Izinselelo Ekwenziweni Kwe-Metal Core PCB kanye Nendlela Yokuzixazulula

Isingeniso

Amabhodi Esekethe Aphrintiwe Ensimbi (ama-MCPCB) asebaluleke kakhulu ekukhanyeni kwe-LED enamandla amakhulu, kuma-elekthronikhi ezimoto, kanye nasezinhlelweni zokuguqula amandla ngenxa yamakhono awo aphezulu okuphatha ukushisa. Kodwa-ke, izinselele zokukhiqiza ze-MCPCB ziveza ubunzima obukhulu obuhlukanisa le nqubo ekwakhiweni okujwayelekile kwe-FR4.

Umehluko oyisisekelo ulele ekuhlanganiseni ukujikeleza kwethusi kuma-substrates ensimbi—imvamisa i-aluminium noma ithusi—ngezendlalelo ezikhethekile ze-dielectric, okudala ubunzima obuhlukile bokushisa, bemishini, kanye nokucubungula. Lezi zinselele zisukela ekungafaniseni kwempahla, izimfuneko eziqinile zokuthi flat, kanye nezindawo ezishisayo ezishisayo lawa mabhodi okumele amelane nazo.

Lesi sihloko sihlola izithiyo eziyinhloko okuhlangatshezwane nazo ngesikhathi sokwenziwa kwe-PCB ewumgogodla wensimbi futhi yethula izixazululo ezisebenzayo zobunjiniyela eziqinisekisa ikhwalithi nokusebenza okungaguquki.

Ukungafani Kokunweba Okushisayo: Inselele Ebalulekile Yokukhiqiza ye-MCPCB

Ukuqonda Inselele

Inselele enkulu yokukhiqiza ye-MCPCB ukuphatha ukungezwani kokwanda okushisayo phakathi kwesisekelo se-aluminium, ucwecwe lwethusi, nongqimba lwe-dielectric. Ama-coefficients awo ahlukene okwanda kwe-thermal (CTE)—cishe i-23 ppm/°C ye-aluminium, i-17 ppm/°C yethusi, kanye ne-30–80 ppm/°C yama-dielectrics—adala ukucindezeleka kwangaphakathi ngesikhathi sokushisa nokupholisa.

Ngesikhathi se-lamination engaphezu kuka-150 °C, lo mehluko we-CTE udala i-delamination, ukuqhekeka kwe-dielectric, noma ukuguqulwa kwebhodi. Ukushisa okusheshayo noma izendlalelo zensimbi eziwugqinsi kuqinisa ingcindezi, kuyilapho ukuhamba ngebhayisikili okushisayo okuphindaphindiwe kancane kancane kwenza ukunamathela kwe-interlayer kube buthaka, okuholela ezinkingeni zokuthembeka zesikhathi eside.

Izixazululo Ezisebenzayo

• Ama-Dielectric Afaniswe ne-CTE – Khetha izinto ze-dielectric ezinenani le-CTE phakathi kwethusi ne-aluminium. Ama-dielectric agcwele i-ceramic anikeza ukunwebeka okulinganiselayo kanye nokushisa okuphezulu (≥2 W/m·K).

• Iphrofayili Yokulayisha Elawulwayo – Sebenzisa irempu yokushisa engu-2–3°C/min enesikhathi esanele sokuhlala ukuze uphumule ukucindezeleka ngaphambi kokupholisa.

• Isilinganiso Sobukhulu Obulinganiselayo – Gcina isilinganiso sobukhulu besisekelo sethusi nesensimbi siphakathi kuka-1:10 no-1:15 ukuze kusatshalaliswe ukucindezeleka ngokulinganayo.

• Umklamo Wesekethe Ehambisanayo - Gcina ukusatshalaliswa kwethusi okulinganiselayo ukuze unciphise ukuguquguquka ngesikhathi sokujikeleza kokushisa.

Lawa maqhinga ahlanganisiwe anciphisa ngempumelelo ukwehluleka okuhlobene ne-CTE futhi athuthukise ukwethembeka kwe-MCPCB.

Ukulawulwa Kwekhasi Lempi ku-MCPCB Izinselele Zokukhiqiza

Inkinga yeWarpage

Ukulawulwa kwamakhasi e-warpage kungenye inselelo ebalulekile yokukhiqiza ye-MCPCB, ikakhulukazi kumabhodi amakhulu kuno-200 mm. Ngisho nokuphambuka okungu-0.5 mm kungathinta ukunemba kokubekwa kwe-SMT futhi kudale izikhala zomoya ezinciphisa ukudluliswa okushisayo kuma-heatsink.

