I-MCPCB Dielectric Layer: Ungabhalansi Kanjani Ukuqhutshwa Kwe-Thermal kanye Nokufakwa Kagesi

Isingeniso se-MCPCB Dielectric Layer Design

Amabhodi Esifunda Aphrintiwe Nge-Metal Core asebaluleke kakhulu ezinhlelweni zokusebenza zamandla aphezulu ezihlanganisa izinhlelo zokukhanyisa ze-LED, amamojula okuguqulwa kwamandla, kanye ne-elekthronikhi yezimoto lapho ukuphathwa kokushisa kuthinta ngqo ukuthembeka kwedivayisi. Isendlalelo se-dielectric se-MCPCB sisebenza njengesixhumi esibalulekile phakathi kwemigqa yesekethe kanye ne-substrate yensimbi, ngesikhathi esifanayo sinikeza ukuvikelwa kukagesi ngenkathi kusiza ukudluliselwa kokushisa okuphumelelayo kusuka ezingxenyeni kuya epuletini eliyisisekelo.

Lokhu kusebenza okumbaxambili kwenza ukuklanywa kongqimba lwe-dielectric kube yinye yezinto ezibaluleke kakhulu ezinquma ukusebenza kwebhodi kukonke ezinhlelweni ezishisa kakhulu. Inselele ilele ekulinganiseni izidingo ezincintisanayo: izendlalelo ezizacile zithuthukisa ukuqhutshwa kokushisa kodwa ziphazamisa amandla e-dielectric, kuyilapho ukukhethwa kwezinto ezibonakalayo kuthinta kokubili ukwenzeka kokukhiqiza nokwethembeka kwesikhathi eside.

Ukuqonda indlela yokuthuthukisa ukujiya kwengqimba ye-dielectric ye-MCPCB kanye nezinto ezibonakalayo kuvumela onjiniyela ukuthi badizayine amabhodi ahlangabezana nezidingo ezithile ezishisayo nezikagesi ngaphandle kobunjiniyela ngokweqile noma ukwethulwa kwezindleko ezingadingekile.

Imisebenzi esemqoka ye-MCPCB Dielectric Layer

Ukuphathwa Kokusebenza Okushisayo

Isendlalelo se-dielectric sisebenza njengesixhumi esibonakalayo esishisayo esihambisa ukushisa kusuka ku-copper circuitry kuya ku-aluminium noma i-copper base plate. Ukumelana nokushisa ngalesi sendlalelo kulandela isibalo u-R = t/(k·A), lapho u-t emelela ukujiya, u-k ebonisa ukuqhutshwa kwe-thermal, futhi u-A ubonisa indawo enqamula ingxenye.

Lobu budlelwano buveza ukuthi kungani ngisho nokwehluka okuncane ekujikeni kwezingqimba ze-dielectric ze-MCPCB noma ukukhethwa kwezinto kuthinta kakhulu amazinga okushisa e-junction ezingxenyeni zamandla aphezulu. Ezinhlelweni ze-LED ezisebenza ku-3-5 W/cm² heat flux density, ukunciphisa ukumelana nokushisa kwe-dielectric ngo-0.5 °C·cm²/W kunganciphisa amazinga okushisa e-junction ngo-15-25°C, kwandise ngqo isikhathi sokusebenza.

Izidingo Zokuhlukaniswa Kagesi

Ngaphandle kokuphathwa okushisayo, ungqimba lwe-dielectric kufanele lugcine ubuqotho bukagesi ngaphansi kwamandla okusebenza kuyilapho kuvimbela ukuwohloka noma ukulandelela phakathi kokulandela umkhondo wesekethe kanye ne-substrate yensimbi ephansi. Amandla e-Dielectric ngokuvamile asukela ku-2-4 kV ezintweni ezijwayelekile ze-polyimide kuye kwangaphezu kuka-10 kV kuzinhlanganisela ezikhethekile ezigcwaliswe nge-ceramic.

