Izinsizakalo Zokubumba Amabhodwe e-PCB: Imithetho Yokuhlanganiswa, Inqubo, kanye Nokuklama

Ukufaka i-PCB ebhodweni kuhlanganisa ibhodi elihlanganisiwe (noma isixhumi noma imojuli) ebhulokini eliqinile le-resin, kulivala ngokuphelele ekuswakameni, ekudlidlizeni, kumakhemikhali nasekuphazamisekeni. Luhlobo oluqinile kakhulu lokuvikela i-elekthronikhi — oluqinile kakhulu kunengubo encane — kodwa lunezela isisindo, izindleko, futhi lwenza ibhodi lingalungiseki, ngakho-ke lisetshenziswa lapho imvelo ikufuna khona. Lo mhlahlandlela uchaza ukuthi yini ukufaka i-potting, ukuthi ihluke kanjani embozweni ohambisanayo, ama-resin avamile kanye nokushintshana kwawo, nokuthi i-Highleap Electronics inikeza kanjani ukufaka i-potting njengengxenye yokuhlanganiswa.

1. Kuyini ukubhoboza nge-PCB futhi kuvikelani?

Ukufaka i-PCB ebhodweni inqubo yokugcwalisa indawo ebiyelwe noma isikhunta esizungeze ibhodi elihlanganisiwe nge-resin ewuketshezi ephola ibe yinqwaba eqinile, imboze ngokuphelele izinto zikagesi. Ivikela ekungeneni komswakama kanye namanzi, ukushaqeka komshini kanye nokudlidliza, uthuli, amakhemikhali anamandla, ukujikeleza kokushisa, kanye nobunjiniyela obubuyela emuva noma ukuphazanyiswa — uphawu oluphelele kakhulu kunesembozo somphezulu ngoba izingxenye zifakwe ezintweni eziqinile kunokuba zimbozwe nje.

Lokho kuvinjelwa okuphelele yingakho ukubhoda kukhethwa ngezinhlelo zokusebenza ezinzima kakhulu: amamojula ezimoto nezimboni, izinto zikagesi zangaphandle nezasolwandle, izinsiza zikagesi, nanoma yini evinjezelwa njalo noma ecwiliswa emanzini. Umgomo ofanayo - ukugcina imvelo ingangeni - uphinde uqhubekisele phambili umklamo we-PCB ongangeni manzi ngokuphelele , lapho ukubhoda ngokuvamile kuyisinyathelo esinqumayo. Izinto ezishintshayo isisindo, izindleko ezengeziwe, ezinye izinto ezicatshangelwayo ngokushisa, kanye neqiniso lokuthi ibhodi elibhodwe ngokuvamile alikwazi ukulungiswa, yingakho ukubhoda kugcinelwe imikhiqizo eyidinga ngempela.

2. Ukufakwa kwe-PCB ebhodweni vs ukugqoka okunesimo esifana nesakho: yikuphi okudingayo?

Khetha i-conformal coating yokuvikela umswakama ojwayelekile kanye nokungcola ngesisindo esiphansi kanye nezindleko eziphansi, kanye nokufaka imbiza lapho ibhodi libhekene nokucwiliswa emanzini, ukudlidliza okukhulu, noma amakhemikhali anamandla futhi lidinga ukuqina okuphezulu. Lokhu kokubili kuvikela ezinsongweni ezihambisanayo kodwa kuhluke kakhulu ngezinga:

Kwabaningi abasebenza ngogesi bangaphakathi nabathengi, i- conformal coating iyizinga elifanele nelingabizi lokuvikela. Ukufaka imbiza kuthola isisindo kanye nezindleko kuphela uma ukusetshenziswa kwayo kunzima ngempela - ukucwiliswa, ukushaqeka okuqhubekayo, ukuchayeka kumakhemikhali, noma isidingo sokufihla isekethe. Umthetho owusizo: uma ifilimu encane ingasinda endaweni ezungezile, yimboze; uma ibhodi kumele livalwe ngezinto eziqinile ukuze lisinde, yimboze.

