Indlela yokuqonda isiphetho esingaphezulu kusuka PCB umbala?

Kusukela ebusweni be-PCB, kunemibala emithathu eyinhloko: igolide, isiliva kanye nokukhanya okubomvu. I-PCB esagolide iyona ebiza kakhulu, isiliva ibiza kakhulu, futhi okubomvu okukhanyayo ishibhe kakhulu.

Ungazi ukuthi ngabe umenzi usika amakhona embala ongaphezulu.

Ngaphezu kwalokho, isifunda ngaphakathi kwebhodi lesifunda ikakhulukazi ithusi elihlanzekile. I-Copper i-oxidized kalula uma ivuliwe emoyeni, ngakho-ke ungqimba lwangaphandle kufanele lube nesendlalelo sokuzivikela esishiwo ngenhla.

Gold

Abanye abantu bathi igolide yithusi, okuyinto engalungile.

Sicela ubheke isithombe segolide esinamekwe ebhodini lesekethe njengoba kukhonjisiwe ngezansi:

Ibhodi lesifunda legolide elibiza kakhulu igolide langempela. Nakuba incane kakhulu, iphinde ibangele cishe u-10% wezindleko zebhodi.

Kunezinzuzo ezimbili zokusebenzisa igolide, enye ilungele ukushisela, kanti enye i-anti-corrosion.

Njengoba kuboniswe esithombeni esingezansi, lona umunwe wegolide we-memory stick eminyakeni engu-8 edlule. Kusacwebezela okusagolide.

Isendlalelo esifakwe ngegolide sisetshenziswa kakhulu kumaphedi engxenye yebhodi lesifunda, iminwe yegolide, i-shrapnel yesixhumi, njll.

Uma uthola ukuthi amanye amabhodi wesifunda ayisiliva, kufanele asikwe emakhoneni. Sikubiza ngokuthi “ukwehliswa kwentengo”.

Ngokuvamile, ama-motherboards omakhalekhukhwini afakwe ngegolide, kodwa ama-motherboards ekhompuyutha namabhodi amancane edijithali awanamekwe ngegolide.

Sicela ubheke ibhodi le-iPhone X elingezansi, izingxenye eziveziwe zonke zigcwele igolide.

Silver

Igolide liyigolide, isiliva liyisiliva? Akunjalo, ithini.

Ibhodi lesiliva libizwa ngokuthi ibhodi le-HASL. Ukufafaza uthayela ongqimbeni olungaphandle lwethusi nakho kusiza ukusoda, kodwa akuzinzile njengegolide.

Ayinawo umthelela ezingxenyeni ezishiselwe kakade zebhodi le-HASL. Kodwa-ke, uma i-pad ivezwe emoyeni isikhathi eside, njengama-grounding pads namasokhethi, kulula uku-oxidize nokugqwala, okuholela ekuxhumaneni okungalungile.

Yonke imikhiqizo emincane yedijithali ingamabhodi we-HASL. Kunesizathu esisodwa kuphela: ezishibhile.

Okubomvu okukhanyayo

I-OSP (Organic Solderability Preservative), iyimvelo, hhayi insimbi, ngakho ishibhile kunenqubo ye-HASL.

Umsebenzi kuphela wefilimu ephilayo ukuqinisekisa ukuthi i-foil yethusi yangaphakathi ngeke ifakwe i-oxidized ngaphambi kwe-soldering.

Uma ifilimu ihwamuka, izohwamuka futhi ifudumale. Khona-ke ungakwazi ukudambisa ucingo lwethusi kanye nengxenye ndawonye.

Kodwa igqwala kalula. Uma ibhodi le-OSP livezwa emoyeni izinsuku ezingaphezu kweziyi-10, alikwazi ukuthengiswa.

Kunezinqubo eziningi ze-OSP ebhodini lomama lekhompyutha. Ngoba usayizi webhodi lesifunda mkhulu kakhulu.