Ni ubuhe buryo bwa BCD?
Inzira ya BCD ni tekinoroji imwe ihuriweho na tekinoroji yatangijwe bwa mbere na ST mu 1986. Iri koranabuhanga rishobora gukora ibikoresho bya bipolar, CMOS na DMOS kuri chip imwe. Isura yayo igabanya cyane ubuso bwa chip.
Birashobora kuvugwa ko inzira ya BCD ikoresha neza ibyiza byubushobozi bwo gutwara Bipolar, CMOS ihuza cyane hamwe nogukoresha ingufu nke, hamwe na DMOS yumuriro mwinshi hamwe nubushobozi bwo gutembera cyane. Muri byo, DMOS ni urufunguzo rwo kuzamura imbaraga no kwishyira hamwe. Hamwe niterambere ryiterambere rya tekinoroji yumuzunguruko, inzira ya BCD yahindutse tekinoroji yingenzi yo gukora PMIC.
Igishushanyo cya BCD cyambukiranya ibice, umuyoboro winkomoko, urakoze
Ibyiza bya BCD
Inzira ya BCD ikora ibikoresho bya Bipolar, ibikoresho bya CMOS, hamwe nimbaraga za DMOS kuri chip imwe icyarimwe, igahuza transconductance nini hamwe nubushobozi bukomeye bwo gutwara imizigo yibikoresho bya bipolar hamwe no guhuza cyane no gukoresha ingufu nke za CMOS, kugirango zishobore kuzuzanya buriwese kandi atange umukino wuzuye kubyiza byabo; icyarimwe, DMOS irashobora gukora muburyo bwo guhinduranya hamwe no gukoresha ingufu nke cyane. Muri make, gukoresha ingufu nke, gukoresha ingufu nyinshi no kwishyira hamwe ni kimwe mubyingenzi byingenzi bya BCD. Inzira ya BCD irashobora kugabanya cyane gukoresha ingufu, kunoza imikorere ya sisitemu no kugira ubwizerwe bwiza. Imikorere yibicuruzwa bya elegitoronike iragenda yiyongera umunsi kumunsi, kandi ibisabwa kugirango uhindurwe na voltage, kurinda capacitor no kongera ubuzima bwa bateri biragenda biba ngombwa. Ibiranga umuvuduko mwinshi kandi bizigama ingufu za BCD byujuje ibyangombwa bisabwa kugirango bigerweho cyane / bigereranya imbaraga.
Tekinoroji yingenzi ya gahunda ya BCD
Ibikoresho bisanzwe mubikorwa bya BCD birimo voltage nkeya ya CMOS, umuyoboro mwinshi wa MOS, LDMOS hamwe na voltage zitandukanye zisenyuka, vertical NPN / PNP na Schottky diode, nibindi. Inzira zimwe na zimwe zihuza ibikoresho nka JFET na EEPROM, bikavamo ibintu byinshi bitandukanye ibikoresho muri gahunda ya BCD. Kubwibyo, usibye gusuzuma ubwuzuzanye bwibikoresho bikoresha ingufu nyinshi n’ibikoresho bito bito bito, gukanda inshuro ebyiri hamwe na CMOS, nibindi mubishushanyo mbonera, hagomba no gutekerezwa tekinoloji ikwiye yo kwigunga.
Muri tekinoroji ya BCD yo kwigunga, tekinoroji nyinshi nko guhuza imiyoboro, kwigunga no kwigunga kwa dielectric byagaragaye nyuma yizindi. Ikoranabuhanga ryo kwigunga ni ugukora igikoresho kumurongo N-epitaxial layer ya P-substrate hanyuma ugakoresha uburyo bubogamye buranga imiterere ya PN kugirango ugere ku bwigunge, kubera ko ihuriro rya PN rifite imbaraga nyinshi zo guhangana na bias.
Tekinoroji yo kwigunga ni muburyo bwa PN ihuza ryonyine, rishingiye kubiranga bisanzwe bya PN bihuza inkomoko n’amazi yo mu bikoresho hamwe na substrate kugirango bigere ku bwigunge. Iyo umuyoboro wa MOS ufunguye, akarere gakomokamo, akarere ka drain hamwe numuyoboro bizengurutswe nakarere ka depletion, bigatuma habaho kwitandukanya na substrate. Iyo izimye, ihuriro rya PN hagati yakarere ka drain na substrate rirabogamye, kandi voltage nini yakarere kavukire itandukanijwe nakarere ka depletion.