3. Izithako zokubhaka: i-epoxy, i-polyurethane, ne-silicone

Izinhlanganisela ezintathu eziyinhloko zokubhaka amabhodwe yi-epoxy (eqinile kakhulu futhi emelana namakhemikhali amaningi futhi engaphazanyiswa), i-polyurethane (eqinile kodwa eguquguqukayo kakhudlwana, enhle ekudlidlizeni), kanye ne-silicone (ethambile, eguquguqukayo, futhi engcono kakhulu emazingeni okushisa abanzi kanye nokucindezeleka kokushisa). Ukukhetha i-resin ukulinganisela kobulukhuni, ukuguquguquka, izinga lokushisa, kanye nokuziphatha kokushisa:

• I-Epoxy iyelapha futhi ibophe ngokuqinile, inikeza ukumelana kwamakhemikhali okungcono kakhulu kanye nesithiyo esiqine kakhulu ekuphazamisekeni — kodwa ukuqina kwayo kudlulisa ukucindezeleka kokushisa, ngakho-ke ifanela ukusetshenziswa kwezinga lokushisa elizinzile.
• polyurethane iqinile kodwa inwebeka kakhulu kune-epoxy, imunca kahle ukudlidliza kanye nokushaqeka komshini, okwenza kube ukukhetha okuvamile kwemishini ehambayo noma eqinile.
• Silicone ihlala ithambile futhi iguquguquka emazingeni okushisa abanzi kakhulu, inciphisa ukucindezeleka kokukhula kokushisa ezingxenyeni, futhi iyathandwa kakhulu ezihlanganisweni ezishisa kakhulu noma eziqhutshwa ngokushisa.

Ngenxa yokuthi i-resin yakhelwe ngqo ekuhlanganisweni, ihlobene kakhulu nezinto ze -PCB epoxy resin ezisetshenziswa ekufakweni kwe-capsulation ngokuvamile, futhi efanele incike ekushiseni okusebenzayo, indawo yokusebenza, nokuthi ukushabalaliswa kokushisa nge-potting kubalulekile yini ebhodini lakho.

4. Indlela yokuklama ibhodi lokubhaka izimbiza

Yakha ibhodi lokufaka izimbiza ngokubala isisindo se-resin kanye nokukhula kokushisa, ugweme amaphakethe omoya avalelekile, uvikele izixhumi nezingxenye ezilungisekayo okumele zihlale zifinyeleleka, kanye nokulawula ukushisa okuvela ezingxenyeni zamandla ezifakwe ku-resin. Ukufaka izimbiza kushintsha ukuziphatha komshini nokushisa kwenhlangano, ngakho-ke kufanele kuhlelwe ekwakhiweni kunokuba kwengezwe ngokungacabangi. Izinto ezibalulekile okufanele uzicabangele:

• Ukucindezeleka kokukhula kokushisa. Ukwanda nokufinyela kwe-resin eqinile kungacindezela amalunga nezingxenye ze-solder, ngakho-ke ukubekwa kwezingxenye kanye nokukhetha i-resin kumele kuhambisane nobubanzi bokushisa.
• Ukuvalelwa komoya. Izingxenye ezinde kanye nezikhala eziqinile zingabamba izikhala zomoya ngesikhathi sokuthulula; ukwakheka kanye nokukhipha igesi (ngokuvamile ukuhlanza nge-vacuum potting) kuvimbela izikhala ezibuthakathaka isivalo.
• Izindawo zokugcina ngaphandle. Izixhumi, izindawo zokuhlola, kanye nezingxenye ezilungisekayo okumele zihlale zisebenziseka zidinga ukufihla noma ukuhlala ngaphandle kwendawo efakwe ebhodweni.
• Ukushabalalisa ukushisa. Izingxenye zamandla ezifakwe ku-resin zilahlekelwa ukupholisa komoya, ngakho-ke ukuhanjiswa kokushisa kwe-resin kanye nomklamo wokushisa webhodi kumele kubhekane nakho.

Lezi yizona kanye izinhlobo zezinkinga ezivezwa ukubuyekezwa kokukhiqiza kusenesikhathi, ngendlela efanayo nokubuyekezwa kokwenziwa kwangaphambi kokwakhiwa okubamba ngayo izingozi zokuhlanganiswa ngaphambi kokuba zifike ekukhiqizweni - okushibhile kakhulu ukuzixazulula ekwakhiweni kunangemva kokuba ibhodi livalwe nge-resin.

