Nrog rau kev txhim kho txuas ntxiv ntawm kev tshawb fawb thiab thev naus laus zis, PCB thev naus laus zis kuj tau hloov pauv zoo, thiab cov txheej txheem tsim khoom kuj tseem xav tau kev nce qib.Nyob rau tib lub sijhawm txhua qhov kev lag luam ntawm cov txheej txheem PCB pawg thawj coj tau maj mam txhim kho, xws li cov xov tooj ntawm tes thiab cov khoos phis tawj hauv Circuit Board, kev siv kub, tab sis kuj siv tooj liab, uas ua rau qhov zoo thiab qhov tsis zoo ntawm lub rooj tsavxwm tau maj mam. ua kom paub qhov txawv.

Peb coj koj los nkag siab txog cov txheej txheem saum npoo ntawm PCB pawg thawj coj saib, sib piv qhov zoo thiab qhov tsis zoo ntawm PCB pawg thawj coj saib sib txawv thiab cov xwm txheej siv tau.

Ntshiab los ntawm sab nraud, txheej txheej ntawm lub rooj tsav xwm Circuit Court muaj peb lub ntsiab xim: kub, nyiaj, lub teeb liab.Raws li tus nqi categorization: kub yog qhov kim tshaj plaws, nyiaj yog qhov tom ntej, lub teeb liab yog qhov pheej yig tshaj, los ntawm cov xim yog qhov yooj yim heev los txiav txim seb cov tuam txhab kho vajtse puas tau txiav cov fab.Txawm li cas los xij, lub rooj tsav xwm hauv Circuit Court yog feem ntau yog tooj liab ntshiab, uas yog, liab qab tooj liab board.

A, Pleev tooj liab board
Qhov zoo: tus nqi qis, tiaj tus, zoo solderability (nyob rau hauv cov ntaub ntawv ntawm tsis tau oxidized).

Qhov tsis zoo: yooj yim rau kev cuam tshuam los ntawm cov kua qaub thiab cov av noo, tsis tuaj yeem khaws cia rau lub sijhawm ntev, thiab yuav tsum tau siv li ntawm 2 teev tom qab unpacking, vim tooj liab yog yooj yim oxidized thaum raug huab cua;tsis tuaj yeem siv rau ob sab, vim tias sab thib ob tau oxidized tom qab thawj reflow.Yog tias muaj qhov ntsuas qhov ntsuas, yuav tsum ntxiv cov ntawv luam tawm los tiv thaiv oxidation, txwv tsis pub cov tom ntej yuav tsis tuaj yeem tiv tauj nrog kev sojntsuam zoo.

Cov tooj liab ntshiab tuaj yeem yooj yim oxidized yog tias raug huab cua, thiab txheej txheej sab nrauv yuav tsum muaj txheej tiv thaiv saum toj no.Thiab qee cov neeg xav tias cov xim daj yog tooj liab, qhov no tsis yog lub tswv yim zoo, vim tias qhov ntawd yog tooj liab saum txheej tiv thaiv.Yog li nws yuav tsum yog thaj chaw loj ntawm kub plating ntawm lub rooj tsavxwm, uas yog, yav tas los kuv tau coj koj los nkag siab txog cov txheej txheem dej dab dej.

B, Kub-plated board

Kev siv cov kub ua ib txheej plating, ib qho yog los pab txhawb kev vuam, qhov thib ob yog los tiv thaiv corrosion.Txawm tias tom qab ob peb xyoos ntawm lub cim xeeb ntawm cov ntiv tes kub, tseem ci ntsa iab zoo li yav dhau los, yog tias qhov qub siv tooj liab, txhuas, hlau, tam sim no tau xeb mus rau hauv ib pawg ntawm cov khoom seem.

Kub plating txheej yog siv hnyav rau hauv Circuit Court board tivthaiv pads, kub ntiv tes, connector shrapnel thiab lwm qhov chaw.Yog tias koj pom tias lub rooj tsav xwm hauv Circuit Court yog nyiaj tiag tiag, nws mus yam tsis tau hais, hu rau tus neeg siv khoom txoj cai hotline ncaj qha, nws yuav tsum yog cov chaw tsim khoom txiav cov ces kaum, tsis siv cov khoom siv kom zoo, siv lwm cov hlau los dag cov neeg siv khoom.Peb siv cov khoom siv hluav taws xob ntau tshaj plaws ntawm lub xov tooj hluav taws xob feem ntau yog kub-plated board, sunken kub board, computer motherboards, suab thiab me me digital circuit boards feem ntau tsis kub-plated board.

Qhov zoo thiab qhov tsis zoo ntawm cov txheej txheem sunken kub yog qhov tseeb tsis yooj yim rau kos.

