I-Ceramic PCB Surface Finish: Ukuqhathanisa i-ENIG, i-ENEPIG, ne-Silver Plating ukuze usebenze kahle

Isingeniso seCeramic PCB Surface Finish Technologies

Ukuqedwa kwendawo kumelela isici esibalulekile ekukhiqizweni kwe-PCB ye-ceramic , okuthonya ngqo ukushintshwa kwe-solder, ukusebenza kukagesi, kanye nokuthembeka kwesikhathi eside ngaphansi kwezimo ezidinga amandla. Ngokungafani ne-FR-4 substrates evamile, izinto ze-ceramic ezifana ne-aluminium nitride kanye ne-alumina zidinga izindlela ezikhethekile zokwenza insimbi ezingamelana nokujikeleza kokushisa okukhulu, izimpawu zemvamisa ephezulu, kanye nezimo zokusebenza ezinzima.

Ukukhethwa kwendawo efanelekile ye-ceramic PCB kunquma ukuthi ingabe inhlangano yakho izogcina isilawuli se-impedance esizinzile, imelane nokugqwala, futhi inikeze ukusebenza okungaguquki kwe-wire bonding noma kokusoda kukho konke ukuphila kwayo kokusebenza. Izindlela ezintathu zokwelapha ezingaphezulu zibusa imboni: Electroless Nickel Immersion Gold (ENIG), Electroless Nickel Electroless Palladium Immersion Gold (ENEPIG), kanye nesiliva plating.

Lesi sihloko siqhathanisa lezi zinketho zokuqeda i-ceramic PCB kuwo wonke amapharamitha wokusebenza, izidingo zohlelo lokusebenza, nokucatshangelwa kwezindleko, ukuhlinzeka onjiniyela nochwepheshe bokuthengwa kwempahla ngeziqondiso ezisebenzayo zokuthuthukiswa kwezicaciso nokuhlolwa kwabahlinzeki.

Uhlolojikelele lwe-Common Ceramic PCB Surface Finishes

I-ENIG Ceramic PCB Surface Qeda

I-ENIG yakhiwe ungqimba lwe-nickel-phosphorus alloy olunesendlalelo segolide esincane, ngokuvamile olusukela kuma-micrometer angu-3 kuya kwangu-6 e-nickel kanye nama-micrometer angu-0.05 kuya kwangu-0.15 egolide. Lokhu kuqeda kobuso be-PCB ye-ceramic kunikeza ubuso obuthambile obumangalisayo, okwenza bufaneleke kakhulu izingxenye ezincane kanye nokuxhumana okuphezulu.

Isendlalelo segolide sivikela i-nickel engaphansi ekufakweni kwe-oxidation ngesikhathi sokugcinwa ngenkathi sinikeza ukuthengiswa okuhle kakhulu phakathi nezinqubo zokugeleza kabusha. Kodwa-ke, i-ENIG ingathola ukukhubazeka "kwephedi elimnyama" okubangelwa i-hypercorrosion ye-nickel layer ngesikhathi senqubo yokucwiliswa kwegolide, engase ibeke engcupheni ukwethembeka okuhlangene kwe-solder ezindaweni zokukhiqiza ezingalawulwa kahle.

I-ENEPIG Ceramic PCB Surface Finish

I-ENEPIG yethula ungqimba lwe-palladium phakathi kwe-nickel negolide, okudala inqwaba yensimbi ezintathu ebhekana nobuthakathaka obuyinhloko be-ENIG. Isithiyo se-palladium sivimbela ukugqwala kwe-galvanic phakathi kwe-nickel negolide ngenkathi senza kube lula kokubili ukubopha ucingo lwe-aluminium kanye nokukwazi ukubopha ucingo lwegolide kanye nezindlela zokunamathisela i-solder zendabuko.

