Indlela Yokuhlanza I-Flux Ku-PCB: Indlela Efanele Yohlobo Ngalunye Lwe-Flux

Ukuhlanza i-flux ebhodini kuzwakala kuyinto encane uze usebenzise i-solvent engafanele ku-residue engafanele bese ugcina une-PCB engcolile, egqwalile, noma engcolile kakhulu. Indlela yokuhlanza i-flux ku-PCB incike ngokuphelele ekutheni iyiphi i-flux esetshenzisiwe, ngoba i-rosin, i-residue encibilikayo emanzini, kanye ne-residue engahlanzekile isabela kumakhemikhali ahlukene ngokuphelele. Lo mhlahlandlela uchaza ukuthi kungani i-residue kufanele iphume kwasekuqaleni, ukuthi ungayibona kanjani i-flux yakho, indlela yesinyathelo ngesinyathelo yohlobo ngalunye, kanye necala elilodwa lapho isinyathelo esihlakaniphile kakhulu ukushiya i-residue yodwa.

1. Kungani Insalela Ye-Flux Kufanele Iphume

I-Flux ikhona ukuze isuse ama-oxide ensimbini ukuze i-solder ikwazi ukuyimanzisa, futhi ukuze yenze lowo msebenzi iyasebenza ngamakhemikhali ekushiseni kokugoqa. Ngemva kokwakheka kwamalunga, okusele ngemuva akuhlali kungenangozi.

Lokho okwenziwa yinsalela ngempela

Kuye ngokuthi i-flux iphuma kanjani, i-residue ingaba yingozi kancane kuya kobudlova , ihlasele kancane ithusi kanye nama-lead. Ngaphansi komswakama kanye nokuthambekela kwayo kungakhula ama-dendrite aqhubayo phakathi kwama-fine-pitch pads, okubangela ukuvuza kanye namaphutha angavamile. Iphazamisa ukuhlolwa kokuhlolwa kwezinzipho , futhi ivimbela ukunamathela kwe-conformal , ngakho-ke i-residue ehlanganisiwe ibamba inkinga unomphela. Kuma-circuits ane-impedance ephezulu, i-high-voltage, kanye ne-RF ngisho ne-residue "engeyinhle" ingashintsha ukusebenza. Yingakho ukuhlanzeka kuyimfuneko echazwe ezindinganisweni zomsebenzi, hhayi ubuhle bobuhle.

Amazinga omsebenzi we-Flux abalulekile njengohlobo

Ama-fluxes ahlukaniswa ngomsebenzi ngaphansi kwe -IPC J-STD-004 — isibonelo i-ROL0/ROL1 (i-rosin, umsebenzi ophansi), i-ORH1 (i-organic, umsebenzi ophezulu), kanye nezimpawu ezifanayo kuyo yonke imindeni ye-rosin, i-organic, kanye ne-inorganic. Uma umsebenzi uphakeme, kulapho ikhemistri yokuhlanza kumele isuswe ngamandla, futhi kungamukeleki kangako ukushiya izinsalela ebhodini. Izinsalela ezingenamsebenzi ophansi zingase zilunge zishiywe zodwa, kuyilapho izinsalela ezinemisebenzi eminingi ebhodini elifanayo zingaba yingozi yokuthembeka — ngakho-ke izinkomba ze-J-STD-004 ze-flux, hhayi nje uhlobo lwazo olubanzi, ziqondisa ukuthi kufanele uzihlanze kanzima kangakanani.

Amakhemistri angenawo uhlanzekile manje abusa ingxenye enkulu yokukhiqizwa kwe-SMT, kodwa izidingo zokuhlanzeka ziyaqina kunokuba ziphumule njengoba amabhodi encipha futhi ekhula - futhi imakethe yokuhlanganisa i-PCB ifinyelele cishe ku-$103.6 billion ngo-2025, iningi lalo lisebenza kahle lapho ukusala phakathi kwabaqhubi abaseduze kungathetheleleki khona.

