Quick Turn pcb surface treatment HASL LF RoHS

Inqubo ye-HASL yebhodi lesifunda ngokuvamile ibhekisela kunqubo ye-pad HASL, okuwukuthi ukugqoka ithini endaweni ye-pad ebusweni bebhodi lesifunda.Ingadlala indima ye-anti-corrosion kanye ne-anti-oxidation, futhi ingaphinda ikhulise indawo yokuxhumana phakathi kwephedi nedivayisi edayisiwe, futhi ithuthukise ukuthembeka kwe-soldering.Ukugeleza kwenqubo ethile kuhlanganisa izinyathelo eziningi ezinjengokuhlanza, ukufakwa kwamakhemikhali kathayela, ukucwiliswa emanzini, nokuwasha.Khona-ke, ngenqubo efana ne-hot soldering, izosabela ukwakha isibopho phakathi kwe-tin kanye nedivaysi ye-splice.Ukufafaza ngamathini kumabhodi esekethe kuyinqubo esetshenziswa kakhulu futhi isetshenziswa kakhulu embonini yokukhiqiza ugesi.

I-HASL eholayo kanye ne-HASL engenamthofu ubuchwepheshe obubili bokwelapha obungaphezulu obusetshenziswa kakhulukazi ukuvikela izingxenye zensimbi zamabhodi esekethe ekutheni zingagqwali kanye ne-oxidation.Phakathi kwazo, ukwakheka kwe-HASL yomthofu yakhiwe ngamathini angama-63% kanye nokuhola okungu-37%, kuyilapho i-HASL engenamthofu yakhiwa ithini, ithusi nezinye izakhi (njengesiliva, i-nickel, i-antimony, njll.).Uma kuqhathaniswa ne-HASL esekelwe kumthofu, umehluko phakathi kwe-HASL engenawo umthofu ukuthi ihambisana kakhulu nemvelo, ngoba umthofu uyinto eyingozi ebeka imvelo nempilo yabantu engozini.Ngaphezu kwalokho, ngenxa yezakhi ezihlukene eziqukethwe ku-HASL engenamthofu, izakhiwo zayo ze-solder kanye nogesi zihluke kancane, futhi zidinga ukukhethwa ngokuvumelana nezidingo ezithile zohlelo lokusebenza.Ngokuvamile, izindleko ze-HASL engenamthofu ziphakeme kancane kune-HASL yomthofu, kodwa ukuvikelwa kwayo kwemvelo nokusebenza kwayo kungcono, futhi kuthandwa abasebenzisi abaningi ngokwengeziwe.

Ukuze uhambisane nomyalelo we-RoHS, imikhiqizo yebhodi lesifunda idinga ukuhlangabezana nalezi zimo ezilandelayo:

1. Okuqukethwe komthofu (Pb), i-mercury (Hg), i-cadmium (Cd), i-hexavalent chromium (Cr6+), i-polybrominated biphenyls (PBB) nama-diphenyl ethers enziwe nge-polybrominated (PBDE) kufanele kube ngaphansi kwenani lomkhawulo elishiwo.

2. Okuqukethwe kwezinsimbi eziyigugu njenge-bismuth, isiliva, igolide, i-palladium, neplatinamu kufanele kube ngaphakathi kwemikhawulo enengqondo.

3. Okuqukethwe kwe-halogen kufanele kube ngaphansi kwenani lomkhawulo elishiwo, okuhlanganisa i-chlorine (Cl), i-bromine (Br) ne-iodine (I).

4. Ibhodi lesifunda kanye nezingxenye zalo kufanele zibonise okuqukethwe kanye nokusetshenziswa kwezinto ezinobuthi ezifanele neziyingozi.Lokhu okungenhla kungenye yezimo eziyinhloko zokuthi amabhodi esekethe ahambisane nomyalelo we-RoHS, kodwa izidingo ezithile zidinga ukunqunywa ngokuvumelana nemithetho yendawo kanye namazinga.