I-Thermal Conductivity Coefficient ye-Copper kuma-PCB

Ithusi lingenye yezinto ezibaluleke kakhulu ekwakhiweni nasekukhiqizweni kwamabhodi wesekethe aphrintiwe ( ama-PCB ), ikakhulukazi ngenxa yezakhiwo zalo ezinhle kakhulu zokushisa kanye nogesi. Esinye sezici ezichazayo zethusi ukuhanjiswa kwayo okuphezulu kokushisa, okudlala indima ebalulekile ekusebenzeni, ekuthembekeni, nasekuphileni isikhathi eside kwama-PCB, ikakhulukazi ekusetshenzisweni kwamandla aphezulu kanye nokushisa okuphezulu.

I-coefficient yokushisa kwethusi, engaba ngu-400 W/m·K ekushiseni kwegumbi, iyenza ibe yinto efanelekile yokususa ukushisa okuvela ezingxenyeni ze-elekthronikhi. Lo mhlahlandlela uzohlola ukuthi i-coefficient yokushisa kwethusi ithinta kanjani ukwakheka kwe-PCB, ukukhiqizwa, kanye nokusetshenziswa kwayo, ngenkathi futhi ihlola izinzuzo zayo, izinselele, kanye nezixazululo zokwenza ngcono ukusebenza kwe-PCB ekuphathweni kokushisa.

I-Thermal Conductivity kanye Nokubaluleka Kwayo kuma-PCB

I-Thermal conductivity yikhono lempahla lokuqhuba ukushisa. Kuyisici esiyinhloko esinquma ukuthi ukushisa kungageleza kahle kangakanani ezintweni uma kungaphansi kwezinga lokushisa. Kuma-PCB, ukunqanyulwa kokushisa okusebenzayo kubalulekile ukuze kugwenywe ukushisa ngokweqile, okungehlisa izinga lokusebenza, kulimaze izingxenye, noma kubangele ukuhluleka okuphelele kwesistimu.

Ukushisa okuphezulu kweCopper kusho ukuthi ingadlulisa kahle ukushisa kude nezingxenye ezikhiqiza amandla amaningi okushisa, njengama-transistors, ama-LED, ama-CPU, namanye amadivaysi azwela ukushisa. Njengoba ukukhiqizwa kokushisa kumishini kagesi kuqhubeka nokwanda ngenxa yokuminyana kwamandla okukhulayo kanye nezici zefomu ezinciphayo, indima yethusi ekulawuleni ukusebenza okushisayo isibaluleke nakakhulu.

Imiqondo Ebalulekile:

• I-Thermal Conductivity Coefficient (k): Lokhu kubhekisela enanini lokushisa elingadluliswa ngempahla. Ngethusi, leli nani lingu-400 W/m·K.
• Ukuqothuka Okushisa: Ukususwa okusebenzayo kokushisa ezingxenyeni ze-elekthronikhi, ngokuyinhloko okwenziwa ithusi kuma-PCB.
• Ukuphathwa Okushisayo: Amasu asetshenziswe ku PCB design ukunciphisa ukwakheka kokushisa nokwandisa ukupholisa.

Iqhaza Lethusi ku-PCB Thermal Management

I-Copper isetshenziswa ngokuyinhloko ngendlela yokulandela umkhondo, i-vias, nezindiza ngaphakathi kwama-PCB, esebenza njengemigudu kagesi nanjengamapayipi ashisayo. Ukuhlelwa kwemikhondo nezindiza zethusi kudlala indima ebalulekile ekulawuleni ukushisa ngaphakathi kwe-PCB, ukukusabalalisa kude nemithombo yokushisa kuya ezindaweni ezipholile noma osinki bokushisa bangaphandle.