Lokhu kuqedwa kwe-ceramic PCB kunikeza ukwethembeka okuphakeme kuma-elekthronikhi wezimoto, izinhlelo zokusebenza ze-aerospace, namamojula anamandla aphezulu lapho kungase kudingeke khona ubuchwepheshe bokuxhumana okuningi. Isinyathelo esengeziwe sokubeka i-palladium sinyusa ubunkimbinkimbi benqubo nezindleko zempahla cishe ngamaphesenti angama-30 kuye kwangama-50 uma kuqhathaniswa nokucubungula okujwayelekile kwe-ENIG.

I-Silver Plating Ceramic PCB Surface Finish

Isiliva lokucwiliswa lidala isendlalelo sesiliva esimsulwa esicishe sibe ngama-micrometer angu-0.1 kuya ku-0.4 ngokusabela kokugudluka endaweni yethusi. Lokhu kuqedwa kwe-ceramic PCB surface kuhlinzeka ngokusebenza kukagesi okuvelele nokusebenza okushisayo ngezindleko zempahla ephansi kunezinye izindlela ezisekelwe egolide.

I-Silver plating ihamba phambili ezinhlelweni ezidinga ukulahleka kwesignali okuncane kumafrikhwensi e-microwave kanye nokumelana okuphansi kokuxhumana kwamanethiwekhi okulethwa kwamandla. Umkhawulo oyinhloko uhilela ukuthambekela ekungcoleni ngenxa yenhlanganisela enesibabule emoyeni ozungezile, okudinga izimo zokugcina ezilawulwayo kanye nempilo yeshelufu efushane uma kuqhathaniswa nokuqedwa kwe-ENIG noma kwe-ENEPIG.

Ukuqhathaniswa kokusebenza kwe-Ceramic PCB Surface Finish Options

Ithebula elilandelayo lifingqa izici zokusebenza ezibucayi kubo bonke ubuchwepheshe bokuqeda obuphezulu be-ceramic PCB:

Ukuhlaziywa Kokusebenza Kogesi

I-Silver plating ibonisa ukuhanjiswa okuphezulu kwama-siemens angaba yizigidi ezingu-63 ngemitha, okunciphisa ukulahlekelwa kokufakwa kwezinhlelo zokusebenza ze-PCB ze-ceramic ezisebenza ngaphezu kwe-10 GHz. Izingqimba ze-nickel ku-ENIG kanye ne-ENEPIG zethula imiphumela ye-magnetic loss tangent engonakalisa ubuqotho besignali kumasekethe e-RF abucayi, yize lo mthelela usalokhu ungathandeki ezinhlelweni eziningi ze-electronics zamandla ezisebenza ngaphansi kwe-1 GHz.

Ngemigqa yokudlulisa elawulwa yi-impedance kuma-substrates e-ceramic, i-ENIG ne-ENEPIG ihlinzeka ngezixhumanisi ze-dielectric ezingaguquki ngenxa yokufana kwazo okuphezulu uma kuqhathaniswa nokuqedwa kwesiliva. Lesi sici sibenza babe ukukhetha kokuqedwa kwe-ceramic PCB ye-ceramic yezinhlelo zokusebenza ze-RF ezinembayo ezidinga ukubekezelela okuqinile okungaphansi kwamaphesenti angu-±5.

Mechanical and Bonding Characters

I-ENEPIG izimele yodwa phakathi kwezinketho zokuqedela ze-ceramic PCB ekusekeleni i-golden wire bonding, i-aluminium wire bonding, nokunamathiselwe kwe-solder ngaphakathi komhlangano ofanayo. Lokhu kuguquguquka kufakazela ukuthi kubalulekile kumamojula wamandla we-hybrid ahlanganisa i-silicon carbide die nezingxenye ezijwayelekile ezihlukene.

I-ENIG isekela amajoyinti e-solder athembekile lapho ukukhubazeka kwephedi emnyama kugwenywa ngokulawula inqubo efanele, kuyilapho ukucwenga kwesiliva kunikeza ukuthengiswa okwanele komhlangano ojwayelekile we-SMT kodwa kungenawo amandla ebhondi adingekayo ukuze kunamathiselwe intambo yethusi esindayo ezinhlelweni zamanje.

