Yuav ua li cas to taub qhov nto tiav los ntawm PCB xim?

Los ntawm qhov chaw ntawm PCB, muaj peb lub ntsiab xim: kub, nyiaj thiab lub teeb liab. Kub PCB yog qhov kim tshaj plaws, nyiaj yog qhov pheej yig tshaj, thiab lub teeb liab yog qhov pheej yig tshaj.

Koj tuaj yeem paub seb cov chaw tsim khoom puas txiav cov fab ntawm cov xim saum npoo.

Tsis tas li ntawd, qhov hluav taws xob hauv Circuit Court board feem ntau yog tooj liab ntshiab. Tooj liab yog yooj yim oxidized thaum raug huab cua, yog li txheej txheej yuav tsum muaj cov txheej txheem tiv thaiv saum toj no.

kub

Ib txhia hais tias kub yog tooj liab, uas yog tsis ncaj ncees lawm.

Thov xa mus rau daim duab kub plated ntawm lub rooj tsavxwm Circuit Court raws li qhia hauv qab no:

Qhov kim tshaj plaws kub Circuit Court board yog kub tiag. Txawm hais tias nws nyias nyias, nws kuj suav txog ze li 10% ntawm tus nqi ntawm lub rooj tsavxwm.

Muaj ob qhov zoo rau kev siv kub, ib qho yooj yim rau vuam, thiab lwm yam yog los tiv thaiv corrosion.

Raws li pom hauv daim duab hauv qab no, qhov no yog tus ntiv tes kub ntawm lub cim xeeb 8 xyoo dhau los. Nws tseem yog golden sparkling.

Cov txheej kub-plated yog dav siv nyob rau hauv Circuit Court board tivthaiv pads, kub ntiv tes, connector shrapnel, thiab lwm yam.

Yog tias koj pom tias qee qhov Circuit Court boards yog nyiaj, nws yuav tsum tau txiav cov fab. Peb hu nws “txo nqi”.

Feem ntau hais lus, lub xov tooj ntawm tes motherboards yog kub-plated, tab sis lub computer motherboards thiab cov boards me me tsis yog kub-plated.

Thov xa mus rau lub rooj tsav xwm iPhone X hauv qab no, cov khoom raug nthuav tawm yog tag nrho cov kub-plated.

nyiaj

Kub yog kub, nyiaj yog nyiaj? Tau kawg tsis yog, nws yog tin.

Lub board nyiaj hu ua HASL board. Txau tin rau ntawm txheej txheej tooj liab kuj tseem pab tau soldering, tab sis nws tsis ruaj khov li kub.

Nws tsis muaj kev cuam tshuam rau qhov twb welded qhov chaw ntawm HASL board. Txawm li cas los xij, yog tias lub ncoo raug huab cua ntev ntev, xws li cov ntaub qhwv hauv av thiab cov qhov (socket), nws yooj yim rau oxidize thiab xeb, ua rau tsis zoo.

Tag nrho cov khoom siv digital me yog HASL boards. Tsuas muaj ib qho laj thawj xwb: pheej yig.

Lub teeb liab

OSP (Organic Solderability Preservative), nws yog cov organic, tsis yog xim hlau, yog li nws pheej yig dua li txheej txheem HASL.

Lub luag haujlwm ntawm cov yeeb yaj kiab organic nkaus xwb yog los xyuas kom meej tias cov ntawv hauv tooj liab yuav tsis raug oxidized ua ntej soldering.

Thaum cov zaj duab xis evaporates, nws yuav evaporate thiab rhuab. Tom qab ntawd koj tuaj yeem muab cov tooj liab thiab cov khoom sib xyaw ua ke.

Tab sis nws yog yooj yim corroded. Yog tias lub rooj tsavxwm OSP raug huab cua ntau tshaj 10 hnub, nws tsis tuaj yeem raug soldered.

Muaj ntau ntau OSP txheej txheem ntawm lub computer motherboard. Vim lub Circuit Court board loj heev.