"Iningi lezinkinga zensimu 'eziyimfihlakalo' ngizilandelela emuva ku-residue — ibhodi elingakaze lihlanzwe ngezinga elidingwa yi-coating noma i-circuit. Ukuhlanzeka kuyisiqinisekiso esishibhile; ukuxosha ukugqwala obekungakuvimbela akusikho."

— unjiniyela wenqubo ye-SMT

2. Yazi i-Flux Yakho Kuqala: I-Rosin, Incibilika Emanzini, Futhi Ayihlanzeki

Isinyathelo esisodwa esibaluleke kakhulu ekuhlanzeni i-flux kwi-PCB ukuhlonza i-flux, ngoba i-residue chemistry ilawula isihlanzi. Ukusebenzisa amanzi ku-rosin residue, noma ukushiya i-residue encibilikayo emanzini evuliwe ebhodini, kokubili kugcina kabi.

Uma ungaqiniseki ukuthi iyiphi i-flux ebhodini, okuzenzakalelayo okuphephile kwejoyinti elifakwe ngesandla noma eliphinde lisetshenziswe kabusha i-flux remover ezinikele noma i-IPA ehlanzekile kakhulu, kanye nokuqonda okucacile komehluko phakathi kwe-solder paste kanye ne-solder flux ukuze wazi ukuthi iyiphi i-residue obhekene nayo.

Indlela yokwazi ukuthi iyiphi i-flux onayo

Umthombo oqondile yi-solder, paste, noma i-flux datasheet, echaza umndeni kanye ne-J-STD-004. Ngokubukeka, i-rosin residue ivame ukuba yi-amber, icwebezela, futhi ibe yi-tack; i-residue encibilikayo emanzini ivame ukuba mhlophe noma icace futhi ijwayelekile emigqeni ephezulu egijima emanzini acwebezelayo; i-no-clean ishiya ifilimu encane, ecacile kakhulu. Uma umlando ungaziwa - i-field return, i-joint ephinde yalungiswa ngesandla, ibhodi elingenalebula - liphathe njengelingase lisebenze futhi lihlanzeke nge-flux remover kunokuqagela ukuthi alinangozi.

3. Indlela Yokuhlanza I-Flux Ku-PCB, Isinyathelo Ngesinyathelo

Indlela engezansi isebenza kuma-rosin kanye nama-residue angahlanzekile ane-IPA noma i-flux remover; ukuze uthole i-flux encibilikayo emanzini, faka i-deionized water wash esikhundleni se-solvent.

Inqubo

1. Cisha amandla bese uvikela. Nqamula ugesi bese ususa noma uvikele izingxenye ezizwela umswakama, amabhethri, kanye nama-relay noma amaswishi angavaliwe.
2. Khetha isihlanzi ngohlobo lokugeleza. I-isopropyl alcohol ehlanzekile kakhulu noma i-flux remover ekhethekile ye-rosin kanye ne-non-clean; amanzi ahlanjululwe (ane-saponifier uma kudingeka) ukuze ancibilike emanzini.
3. Faka isicelo bese uvuselela. Manzisa insalela bese uyisebenza ngebhulashi elithambile elilwa nokungaguquguquki, uhambe uye ohlangothini olulodwa ukuze uphakamise insalela kunokuyigcoba; kusetshenziswa i-ultrasound bath noma uhlelo lokufafaza ukuze kukhiqizwe inani elithile.
4. Hlanza. Hlanza ngamanzi ahlanzekile noma acwengekile ukuze izinsalela ezincibilikisiwe zithathwe, zingaphinde zibekwe njengenkungu.
5. Yomisa ngokuphelele. Yomisa ngomoya ohlanzekile ocindezelwe, futhi lapho kufaneleka khona, bhaka endaweni epholile, ukuze kungabikho umswakama obambeke ngaphansi kwezingxenye.
6. Hlola futhi uqinisekise. Hlola ngaphansi kokukhulisa, futhi uma ubheka amabhodi abalulekile, qinisekisa ukuhlanzeka ngokuhlolwa kwe-ionic (ROSE) noma i-ion-chromatography kunokuba ukwenze ngeso kuphela.

Kuhlanzeke kangakanani “ngokwanele”?