Ukuzinza Okushisayo Nezemvelo

I-ENEPIG ikhombisa ukumelana okuphezulu kakhulu nokuguga okushisayo kanye nokucekelwa phansi kwemvelo, igcina ukubophela ngemuva kokuchayeka isikhathi eside emazingeni okushisa aphakeme angaphezu kuka-150°C. I-ENIG ihlinzeka ngokuzinza okuhle kokushisayo kwezinhlelo zokusebenza eziningi kodwa ingase ihlangabezane ne-nickel oxidation uma ungqimba lwegolide luqukethe amaphinifa noma i-porosity eyeqile.

I-Silver plating idinga ukuphathwa ngokucophelela nokugcinwa ezindaweni ezihlanzwe nge-nitrogen ukuze kuvinjwe ukungcoliswa, kukhawulelwe ukufaneleka kwayo emibuthanweni enezikhathi zokukhiqiza ezinwetshiwe noma ukuthunyelwa kwenkundla endaweni ebolayo equkethe i-sulphur dioxide noma i-hydrogen sulfide.

Ukufaneleka Kohlelo Lokuqedwa Okuhlukile Kwe-Ceramic PCB Surface

I-ENIG yezicelo ze-High-Frequency

I-ENIG yamukelwa kabanzi kumamojula okuxhumana e-RF, ama-radar front-end, nama-microwave amplifiers adinga i-impedance engaguquki kanye nokuthengiswa kwesikhathi eside. Indawo yayo yegolide ebushelelezi iqinisekisa ukusakazwa kwesignali yemvamisa ephezulu okuthembekile ngaphandle kokwethula ukuhlukahluka kwe-parasitic.

• Excellent impedance ukuzinza - Indawo yegolide eyisicaba neyunifomu igcina ijometri yolayini wokudlulisela engashintshi kumafrikhwensi we-GHz.
• Ukumelana nokugqwala kanye ne-oxidation - Ungqimba lwegolide luvimbela ukuwohloka kwendawo ngisho nangemva kwesitoreji esinwetshiwe noma imijikelezo eminingi yokugeleza kabusha.
• Ukwethembeka komjikelezo oshisayo - Inhlanganisela ye-nickel yangaphansi kanye ne-ceramic substrate imelana nokuphinda kufakwe umthofu ngaphandle kokuncibilika.
• Ukuhambisana okuqinisekisiwe - Isebenza ngempumelelo ngakho kokubili i-alumina ne-aluminium nitride ceramic substrates isebenzisa ifilimu ewugqinsi noma ifilimu encane.

Kafushane, i-ENIG ihlinzeka ngokuqedwa kobuso obuzinzile, obunokunakekelwa okuphansi kwemihlangano ye-PCB ye-ceramic yemvamisa ephezulu edinga ubuqotho besignali obungaguquki kanye namajoyinti athembekile we-solder kuzo zonke izikhawu zokukhiqiza ezihlukahlukene.

I-ENEPIG ye-High-Reliability Power Electronics

I-ENEPIG iyindawo ekhethwayo yokuqeda phezulu ezinhlelweni ezithembeke kakhulu—njengamamojula ezimoto e-IGBT, izilawuli ze-aerospace, namadrayivu ezimoto zezimboni—lapho ukuxhunywa kwezintambo kanye ne-SMT kuhlangana endaweni efanayo yobumba engaphansi.

• Ukuhambisana kwezinqubo eziningi - Isekela kokubili ukugeleza kabusha kwe-solder kanye negolide noma i-aluminium wire bonding endaweni efanayo yephedi.
• Ukuvimbela i-pad emnyama - Isendlalelo se-palladium barrier sivikela isixhumi esibonakalayo se-nickel, siqinisekisa amandla ahlangene angaguquki.
• Ukumelana nokugqwala okuvelele - Imelana nomswakama, izinsalela ze-flux, kanye nokuchayeka kwamakhemikhali ngesikhathi sokusebenza isikhathi eside.
• Ukwethenjwa okuthuthukisiwe kubhayisikili elishisayo - Igcina ukuxhumana okuzinzile ngokusebenzisa izinkulungwane zomjikelezo wamandla, ngisho nangaphansi kwezimo zomthwalo oguquguqukayo.