Izendlalelo zethusi kuma-PCB

I-PCB ejwayelekile iqukethe izendlalelo eziningi, ithusi lisetshenziswa kakhulu kungqimba lwangaphakathi nangaphandle. Ukuqina kwethusi kanye nendlela ehlelwe ngayo kuthinta ngqo ikhono lebhodi lokuqeda ukushisa. Izendlalelo zethusi eziwugqinsi zingakwazi ukuphatha imithwalo yamanje ephezulu futhi ziphinde zithuthukise ukusebenza kwe-thermal, okuvumela i-PCB ukuthi ilawule ukushisa okwengeziwe.

• Ukuqina Kwethusi Okujwayelekile: Ubukhulu obujwayelekile bekhopha kuma-PCB busuka ku-1 oz/ft² (ubukhulu obungu-35 µm) kuye ku-2 oz/ft² (ubukhulu obungu-70 µm). Kodwa-ke, izinhlelo zokusebenza zamanje kanye nokushisa okuphezulu zingadinga PCB zethusi esindayo, okungaba nogqinsi lwethusi okungu-3 oz/ft² (105 µm) noma ngaphezulu.
• I-Heavy Copper PCBs: Lezi zivame ukusetshenziswa ezinhlelweni zamandla aphezulu lapho ukuphathwa kwe-thermal kubalulekile. Ukuqina kwethusi okwandisiwe kunikeza indawo enkulu yokushisa ukushisa, okuvumela ibhodi ukuthi liphathe amazinga okushisa aphezulu kanye nemithwalo yamandla ngaphandle kokulimaza izingxenye.

Izindiza Zethusi Nemikhondo

Izindiza zethusi, ikakhulukazi izindiza eziphansi nezinamandla, zisebenza njengendawo enkulu engasabalalisa ukushisa kahle kuyo yonke i-PCB. Imikhondo yethusi, exhuma izingxenye ezihlukahlukene, ingabuye iklanywe ngobubanzi obubanzi noma ukushuba okukhulu ukuze kuthuthukiswe amandla abo okubamba ukushisa. Ukulandelela okubanzi kunciphisa ukumelana nokushisa kwethusi, okuvumela ukushisa kugeleze ngokukhululekile.

• Amandla Nezindiza Zaphansi: Lezi zindiza zisebenza njengezisakazi zokushisa, zisakaza amandla ashisayo endaweni yonke ye-PCB futhi zinciphisa izindawo ezishisayo.
• Izindlela Ezibanzi Zokuqeda Ukushisa: Imikhondo ethwala imisinga ephezulu kufanele ibe banzi ngokwanele ukuze kuncishiswe ukumelana nogesi futhi kwandise ukunqanyulwa kokushisa.

Vias for Thermal Management

Ama-vias okushisa angenye isici esibalulekile sendima yethusi ekushabalaleni kokushisa kwe-PCB. Lawa ma-vias, okuyizimbobo ezimbozwe ngethusi ezixhumanisa izendlalelo ezahlukene ze-PCB, avumela ukushisa ukuthi kudlule kusuka kungqimba olungaphezulu kuye ezingqimbeni zethusi zangaphakathi noma ngisho nakwelinye icala lebhodi. Le ndlela iwusizo kakhulu kuma-PCB anezendlalelo eziningi, lapho izendlalelo zethusi zingafakwa khona ukuze kuthuthukiswe ukusabalala kokushisa.

• I-Thermal Vias: Isetshenziselwa ukuxhuma izendlalelo zethusi futhi idlulise ukushisa ngokuqondile nge-PCB.
• Nge-Density: Ukwenyusa inombolo ye-thermal vias ezindaweni ezizwela ukushisa kungathuthukisa kakhulu ukunqanyulwa kokushisa.

Izinselelo Zokuphathwa Kwezifudumezi Ze-Copper

Nakuba izinga eliphezulu le-copper elishisayo linikeza izinzuzo eziningi ekwakhiweni kwe-PCB, kukhona nezinselelo ezimbalwa abaklami okufanele bazizuzise.

