txheej txheem BCD

BCD txheej txheem yog dab tsi?

BCD txheej txheem yog ib qho kev sib xyaw ua ke ntawm cov txheej txheem thev naus laus zis thawj zaug los ntawm ST hauv xyoo 1986. Cov cuab yeej no tuaj yeem ua rau bipolar, CMOS thiab DMOS cov khoom siv ntawm tib lub nti. Nws cov tsos zoo heev txo qhov chaw ntawm lub nti.

Nws tuaj yeem hais tias cov txheej txheem BCD tau siv tag nrho cov txiaj ntsig ntawm kev muaj peev xwm tsav Bipolar, CMOS kev koom ua ke siab thiab kev siv hluav taws xob tsawg, thiab DMOS siab voltage thiab siab tam sim no muaj peev xwm. Ntawm lawv, DMOS yog tus yuam sij rau kev txhim kho lub zog thiab kev koom ua ke. Nrog rau kev txhim kho txuas ntxiv ntawm kev siv tshuab hluav taws xob sib txuas, BCD txheej txheem tau dhau los ua cov thev naus laus zis ntawm PMIC.

BCD txheej txheem hla ntu ntu, qhov chaw network, ua tsaug

Qhov zoo ntawm cov txheej txheem BCD

Cov txheej txheem BCD ua rau cov khoom siv Bipolar, CMOS li, thiab DMOS cov khoom siv hluav taws xob ntawm tib lub nti tib lub sijhawm, kev sib koom ua ke ntawm cov khoom siv hluav taws xob siab thiab muaj zog thauj khoom muaj peev xwm ntawm cov khoom siv bipolar thiab kev sib koom ua ke siab thiab kev siv hluav taws xob tsawg ntawm CMOS, kom lawv tuaj yeem ua kom tiav. ib leeg thiab muab kev ua si tag nrho rau lawv qhov zoo; tib lub sijhawm, DMOS tuaj yeem ua haujlwm hauv kev hloov pauv nrog lub zog siv hluav taws xob tsawg heev. Hauv luv luv, kev siv hluav taws xob tsawg, kev siv hluav taws xob siab thiab kev sib koom ua ke siab yog ib qho zoo ntawm BCD. Cov txheej txheem BCD tuaj yeem txo qis kev siv hluav taws xob, txhim kho kev ua haujlwm thiab muaj kev ntseeg tau zoo dua. Kev ua haujlwm ntawm cov khoom siv hluav taws xob tau nce ib hnub dhau ib hnub, thiab qhov yuav tsum tau muaj rau kev hloov pauv hluav taws xob, kev tiv thaiv capacitor thiab roj teeb lub neej txuas ntxiv tau dhau los ua qhov tseem ceeb. Cov yam ntxwv siab ceev thiab txuag hluav taws xob ntawm BCD ua tau raws li cov txheej txheem rau kev ua haujlwm siab analog / fais fab tswj chips.

Cov thev naus laus zis tseem ceeb ntawm cov txheej txheem BCD

Cov khoom siv ntawm cov txheej txheem BCD muaj xws li low-voltage CMOS, high-voltage MOS tubes, LDMOS nrog ntau yam kev sib tawg voltages, ntsug NPN / PNP thiab Schottky diodes, thiab lwm yam. Qee cov txheej txheem kuj koom nrog cov khoom siv xws li JFET thiab EEPROM, uas ua rau muaj ntau yam khoom siv. cov khoom siv hauv cov txheej txheem BCD. Yog li ntawd, nyob rau hauv tas li ntawd mus rau lub compatibility ntawm high-voltage pab kiag li lawm thiab low-voltage li, ob-nias txheej txheem thiab CMOS txheej txheem, thiab lwm yam nyob rau hauv lub tsim, tsim nyog kev cais technology yuav tsum tau txiav txim siab.

Hauv BCD kev rho tawm thev naus laus zis, ntau yam thev naus laus zis xws li kev sib cais kev sib cais, kev cais tus kheej thiab kev cais tawm dielectric tau tshwm sim ib zaug. Kev sib cais tshuab yog ua kom cov cuab yeej ntawm N-hom epitaxial txheej ntawm P-hom substrate thiab siv cov yam ntxwv rov qab tsis zoo ntawm PN kev sib tshuam kom ua tiav kev sib cais, vim tias PN junction muaj kev tiv thaiv siab heev nyob rau hauv kev tsis ncaj ncees.

Kev sib cais ntawm tus kheej yog qhov tseem ceeb PN kev sib cais kev sib cais, uas tso siab rau cov yam ntxwv ntawm PN kev sib tshuam ntawm lub hauv paus thiab ntws cov cheeb tsam ntawm cov cuab yeej thiab cov substrate kom ua tiav kev sib cais. Thaum lub raj MOS qhib, lub hauv paus cheeb tsam, qhov dej ntws thiab cov channel yog nyob ib puag ncig los ntawm cheeb tsam depletion, tsim kev cais tawm ntawm lub substrate. Thaum nws raug muab tua, PN kev sib tshuam ntawm thaj av ntws thiab cov substrate yog thim rov qab, thiab qhov hluav taws xob siab ntawm thaj av yog cais los ntawm cheeb tsam depletion.