Izicelo ezibandakanya amandla kagesi aphezulu noma izimo zemvelo ezinzima zidinga ukukhethwa kwezinto ngokucophelela ukuze kuqinisekiswe imingcele yokuphepha eyanele. Izinto zokufaka ugesi kufanele futhi zigcine izakhiwo ezizinzile ze-dielectric kulo lonke ibanga lokushisa lokusebenza, lokho ezisetshenziswa zezimoto noma zasezimbonini zingasukela ku -40°C ukuya +150°C.

I-Dielectric Material Selection ye-MCPCB

Common Material Systems

Ukukhethwa kwezinto zokuvikela ezifanele kunquma ngokuyisisekelo izici zokusebenza kwesendlalelo se-dielectric se-MCPCB. Izigaba ezintathu eziyinhloko zezinto zibusa ukukhiqizwa kwebhodi lensimbi eliyinhloko lesimanje :

• I-Standard Polyimide-Based Dielectrics - Nikeza nge-thermal conductivity ye-0.2-0.5 W/mK ehambisana kahle kakhulu nokucubungula kwemishini evamile ye-PCB lamination, ehlinzeka ngokusebenza okwanele kwezicelo zamandla amaphakathi kuyilapho kugcinwa ukusebenza kahle kwezindleko kanye nokukwazi ukukhiqiza.
• Ukwakhiwa Kwepolymer Okuthuthukisiwe - Faka izihlungi ze-ceramic ukuze uzuze ukuguquguquka okushisayo okungu-1-3 W/mK, ukuvala igebe phakathi kwama-polymer ayisisekelo nezinhlelo ezigcwele zobumba kuyilapho ugcina ukuhambisana kokucubungula okunengqondo kanye nesakhiwo sezindleko.
• Izinhlanganisela Ze-Ceramic Ezithuthukisiwe - Izinto ezihlanganisa i-aluminium nitride (AlN) kanye nama-silicon nitride (Si₃N₄) asekelwe ku-dielectrics aletha ukuguquguquka okushisayo kusuka ku-3-8 W/mK, esondela ekusebenzeni kwethusi eliboshwe ngokuqondile kuma-substrates e-ceramic ekusetshenzisweni kokushisa okwedlulele.

Imibandela Yokukhetha Okubalulekile

Ukukhethwa kwezinto zesendlalelo se-dielectric se-MCPCB kudinga ukulinganisela ukuhanjiswa kokushisa ngokumelene namandla e-dielectric, ukuhambisana kokucubungula, kanye nemikhawulo yezindleko. Izinto zokuhanjiswa kokushisa okuphezulu ngokwemvelo zinciphisa ukumelana nokushisa kodwa zingabonisa amandla e-dielectric aphansi ngeyunithi ngayinye ukujiya, okudinga izendlalelo ezijiyile ezivala kancane izinzuzo zokushisa.

Izinto ezifanele zincike ezidingweni ezithile zokuguquguquka kokushisa, ama-voltage okusebenza, izimo zemvelo, kanye nomnotho wevolumu yokukhiqiza. Ukuhambisana kokukhiqiza kudlulela ngalé kokufakwa kwe-lamination kokuqala ukuze kubandakanye ukucatshangelwa kokubhola, umzila, ukuqedwa kwendawo, nezinqubo zokuhlanganisa ezingase zigcizelele ungqimba lwe-dielectric.

I-MCCBB Dielectric Layer Thickness Control

Umthelela Ekusebenzeni Okushisayo Nogesi

Ubukhulu be-Dielectric bulawula ngokuqondile ukumelana nokushisa phakathi kongqimba lwesekethe nesisekelo sensimbi, ngobubanzi obujwayelekile obusuka ku-50-200 μm kuye ngezidingo zohlelo lokusebenza. Ukunciphisa ukujiya kusuka ku-100 μm kuya ku-75 μm kokungu-2 W/mK kunciphisa ukumelana nokushisa ngo-25%, okuhambisana nokwehliswa okuphawulekayo kwezinga lokushisa kwe-junction kumiklamo yamandla aphezulu.

Nokho, ukuncipha kwembuyiselo kwenzeka njengoba ukujiya kusondela imikhawulo yamandla okukhiqiza. Ukucatshangelwa kukagesi kuphoqelela ukujiya okuncane okusekelwe ku-voltage edingekayo yokuphuka kanye nezici zokuphepha.

