Amakhono okukhiqiza e-PCB athuthukisiwe, agxile ezintweni ezinembile kakhulu, ezinzima kakhulu, nezikhethekile, akhonza izimboni ezifana nocwaningo lwesayensi, i-RF, ezempi, ezokwelapha, amarobhothi, kanye ne-AI.
I-PCB ye-TG ephezulu
Iyini i-PCB ye-TG ephezulu?
Izinga lokushisa lokuguquka kwengilazi: I-Tg yisifinyezo se-"Glass transition Temperature". Akuyona indawo yokuncibilika kwezinto, kodwa kunalokho yindawo yokushisa ebalulekile lapho i-substrate ye-resin (njenge-epoxy resin) iguquka khona isuka esimweni esiqinile "sengilazi" iye esimweni esithambile nesinwebekayo "esifana nerabha". Ngaphansi kwalesi simo sokushisa, izinto zigcina ukuzinza kobukhulu kanye namandla okusebenza. Ngaphezu kwalesi simo sokushisa, izinto ziqala ukuthamba futhi izakhiwo zazo zokusebenza kanye nezokusebenza kagesi zehla kakhulu.
I-PCB Ephakeme Ye-Tg: Ngokuvamile, ama-substrate e-PCB anenani le-Tg elingu-≥ 150°C achazwa njengezinto ze-Tg eziphezulu. I-Tg ye-FR-4 evamile ngokuvamile icishe ibe ngu-130-140℃.
Izici eziyinhloko
Ukumelana nokushisa okukhulu:
Ingamelana nokushisa okuphezulu kokushisela okungenalo i-lead (ngokuvamile ngaphezu kuka-260℃), futhi isakhiwo se-underlayment sihlala sizinzile ezindaweni ezishisa kakhulu ngaphandle kwezinkinga ezifana nokuhlukanisa noma ukuguquka. Isibonelo, enkambisweni yokushisela, ama-PCB ajwayelekile angathamba futhi ahluleke ngenxa yokushisa okuphezulu, kuyilapho ama-PCB aphezulu e-Tg angadlula ukuhlolwa kwesithando se-tin esingu-288℃ ngaphandle kwezinkinga ezifana nokuqhuma kwebhodi noma ukuhlubuka kwe-copper foil.
Izakhiwo ezizinzile zemishini nezinobukhulu:
I-coefficient of thermal expansion (CTE) iphansi kuneyamapuleti avamile, okunganciphisa ukugoba okubangelwa ukushintsha kwezinga lokushisa futhi kuvimbele ungqimba lwethusi emigodini edlulayo ukuthi lungaqhekeki. Lesi sici sibaluleke kakhulu emabhodini anezingqimba eziningi anezingqimba ezingu-8 noma ngaphezulu, okuqinisekisa ukuthembeka kokuxhumeka kwemigodi edlulayo efakwe.
Izakhiwo zikagesi nezamakhemikhali ezivelele:
Amapuleti amaningi e-Tg aphezulu ane-dielectric constant ephansi (njenge-3.5±0.05@1GHz kwamanye amamodeli aphezulu) kanye nokulahleka kwe-dielectric okuphansi (okuphansi njenge-0.002), okunganciphisa ukuncishiswa kwesignali yemvamisa ephezulu kanye nokukhuluma nge-crosstalk, futhi afanelekela ukudluliselwa kwesignali yesivinini esiphezulu. Ngesikhathi esifanayo, inokumelana okunamandla kwamakhemikhali. Ukusebenza kwayo kuhlala kuphelele ngisho nangemva kokwelashwa okumanzi nokucwiliswa ezixazululweni zamakhemikhali. Ingamelana nezimo ezinomswakama futhi ifanele izimo zokusebenza eziyinkimbinkimbi.
