Nrog rau kev txhim kho txuas ntxiv ntawm electronic science thiab technology, PCB thev naus laus zis kuj tau hloov pauv loj heev, thiab cov txheej txheem tsim khoom kuj tseem yuav tsum tau txhim kho. Nyob rau tib lub sijhawm, cov txheej txheem yuav tsum tau ua rau PCB Circuit Boards hauv txhua qhov kev lag luam tau maj mam txhim kho. Piv txwv li, nyob rau hauv Circuit Court boards ntawm lub xov tooj ntawm tes thiab computers, kub thiab tooj liab yog siv, uas ua rau nws yooj yim dua rau paub qhov txawv qhov zoo thiab qhov tsis zoo ntawm Circuit Court boards.

Coj txhua tus kom nkag siab txog cov thev naus laus zis saum npoo ntawm PCB pawg thawj coj saib, thiab sib piv qhov zoo thiab qhov tsis zoo thiab cov xwm txheej cuam tshuam ntawm cov txheej txheem PCB sib txawv.

Purely los ntawm sab nraud, txheej txheej ntawm lub rooj tsav xwm Circuit Court feem ntau muaj peb xim: kub, nyiaj, thiab lub teeb liab. Muab faib los ntawm tus nqi: kub yog qhov kim tshaj plaws, nyiaj yog thib ob, thiab lub teeb liab yog qhov pheej yig tshaj. Qhov tseeb, nws yog ib qho yooj yim los txiav txim los ntawm cov xim seb puas kho vajtse manufacturers txiav cov ces kaum. Txawm li cas los xij, cov xaim hauv lub rooj tsav xwm hauv Circuit Court feem ntau yog tooj liab ntshiab, uas yog, liab qab tooj liab board.

1. Cov phaj tooj liab liab

Qhov zoo thiab qhov tsis zoo pom tseeb:

Qhov zoo: tus nqi qis, nto du, zoo weldability (thaum tsis muaj oxidation).

Qhov tsis zoo: Nws yog ib qho yooj yim los cuam tshuam los ntawm acid thiab av noo thiab tsis tuaj yeem khaws cia rau lub sijhawm ntev. Nws yuav tsum tau siv li ntawm 2 teev tom qab unpacking, vim tooj liab yog yooj yim oxidized thaum raug huab cua; Nws tsis tuaj yeem siv rau ob sab boards vim tias sab thib ob tom qab thawj reflow soldering Nws twb oxidized. Yog tias muaj qhov ntsuas qhov ntsuas, cov tshuaj nplaum yuav tsum tau luam tawm los tiv thaiv oxidation, txwv tsis pub nws yuav tsis zoo rau kev sojntsuam.

Cov tooj liab ntshiab yog yooj yim oxidized yog tias raug huab cua, thiab txheej txheej yuav tsum muaj cov txheej txheem tiv thaiv saum toj no. Thiab qee cov neeg xav tias cov xim daj yog tooj liab, uas yog qhov tsis ncaj ncees lawm vim nws yog txheej tiv thaiv ntawm tooj liab. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau muab lub phaj loj ntawm cov kub ntawm lub rooj tsav xwm Circuit Court, uas yog cov txheej txheem kub immersion uas kuv tau qhia rau koj ua ntej.

Qhov thib ob, lub phaj kub

Kub yog kub tiag. Txawm hais tias tsuas yog ib txheej nyias nyias yog plated, nws twb tso nyiaj rau ze li 10% ntawm tus nqi ntawm lub rooj tsavxwm. Hauv Shenzhen, muaj ntau tus tub lag luam uas tshwj xeeb hauv kev yuav cov khib nyiab pov tseg. Lawv tuaj yeem ntxuav cov kub los ntawm qee txoj kev, uas yog cov nyiaj tau los zoo.

Siv kub ua txheej txheej plating, ib qho yog los pab kev vuam, thiab lwm yam yog tiv thaiv corrosion. Txawm tias tus ntiv tes kub ntawm lub cim xeeb stick uas tau siv rau ntau xyoo tseem flickers li yav dhau los. Yog tias tooj liab, txhuas, thiab hlau tau siv thawj qhov chaw, tam sim no lawv tau xeb mus rau hauv ib pawg ntawm cov khoom seem.

Cov txheej kub-plated yog dav siv nyob rau hauv cov khoom pads, kub ntiv tes, thiab connector shrapnel ntawm lub rooj tsavxwm Circuit Court. Yog tias koj pom tias lub rooj tsav xwm Circuit Court yog nyiaj tiag tiag, nws mus yam tsis tau hais. Yog tias koj hu rau tus neeg siv khoom tus xov tooj ncaj qha, cov chaw tsim khoom yuav tsum txiav cov fab, siv cov khoom tsis raug, thiab siv lwm cov hlau los dag cov neeg siv khoom. Cov motherboards ntawm lub xov tooj ntawm tes uas siv ntau tshaj plaws yog cov laug cam feem ntau yog kub plated boards, immersed kub boards, computer motherboards, suab thiab me me digital circuit boards feem ntau tsis kub-plated boards.