Isendlalelo se-dielectric esingu-100 μm MCPCB esinamandla e-dielectric angu-3 kV/mm sinikeza umthamo wokuqhekeka ongu-300V, owanele izinhlelo zokusebenza eziningi ze-LED namandla amaphakathi. Imiklamo kagesi ephezulu ingagunyaza ukujiya okungu-150-200 μm nalapho ukusebenza okushisayo kungazuza ekwakhiweni okuncane.

Izindlela Zokuthuthukisa

Ugqinsi lwengqimba ye-dielectric ye-MCPCB efanelekile ivela kumodeli eshisayo ehlanganisa ukuchithwa kwamandla kwangempela, ukwakheka kwengxenye, nezimo ze-ambient ngokumelene nezidingo zikagesi ezichazwe ama-voltage okusebenza namazinga okuphepha. Amandla okukhiqiza asungula isibopho esisebenzayo esiphansi, ngokuvamile esingu-50-75 μm ngezinqubo zokukhiqiza umthamo.

Imikhawulo ephezulu ezungeze u-200-250 μm igcina ukusebenza okushisayo okwamukelekayo kuyilapho ihlinzeka ngamandla e-dielectric eyanele. Ukufana kogqinsi kuphaneli yonkana kuthinta kokubili ukuvumelana okushisayo nokukagesi, ngezilawuli zokukhiqiza eziqondise ukuhlukahluka kogqinsi okungu-±10% ukuze kuqinisekiswe ukusebenza okubikezelwe.

Izinqubo zokucwala ezithuthukisiwe zisebenzisa amasistimu we-prepreg alinganisiwe afinyelela ukubekezelelana okuqinile lapho izidingo zohlelo lokusebenza zithethelela ukulawulwa kwenqubo eyengeziwe. Izinto ezibalulekile zokuthuthukisa ukushuba zihlanganisa:

• Izidingo Zokushisa - Bala ukumelana nokushisa okuphezulu okuvumelekile okusekelwe ekulahlekeni kwamandla engxenye namazinga okushisa okuhlanganisa okuqondiwe, bese unquma imikhawulo yogqinsi yezinto ezikhethiwe ze-dielectric.
• Imikhawulo Yokuphepha Kagesi - Misa ubuncane bokujiya obusekelwe kugesi osebenza kakhulu ophindwe ngezinto ezifanele zokuphepha (imvamisa engu-2-3x) kanye nesilinganiso samandla e-dielectric.
• Ukukhiqiza Ukubekezelelana - I-akhawunti yezinguquko ezingokoqobo zokwenziwa ezinqubweni ze-lamination, iqinisekisa ukuthi amafasitela encazelo amukela ukuhlukahluka okuvamile kokukhiqiza ngaphandle kokuyekethisa ukusebenza.

Ukucatshangelwa Kokukhiqiza Kwezendlalelo Zedijithali ze-MCPCB

Lamination and Processing

Izendlalelo ze-dielectric ezisekelwe kusengaphambili zisebenzisa izinqubo ezijwayelekile ze-PCB lamination ezilungiselelwe izinsimbi zensimbi , ezidinga ingcindezi eguquliwe kanye namaphrofayili okushisa ukuze zivumelane nezici ezahlukene zokunwetshwa kokushisa. Ingaphakathi lensimbi lisebenza njengesinki sokushisa esibalulekile ngesikhathi se-lamination, okudinga izikhathi ezinde zokushisa kanye nokulawula izinga lokushisa okunembile ukuze kufezwe ukugeleza kwe-resin okufanele kanye nokunamathela.

Ukwelapha okungaphelele noma ukubopha okunganele kulimaza kokubili ukudluliswa okushisayo kanye nobuqotho bukagesi bengqimba ye-dielectric ye-MCPCB. I-coefficient of thermal expansion (CTE) ukungafani phakathi kongqimba lwe-dielectric, i-copper circuitry, ne-metal substrate kudala ukucindezeleka komshini ngesikhathi sokuhamba ngebhayisikili okushisayo.

