Nekuenderera mberi kwekusimudzira kwesainzi yemagetsi uye tekinoroji, PCB tekinoroji yakaitawo shanduko huru, uye maitiro ekugadzira anodawo kuvandudzwa. Panguva imwecheteyo, izvo zvinodikanwa zvePCB redunhu mabhodhi mune yega indasitiri zvakavandudza zvishoma nezvishoma. Semuenzaniso, mumapuranga emagetsi emafoni nemakombiyuta, goridhe nemhangura zvinoshandiswa, izvo zvinoita kuti zvive nyore kusiyanisa zvakanakira uye zvisingabatsiri zvemabhodhi edunhu.

Tora munhu wese kuti anzwisise tekinoroji yepamusoro yePCB board, uye enzanisa zvakanakira nekuipira uye anoshanda mamiriro eakasiyana PCB board epamusoro ekurapa maitiro.

Zvakachena kubva kunze, chikamu chekunze chebhodhi redunhu chinonyanya kuve nemavara matatu: goridhe, sirivha, uye chiedza chitsvuku. Inorongwa nemutengo: goridhe ndiyo inonyanya kudhura, sirivha ndeyechipiri, uye tsvuku tsvuku ndiyo yakachipa. Muchokwadi, zviri nyore kutonga kubva kumuvara kana vagadziri vehardware vari kutema makona. Zvisinei, iyo wiring mukati mebhodhi redunhu inonyanya kuchena mhangura, kureva kuti, isina bhodhi yemhangura.

1. Yakaiswa ndiro yemhangura

Zvakanakira nekuipira zviri pachena:

Zvakanakira: yakaderera mutengo, yakatsetseka pamusoro, yakanaka weldability (mukushayikwa kweiyo oxidation).

Zvakaipa: Zviri nyore kukanganiswa neasidhi uye hunyoro uye haigone kuchengetwa kwenguva yakareba. Inofanira kushandiswa mukati maawa maviri mushure mokusunungura, nokuti mhangura inoshandiswa nyore nyore oxidized kana yaiswa mumhepo; haigoni kushandiswa kumapuranga ane mativi maviri nokuti rutivi rwechipiri mushure mekutanga reflow soldering Yatove yakasvibiswa. Kana paine bvunzo poindi, solder paste inofanira kudhindwa kudzivirira oxidation, zvikasadaro hazvizove zvakanaka kusangana neprobe.

Mhangura yakachena inoiswa oxidized nyore nyore kana yakafumurwa kumhepo, uye iyo yekunze dhizaini inofanirwa kunge iine yakataurwa pamusoro inodzivirira layer. Uye vamwe vanhu vanofunga kuti yero yegoridhe imhangura, izvo zvakaipa nekuti ndiyo inodzivirira pamhangura. Naizvozvo, zvinodikanwa kuisa nzvimbo yakakura yegoridhe pabhodhi redunhu, inova nzira yekunyudza yegoridhe iyo yandakakudzidzisa kare.

Chechipiri, ndiro yegoridhe

Ndarama igoridhe chairo. Kunyange kana chidimbu chakatetepa chete chakaputirwa, chinototora chikamu che10% chemutengo webhodhi redunhu. MuShenzhen, kune vatengesi vazhinji vanonyanya kutenga marara edunhu mabhodhi. Vanogona kusuka goridhe kuburikidza nedzimwe nzira, inova mari yakanaka.

Shandisa goridhe seplating layer, imwe ndeye kufambisa welding, uye imwe ndeyekudzivirira ngura. Kunyange chigunwe chegoridhe chememory stick icho chave chichishandiswa kwemakore anoverengeka chichiri kupenya sekare. Kana mhangura, aruminiyamu, nesimbi zvakashandiswa pakutanga, zvino zvaita ngura kuita murwi wezvimedu.

Iyo yegoridhe-yakanamirwa layer inoshandiswa zvakanyanya muchikamu mapedhi, zvigunwe zvegoridhe, uye shrapnel yekubatanidza yedare redunhu. Kana iwe ukaona kuti bhodhi redunhu isirivha chaiyo, inoenda pasina kutaura. Kana ukafonera hotline yekodzero dzevatengi zvakananga, mugadziri anofanira kunge achicheka makona, kutadza kushandisa zvinhu nemazvo, uye kushandisa dzimwe simbi kunyengedza vatengi. Mabhodhi eamai eanonyanya kushandiswa mbozha nhare edunhu mabhodhi kazhinji ane goridhe-akaputirwa mabhodhi, akanyudzwa goridhe mabhodhi, makomputa mamabhodhi, odhiyo uye madiki edhijitari edunhu mabhodhi kazhinji haasi mabhodhi akaputirwa negoridhe.