Ukulinganisa Idizayini kagesi kanye neThermal

I-Copper isebenza kokubili izinjongo zikagesi nezishisayo ku-PCB, ngakho-ke kungase kube nokuhwebelana phakathi kokuthuthukisa i-PCB ngokusebenza kukagesi kanye nokuphatha okushisayo. Ukwandisa ububanzi bokulandelela ithusi ukuze kukhishwe ukushisa okungcono kungase kuthinte ubuqotho besignali, ikakhulukazi kumasekhethi anesivinini esikhulu lapho ukulawulwa kwe-impedance kubalulekile.

Ukuphatha Izindleko Zethusi

I-Copper ibiza kakhulu uma iqhathaniswa nezinye izinto ezisetshenziswa kuma-PCB, futhi ukwanda kogqinsi lwethusi noma inani lezendlalelo zethusi ebhodini kungakhuphula izindleko zokukhiqiza. Ama-PCB ekhopha esindayo, ikakhulukazi, kubiza kakhulu ukukhiqiza, futhi izimfuneko zezinto ezibonakalayo ezengeziwe zingase zibe nomthelela kusabelomali sisonke sephrojekthi.

Ukunwetshwa Kokushisa kanye Nokucindezeleka Komshini

I-coefficient yokwandisa ukushisa okushisayo kwe-Copper, nakuba iphansi uma iqhathaniswa nezinye izinsimbi, isadinga ukucatshangelwa ekwakhiweni kwe-PCB. Ukungafani emazingeni okunwebeka okushisayo kwethusi kanye nezinto ezingaphansi (ngokujwayelekile i-FR-4) kungabangela ukucindezelwa komshini ngesikhathi sokuhamba kwamabhayisikili, okungase kuholele ekuphikiseni, ukuqhekeka, noma ukubola ngokuhamba kwesikhathi.

• Ukungafani Kokwandiswa Kokushisa Okushisayo: Umehluko kumazinga okunwetshwa phakathi kwethusi ne-PCB substrate material kungabangela ingcindezi ngesikhathi sokuhamba ngebhayisikili okushisayo.
• Ukwethembeka Komshini: Ukuqinisekisa ukwethembeka kokusebenza kwe-PCB ngokuhamba kwesikhathi kudinga ukucatshangelwa ngokucophelela ukuthi izendlalelo zethusi zinwebeka kanjani futhi zinciphe ngokushintsha kwezinga lokushisa.

Ukuthuthukisa Idizayini ye-PCB Yokuphatha Okushisayo Ngokusebenzisa Ithusi

Ukwandisa izinzuzo ze-copper's high thermal conductivity ekwakhiweni kwe-PCB, amasu amaningana angasetshenziswa. Lokhu kufaka phakathi ukusebenzisa izendlalelo zethusi eziminyene, ukuklama imikhondo ebanzi, kanye nokuhlanganisa ama-thermal vias namasinki okushisa. Nazi ezinye izinto ezibalulekile zokucatshangelwa kwedizayini:

Ukwandisa Ukuqina Kwethusi

Njengoba kushiwo ngaphambili, izingqimba zethusi eziqinile zivumela ukuchithwa okungcono kokushisa. Kuzinhlelo zokusebenza ezinamandla amakhulu, kuvamile ukusebenzisa ama-PCB ethusi esindayo ukuze kuthuthukiswe ukuphatha okushisayo. Ukwandisa ukushuba kwethusi akugcini nje ngokuthuthukisa ukuchithwa kokushisa kodwa futhi kuvumela ibhodi ukuthi lithwale imisinga ephakeme ngaphandle kokushisa ngokweqile.

• I-Heavy Copper PCBs: Ifanele izinhlelo zokusebenza ezifana nempahla yamandla, izilawuli zezimoto, nezibani ze-LED, lapho amanani amakhulu okushisa akhiqizwa khona.
• I-Design Trade-offs: Ngenkathi izendlalelo zethusi eziminyene zithuthukisa ukusebenza okushisayo, zingadinga ukulungiswa kumklamo we-PCB ukuze kuhlangatshezwane nogqinsi lwesendlalelo olukhuphukile, olungathinta ubukhulu bebhodi lilonke.