Imiklamo ye-asymmetric enokusabalalisa kwethusi okungalingani phakathi kwezingqimba yimbangela eyinhloko. Uma uhlangothi olulodwa luphethe ukujikeleza okuminyene kanti olunye luhlala lungenalutho, ukushwabana okuhlukile ngesikhathi sokupholisa kuholela ekukhothameni. Ukucindezelwa kwe-lamination okungaguquki noma ukugoba okunganele ekucindezeleni kwe-vacuum kuqhubeza nokwandisa ingcindezi eyinsalela, okuholela ku-warpage ngemva kokupholisa.

Izixazululo Eziphumelelayo

• I-Symmetric Stackup Design - Sebenzisa ukusabalalisa kwethusi okulinganiselwe ezinhlangothini zombili zesendlalelo se-dielectric ukulinganisa amandla okunciphisa ngesikhathi sokucubungula okushisayo.
• Ukunxephezela Amaphethini Ethusi - Ngezakhiwo ezilinganayo, engeza izindawo zethusi ezingasebenzi noma anezikhala ngakolunye uhlangothi ukuze ugcine ibhalansi yesakhiwo.
• Controlled Lamination Pressure - Gcina ukucindezela okungaba ngu-15-25 kg/cm² kanye namazinga okupholisa angaphansi kuka-3 °C/min ukuze uvimbele ukukhiya ukucindezeleka.
• I-Post-Lamination Annealing – Faka i-annealing eqeda ukucindezeleka emazingeni okushisa angu-20–30 °C ngaphansi kwendawo yokushintsha yengilazi ye-dielectric ukuze uthuthukise ukuzinza.
• I-Fixture-Assisted Flattening - Sebenzisa izinto ezilungiswayo lapho ukwelapha okokugcina ukuze uthole ukucaba phakathi kuka-0.3 mm nge-100 mm yobude bebhodi.

Lezi zinyathelo zinciphisa ngempumelelo i-warpage futhi ziqinisekise ukuzinza kwemishini kuyo yonke inqubo yokukhiqiza ye-MCPCB.

I-Lamination kanye ne-Dielectric Integrity ku-MCPCB Manufacturing

Izinselele Zokuqhekeka Kwe-Dielectric

Ukulimala kwe-lamination kanye nokuqhekeka kwe-dielectric yizinselelo ezinkulu zokukhiqiza ze-MCPCB ezithinta kokubili ukuthembeka kokufakelwa kanye nokusebenza kahle kokudlulisa ukushisa. Imifantu ivamise ukuvela eduze konqenqema lwebhodi noma izimbobo, okwenza izindlela ezingaba khona zokuphahlazeka kukagesi.

Ngisho nezindawo ezincane ze-delamination zidala izikhala zomoya ezinokumelana nokushisa okuphindwe izikhathi eziyi-100 kunezifunda eziboshiwe, okubangela izindawo ezishisayo zendawo ezisheshisa ukwehluleka kwengxenye. Izimbangela ezivamile zihlanganisa ukugeleza kwe-resin okungalungile, izinto eziphansi zengilazi ezishintshashintshayo (Tg), noma umswakama obanjwe ngaphakathi kongqimba lwe-dielectric.

Izindlela Zokuvimbela

• High-Tg Dielectrics - Sebenzisa izinto ezine-Tg ngaphezulu kuka-150 °C ukuze ugcine ukuqina kohlangothi futhi umelane nokuhamba ngebhayisikili okushisayo okuphindaphindiwe.
• Optimized Lamination Pressure - Qala ngengcindezi ephansi ukuze ukhuthaze ukugeleza kwe-resin, bese ukhuphuka kancane kancane ube yingcindezi egcwele yokubopha ukunamathela okufanayo.
• Ukubhaka Ngaphambi Kokususa Umswakama - Bhaka amashidi e-dielectric ku-120 ° C amahora angu-2-4 ngaphambi kokucwenga ukuze ukhiphe umswakama owenziwe.
• I-Vacuum-Assisted Lamination - Sebenzisa amasistimu we-vacuum ukususa umoya ovaleleke kanye nokuguquguquka, uqinisekisa ukuhlangana okungenalutho nokusebenza okushisayo okungaguquki.

Lezi zinyathelo zokuvimbela zithuthukisa ukuthembeka kwe-dielectric futhi ziqinisekise ukusebenza okuzinzile kokushisa ekukhiqizeni okuyisisekelo se-PCB yensimbi.

