC.Nako e hlokahalang ea ho kena e telele, kahoo lebelo la ho fetisa le fokotseha.
Molemo oa TLC ke hore theko e theko e tlaase, theko ea tlhahiso ka megabyte e tlaase ka ho fetisisa, 'me theko e theko e tlaase, empa bophelo bo khutšoanyane, ke hoo e ka bang 1000-3000 feela ea ho hlakola le ho ngola bophelo, empa likaroloana tsa TLC tse lekiloeng haholo li ka khona. e sebelisoa ka mokhoa o tloaelehileng ho feta lilemo tse 5.

QLC (Lebitso le felletseng la Senyesemane la Quadruple-Level Cell) yuniti ea polokelo ea mekhahlelo e mene
QLC e ka boela ea bitsoa 4bit MLC, yuniti ea polokelo ea mekhahlelo e mene, ke hore, 4bits/cell.Ho na le liphetoho tse 16 ho motlakase, empa matla a ka eketsoa ka 33%, ke hore, ts'ebetso ea ho ngola le bophelo ba ho hlakola e tla fokotseha ho feta ha e bapisoa le TLC.Tekong e khethehileng ea ts'ebetso, Magnesium e entse liteko.Mabapi le lebelo la ho bala, li-interface tsa SATA ka bobeli li ka fihla ho 540MB/S.QLC e sebetsa hampe ho feta lebelo la ho ngola, hobane nako ea eona ea lenaneo la P / E e telele ho feta MLC le TLC, lebelo le lieha, 'me lebelo le tsoelang pele la ho ngola ke Ho tloha ho 520MB / s ho ea ho 360MB / s, ts'ebetso e sa tloaelehang e theohile ho tloha 9500 IOPS ho ea ho 5000. IOPS, tahlehelo e ka bang halofo.

PS: Ha boitsebiso bo bongata bo bolokiloeng karolong e 'ngoe le e' ngoe ea Cell, ho ba le matla a phahameng ka ho fetisisa sebakeng se seng le se seng, empa ka nako e ts'oanang, ho lebisa ho eketseha ha libaka tse fapaneng tsa motlakase, tseo ho leng thata ho li laola, kahoo botsitso ba NAND Flash chip. e ba mpe le ho feta, 'me bophelo ba tšebeletso bo ba bokhutšoanyane, e' ngoe le e 'ngoe e na le melemo le melemo ea eona.

(NAND Flash bala le ho ngola bophelo ke bakeng sa litšupiso feela)
Ha ho thata ho bona hore ts'ebetso ea mefuta e mene ea NAND flash memory e fapane.Litsenyehelo tsa yuniti ea SLC li phahame ho feta tsa mefuta e meng ea likaroloana tsa memori ea NAND, empa nako ea eona ea ho boloka data e telele le lebelo la ho bala le potlakile;QLC e na le bokhoni bo boholo le litšenyehelo tse tlase, empa ka lebaka la ho tšepahala ha eona le nako e telele Mefokolo le mefokolo e meng e ntse e hloka ho ntlafatsoa.

Ho latela pono ea litšenyehelo tsa tlhahiso, lebelo la ho bala le ho ngola le bophelo ba ts'ebeletso, maemo a mekhahlelo e mene ke:
SLC> MLC> TLC> QLC;
Litharollo tsa hajoale ke MLC le TLC.SLC e shebane haholo le lits'ebetso tsa sesole le tsa likhoebo, ka mongolo o potlakileng haholo, sekhahla sa liphoso se tlase, le nako e telele.MLC e shebane haholo le lits'ebetso tsa maemo a bareki, matla a eona a phahame ka makhetlo a 2 ho feta SLC, a theko e tlase, a loketse li-flash drive tsa USB, mehala ea thekeng, lik'hamera tsa dijithale le likarete tse ling tsa memori, hape e sebelisoa haholo ho SSD ea boemo ba bareki kajeno. .

Memori ea Flash ea NAND e ka aroloa ka mekhahlelo e 'meli: sebopeho sa 2D le sebopeho sa 3D ho latela meaho e fapaneng ea sebaka.Li-transistors tsa heke tse phaphametseng li sebelisoa haholo bakeng sa 2D FLASH, ha 3D flash e sebelisa haholo li-transistors tsa CT le heke e phaphametseng.Ke semiconductor, CT ke insulator, tse peli li fapane ka tlhaho le molao-motheo.Phapano ke:

2D sebopeho NAND Flash
Sebopeho sa 2D sa lisele tsa memori se hlophisitsoe feela ka sefofaneng sa XY sa chip, kahoo tsela e le 'ngoe feela ea ho finyella boima bo phahameng ka har'a sephahla se tšoanang ho sebelisa theknoloji ea 2D flash ke ho fokotsa node ea ts'ebetso.
Taba e nyahamisang ke hore liphoso tsa NAND flash li etsahala khafetsa bakeng sa li-node tse nyane;ho phaella moo, ho na le moeli ho node e nyenyane ka ho fetisisa e ka sebelisoang, 'me boima ba polokelo ha bo phahame.

Sebopeho sa 3D NAND Flash
Ho eketsa bongata ba polokelo, bahlahisi ba thehile theknoloji ea 3D NAND kapa V-NAND (vertical NAND), e bokellang lisele tsa memori ho sefofane sa Z sephakeng se tšoanang.

Ka 3D NAND flash, lisele tsa memori li hokahane e le likhoele tse otlolohileng ho fapana le likhoele tse tšekaletseng ho 2D NAND, mme ho aha ka tsela ena ho thusa ho fihlela sekhahla se phahameng bakeng sa sebaka se le seng sa chip.Lihlahisoa tsa pele tsa 3D Flash li ne li e-na le mekhahlelo e 24.