Ukusebenzisa i-Thermal Vias

I-Thermal vias idlala indima ebalulekile ekusabalaliseni ukushisa kuzo zonke izendlalelo ze-PCB eziningi. Ngokuxhuma izindiza zethusi ezendlalelo ezahlukene, lawa ma-vias ahlinzeka ngendlela yokushisa ukuphuma ebusweni bebhodi. Abaklami bangakwazi ukuthuthukisa inombolo nokubekwa kwe-thermal vias ukuze bathuthukise amakhono ebhodi okubamba ukushisa.

• Ukuthuthukisa Ngokubeka: Ukubeka izinto ezishisayo eduze kwezingxenye ezikhiqiza ukushisa kungasiza ukusabalalisa ukushisa ngempumelelo kakhulu ku-PCB yonkana.
• Kugcwaliswe nge-Vias: Kwezinye izimo, i-vias ingagcwaliswa ngezinto zokuqhuba ukuze kuthuthukiswe ukudluliswa kokushisa.

Ukuhlanganisa amaSinki Okushisa kanye Nezisakazeli Zokushisa Zethusi

Kweminye imiklamo, izisakazo zokushisa zethusi noma amasinki okushisa angaphandle asetshenziselwa ukuphatha imithwalo eshisayo. Lezi zingxenye zinganamathiselwa endaweni ye-PCB, okuvumela ukushisa kuhlakazeke kahle endaweni ezungezile.

• Ama-Heat Spreaders: Izindawo ezinkulu zethusi eziklanyelwe ngokuqondile ukuchithwa okushisayo, ngokuvamile ezixhunywe kungqimba yethusi ye-PCB ngokusebenzisa i-thermal vias.
• Amasinki Okushisa Kwangaphandle: Osinki bokushisa abengeziwe abenziwe ngezinto ezinokusebenza okuphezulu kwe-thermal (njenge-aluminium noma ithusi) bangaxhunywa ku-PCB ukuze kudonswe ukushisa kude nezingxenye ezibalulekile.

Ukubekwa Kwengxenye kanye Nokuhlelwa Kwebhodi

Ukubekwa kwengxenye yamasu kanye nesakhiwo se-PCB nakho kungadlala indima ekulawuleni okushisayo. Izingxenye eziphehla ukushisa kufanele zibekwe ezindaweni lapho ukushisa kungachithwa khona kahle, njengaseduze kwezindiza zethusi noma izimbobo ezishisayo. Ukwengeza, ukugcina izingxenye zamandla aphezulu kude nezindawo ezibucayi kusiza ukuvimbela ukushisa ukuthi kuthinte izingxenye ezibalulekile zesekethe.

• I-Component Clustering: Gwema ukuhlanganisa izingxenye zamandla aphezulu ndawonye, ​​​​njengoba lokhu kungadala izindawo ezishisayo zendawo.
• Ukucatshangelwa kokugeleza komoya: Qinisekisa ukuthi isakhiwo se-PCB sivumela ukugeleza komoya okufanele ezingxenyeni ezikhiqiza ukushisa ukuze kube lula ukuqhutshwa kwemvelo noma ukuphoqelelwa.

Izisombululo Zokulawula Okushisayo Ezisebenzisa I-Copper

Ama-elekthronikhi Anamandla : Kuma-elekthronikhi anamandla, ama-PCB kumele abhekane nokushisa okukhulu ngenxa yokugeleza kwamandla aphezulu. Ama-PCB ethusi anamandla, anezendlalelo zethusi eziwugqinsi oluyi-10 oz/ft², asetshenziswa kulezi zinhlelo zokusebenza ukuphatha kokubili umthwalo kagesi kanye nokushisa okuhambisana nawo. Lezi zendlalelo zethusi ezisindayo zisebenza njengabaqhubi kanye nezindlela zokushisa, zivimbela ukushisa ngokweqile. Lobu buchwepheshe bubalulekile kumadivayisi anamandla aphezulu njengezinsiza zikagesi zezimboni, abalawuli bezimoto, kanye nabaguquli, lapho ukuthembeka kokushisa kuyinkinga ebalulekile.