Kwigunga kwa dielectric ikoresha itangazamakuru ryigenga nka okiside ya silicon kugirango igere ku bwigunge. Hashingiwe ku bwigunge bwa dielectric hamwe no kwigunga, kwasi-dielectric kwigunga byakozwe muguhuza ibyiza byombi. Muguhitamo gukoresha tekinoroji yo kwigunga yavuzwe haruguru, guhuza imbaraga nyinshi hamwe na voltage nkeya birashobora kugerwaho.
Icyerekezo cyiterambere cyibikorwa bya BCD
Iterambere rya tekinoroji ya BCD ntabwo rimeze nkibikorwa bisanzwe bya CMOS, byahoze bikurikiza amategeko ya Moore kugirango biteze imbere mubyerekezo byubugari buto kandi byihuta. Inzira ya BCD iratandukanye kandi itezwa imbere mubyerekezo bitatu: voltage nini, imbaraga nyinshi, nubucucike bwinshi.
1. Icyerekezo cyinshi cya BCD icyerekezo
Umuvuduko mwinshi wa BCD urashobora gukora cyane-kwizerwa cyane kumashanyarazi yo kugenzura hamwe na ultra-high-voltage DMOS-urwego rwumuzingi kuri chip imwe icyarimwe, kandi irashobora kumenya umusaruro wibikoresho 500-700V byumuvuduko mwinshi. Nyamara, muri rusange, BCD iracyakenewe kubicuruzwa bifite ibisabwa cyane kubikoresho byamashanyarazi, cyane cyane BJT cyangwa ibikoresho bya DMOS bigezweho, kandi birashobora gukoreshwa mugucunga ingufu mumatara ya elegitoronike no gukoresha inganda.
Ubuhanga bugezweho bwo gukora voltage nyinshi BCD nubuhanga bwa RESURF bwatanzwe na Appel nabandi. muri 1979.Igikoresho gikozwe hifashishijwe epitaxial yoroheje yoroheje kugirango igabanye umurima w'amashanyarazi hejuru, bityo bitezimbere imiterere yo gusenyuka hejuru, kuburyo gusenyuka bibaho mumubiri aho kuba hejuru, bityo bikongerera ingufu za voltage yamashanyarazi. Doping yoroheje nubundi buryo bwo kongera imbaraga za voltage ya BCD. Ikoresha cyane imiyoboro ibiri ikwirakwizwa DDD (Doping Drain ebyiri) hamwe na LDD yoroheje (LD Doping Drain). Mu karere ka DMOS gafite amazi, akarere ka N ubwoko bwa drift kongerwaho kugirango uhindure umubano wambere hagati yumuyoboro wa N + nubwoko bwa P muburyo bwo guhuza imiyoboro ya N- imiyoboro nubwoko bwa P, bityo byongere imbaraga za voltage.
2. Icyerekezo gikomeye-cyerekezo cya BCD
Umuvuduko wa voltage yingufu nyinshi BCD ni 40-90V, kandi ikoreshwa cyane cyane mubikoresho bya elegitoroniki yimodoka bisaba ubushobozi bwo gutwara ibinyabiziga bigezweho, voltage yo hagati hamwe nuburyo bworoshye bwo kugenzura. Ibiranga ibyifuzo byayo ni ubushobozi bwo gutwara ibinyabiziga, imbaraga ziciriritse, kandi kugenzura ibintu akenshi biroroshye.
3. Icyerekezo cyinshi cya BCD icyerekezo
Ubucucike bwinshi bwa BCD, urwego rwa voltage ni 5-50V, hamwe na elegitoroniki yimodoka imwe izagera kuri 70V. Ibikorwa byinshi kandi bigoye kandi bitandukanye birashobora guhuzwa kuri chip imwe. Ubucucike bwinshi BCD ifata ibitekerezo byubushakashatsi kugirango bigere ku bicuruzwa bitandukanye, bikoreshwa cyane cyane mubikoresho bya elegitoroniki.
Porogaramu nyamukuru ya gahunda ya BCD
Inzira ya BCD ikoreshwa cyane mugucunga ingufu (kugenzura ingufu za batiri), kwerekana disiki, ibikoresho bya elegitoroniki, kugenzura inganda, nibindi. Ihuriro ryibikorwa bya BCD hamwe nikoranabuhanga rya SOI nabyo ni ikintu cyingenzi kiranga iterambere rya BCD.
VET-Ubushinwa irashobora gutanga ibice bya grafite, ibyuma bya softrigid, ibice bya karubide ya silicon, cvD ibice bya karubide ya cvD, hamwe na sic / Tac bifatanyirijwe hamwe muminsi 30.
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Igihe cyo kohereza: Nzeri-18-2024