Izinselelo Zokubhoboza kanye Nomzila Ekwenziweni Kwe-MCPCB

Ubunzima bokucubungula imishini

Ubulukhuni kanye nokushisa okuphezulu kwezingxenye zensimbi kudala izinselele ezihlukile zokukhiqiza ze-MCPCB ngesikhathi sokubhoboza nokuhambisa. Izisekelo ze-aluminium ezinenani lobulukhuni be-Brinell elingu-40–80 HB zisheshe ziguge ama-drill bits ajwayelekile e-carbide, okuholela emigodini emikhulu, izindonga eziqinile, kanye nokunamathela okungekuhle kwe-plating.

Ama-burrs ensimbi noma ama-chip akhiqizwa ngesikhathi sokucubungula angabangela ama-short circuits noma aphazamise ukubekwa kwezingxenye. Ngenxa yokuthi i-aluminium nethusi kuqeda ukushisa ngempumelelo , indawo yokusika ihlala iqinile kuyilapho i-drill ishisa ngokungqubuzana, okusheshisa ukuguguleka kwamathuluzi kanye nokungalungi kobukhulu.

Izixazululo Zokubhoboza Ezilungiselelwe

• Amathuluzi Akhethekile Okushayela - Sebenzisa i-polycrystalline diamond (PCD) noma izingcezu ze-carbide ezimboziwe ukuze unwebe impilo yamathuluzi ngo-10–20× uma kuqhathaniswa nezinsimbi ezijwayelekile.
• Amapharamitha Wokubhoboza Alungiselelwe - Isebenza ku-40,000–60,000 RPM ngamanani okuphakelayo angu-50–100 mm/min ukuze ubhalansise ukunemba nokulawula ukugqokwa.
• Izinto Ezifanele Zokusekela - Faka i-phenolic noma aluminium amabhodi okungena nama-backups okungena nokuphuma kwemigodi ehlanzekile.
• Peck Drilling Cycles - Sebenzisa ukugaya ngezikhathi ezithile ukuze usule ama-chips futhi unciphise ukugcwala okushisayo.
• Precision Routing - Khetha izigayo zokugcina zesitayela sokucindezelwa ezinejiyomethri efanelekile yomtshingo ukuze unciphise ukudabuka nokubhoboza.

Lawa maqhinga omshini athuthukisa ikhwalithi yembobo, andise impilo yamathuluzi, futhi aqinisekise ukunemba kobukhulu ekwakhiweni kwe-PCB ewumgogodla wensimbi.

Izinselele Zokwelashwa Kwangaphandle Ekwenziweni Kwe-MCPCB

Izinkinga ze-Oxidation kanye Nokungcola

Izingxenye ze-Metal core zikhipha i-oxidize ngokushesha lapho zivezwe emoyeni, ikakhulukazi ngaphansi kwamazinga okushisa aphakeme okucubungula. I-Aluminium yakha izendlalelo ze-oxide ezivimbela ukumanziswa kwe-solder, kuyilapho ithusi likhiqiza ama-cuprous oxides e-cupric ehlisa ukuthintana kukagesi namandla okubopha. Lezi zinselelo zokukhiqiza ze-MCPCB zidinga ukuvikelwa kwendawo ngokushesha ukuze kugcinwe ukwethembeka komhlangano.

Amasu Okuvikela

• Ukuqedwa Kwendawo Efika Ngesikhathi - Faka izigqoko ezivikelayo ngokushesha ngemva kokwenza ukuvimbela i-oxidation ngesikhathi sokuphatha nokugcina.
• ENIG Qeda - Sebenzisa i-Electroless Nickel Immersion Gold ukuze uthole ukuthengiswa okuhle kakhulu nempilo ende yeshelufu eyedlula izinyanga eziyi-12.
• I-OSP Coating - Khetha i-Organic Solderability Preservatives njengendlela engabizi kakhulu yokuvikela isikhathi esifushane.
• Ukulawulwa Kwenhlanzeko - Hlanza ngamanzi acwebile ukuze ususe izinsalela ze-ionic ezingasheshisa ukugqwala.
• Ukupakishwa kobufakazi bomswakama - Gcina amabhodi emaphaketheni avalwe nge-vacuum ngama-desiccant ukuze uvikeleke ekungeneni kwe-oxidation.

