Uburyo bwa BCD

Uburyo bwa BCD ni iki?

Uburyo bwa BCD ni ikoranabuhanga rikoresha chip imwe ryatangijwe bwa mbere na ST mu 1986. Iri koranabuhanga rishobora gukora ibikoresho bya bipolar, CMOS na DMOS kuri chip imwe. Isura yaryo igabanya cyane ubuso bwa chip.

Dushobora kuvuga ko inzira ya BCD ikoresha neza ibyiza byo gutwara ibintu mu buryo bwa Bipolar, CMOS ifite ubushobozi bwo guhuza ibintu byinshi n'ingufu nke, hamwe na DMOS ifite ingufu nyinshi n'ubushobozi bwo kugenda kw'amashanyarazi menshi. Muri zo, DMOS ni ingenzi mu kunoza ingufu no guhuza ibintu. Hamwe n'iterambere ry'ikoranabuhanga rya "integrated circuit", inzira ya BCD yabaye ikoranabuhanga rikuru ryo gukora ibintu rya PMIC.

Ishusho y'ibice bya BCD, umuyoboro w'isoko, murakoze

Ibyiza by'uburyo bwo gukora BCD

Uburyo bwa BCD bukora ibikoresho bya Bipolar, ibikoresho bya CMOS, n'ibikoresho bya DMOS kuri chip imwe icyarimwe, bihuza ubushobozi bwo gutwara ibintu byinshi n'ubushobozi bukomeye bwo gutwara imizigo bw'ibikoresho bya bipolar hamwe n'ubushobozi bwo guhuza no gukoresha imbaraga nke bya CMOS, kugira ngo bishobore kuzuzanya no guha umwanya wose ibyiza byabyo; icyarimwe, DMOS ishobora gukora mu buryo bwo guhinduranya ingufu hamwe n'ubushobozi buke cyane. Muri make, gukoresha ingufu nke, gukoresha ingufu neza no guhuza imbaraga ni bimwe mu byiza by'ingenzi bya BCD. Uburyo bwa BCD bushobora kugabanya cyane ikoreshwa ry'imbaraga, kunoza imikorere ya sisitemu no kugira icyizere cyiza. Imikorere y'ibicuruzwa bya elegitoroniki iriyongera umunsi ku wundi, kandi ibisabwa kugira ngo habeho impinduka z'amashanyarazi, kurinda capacitor no kongera igihe bateri ikora birimo kuba ingenzi cyane. Imiterere ya BCD yihuta kandi izigama ingufu ihura n'ibisabwa mu buryo bwo gucunga ibikoresho bya analog/power.

Ikoranabuhanga ry'ingenzi rya gahunda ya BCD

Ibikoresho bisanzwe bya BCD birimo CMOS ifite voltage nkeya, imiyoboro ya MOS ifite voltage nyinshi, LDMOS ifite voltage zitandukanye zo kugabanya, NPN/PNP na diode za Schottky, nibindi. Hari uburyo bumwe na bumwe buhuza ibikoresho nka JFET na EEPROM, bigatuma habaho ubwoko bwinshi bwibikoresho muri BCD. Kubwibyo, uretse gusuzuma uburyo ibikoresho bifite voltage nyinshi bihura nibikoresho bifite voltage nkeya, uburyo bwo gukanda inshuro ebyiri nibikorwa bya CMOS, nibindi mu gishushanyo, ikoranabuhanga rikwiye ryo kwitandukanya naryo rigomba kwitabwaho.

Mu ikoranabuhanga ryo kwitandukanya rya BCD, ikoranabuhanga rinini nko kwitandukanya kw'amahuriro, kwitandukanya no kwitandukanya kwa dielectric ryagaragaye rimwe ku rindi. Ikoranabuhanga ryo kwitandukanya kw'amahuriro ni ugukora igikoresho ku gice cya epitaxial cya N cy'ubwoko bwa P-type substrate no gukoresha imiterere ya reverse bias y'amahuriro ya PN kugira ngo kigere ku kwitandukanya, kuko ihuriro rya PN rifite ubushobozi bwo guhangana cyane iyo rihanganye n'itandukaniro ry'amahuriro.

Ikoranabuhanga ryo kwitandukanya mu buryo bwihariye ni ukwitandukanya kwa PN, bishingiye ku miterere karemano ya PN hagati y’aho igikoresho gituruka n’aho gitembera n’aho gitembera kugira ngo kigere ku kwitandukanya. Iyo umuyoboro wa MOS ufunguye, akarere gaturukamo, akarere gasohokamo n’umuyoboro bikikijwe n’akarere gasohokamo, bigahinduka kwitandukanya n’aho gitembera. Iyo kizimye, aho PN ihurira hagati y’akarere gasohokamo n’aho gitembera kiba gihagaze inyuma, kandi ingufu nyinshi z’aho gituruka ziba zitandukanijwe n’akarere gasohokamo.