Dielectric rho tawm siv cov xov xwm insulating xws li silicon oxide kom ua tiav kev sib cais. Raws li kev sib cais dielectric thiab kev sib cais sib cais, quasi-dielectric cais tau raug tsim los ntawm kev sib txuas qhov zoo ntawm ob qho tib si. Los ntawm kev xaiv siv cov thev naus laus zis sib cais saum toj no, kev sib tw high-voltage thiab low-voltage compatibility tuaj yeem ua tiav.

Txoj kev loj hlob ntawm cov txheej txheem BCD

Txoj kev loj hlob ntawm BCD txheej txheem thev naus laus zis tsis zoo li cov txheej txheem CMOS tus qauv, uas ib txwm ua raws li Moore txoj cai los txhim kho nyob rau hauv cov kev taw qhia ntawm cov kab me me dav thiab ceev ceev. BCD txheej txheem yog kwv yees sib txawv thiab tsim nyob rau hauv peb cov lus qhia: high voltage, siab zog, thiab siab ceev.

1. High-voltage BCD kev taw qhia

High-voltage BCD tuaj yeem tsim kev ntseeg siab qis-voltage tswj circuits thiab ultra-high-voltage DMOS-theem circuits ntawm tib lub nti tib lub sijhawm, thiab tuaj yeem paub txog kev tsim khoom ntawm 500-700V high-voltage li. Txawm li cas los xij, feem ntau, BCD tseem tsim nyog rau cov khoom lag luam nrog cov kev xav tau siab rau cov khoom siv hluav taws xob, tshwj xeeb tshaj yog BJT lossis cov khoom siv DMOS siab tam sim no, thiab tuaj yeem siv rau kev tswj fais fab hauv hluav taws xob teeb pom kev zoo thiab kev lag luam.

Lub tshuab tam sim no rau kev tsim hluav taws xob siab BCD yog RESURF thev naus laus zis tau npaj los ntawm Appel li al. Nyob rau hauv 1979. Cov cuab yeej yog tsim los siv ib tug maj mam doped epitaxial txheej los ua rau saum npoo hluav taws xob teb tis flatter, yog li kev txhim kho cov nto deg yam ntxwv, thiaj li hais tias qhov kev puas tsuaj tshwm sim nyob rau hauv lub cev es tsis txhob ntawm qhov chaw, yog li ua rau cov cuab yeej tawg voltage. Lub teeb doping yog lwm txoj hauv kev los ua kom lub zog tawg ntawm BCD. Nws tsuas yog siv ob chav diffused DDD (ob chav Doping Drain) thiab maj mam doped ntws LDD (me ntsis Doping Drain). Hauv cheeb tsam DMOS ntws, thaj tsam N-hom drift yog ntxiv los hloov qhov kev sib cuag thawj zaug ntawm N + ntws thiab P-hom substrate rau kev sib cuag ntawm N- ntws thiab P-hom substrate, yog li ua kom qhov tawg tawg.

2. High-power BCD kev taw qhia

Qhov voltage ntau ntawm high-power BCD yog 40-90V, thiab nws yog tsuas yog siv nyob rau hauv automotive electronics uas yuav tsum tau muaj peev xwm tsav tam sim no, nruab nrab voltage thiab yooj yim tswj circuits. Nws cov yam ntxwv xav tau yog qhov muaj peev xwm tsav tam sim no, nruab nrab voltage, thiab kev tswj xyuas Circuit Court feem ntau kuj yooj yim.

3. High-density BCD kev taw qhia

High-density BCD, qhov voltage ntau yog 5-50V, thiab qee cov khoom siv hluav taws xob hauv tsheb yuav ncav cuag 70V. Ntau thiab ntau txoj haujlwm thiab ntau haiv neeg tuaj yeem koom ua ke ntawm tib lub nti. High-density BCD txais qee cov tswv yim tsim qauv kom ua tiav cov khoom sib txawv, feem ntau yog siv hauv kev siv hluav taws xob hauv tsheb.

Cov kev siv tseem ceeb ntawm cov txheej txheem BCD

BCD txheej txheem yog dav siv nyob rau hauv kev tswj fais fab (lub hwj chim thiab roj teeb tswj), tso saib tsav, automotive electronics, industrial tswj, thiab lwm yam. Fais fab tswj nti (PMIC) yog ib qho tseem ceeb ntawm analog chips. Kev sib xyaw ua ke ntawm cov txheej txheem BCD thiab SOI thev naus laus zis kuj yog qhov tseem ceeb ntawm kev txhim kho cov txheej txheem BCD.

VET-Tuam Tshoj tuaj yeem muab cov khoom graphite, softrigid muaj, silicon carbide qhov chaw, cvD silicon carbide qhov chaw, thiab sic / Tac coated partswith hauv 30 hnub.
Yog tias koj txaus siab rau cov khoom lag luam semiconductor saum toj no, thov tsis txhob yig tiv tauj peb thawj zaug.

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