Izinto ezivamile
Amabhodi e-Tg PCBS ephezulu ikakhulukazi ayizinsika ze-resin ezisebenza kahle kakhulu. Amanani e-Tg ezinto ezahlukene ahluka kakhulu, avumelana nezidingo zezimo ezahlukene. Izinhlobo ezivamile yilezi ezilandelayo:
Izinto | Inani le-TG |
I-Rogers RO4350B | 280℃ |
I-Rogers RO4003C | 280℃ |
I-Alon 85N | 250℃ |
Isiqhingi FR408HR | 180℃ |
Weichuang6 | 185℃ |
Izimo ezibalulekile zohlelo lokusebenza
Izinto zikagesi zezimoto:
Uhlelo lwe-BMS lwezimoto ezintsha zamandla, i-ECU engxenyeni yenjini, njll., ivame ukukhiqiza ukushisa okukhulu ngesikhathi sokusebenza. Ama-PCB e-Tg aphezulu angasebenza kahle kule ndawo eshisa kakhulu, okuqinisekisa ukuphepha kokushayela.
I-5G kanye nekhompyutha esebenza kahle kakhulu:
Ama-antenna esiteshi sesisekelo se-5G, amamojula okukhanya, kanye namaseva, amaswishi neminye imishini inezidingo eziphezulu kakhulu zokudluliselwa kwesignali okuvama kakhulu. Isici sokulahlekelwa okuphansi kwamabhodi e-Tg aphezulu singaqinisekisa ubuqotho besignali futhi sithuthukise ukusebenza kahle kokudluliselwa kwedatha.
Imboni yezindiza kanye nezempi:
Imishini efana namabhodi okuxhumana ngesathelayithi kanye namabhodi okulawula i-radar yemvelo e-polar kudingeka imelane nokwehluka okukhulu kwezinga lokushisa okusukela ku--40 ℃ kuya ku-125 ℃. Ama-PCBS asebenzisa ama-substrate afana ne-TG180 angathuthukisa ukubekezelela ukujikeleza kokushisa futhi anciphise amazinga okwehluleka.
Izinto zobuchwepheshe zezokwelapha:
Amadivayisi okuthwebula izithombe nge-ultrasound, imishini yezokwelapha ehlobene nokushisa okuphezulu ehlanjululwe ngamagciwane, athembele ekuzinzeni kwe-Tg PCBS ephezulu ngaphansi kokusebenza kokushisa okuphezulu nesikhathi eside ukuze kugwenywe umthelela wokwehluleka kwemishini ekuxilongweni nasekwelashweni.
Amaphuzu abalulekile enqubo yokukhiqiza
Inqubo yokubopha:
Ngokusebenzisa ijika eliqondile lokucindezela kokushisa kanye nobuchwepheshe be-vacuum lamination, ibhodi liboshelwa ekushiseni okuphezulu okungaba ngu-180℃ futhi ngaphansi kwengcindezi ethile ukuze kususwe amabhamuza omoya, kuthuthukiswe ukuzinza kwe-Z-axis, futhi kuqinisekiswe amandla okubopha phakathi kwezingqimba.
Ukulawula ukubhoboza kanye nokuvimbela:
Ubuchwepheshe bokubhoboza nge-laser busetshenziswa kabanzi, ngokunemba kobubanzi bembobo obungu-±25μm, obufanele ukuxhumeka kwembobo emincane yamabhodi e-HDI anezingqimba eziningi. Ngesikhathi esifanayo, i-impedance kumele ilawulwe ngokuqinile, kanti ukubekezelelana kuvame ukugcinwa ngaphakathi kuka-±5% ukuqinisekisa ukudluliswa kwesignali ngesivinini esikhulu.
Ukwelashwa kwendawo:
Ukuze kuvinjelwe ukungcoliswa kwamanzi ebusweni bamapuleti aphezulu e-Tg, izindlela zokwelapha ubuso ezifana ne-tin plating kanye ne-nickel-gold plating ziyathandwa. Ngaphezu kwalokho, ifasitela elikhulu lemaski ye-solder kufanele livulwe endaweni yephedi ukuze kuthuthukiswe ukunamathelana phakathi kwe-solder kanye nesendlalelo sethusi.
Thumela umbuzo
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