Gutandukanya amashanyarazi hakoreshejwe uburyo bwo gukingira amashanyarazi nka silicon oxyde kugira ngo bigere ku buryo bwo gutandukanya amashanyarazi. Hashingiwe ku buryo bwo gutandukanya amashanyarazi hakoreshejwe uburyo ...

Icyerekezo cy'iterambere rya gahunda ya BCD

Iterambere ry'ikoranabuhanga rya BCD ntabwo rimeze nk'irya CMOS risanzwe, ryagiye rikurikiza itegeko rya Moore ryo gutera imbere mu cyerekezo cy'ubugari bw'umurongo muto n'umuvuduko wihuta. Iterambere rya BCD ritandukanye cyane kandi rigatera imbere mu byerekezo bitatu: ingufu nyinshi, ingufu nyinshi, n'ubucucike bwinshi.

1. Icyerekezo cya BCD gifite voltage nyinshi

BCD ifite voltage nyinshi ishobora gukora imiyoboro igenzura umuriro muke n'imiyoboro ya DMOS ifite voltage nyinshi icyarimwe, kandi ishobora gukora ibikoresho bifite voltage nyinshi za 500-700V. Ariko, muri rusange, BCD iracyakwiriye ibicuruzwa bifite ibisabwa byinshi ku bikoresho by'amashanyarazi, cyane cyane BJT cyangwa ibikoresho bya DMOS bifite ingufu nyinshi, kandi ishobora gukoreshwa mu kugenzura umuriro mu matara y'ikoranabuhanga no mu nganda.

Ikoranabuhanga ririho ubu ryo gukora BCD ifite ingufu nyinshi ni ikoranabuhanga rya RESURF ryatanzwe na Appel et al. mu 1979. Iki gikoresho cyakozwe hakoreshejwe urwego rworoheje rwa epitaxial kugira ngo amashanyarazi yo hejuru akwirakwizwe neza, bityo bikanoza imiterere y’ubuso, bityo kwangirika kw’amazi biba mu mubiri aho kuba hejuru, bityo byongera ingufu z’amashanyarazi zo kwangirika kw’igikoresho. Gukoresha ingufu z’amashanyarazi zoroheje ni ubundi buryo bwo kongera ingufu z’amashanyarazi zo kwangirika kwa BCD. Ikoresha cyane cyane DDD y’amazi yuzuye inshuro ebyiri (double Doping Drain) na LDD y’amazi yuzuye (lightly Doping Drain). Mu gace k’amazi ya DMOS, hongerwaho agace k’amazi yo mu bwoko bwa N kugira ngo hahindurwe aho amazi ya N+ ahurira n’agace k’amazi yo mu bwoko bwa P ahurira n’aho amazi yo mu bwoko bwa N ahurira n’agace k’amazi yo mu bwoko bwa P ahurira, bityo byongera ingufu z’amashanyarazi zo kwangirika.

2. Icyerekezo cya BCD gifite imbaraga nyinshi

Ingano y'amashanyarazi ya BCD ifite ingufu nyinshi ni 40-90V, kandi ikoreshwa cyane cyane mu bikoresho by'ikoranabuhanga by'imodoka bisaba ubushobozi bwo gutwara umuriro mwinshi, voltage iciriritse n'imiyoboro yoroshye yo kugenzura. Ibiranga ubwinshi bwayo ni ubushobozi bwo gutwara umuriro mwinshi, voltage iciriritse, kandi circuit yo kugenzura akenshi iba yoroshye.

3. Icyerekezo cya BCD gifite ubucucike bwinshi

BCD ifite ubucucike bwinshi, urwego rw'amashanyarazi ni 5-50V, naho bimwe mu bikoresho by'ikoranabuhanga bikoresha imodoka bizagera kuri 70V. Imirimo myinshi igoye kandi itandukanye ishobora guhuzwa kuri chip imwe. BCD ifite ubucucike bwinshi ikoresha ibitekerezo bimwe na bimwe byo gushushanya kugira ngo igere ku gutandukanya ibicuruzwa, cyane cyane bikoreshwa mu bikoresho by'ikoranabuhanga bikoresha imodoka.

Imikoreshereze y'ingenzi ya gahunda ya BCD

Uburyo bwa BCD bukoreshwa cyane mu gucunga ingufu (ingufu n'igenzura rya batiri), disiki, ibikoresho by'ikoranabuhanga by'imodoka, kugenzura inganda, n'ibindi. Chip yo gucunga ingufu (PMIC) ni imwe mu moko y'ingenzi ya chips za analog. Guhuza uburyo bwa BCD n'ikoranabuhanga rya SOI nabyo ni ikintu gikomeye mu iterambere rya gahunda ya BCD.

VET-China ishobora gutanga ibice bya grafiti, felt yoroshye, ibice bya silicon carbide, ibice bya silicon carbide ya cvD, n'ibice bya sic/Tac byasizwe mu minsi 30.
Niba ushishikajwe n'ibicuruzwa bya semiconductor byavuzwe haruguru, nyamuneka ntutindiganye kutwandikira bwa mbere.

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