Ukuhlanzeka kuwumphumela olinganisiwe, hhayi isahlulelo seso. Isikrini sendabuko siwukuhlolwa kokungcola kwe-ionic (ROSE), okuncibilikisa izinsalela bese kufundwa inombolo eyodwa elingana ne-sodium-chloride - ngokomlando inombolo yokwamukelwa engaba ngu-1.56 µg/cm². Ngezidingo eziqinile noma zesimanje, i-ion chromatography (IC) ikhomba futhi ilinganise izinhlobo ezithile ze-ionic (ama-chloride, izinsalela ze-acid ezibuthakathaka, njalo njalo) ngokumelene nemikhawulo ye-per-ion, okuyindlela yokuxilonga kakhulu kunenombolo eyodwa ye-ROSE. Amabhodi anokwethenjelwa okuphezulu, noma yini ezogqokwa ngendlela efanayo, kanye nezinhlangano ezincane eziqinile zihlala ekugcineni okuqinile kwale mingcele, ngakho-ke inqubo yokuhlanza ifanelekile ngokumelene nenani umkhiqizo olidingayo ngempela.

4. I-Flux Engahlanzekile: Uma Ungayishiya

I-flux engahlanzekile yakhiwe ukuze i-residue yayo ibe nempilo futhi ingahlala ebhodini, yingakho ithandwa kakhulu — isusa isinyathelo senqubo. Kodwa "i-no-clean" iyisici se-residue, hhayi umthetho, futhi kunezimo lapho kufanele uyihlanze noma kunjalo.

Shiya insalela engahlanzekile uma ukuhlanganiswa kungokwenhloso evamile, insalela incane, futhi akukho lutho oluthintayo. Yihlanze lapho ibhodi linamanethi ane -impedance ephezulu noma ama-voltage aphezulu , i-RF circuitry , isikhala esincane se-fine-pitch, i- conformal coating okufanele ilandelwe (ukunamathela kwama-residue ruins), izidingo eziqinile zokuhlanzeka kwezokwelapha noma kwezindiza , noma imininingwane yobuhle. Iphutha okufanele ligwenywe ukuxuba amakhemikhali — ukuhlanza ingxenye yensalela engahlanzekile nesinyibilikisi esingalungile kungayivula futhi kushiye isiphithiphithi esibi kunokukwenza lutho.

Kukhona futhi ugibe oluncane: insalela engahlanzekile eye yadlula emjikelezweni wesibili wokushisa - ukudlula kabusha noma ukuhlanganiswa - ingasha noma isakazeke, futhi uma isimhlophe futhi ilukhuni kuba nzima ukuyisusa futhi cishe iyoba yinto ebalulekile. Uma ibhodi elingahlanzekile lizophinde lisebenze noma libe ne-conformal coat, hlela ukuhlanza indawo ethintekile nge-flux remover efanayo kunokuthembela ekutheni insalela izohlala ingenangozi ngenqubo engakaze ifanelekele.

5. Ukulawulwa Kokuhlanza Nokuhlanzeka eHighleap

Ngasohlangothini lokukhiqiza, ukuhlanzeka kuwumphumela olawulwayo nolinganiswayo kunokuba kube ukusula. Kwa-Highleap sifanisa inqubo yokuhlanza i-PCB ne-flux chemistry ebhodini — i-solvent noma i-aqueous — siyisebenzise njengesinyathelo esibhaliwe, futhi siqinisekise umphumela ngokuhambisana nezidingo zokuhlanzeka ezindinganisweni ze-IPC J-STD-001 kanye ne-IPC-A-610, okuhlanganisa nokuhlolwa kokuhlanzeka kwe-ionic kwamabhodi ayifunayo. Uma ibhodi liboshelwe ukumbozwa okuvumelanayo, sihlanza ngezinga elidingwa ukumbozwa ukuze linamathele futhi livikele.

Uma umkhiqizo wakho unezidingo zokuhlanzeka, ukumbozwa, noma ukuthembeka — noma ulwa nokwehluleka kwezinsalela ze-flux ensimini — sitshele i-flux kanye nokusetshenziswa kwayo futhi sizokwakha ukuhlanza nokuqinisekisa enkambisweni. Ukuze kulungiswe kabusha futhi kulungiswe, ochwepheshe bethu bahlanza ngezinga elifanayo nokukhiqiza.