Sekukonke, i-ENEPIG ilungele amandla kagesi abalulekile adinga ukuxhumana okuqinile kwe-metallurgical nempilo yesevisi eyandisiwe ngaphansi kwengcindezi eshisayo neyemvelo.

I-Silver Plating Yokulethwa Kwamandla Okuzwela Izindleko

I-Silver plating isalokhu iyinketho esebenzayo yabashayeli be-LED, iziguquli ze-photovoltaic, kanye nempahla yamandla omthengi lapho ukuqhutshwa nokusebenza kahle kwezindleko kuyizinto eziza kuqala.

• Ukumelana nogesi okuphansi kakhulu - Ukusebenza okuhle kakhulu kunciphisa ukulahleka kwe-I²R kumathrekhi amanje kanye nama-vias.
• Indlela eshisayo emfishane - Ukugeleza kokushisa okuqondile kusuka ezingxenyeni kuya ku-ceramic substrate kunciphisa amazinga okushisa okuhlangana futhi kuthuthukisa ukusebenza kahle kokupholisa.
• Ukukhetha kwempahla yezomnotho - Izindleko eziphansi ze-plating zenza ukukhiqizwa kwevolumu ephezulu ukonga.
• Ukuzwela kwesikhathi somhlangano - Idinga ukugcinwa okulawulwayo kanye ne-soldering ngesikhathi ukuvimbela ukungcoliswa nokugcina izinga lokumanzisa.

Ngamafuphi, i-silver plating ihlinzeka ngesilinganiso esilinganiselwe sokusebenza nezindleko zezinhlelo zokusebenza zokulethwa kwamandla, okunikeza ukusebenza kahle kwamanje okuphezulu uma kubhangqwe ngokuhlanganisa okuthuthukisiwe nokuphathwa kwezinto.

Ukucatshangelwa Okusebenzayo Kokukhetha Kwe-Ceramic PCB Surface Finish

Ukufanisa Indawo Yokuqedwa kuNqubo Yomhlangano

Ukukhetha kwakho kwe-ceramic PCB surface finish kufanele kuhambisane nezindlela zokuxhuma ezihleliwe. Izinhlelo ezidinga igolide noma i-aluminium ye-wire bonding yokunamathiselwe kwe-dee engenalutho kufanele icacise i-ENEPIG, njengoba i-ENIG noma i-silver plating ihlinzeka ngesibopho esanele salezi zinqubo.

Ama-assemblies asebenzisa ubuchwepheshe obuphezulu kuphela angasebenzisa i-ENIG ngebhalansi yokusebenza nezindleko, kuyilapho ukukhiqizwa kwevolumu ephezulu enenzuzo esheshayo kungase kuthethelele ukucwenga kwesiliva naphezu kwezidingo zakho zokuphatha. Hlola amakhono kazakwethu womhlangano kanye nezilawuli zenqubo ngaphambi kokuphothula imininingwane.

Ukulinganisa Izidingo Zokusebenza Ngokuphikisana Nezindleko

I-ENEPIG iyalela iprimiyamu yamaphesenti angama-30 kuye kwangama-50 ngaphezu kwe-ENIG, yona ngokwayo ebiza cishe amaphesenti angama-20 ngaphezu kokucwecwa kwesiliva kumavolumu okukhiqiza alinganayo. Lo mehluko wezindleko kumele ulinganiswe nezidingo zokufaka isicelo zokwethembeka kwesikhathi eside kanye nokumelana nemvelo.

Imiklamo ye-ceramic ye-PCB enamandla amakhulu esebenza endaweni yezimboni ebolayo ithethelela izindleko ezengeziwe ze-ENEPIG, kuyilapho amanani esibonelo noma imikhiqizo yezinga lomthengi ingase yamukele imikhawulo ye-silver plating ukuze kuncishiswe izindleko zobunjiniyela ezingaphindi ziphindeke kanye nentengo yeyunithi. Cabangela izindleko eziphelele zobunikazi ezihlanganisa izindleko zokuphinda zisebenze kanye namazinga okuhluleka kwenkundla lapho uhlola izinketho zokuqeda i-ceramic PCB.