5. Inqubo yokufaka izimbiza ze-PCB isinyathelo ngesinyathelo

Inqubo yokufaka izimbiza ihamba ngezinyathelo ezinhlanu: lungisa futhi uvale ibhodi, hlanganisa i-resin enezingxenye ezimbili ngesilinganiso esifanele, uyifake endaweni evalekile noma esikhumbeni, susa umoya ovalelekile ngokususa igesi nge-vacuum, bese uyilungisa ibe yinto eqinile. Isinyathelo ngasinye sinemodi yokwehluleka enquma ukuthi ukufakwa okuqediwe kuyalivikela ngempela ibhodi, yingakho ukufaka izimbiza kuyinqubo elawulwayo kunokuthulula nje i-resin:

• Lungisa bese ufihla imaski. Ibhodi liyahlanzwa ukuze i-resin ibophe kahle, futhi noma yiziphi izixhumi, izindawo zokuhlola, noma izingxenye ezilungisekayo okumele zihlale zifinyeleleka ziyavalwa ngaphambi kokufakwa ebhodweni.
• Hlanganisa ngesilinganiso. Iningi lamakhemikhali okubhaka izimbiza yizinhlelo ezinezingxenye ezimbili okumele zixutshwe ngesilinganiso esiqondile futhi zixutshwe kahle; ibhetshi elingekho esilinganisweni noma elixutshwe kabi lingase lingaphinde lilapheke ngokuphelele noma lingase lilapheke ngamabala abuthakathaka.
• Khipha. I-resin ithululwa noma ipompelwe endaweni ebiyelwe noma isikhunta esizungeze ibhodi, igcwalisa ivolumu ngaphandle kokuphazamisa izingxenye.
• I-vacuum degas. I-assembly ifakwa ngaphansi kwe-vacuum ukuze ikhiphe umoya ovalelekile ku-resin ewuketshezi futhi iphume ngaphansi kwezingxenye eziphansi ezimile, njengoba izikhala zomoya zenza buthaka isivalo futhi zidale izindlela zokushisa nezokungena komswakama.
• Ukwelapha. I-resin iyaqina — ekushiseni kwegumbi noma ngokushisa kuye ngokuthi ihlanganiswe kanjani — yakha ibhlogo lokugcina eliqinile. Isheduli yokwelapha ithinta izakhiwo ze-resin zomshini nezokushisa.

Ukususa igesi nge-vacuum kuyisinyathelo esivame ukunganakwa: ngaphandle kwaso, amaphakethe omoya avalelekile ngesikhathi sokuthulula ashiya izikhala ezibeka engcupheni ukuvikelwa okufanele kunikezwe yi-pot. I-resin ekhethiwe yalezi zinyathelo ihlobene eduze nezinhlelo ze -resin ze-epoxy ezisetshenziswa ekufakweni kwe-capsulation, futhi emikhiqizweni lapho ukucwiliswa okuphelele kuyinhloso, inqubo iyingxenye ebalulekile yokwakha i -PCB engangeni manzi.

6. Indlela Yokugqamisa Nokuvikela Amabhodwe Akho

I-Highleap inikeza ukubhodwela kanye nokumbozwa njengengxenye yokuhlanganiswa, ukukhetha i-resin kanye nenqubo ehambisana nendawo yakho futhi kuvikela izindawo okumele zihlale zifinyeleleka. Ngokumbozwa kwe-PCB , amabhodi avalwa nge-epoxy, i-polyurethane, noma i-silicone compound efanele, kugxilwe kakhulu ezindaweni ezingenalutho, ukucindezeleka kokushisa, kanye nokugcinwa kwezixhumi.

