I-4 Layer ENIG Impedance Control Heavy Copper PCB
Izinyathelo Zokuqaphela Ngomklamo Wobunjiniyela Be-Heavy Copper PCB
Ngokuthuthuka kobuchwepheshe be-elekthronikhi, umthamo we-PCB uya ngokuya uba mncane, ukuminyana kuya ngokuya kuphakeme, futhi izingqimba ze-PCB ziyanda, ngakho-ke, kudinga i-PCB ekuhlelweni okubalulekile, ikhono lokulwa nokuphazamiseka, inqubo kanye nesidingo sokwenziwa siphezulu. nangaphezulu, njengokuqukethwe komklamo wobunjiniyela kakhulu, ikakhulukazi ukukhiqizwa kwe-PCB yethusi esindayo, ukusebenza kahle kobuciko kanye nokuthembeka komklamo wobunjiniyela bomkhiqizo, idinga ukujwayelana nezinga lokuklama futhi ihlangabezane nezidingo zenqubo yokukhiqiza, yenza okuklanyiwe. umkhiqizo ngokushelela.
1. Thuthukisa ukufana nokulinganisa kokubeka ithusi kongqimba lwangaphakathi
(1) Ngenxa yomphumela we-superposition we-solder pad yangaphakathi kanye nomkhawulo wokugeleza kwe-resin, i-PCB yethusi esindayo izoba ugqinsi endaweni enenani lethusi eliphakeme eliyinsalela kunasendaweni enenani lethusi eliyinsalela eliphansi ngemva kokulahlwa, okuholela ekungalinganini. ukujiya kwepuleti futhi kuthinte isichibi nokuhlanganisa okulandelayo.
(2) Ngenxa yokuthi i-PCB yethusi esindayo iwugqinsi, i-CTE yethusi ihluke kakhulu kuleyo ye-substrate, futhi umehluko we-deformation mkhulu ngemva kokucindezela nokushisa.Ungqimba lwangaphakathi lokusatshalaliswa kwethusi alulingani, futhi i-warpage yomkhiqizo kulula ukwenzeka.
Izinkinga ezingenhla zidinga ukuthuthukiswa ekwakhiweni komkhiqizo, esimweni sokungaphazamisi umsebenzi nokusebenza komkhiqizo, ungqimba lwangaphakathi lwendawo engenalutho yethusi ngangokunokwenzeka.Idizayini yephuzu lethusi kanye nebhulokhi yethusi, noma ukushintsha indawo enkulu yethusi ibe yindawo yethusi yokubeka, kwandisa umzila, yenze ukuminyana kwayo kube okufanayo, ukungaguquguquki okuhle, kwenza ukuhlelwa kwebhodi kulingane futhi kube kuhle.
2. Thuthukisa izinga lensalela yethusi yongqimba lwangaphakathi
Ngokukhula kokuqina kwethusi, igebe lomugqa lijulile.Endabeni yezinga elifanayo lokusala kwethusi, inani lokugcwaliswa kwe-resin lidinga ukwanda, ngakho-ke kuyadingeka ukusebenzisa amashidi amaningi aphethwe yi-semi-cured ukuze ahlangabezane nokugcwaliswa kweglue.Uma i-resin incane, kulula ukuholela ekungabikho kwe-glue lamination kanye nokufana kobukhulu bepuleti.
Izinga lethusi eliyinsalela eliphansi lidinga inani elikhulu le-resin ukuze ligcwalise, futhi ukuhamba kwe-resin kunqunyelwe.Ngaphansi kwesenzo sokucindezela, ubukhulu bengqimba ye-dielectric phakathi kwendawo yeshidi lethusi, indawo yomugqa kanye nendawo ye-substrate inomehluko omkhulu (ubukhulu bengqimba ye-dielectric phakathi kwemigqa yi-thinnest), okulula ukuholela kuyo. ukwehluleka kwe-HI-POT.
Ngakho-ke, izinga lokusala kwethusi kufanele lithuthukiswe ngangokunokwenzeka ekwakhiweni kobunjiniyela be-PCB yethusi esindayo, ukuze kuncishiswe isidingo sokugcwaliswa kweglue, kuncishiswe ingozi yokwethenjelwa yokunganeliseki kokugcwalisa iglue kanye nongqimba oluphakathi nendawo.Isibonelo, amaphuzu ethusi kanye ne-copper block design abekwe endaweni yamahhala yethusi.
3. Khulisa ububanzi bomugqa kanye nesikhala somugqa
Kuma-PCB ethusi esindayo, ukwandisa isikhala sobubanzi bomugqa akusizi nje kuphela ukunciphisa ubunzima bokucubungula i-etching, kodwa futhi kunokuthuthukiswa okukhulu ekugcwaliseni iglue laminated.Indwangu yengilazi yefiber egcwalisa isikhala esincane incane, futhi indwangu yengilazi yefiber egcwalisa isikhala esikhulu ingaphezulu.Isikhala esikhulu singanciphisa ingcindezi yokugcwalisa iglue ehlanzekile.
4. Lungiselela ukwakheka kwephedi lesendlalelo sangaphakathi
I-PCB yethusi esindayo, ngenxa yokuthi ubukhulu bethusi bukhulu, kanye ne-superposition yezendlalelo, ithusi belilokhu liwugqinsi olukhulu, lapho ubhoboza, ukungqubuzana kwethuluzi lokubhoboza ebhodini isikhathi eside kulula ukukhiqiza ukuguga kwe-drill. , bese ithinta ikhwalithi yodonga lwembobo, futhi iphinde ithinte ukuthembeka komkhiqizo.Ngakho-ke, esigabeni sokuklama, ungqimba lwangaphakathi lwamaphedi angasebenzi kufanele lwenziwe lube mbalwa ngangokunokwenzeka, futhi akukho ngaphezu kwezingqimba ezi-4 ezinconyiwe.
Uma umklamo uvuma, amaphedi ongqimba angaphakathi kufanele aklanywe abe mkhulu ngangokunokwenzeka.Amaphedi amancane azobangela ukucindezeleka okukhulu ohlelweni lokumba, futhi ijubane lokuqhuba ukushisa liyashesha ekucubunguleni, okulula ukuholela ekuqhekekeni kwe-Angle yethusi kuma-pads.Khulisa ibanga phakathi kwephedi elizimele lesendlalelo sangaphakathi kanye nodonga lwembobo ngendlela umklamo uvumela ngayo.Lokhu kungakhuphula isikhala esiphephile esisebenzayo phakathi kwethusi lembobo kanye nephedi yongqimba yangaphakathi, futhi kunciphise izinkinga ezibangelwa ikhwalithi yodonga lwembobo, njenge-micro-short, ukwehluleka kwe-CAF nokunye.