Qhov zoo thiab qhov tsis zoo ntawm immersion kub thev naus laus zis yeej tsis yooj yim rau kos:

Qhov zoo: Nws tsis yooj yim rau oxidize, tuaj yeem khaws cia rau lub sijhawm ntev, thiab qhov chaw tiaj tus, haum rau vuam me me qhov sib txawv pins thiab cov khoom siv nrog cov pob qij txha me me. Thawj qhov kev xaiv ntawm PCB boards nrog cov nyees khawm (xws li lub xov tooj txawb). Reflow soldering tuaj yeem rov ua dua ntau zaus yam tsis tas yuav txo nws cov solderability. Nws tuaj yeem siv los ua lub substrate rau COB (ChipOnBoard) hlau sib txuas.

Qhov tsis zoo: tus nqi siab, lub zog vuam tsis zoo, vim tias siv cov txheej txheem electroless nickel plating, nws yog ib qho yooj yim kom muaj teeb meem ntawm cov xim dub. Cov nickel txheej yuav oxidize lub sij hawm, thiab kev cia siab rau lub sij hawm ntev yog ib qho teeb meem.

Tam sim no peb paub tias kub yog kub thiab nyiaj yog nyiaj? Tau kawg tsis yog, nws yog tin.

Thib peb, tshuaj tsuag lub rooj tsav xwm hauv tin

Lub board nyiaj yog hu ua spray tin board. Txau ib txheej ntawm cov tin rau ntawm txheej txheej ntawm tooj liab tuaj yeem pab tau soldering. Tab sis nws tsis tuaj yeem muab kev sib cuag mus ntev xws li kub. Nws tsis muaj qhov cuam tshuam rau cov khoom siv uas tau raug soldered, tab sis qhov kev ntseeg tau tsis txaus rau cov ntaub qhwv uas tau raug huab cua ntev ntev, xws li cov ntaub qhwv hauv av thiab cov pins. Kev siv lub sij hawm ntev yog ua rau oxidation thiab corrosion, uas ua rau kev sib cuag tsis zoo. Yeej siv raws li lub rooj tsav xwm hauv Circuit Court ntawm cov khoom me me, tsis muaj kev zam, cov tshuaj tsuag tin board, yog vim li cas nws pheej yig.

Nws qhov zoo thiab qhov tsis zoo yog suav nrog:

Qhov zoo: txo tus nqi thiab kev ua haujlwm vuam zoo.

Disadvantages: Tsis haum rau welding pins nrog nplua qhov khoob thiab cov khoom uas me dhau, vim tias qhov flatness ntawm cov tshuaj tsuag tin phaj tsis zoo. Cov hlaws hlaws yog nquag tsim thaum lub sijhawm ua haujlwm PCB, thiab nws yooj yim dua los ua kom luv luv rau cov khoom siv suab zoo. Thaum siv cov txheej txheem ob sab SMT, vim tias sab thib ob tau dhau los ua qhov kub thiab txias, nws yooj yim heev rau cov tin thiab rov yaj, ua rau cov tin hlaws lossis cov tee dej zoo sib xws uas cuam tshuam los ntawm lub ntiajteb txawj nqus mus rau hauv cov tins kheej kheej. dots, uas yuav ua rau saum npoo yuav ua phem heev. Flattening cuam tshuam cov teeb meem vuam.

Ua ntej tham txog qhov pheej yig tshaj lub teeb liab Circuit Court board, uas yog, miner lub teeb thermoelectric sib cais tooj liab substrate

Plaub, OSP craft board

Organic soldering zaj duab xis. Vim nws yog cov organic, tsis yog hlau, nws yog pheej yig dua tin spraying.

Qhov zoo: Nws muaj tag nrho cov txiaj ntsig ntawm liab qab tooj liab phaj vuam, thiab lub rooj tsav xwm tas sij hawm tuaj yeem rov kho dua.

Disadvantages: yooj yim cuam tshuam los ntawm acid thiab av noo. Thaum siv nyob rau hauv lub thib ob reflow soldering, nws yuav tsum tau ua kom tiav nyob rau hauv ib tug tej lub sij hawm ntawm lub sij hawm, thiab feem ntau cov nyhuv ntawm lub thib ob reflow soldering yuav kuj tsis zoo. Yog tias lub sijhawm khaws cia ntau tshaj peb lub hlis, nws yuav tsum rov ua dua. Nws yuav tsum siv li ntawm 24 teev tom qab qhib lub pob. OSP yog txheej txheej insulating, yog li qhov ntsuas qhov ntsuas yuav tsum tau muab luam tawm nrog cov tshuaj txhuam kom tshem tawm cov txheej txheem OSP ua ntej nws tuaj yeem tiv tauj tus pin point rau kev kuaj hluav taws xob.

Lub luag haujlwm ntawm cov yeeb yaj kiab no tsuas yog los xyuas kom meej tias cov ntaub ntawv tooj liab sab hauv yuav tsis raug oxidized ua ntej vuam. Cov txheej ntawm zaj duab xis volatilizes sai li sai tau thaum nws yog rhuab thaum vuam. Lub solder tuaj yeem txuas cov hlau tooj liab thiab cov khoom ua ke.

Tab sis nws tsis yog resistant rau corrosion. Yog tias lub rooj tsav xwm OSP raug huab cua rau kaum hnub, cov khoom siv tsis tuaj yeem welded.

Ntau lub khoos phis tawj motherboard siv OSP thev naus laus zis. Vim tias thaj tsam ntawm lub rooj tsav xwm Circuit Court loj dhau lawm, nws tsis tuaj yeem siv rau kub plating.