Zvakanakira uye zvakaipira zvekunyudza goridhe tekinoroji hazvina kunetsa kudhirowa:

Zvakanakira: Haisi nyore kuita oxidize, inogona kuchengetwa kwenguva yakareba, uye pamusoro payo yakati sandara, yakakodzera kubatanidza mapini madiki egap uye zvikamu zvine majoini madiki ekutengesa. Sarudzo yekutanga yemabhodhi ePCB ane mabhatani (akadai semabhodhi enharembozha). Reflow soldering inogona kudzokororwa kakawanda pasina kuderedza solderability yayo. Inogona kushandiswa se substrate yeCOB (ChipOnBoard) waya yekubatanidza.

Kukanganisa: kudhura kwakanyanya, kusimba kusimba kusimba, nekuti iyo electroless nickel plating process inoshandiswa, zviri nyore kuve nedambudziko reblack disk. Iyo nickel layer ichaita oxidize nekufamba kwenguva, uye kuvimbika kwenguva refu idambudziko.

Zvino tava kuziva kuti goridhe igoridhe uye sirivha isirivha? Chokwadi kwete, irata.

Tatu, pfapfaidza gaba redunhu bhodhi

Sirivha bhodhi rinonzi spray tin board. Kupfapfaidza dhiri rematani pachikamu chekunze chedunhu remhangura kunogona kubatsirawo kusona. Asi haigone kupa kuvimbika kwekusangana kwenguva refu segoridhe. Izvo hazvina simba pane zvikamu zvakatengeswa, asi kuvimbika hakuna kukwana kune mapedhi akave akaratidzwa kumhepo kwenguva yakareba, zvakadai sepasi pasi uye zvigadziko zvepini. Kushandiswa kwenguva refu kunowanzoita oxidation uye corrosion, zvichikonzera kusabatana kwakashata. Inonyanya kushandiswa seyedunhu bhodhi rediki zvigadzirwa zvedhijitari, pasina kusarudzika, iyo spray tin board, chikonzero ndechekuti yakachipa.

Zvayakanakira nezvayakaipira zvinopfupikiswa se:

Advantages: mutengo wakaderera uye yakanaka welding performance.

Zvakaipa: Haikodzeri mapini ekushivirira ane maburi akatsetseka uye zvikamu zvidiki zvakanyanya, nekuti kupfava kwepamusoro kweplate yepfapfaidzo hakuna kunaka. Solder beads dzinowanzo kugadzirwa panguva yePCB kugadzirisa, uye zviri nyore kukonzera mapfupi maseketi kune yakanaka pitch zvikamu. Kana ichishandiswa mune yakapetwa kaviri-mativi eSMT maitiro, nekuti chikamu chechipiri chakave nepamusoro-tembiricha reflow solder, zviri nyore kupfapfaidza tini nekunyunguduka zvakare, zvichikonzera mabheji emarata kana madonhwe akafanana anokanganiswa negiravhiti mumarata akatenderera. madots, izvo zvichaita kuti kumusoro kuve kwakanyanya. Kupfapfaidza kunokanganisa welding matambudziko.

Usati wataura nezve yakachipa mwenje dzvuku redunhu bhodhi, kureva, mwenje wemugodhi wethermoelectric kupatsanura mhangura substrate.

Ina, OSP craft board

Organic soldering firimu. Nekuti iri organic, kwete simbi, yakachipa pane kumwaya marata.

Zvakanakira: Iyo ine zvese zvakanakira zvekushama mhangura plate welding, uye iyo yakapera nguva bhodhi inogona zvakare kubatwa pamusoro zvakare.

Zvakaipa: zviri nyore kukanganiswa neasidhi uye humidity. Kana ichishandiswa mune yechipiri reflow soldering, inoda kupedzwa mukati meimwe nguva yenguva, uye kazhinji mhedzisiro yechipiri reflow soldering ichave yakashata. Kana nguva yekuchengetedza ichipfuura mwedzi mitatu, inofanira kudzorerwa zvakare. Inofanirwa kushandiswa mukati maawa makumi maviri nemana mushure mekuvhura package. OSP insulating layer, saka test point inofanirwa kudhindwa ne solder paste kuti ibvise iyo yepakutanga OSP layer isati yabata pini yekuyedza magetsi.

Izvo chete basa reiyi organic firimu kuve nechokwadi chekuti mukati memhangura foil haizove oxidized isati yaiswa. Iyi firimu yefirimu inonyunguduka kana ichinge yapisa panguva yewelding. Solder inogona kubatanidza waya yemhangura nemidziyo pamwe chete.

Asi haidziviriri kune ngura. Kana iyo OSP yedunhu bhodhi inoratidzwa kumhepo kwemazuva gumi, zvikamu hazvigone kusungirirwa.

Mazhinji emakombuta mamabhodhi anoshandisa OSP tekinoroji. Nekuti nzvimbo yedunhu bhodhi yakakura kwazvo, haigone kushandiswa kugadzira goridhe.