Tukanga BCD

He aha te tukanga BCD?

Ko te tukanga BCD he hangarau tukanga whakauru maramara kotahi i whakaurua tuatahitia e ST i te tau 1986. Ka taea e tēnei hangarau te hanga i ngā taputapu bipolar, CMOS me DMOS i runga i te maramara kotahi. Nā tōna āhua ka tino whakaitihia te horahanga o te maramara.

Ka taea te kī ko te tukanga BCD e whakamahi katoa ana i ngā painga o te kaha taraiwa bipolar, te whakaurunga CMOS teitei me te iti o te whakamahinga hiko, me te kaha rere hiko teitei me te kaha rere o te DMOS. I roto i ēnei, ko te DMOS te mea nui ki te whakapai ake i te mana me te whakaurunga. I te whanaketanga tonu o te hangarau ara iahiko whakauru, kua riro te tukanga BCD hei hangarau hanga matua o te PMIC.

Te hoahoa whakawhiti-wāhanga tukanga BCD, te whatunga pūtake, ngā mihi

Ngā Painga o te Tukanga BCD

Mā te tukanga BCD ka hangaia ngā taputapu Bipolar, ngā taputapu CMOS, me ngā taputapu hiko DMOS ki te maramara kotahi i te wā kotahi, ka whakauruhia te kaha whakawhiti me te kaha taraiwa kawenga kaha o ngā taputapu bipolar me te whakaurunga teitei me te iti o te whakamahinga hiko o te CMOS, kia taea ai e rātou te whakakī tetahi ki tetahi me te whakamahi katoa i ō rātou painga; i te wā kotahi, ka taea e te DMOS te mahi i roto i te aratau whakawhiti me te iti rawa o te whakamahinga hiko. I roto i te poto, ko te iti o te whakamahinga hiko, te pai o te whakamahinga hiko me te whakaurunga teitei tetahi o ngā painga matua o te BCD. Ka taea e te tukanga BCD te whakaiti i te whakamahinga hiko, te whakapai ake i te mahi a te pūnaha me te pai ake o te pono. Kei te piki haere ngā mahi a ngā hua hiko i ia rā, i ia rā, ā, kei te piki haere te hiranga o ngā whakaritenga mō ngā huringa ngaohiko, te tiaki i te pūnga me te roa o te ora o te pākahiko. Ko ngā āhuatanga tere-teitei me te penapena-hiko o te BCD e tutuki ana i ngā whakaritenga tukanga mō ngā maramara whakahaere hiko/anarohiko mahi-teitei.

Ngā hangarau matua o te tukanga BCD

Ko ngā taputapu noa o te tukanga BCD ko te CMOS ngaohiko iti, ngā ngongo MOS ngaohiko teitei, te LDMOS me ngā ngaohiko pakaru rerekē, te NPN/PNP poutū me ngā diode Schottky, me ētahi atu. Ka whakauruhia hoki e ētahi tukanga ngā taputapu pēnei i te JFET me te EEPROM, ka hua ake he whānuitanga o ngā taputapu ki te tukanga BCD. Nō reira, hei tāpiri atu ki te whakaaro ki te hototahitanga o ngā taputapu ngaohiko teitei me ngā taputapu ngaohiko iti, me whai whakaaro hoki ki ngā tukanga pāwhiri-rua me ngā tukanga CMOS, me ētahi atu i roto i te hoahoa, me whai whakaaro hoki ki te hangarau wehewehe tika.

I roto i te hangarau wehewehe BCD, he maha ngā hangarau pēnei i te wehewehe hononga, te wehewehe-whaiaro me te wehewehe dielectric kua puta ake tetahi i muri i tetahi. Ko te hangarau wehewehe hononga ko te hanga i te taputapu ki runga i te paparanga epitaxial momo-N o te papa momo-P me te whakamahi i ngā āhuatanga whakamuri o te hononga PN hei whakatutuki i te wehewehe, nā te mea he tino teitei te ātete o te hononga PN i raro i te whakamuri whakamuri.

Ko te hangarau wehewehe-ā-koe ko te wehewehe hononga PN, e whakawhirinaki ana ki ngā āhuatanga honohono PN tūturu i waenga i ngā rohe pūtake me ngā rohe waikeri o te taputapu me te papa hei whakatutuki i te wehewehenga. Ina tahurihia te ngongo MOS, ka karapotia te rohe pūtake, te rohe waikeri me te awaawa e te rohe mimiti, ka hanga he wehenga mai i te papa. Ina whakawetohia, ka hurihia te hononga PN i waenga i te rohe waikeri me te papa, ā, ka wehea te ngaohiko teitei o te rohe pūtake e te rohe mimiti.

