Nzira yekunzwisisa pamusoro pekupedzisa kubva PCB ruvara?

Kubva pamusoro pePCB, kune matatu makuru mavara: goridhe, sirivha uye tsvuku tsvuku. PCB yegoridhe ndiyo inodhura zvakanyanya, sirivha ndiyo yakachipa, uye tsvuku tsvuku ndiyo yakachipa.

Iwe unogona kuziva kana mugadziri ari kucheka makona kubva kumuvara wepamusoro.

Mukuwedzera, dunhu mukati mebhodhi redunhu rinonyanya kuchena mhangura. Mhangura iri nyore oxidized kana yaiswa kumhepo, saka iyo yekunze dhizaini inofanirwa kunge iine yakataurwa pamusoro inodzivirira layer.

goridhe

Vamwe vanhu vanoti goridhe indarira, izvo zvisiri izvo.

Ndokumbira utarise mufananidzo wegoridhe wakaputirwa pabhodhi redunhu sekuratidzwa pazasi:

Iyo inodhura zvakanyanya goridhe redunhu bhodhi igoridhe chairo. Kunyangwe iyo yakaonda kwazvo, inoverengera ingangoita gumi muzana yemutengo webhodhi.

Pane mabhenefiti maviri ekushandisa goridhe, imwe yakanakira welding, uye imwe anti-corrosion.

Sezvinoratidzwa pamufananidzo uri pasi apa, uyu munwe wegoridhe wememory stick makore masere apfuura. Ichiri kupenya segoridhe.

Iyo yegoridhe-yakavharwa layer inoshandiswa zvakanyanya mudunhu redunhu rechikamu pads, zvigunwe zvegoridhe, chinongedzo shrapnel, nezvimwe.

Kana iwe ukaona kuti mamwe mapuranga edunhu isirivha, anofanira kutemwa makona. Tinozviti “kuderedza mutengo”.

Kazhinji kutaura, nharembozha mamabhodhi akaputirwa negoridhe, asi mabhodhi ekombuta nemabhodhi madiki edhijitari haana kuputirwa negoridhe.

Ndokumbira utarise iyo iPhone X bhodhi pazasi, zvikamu zvakafumurwa zvese zvakapfavirwa negoridhe.

sirivha

Ndarama indarama, sirivha isirivha here? Chokwadi kwete, irata.

Sirivha bhodhi inonzi HASL board. Kupfapfaidza tini pachikamu chekunze chemhangura kunobatsirawo kusona, asi haina kugadzikana segoridhe.

Izvo hazvina zvazvinoita pane zvakatogadzirwa zvikamu zveHASL board. Nekudaro, kana iyo padhi inoratidzwa kumhepo kwenguva yakareba, senge pasi pedhi uye zvigadziko, zviri nyore kuita oxidize uye ngura, zvichikonzera kusabatana kwakashata.

Zvese zvigadzirwa zvidiki zvedhijitari mabhodhi eHASL. Pane chikonzero chimwe chete: zvakachipa.

Chiedza chitsvuku

OSP (Organic Solderability Preservative), ndeye organic, kwete simbi, saka yakachipa pane HASL maitiro.

Izvo chete basa reiyo organic firimu kuve nechokwadi chekuti mukati memhangura foil haizove oxidized isati yatengeswa.

Kamwe firimu rinoputika, rinoputika uye rinopisa. Ipapo iwe unogona solder waya yemhangura uye chikamu pamwe chete.

Asi zviri nyore kuita ngura. Kana iyo OSP bhodhi inoratidzwa kumhepo kwemazuva anopfuura gumi, haigone kutengeswa.

Kune akawanda OSP maitiro pane komputa mamaboard. Nekuti saizi yebhodhi redunhu yakakura kwazvo.