Ukukhethwa kwezinto ezifanele kuqinisekisa ukuhambisana kwe-CTE ngaphakathi kwemikhawulo eyamukelekayo, ngokuvamile eqondise i-dielectric CTE phakathi kuka-5-10 ppm/°C wensimbi eyisisekelo ukuze kuncishiswe ukwehluleka okubangelwa ukucindezeleka phakathi nesikhathi sokuphila sokusebenza.

Ukulawulwa Kwekhwalithi Nokuhlolwa

Ukuqinisekisa ukusebenza okungaguquki kongqimba lwe-dielectric ye-MCPCB kudinga izivumelwano zokuhlola eziphelele kukho konke ukukhiqiza:

• Ukuhlola Amandla e-Dielectric - Ukuhlolwa kwebhodwe eliphezulu kuma-voltage angaphezulu kakhulu kokusebenza okulinganiselwe, ngokuvamile amandla kagesi okusebenza angu-2-3x ukuze kuhlolwe ukukhiqizwa, kuqinisekisa ubuqotho bukagesi futhi kuhlonze okungase kube nokukhubazeka ngaphambi kokuhlanganiswa.
• Ukulinganisa Ukumelana Nokushisa - Imishini yokuhlola i-Thermal impedance iqinisekisa ukusebenza kokudlulisa ukushisa, ukuhlonza ukuhlukahluka kwenqubo noma ukungahambisani kwezinto okungase kuphazamise ukuphathwa kokushisa ekusetshenzisweni kokugcina.
• Ukuhlaziywa kwe-Microsection - Ukuhlolwa okulimazayo kumasampula amele abameli kuqinisekisa ukushuba kwe-dielectric, okuqukethwe okuyize, kanye nekhwalithi yokubopha okuhlanganayo kokufaneleka kwenqubo nokuqapha kwekhwalithi okuqhubekayo kukho konke ukukhiqizwa.

Isiphetho: Ukuthuthukisa Ukusebenza Kwengqimba YeDielectric ye-MCPCB

Idizayini ye-MCPCB ye-dielectric layer esebenzayo idinga indlela ehlelekile elinganisa ukusebenza okushisayo, ukwahlukanisa ugesi, izakhiwo zezinto ezibonakalayo, kanye nezingqinamba zokukhiqiza. Isendlalelo se-dielectric siwukhiye we-thermal bottleneck kuma-PCB angumongo wensimbi, futhi ukuthuthukiswa kwawo kubalulekile ukuze kufinyelelwe izinga lokushisa lengxenye eqondiwe, ukwethembeka kwesistimu, nokuphila isikhathi eside kwedivayisi. Ukucatshangelwa okunjengokukhethwa kwezinto, ukulawula ukushuba, ukufanisa i-CTE, nobuqotho benqubo yokubeka i-lamination kubalulekile ekuqinisekiseni ukusebenza okungaguquki.

Amakhono we-Highleap Electronics:

• Ukukhetha Izinto Ezinembile - Sisiza amakhasimende ukuthi akhethe izinto ze-dielectric ezine-conductivity yokushisa efanele kanye namandla e-dielectric.

• Ukuthuthukisa Ubukhulu - Izinqubo zethu ziqinisekisa ukuthi izendlalelo ze-dielectric ziyahlangabezana nezidingo zokushisa kanye nezikagesi ngaphakathi kokubekezelelana kokukhiqiza.

• Ukulawulwa Kwenqubo Nokuqinisekiswa Kwekhwalithi - Ukunaka i-lamination, ukufaniswa kwe-CTE, kanye nokuhlolwa kokuqinisekisa kuqinisekisa ukusebenza kwebhodi okuthembekile.

• Indlela Yesistimu Ehlanganisiwe - Sicabangela ukusebenza kwezingqimba ze-dielectric kumongo wokwakheka kwe-PCB iyonke, ukukhethwa kwezingxenye, kanye nokwakheka kokushisa.

Uzakwethu ne-Highleap Electronics yokukhiqiza i-MCPCB ngezendlalelo ze-dielectric ezilawulwa ngokunembile, ukuletha amabhodi ahlangabezana nezinhlelo zokusebenza ezishisayo ngenkathi uqinisekisa ukwethembeka kokusebenza kwesikhathi eside.