Ukuqinisekiswa Kwekhwalithi kanye Nokufaneleka Komhlinzeki

Cela idatha yokuqina kwendawo ebonisa amanani e-Ra angaphansi kwama-micrometer angu-0.5 ukuze uthole izinhlelo zokusebenza ezinephimbo elihle, kanye nokuhlaziywa kwezigaba ezihlukene okuqinisekisa ukujiya kongqimba olufanele kanye nokungabikho kwama-void noma amaqhuqhuva. Abahlinzeki be-ceramic PCB surface finish abahlinzeki kufanele banikeze izitifiketi zenqubo ezihlanganisa okuqukethwe kwe-nickel phosphorus kusukela kumaphesenti angu-7 kuya kwangu-9, ubuqotho bongqimba lwe-palladium, nokufana kogqinsi lwesiliva kuzo zonke izindawo zokukhiqiza.

Sungula indlela yokwamukela yokuhlola ukuthi i-solderability ngayinye yezindlela ze-IPC-TM-650 kanye nokuhlolwa kwamandla okudonsa kwebhondi yocingo lapho kusebenza ezimfuneko zakho ezithile zomhlangano. Ukufaneleka okufanele kunciphisa ukwehluleka kwenkambu futhi kuqinisekisa ukusebenza okungaguquki kuwo wonke amaqoqo okukhiqiza.

Okuthathwayo Okubalulekile Kokukhetha Kokuqedwa Kwe-Ceramic PCB Surface

Ukukhetha indawo efanelekile yokuphela kwe-ceramic PCB kudinga ukuhlaziya ngokucophelela izidingo zokusebenza kukagesi, ukuhambisana kwenqubo yokuhlanganisa, izimo zokuchayeka kwemvelo, kanye nemikhawulo yesabelomali. Ubuchwepheshe ngabunye bunikeza izinzuzo ezihlukile:

• ENIG - Ukusebenza okuthembekile kwenhloso ejwayelekile nokwenziwa okuqinisekisiwe kwezinhlelo zokusebenza ezinephimbo elihle nezici zokugcina ezizinzile.
• ENEPIG - Ukuguquguquka okukhulu nokuthembeka kwezinhlelo zokusebenza ezibalulekile zenjongo ezidinga amandla okubopha ngezintambo naphezu kwezindleko eziphezulu zezinto ezibonakalayo.
• Ukufakwa kwesiliva - I-conductivity enhle kakhulu kanye nenani lezinhlelo ezizwelayo izindleko ezinezindawo zokukhiqiza ezilawulwayo kanye namashejuli wokuhlanganisa asheshayo.

Ukukhetha okufanele kwe-ceramic PCB surface finish kuthinta ngqo ukuthembeka komkhiqizo, isivuno sokukhiqiza, kanye nezindleko zokusebenza zesikhathi eside. Cabangela izidingo zakho ezithile zokushisa, ibanga lefrikhwensi yesignali, kanye nokuchayeka kwemvelo lapho wenza lesi sinqumo esibalulekile.

I-Highleap Electronics igxile ekukhiqizweni kwe-PCB ye-ceramic ethuthukisiwe enamakhono aphelele okuqeda ubuso okuhlanganisa i-ENIG, i-ENEPIG, kanye nezinqubo zokufaka isiliva. Ithimba lethu lobunjiniyela lisebenzisana eduze namakhasimende ukuze licacise ukuqeda ubuso be-PCB ye-ceramic okufanele kakhulu kwezicelo zamandla aphezulu kanye ne-RF ezidingakalayo. Xhumana nochwepheshe bethu bezobuchwepheshe ukuze uxoxe ngezidingo zakho ezithile futhi uthole imibhalo eningiliziwe yamandla enqubo yephrojekthi yakho elandelayo ye-ceramic substrate.