Ka whakamahia e te wehenga hiko-kore ngā mea whakamahana pēnei i te waikura silicon hei whakatutuki i te wehenga. I runga i te wehenga hiko-kore me te wehenga hononga, kua whakawhanakehia te wehenga āhua-hiko-kore mā te whakakotahi i ngā painga o ngā mea e rua. Mā te whiriwhiri i te hangarau wehenga i runga ake nei, ka taea te whakatutuki i te hototahitanga o te ngaohiko-tiketike me te ngaohiko-iti.

Te ahunga whanaketanga o te tukanga BCD

Kāore te whanaketanga o te hangarau tukanga BCD i rite ki te tukanga CMOS paerewa, e whai tonu ana i te ture a Moore kia whanake i te ahunga o te whānui raina iti ake me te tere tere ake. E toru ngā huarahi e rerekē ai te tukanga BCD: te ngaohiko teitei, te mana teitei, me te kiato teitei.

1. Te ahunga BCD ngaohiko-tiketike

Ka taea e te BCD ngaohiko teitei te hanga i ngā ara iahiko whakahaere ngaohiko iti-pono me ngā ara iahiko taumata-DMOS ngaohiko tino-tiketike i runga i te maramara kotahi i te wā kotahi, ā, ka taea te whakatutuki i te hanga o ngā taputapu ngaohiko teitei 500-700V. Heoi, i te nuinga o te wā, he pai tonu te BCD mō ngā hua he nui ngā whakaritenga mō ngā taputapu hiko, inā koa ko ngā taputapu BJT, ngā taputapu DMOS au-tiketike rānei, ā, ka taea te whakamahi mō te whakahaere hiko i roto i ngā tono rama hiko me ngā tono ahumahi.

Ko te hangarau o nāianei mō te hanga BCD ngaohiko-tiketike ko te hangarau RESURF i whakaarohia e Appel et al. i te tau 1979. Ka hangaia te taputapu mā te whakamahi i tētahi paparanga epitaxial kua tāpirihia kia papatahi te tohatoha o te papa hiko o te mata, kia pai ake ai ngā āhuatanga pakaru o te mata, kia puta ai te pakaru i roto i te tinana kaua ki te mata, kia piki ake ai te ngaohiko pakaru o te taputapu. Ko te tāpiri māmā tētahi atu tikanga hei whakanui ake i te ngaohiko pakaru o te BCD. Ko te nuinga o te wā ka whakamahia e ia te DDD (Doping Drain) me te LDD (Doping Drain) kua tāpirihia kia māmā. I roto i te rohe rerenga DMOS, ka tāpirihia he rohe nekeneke momo-N hei whakarerekē i te hononga taketake i waenga i te rerenga N+ me te papa momo-P ki te hononga i waenga i te rerenga N- me te papa momo-P, kia piki ake ai te ngaohiko pakaru.

2. Te ahunga BCD mana-teitei

Ko te whānuitanga ngaohiko o te BCD mana-teitei he 40-90V, ā, e whakamahia ana i roto i ngā hikohiko motuka e hiahia ana ki te kaha taraiwa au nui, te ngaohiko reo me ngā ara iahiko whakahaere māmā. Ko ōna āhuatanga tono ko te kaha taraiwa au nui, te ngaohiko reo, ā, he maha ngā wā he māmā noa te ara iahiko whakahaere.

3. Te ahunga BCD kiato-teitei

He BCD kiato-teitei, ko te awhe ngaohiko he 5-50V, ā, ka eke ētahi hikohiko motuka ki te 70V. Ka taea te whakauru i ngā mahi uaua me te kanorau ki te maramara kotahi. Ka whakamahia e te BCD kiato-teitei ētahi whakaaro hoahoa modular hei whakatutuki i te kanorau hua, e whakamahia ana i roto i ngā tono hikohiko motuka.

Ngā tono matua o te tukanga BCD

E whakamahia whānuitia ana te tukanga BCD i roto i te whakahaere hiko (mana hiko me te pākahiko), te puku whakaatu, ngā hikohiko motuka, te mana ahumahi, me ētahi atu. Ko te maramara whakahaere hiko (PMIC) tētahi o ngā momo maramara anaro nui. Ko te whakakotahitanga o te tukanga BCD me te hangarau SOI he āhuatanga nui anō hoki o te whanaketanga o te tukanga BCD.

Ka taea e VET-China te whakarato i ngā wāhanga karāpeti, te muka ngohengohe mārō, ngā wāhanga silicon carbide, ngā wāhanga silicon carbide CVD, me ngā wāhanga pania sic/Tac i roto i ngā rā 30.
Mena kei te hiahia koe ki ngā hua haurua-ā-ira i runga ake nei, tēnā kaua e mangere ki te whakapiri mai ki a mātou i te wā tuatahi.

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