Ama-PCB e-LED : Ama-LED akhiqiza ukushisa okukhulu okumele kuphathwe kahle ukuqinisekisa ukusebenza okuhlala njalo kanye nobude besikhathi. Ama-PCB e-Metal-core (ama-MCPCB), ahlanganisa ungqimba lwethusi olujiyile oluhlanganiswe ne-metal core, avame ukusetshenziswa ezinhlelweni ze-LED. Lo mklamo usiza ukusabalalisa ukushisa kude nama-LED kahle kakhulu kunama-PCB endabuko, ukuvimbela ukuwohloka kokushisa. Ama-MCPCB abaluleke kakhulu ekukhanyeni kwe-LED enamandla amakhulu, lapho ukushabalaliswa kokushisa kubalulekile ekugcineni ukukhanya okukhiphayo kanye nokuqina kwedivayisi.

I-Elektroniki Yezimoto : Izinhlelo zezimoto, ikakhulukazi lezo eziku-powertrain, zidinga ama-PCB angamelana nokushintshashintsha kwezinga lokushisa okukhulu kanye nemisinga ephezulu. Ithusi lidlala indima ebalulekile ekuphathweni kokushisa kulezi zinhlelo zokusebenza, lapho izendlalelo zethusi ezilungiselelwe ukushisa ziqinisekisa ukuthi ukushisa okukhiqizwa ngesikhathi sokusebenza kuhlakazeka ngempumelelo. Lokhu kusiza ukuvimbela ukushisa ngokweqile ezingxenyeni ezifana namayunithi okulawula injini kanye namamojula okusabalalisa amandla, abalulekile ekuthembekeni nasekuphepheni kwemoto.

Izicelo Zemvamisa Ephakeme : Kuma-PCB anemvamisa ephezulu, njengalawo asetshenziswa kumasekethe e-RF nama-microwave, ukuphathwa kokushisa kubalulekile ukuze kugcinwe ubuqotho besiginali. Ukuqhuba kokushisa okuphezulu kwe-Copper kuyivumela ukuthi ikhiphe ukushisa kahle, okubalulekile ekuvimbeleni ukuwohloka kwesiginali okubangelwa ukushisa ngokweqile. Lokhu kubaluleke kakhulu ezinhlelweni zokudlulisa amandla aphezulu, lapho ukugcina amazinga okushisa azinzile kuqinisekisa ukusebenza kahle kanye nokuthembeka kwesikhathi eside.

Isiphetho

I-thermal conductivity coefficient yethusi idlala indima ebalulekile ekwakhiweni nasekusebenzeni kwama-PCB, ikakhulukazi ezinhlelweni ezikhiqiza ukushisa okukhulu. I-Copper ephezulu ye-thermal conductivity ivumela ukuthi ikhiphe ukushisa ngokuphumelelayo, isize ukuvimbela ukwehluleka kwengxenye nokuqinisekisa ubude bebhodi.

Ngokuqonda ukuthi izendlalelo zethusi, imikhondo, i-vias, namasinki okushisa anikela kanjani ekulawuleni okushisayo, abaklami be-PCB bangakwazi ukuthuthukisa izakhiwo zabo kukho kokubili ukusebenza kukagesi nokushisayo. Naphezu kwezinselelo ezithile—ezifana nezindleko zokulinganisa, ukusebenza kukagesi, nokucindezeleka kwemishini—ithusi lihlala liyinto ekhethwayo ekulawuleni okushisayo kuma-PCB.

Njengoba ubuchwepheshe buqhubeka nokuvela, ukubaluleka kwekhopha ekulawuleni ukushisa kumadivayisi anamandla futhi ahlangene kuzokhula kuphela. Ngokuklama okucatshangelwayo nokucatshangelwa ngokucophelela kwezakhiwo ezishisayo zethusi, onjiniyela bangaqhubeka nokuphusha imingcele yokusebenza kwe-PCB kuyilapho begcina ukuphathwa okushisayo okuthembekile.