Ukusebenzisa ukuqedwa kwe-post-fabrication okusheshayo kanye nezinqubo ezifanele zokupakisha kuqinisekisa ukuthengiswa okuzinzile nokuthembeka kwesikhathi eside ekukhiqizeni i-PCB ewumgogodla wensimbi.

Ukulawulwa Kwekhwalithi Nokuhlola Ku-MCPCB Manufacturing Challenges

Ukuhlola Izinkimbinkimbi

Ukuhlolwa kwekhwalithi ye-MCPCB kudinga izindlela zokuhlola ezikhethekile ezingaphezu kokuhlolwa okujwayelekile kwe-PCB. Ukuhlolwa kokumelana nokushisa kufanele kuhlole ngokunembile ukudluliswa kokushisa kusuka kungqimba lwesifunda kuya kusisekelo sensimbi ngaphansi kwezimo ezishisayo ezilawulwayo.

Ukuhlolwa kokuqhekeka kwe-Dielectric kuqinisekisa amandla okushisa kuma-voltage angaphezu kwamazinga okusebenza, kuyilapho ukuhlolwa kwesicaba kudinga ukunemba kwezinga le-micron ukuze kuqinisekiswe ukuthintana okushisayo okufanelekile. Lezi zici zenza ukuqinisekiswa kwekhwalithi kube enye yezinselelo ezinkulu zokukhiqiza ze-MCPCB.

Comprehensive Testing Solutions

Ukulawulwa kwekhwalithi okusebenzayo kwe-MCPCB kubandakanya izinqubo eziningi zokuqinisekisa ezihambisanayo:

• Ukuhlola Ukumelana Nokushisa – Qinisekisa ukushisa usebenzisa izinzwa ezilinganisiwe, ugcine amanani ngokuvamile angaphansi kuka-1 °C/W kumadizayini ajwayelekile.
• Ukuhlola Okunamandla Kakhulu - Faka isicelo se-2500-3000 VAC ukuze uqinisekise ubuqotho be-dielectric kanye nokuthembeka kokufakwa.
• I-infrared Thermal Imaging - Thola izindawo ezishisayo ezibonisa ukudluliswa okushisayo okungalungile noma okufihliwe okudidayo kwesekethe.
• Ukuhlolwa kwe-AOI okusekelwe ku-Laser - Kala ukucaba kwendawo ngokunemba okuphezulu ukuhlonza i-warpage ngaphambi kokuhlanganisa.

Ukusebenzisa ukulawulwa kwenqubo yezibalo ngesampula evamile kugcina ukuqina komkhiqizo futhi kuqinisekisa ukusebenza okungaguquki kuzo zonke izigaba zokukhiqiza ze-MCPCB.

Isiphetho

Ukunqoba izinselele zokukhiqiza ze-MCPCB—kusuka kokungafani kokwanda kokushisa nokulawula ikhasi le-warpage ukuya ekunembeni kokumba nokuvikelwa kwendawo—kudinga indlela yobunjiniyela ephelele. Impumelelo incike ekuqondiseni ukukhethwa kwezinto, ukuthuthukiswa kwenqubo, nokulawulwa kwekhwalithi ukuze kuqinisekiswe ukusebenza okuzinzile kwe-thermal nokuthembeka kwesikhathi eside ezinhlelweni zamandla aphezulu.

Kungani Khetha i-Highleap Electronics

• Ubunjiniyela Bezinto Ezithuthukile - I-aluminium ehlanganisiwe, ithusi, kanye nezinketho ze-dielectric ukuze kusebenze ukulinganisa okushisayo nokwemishini.
• Ukunemba Kwenqubo Yokulawula - I-lamination elungiselelwe, ukubhoboza, kanye nemingcele yomzila ukuze kube flatness ephakeme kanye nokunemba kobukhulu.
• Ukuqinisekiswa Kwekhwalithi Okuphelele - Ukumelana nokushisa kwangaphakathi kwendlu, i-dielectric, kanye nokuhlolwa kwe-flatness ukuze kuqinisekiswe yonke iqoqo lokukhiqiza.
• Uchwepheshe Besicelo - Ukusebenza okuqinisekisiwe kuzo zonke izibani ze-LED, izinhlelo zezimoto, nezimboni zokuguqula amandla.

Bambisana ne-Highleap Electronics ukuze ufinyelele izixazululo zokukhiqiza ze-MCPCB ezilungiselelwe ukusebenza kahle, ukuthembeka, kanye nokukhula. Xhumana nethimba lethu lobuchwepheshe namuhla ukuze uxoxe ngezidingo zakho zephrojekthi enamandla amakhulu.