Ngenxa yokuthi ukufaka amabhodwe kuyisinyathelo sokugcina sokuvikela phezu kwebhodi elakhiwe, i-Highleap iyiletha ngaphakathi kokuhlanganiswa kwe-turnkey - ngakho-ke ibhodi liyakhiwa, ligcwaliswe, lihlolwe, bese lifakwa emabhodweni njengokugeleza okukodwa okuhlanganisiwe, futhi imikhiqizo elula ingathola ukugqoka okuvumelanayo lapho kusezingeni elifanele. Uma ucela ikhotheshini, chaza indawo yokusebenza (ukucwiliswa, ukudlidliza, izinga lokushisa, ukuchayeka kwamakhemikhali), ukuthi yiziphi izindawo okumele zihlale zifinyeleleka, kanye nanoma yikuphi ukushabalaliswa kokushisa okudingekayo ukuze kukhethwe inhlanganisela efanele kanye nenqubo.

7. Imibuzo Evame Ukubuzwa Ngokuphathelene Nokubhodwela Kwe-PCB

Kubiza malini ukubhaka i-PCB?

Ukufaka imbiza kwengeza izindleko ezivela ezintweni ze-resin, umsebenzi kanye nemishini yokuxuba, ukukhipha, kanye nokukhipha igesi nge-vacuum, kanye nesikhathi sokulungisa, ngakho-ke izindleko zeyunithi ngayinye ziyakhuphuka ngosayizi webhodi kanye nomthamo we-resin. Kuyonga kakhulu uma kuklanywe ekuhlanganisweni futhi kusetshenziswa ngamaqembu kunokuba kufakwe njengento yokucabanga eyodwa kamuva.

Ingabe ukufaka izimbiza kuyafana nokufaka i-encapsulation?

La magama asetshenziswa ngokushintshana emisebenzini eminingi ye-elekthronikhi — womabili asho ukufaka ibhodi nge-resin elungisiwe. Empeleni, elithi “ukubumba” lisho ukuthela i-resin endlini ehlala emkhiqizweni, kuyilapho elithi “ukubumba” lingasho umzimba we-resin obunjiwe, kodwa inqubo nezinto zokwakha ziyafana.

Ingabe ingxube yembiza ingasuswa ukuze ilungiswe?

Ukufakwa kwe-epoxy okuqinile kuhlala njalo futhi akukwazi ukususwa ngaphandle kokubhubhisa ibhodi; i-silicone ethambile kanye nezinye izinto ezihlanganisiwe ze-polyurethane ngezinye izikhathi kungasikwa noma kumbiwe ukuze kulungiswe kabusha okulinganiselwe, kodwa ukufakwa kwe-potting ngokuvamile kukhethwa imikhiqizo engeke ilungiswe.

Ingabe ukubhodwela izimbiza kubangela ukuthi izingxenye zishise ngokweqile?

Kungakwenza, ngoba ukufaka izingxenye ku-resin kususa ukupholisa komoya. Isixazululo ukusebenzisa i-potting compound ehambisa ukushisa noma ukuklama izindlela zokushisa eziya endlini, ngakho izingxenye zamandla zikhipha ukushisa nge-resin kunokuba zikwakhe ngaphakathi.

Yisiphi isilinganiso se-IP esingafinyelelwa yi-PCB ebhodweni?

Ibhodi elifakwe kahle ebhodweni elinezintambo ezivaliwe lingafinyelela amazinga aphezulu okuvikela ukungena okuhlanganisa nezilinganiso ezigcwele zokuvimbela uthuli kanye nokucwiliswa, yingakho ukubhaka ebhodweni kuvamile kuma-electronics angaphandle, asolwandle, kanye nawagqitshwe. Isilinganiso esifinyelelwe sincike esibayeni, uphawu ezixhumini, kanye nokubhaka ebhodweni okungenalutho.

Kuthatha isikhathi esingakanani ukuphola ebhodweni?

Isikhathi sokwelapha sincike ekwakhiweni kanye nendlela, kusukela emahoreni ambalwa ukuze kutholakale ama-epoxies aphekwe ngokushisa kuya osukwini noma ngaphezulu kwezinye izinhlelo zokushisa kwegumbi. Uhlelo lokwelapha luthinta ubulukhuni bokugcina be-resin kanye nokuziphatha kokushisa, ngakho-ke luhambisana nokusetshenziswa kunokuba lusheshe.