Khuluma Nathi Ngezidingo Zokuhlanzeka

6. Indlela Yokuhlanza I-Flux Off kwi-PCB Imibuzo Evame Ukubuzwa

Yini engcono kakhulu yokuhlanza i-flux ku-PCB?

Ku-rosin kanye nezinsalela ezingahlanzekile, i-isopropyl alcohol ehlanzekile kakhulu (90% noma ngaphezulu) noma i-remover ye-flux ezinikele isebenza kahle. Ku-flux encibilikayo emanzini (organic-acid), sebenzisa i-deionized water wash, ngezinye izikhathi ene-saponifier. Isihlanzi esifanele sincike kumakhemikhali e-flux, ngakho-ke thola i-flux kuqala.

Ngingayisebenzisa yini i-isopropyl alcohol ukususa i-flux?

Yebo, kuma-rosin kanye nama-residues angahlanzekile, i-isopropyl alcohol iyisihlanzi esivamile nesisebenzayo, okungcono kakhulu ukuthi isetshenziswe ngobumsulwa obungu-90% noma ngaphezulu ngebhulashi elithambile elilwa nokungaguquguquki. Akuyona inketho efanele yoketshezi oluncibilika emanzini, oludinga ukugezwa ngamanzi ahlanzekile.

Ingabe ngidinga ukuhlanza i-flux engahlanzekile?

Ngokuvamile akukho — insalela engahlanzekile yenzelwe ukuba ibe nempilo futhi ingahlala ezinhlanganweni ezijwayelekile. Yihlanze uma ibhodi linamanethi ane-impedance ephezulu noma ama-voltage aphezulu, i-RF circuitry, i-conformal coating okufanele ilandelwe, izidingo eziqinile zokuhlanzeka kwezokwelapha noma kwezindiza, noma imininingwane yobuhle.

Kungani i-flux residue iyinkinga uma ngiyishiya ivuliwe?

I-rosin esebenzayo kanye nezinsalela ezincibilika emanzini zingaba yingozi futhi zingakhulisa ama-dendrite aqhubayo ngaphansi komswakama kanye nokuthambekela, okubangela ukuvuza kanye namaphutha ngezikhathi ezithile. Izinsalela ziphazamisa nokuhlolwa kukagesi futhi zivimbela ukuhlanganiswa kwe-conformal ukuthi kunamathele, ngakho-ke kufanele zisuswe uma noma yikuphi kwalokhu kubalulekile.

Ngingawuhlanza kanjani umchamo oncibilika emanzini?

Uketshezi oluncibilika emanzini (i-organic-acid) lususwa ngokugeza ngamanzi acwengekile, ngokuvamile nge-saponifier ukusiza ukuluphakamisa, kulandelwe ukuhlanza okuhlanzekile nokomisa kahle. Ungashiyi izinsalela ezincibilika emanzini ebhodini, ngoba lusebenza kakhulu futhi luyabola.

Ngazi kanjani ukuthi ibhodi lihlanzekile ngempela?

Ukuhlolwa okubonakalayo ngaphansi kokukhulisa kubamba insalela enkulu, kodwa kumabhodi abalulekile ukuhlanzeka kuqinisekiswa ngokuhlolwa kwe-ionic contamination (ROSE) noma i-ion chromatography, okulinganisa ukungcola kwe-ionic okusele ngokumelene nomkhawulo ochaziwe kunokuthembela ekubukekeni.

Ngingakwazi yini ukuhlanza i-PCB ngesihlanzi se-ultrasonic?

Yebo, ukuhlanzwa kwe-ultrasonic kuyasebenza futhi kuvame ukukhiqizwa, kodwa kumele kusetshenziswe ngokucophelela emabhodini anezingxenye ezibucayi noma izintambo ezincane zokubopha, njengoba amandla okuvimba angalimaza izingxenye ezibucayi. Amapharamitha enqubo kufanele afanelekele ukuhlanganiswa.