Qhov zoo: tsis yooj yim rau oxidation, tuaj yeem khaws cia rau lub sijhawm ntev, qhov chaw tiaj tus, haum rau vuam zoo sib txawv pins thiab cov khoom siv nrog cov pob qij txha me me.Txaus siab rau PCB boards nrog cov yuam sij (xws li cov xov tooj ntawm tes).Yuav rov qab tau ntau zaus dua reflow soldering tsis zoo li yuav txo tau nws cov solderability.Nws tuaj yeem siv los ua lub substrate rau COB (Chip On Board) cim.

Qhov tsis zoo: tus nqi siab dua, tsis zoo solder lub zog, yooj yim kom muaj teeb meem ntawm cov phaj dub vim yog siv cov txheej txheem electroless nickel.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, nyiaj yog nyiaj?Tau kawg tsis, yog tin.

C, HAL/HAL LF
Silver-xim board yog hu ua spray tin board.Txau ib txheej ntawm tin nyob rau hauv txheej txheej ntawm cov kab tooj liab kuj tuaj yeem pab tau soldering.Tab sis tsis tuaj yeem muab kev sib cuag ntev ntev xws li kub.Rau cov khoom uas tau raug soldered muaj cov nyhuv me me, tab sis rau lub sij hawm ntev raug rau cov pa hauv ncoo, kev cia siab tsis txaus, xws li cov ntaub qhwv hauv av, cov mos txwv tus pin qhov (socket), thiab lwm yam. kev sib cuag tsis zoo.Yeej siv los ua cov khoom siv digital me me, tsis muaj kev zam, yog cov tshuaj tsuag tin board, yog vim li cas pheej yig.

Nws qhov zoo thiab qhov tsis zoo tau sau tseg raws li hauv qab no

Qhov zoo: tus nqi qis dua, kev ua haujlwm zoo soldering.

Disadvantages: tsis haum rau soldering nplua qhov sib txawv pins thiab cov khoom me me dhau lawm, vim tias qhov flatness ntawm cov tshuaj tsuag tin board tsis zoo.Hauv kev ua cov PCB yog ib qho yooj yim los tsim cov hlaws hlaws (cov hlaws hlaws), cov hlua zoo nkauj (pitch zoo) cov khoom yooj yim ua rau luv luv.Thaum siv cov txheej txheem ob sab SMT, vim tias sab thib ob tau ua kom kub siab, nws yooj yim rau yaj cov tshuaj tsuag tin dua thiab tsim cov tin hlaws lossis cov dej zoo sib xws los ntawm lub ntiajteb txawj nqus mus rau hauv cov tee ntawm kheej kheej tin me ntsis, ua rau muaj qhov sib txawv ntawm qhov sib txawv. ntau uneven nto thiab yog li cuam tshuam cov teeb meem soldering.

Yav dhau los hais txog qhov pheej yig tshaj lub teeb liab Circuit Court board, uas yog, mine teeb thermoelectric sib cais tooj liab substrate.

4, OSP txheej txheem board

Organic flux zaj duab xis.Vim nws yog cov organic, tsis yog hlau, yog li nws yog pheej yig dua li cov txheej txheem tin.

Nws qhov zoo thiab qhov tsis zoo yog

Qhov zoo: muaj tag nrho cov txiaj ntsig ntawm liab qab tooj liab board soldering, cov laug cam uas tas sij hawm kuj tuaj yeem rov ua dua thaum kho qhov chaw.

Disadvantages: Yooj yim cuam tshuam los ntawm acid thiab av noo.Thaum siv nyob rau hauv theem nrab reflow, nws yuav tsum tau ua nyob rau hauv ib tug tej lub sij hawm ntawm lub sij hawm, thiab feem ntau qhov thib ob reflow yuav tsis zoo.Yog tias lub sijhawm khaws cia ntau tshaj peb lub hlis, nws yuav tsum rov ua dua.OSP yog ib txheej txheej insulating, yog li qhov ntsuas qhov ntsuas yuav tsum tau stamped nrog solder paste kom tshem tawm cov txheej txheem OSP qub txhawm rau tiv tauj lub koob taw tes rau kev kuaj hluav taws xob.

Lub hom phiaj nkaus xwb ntawm cov yeeb yaj kiab no yog los xyuas kom meej tias cov ntawv nyiaj hauv tooj liab tsis oxidized ua ntej soldering.Thaum rhuab thaum lub sij hawm soldering, zaj duab xis evaporates tam sim ntawd.Yog li ntawd, solder yog muaj peev xwm solder cov tooj liab hlau thiab cov khoom ua ke.

Tab sis nws yog heev resistant rau corrosion, ib tug OSP board, raug rau saum huab cua rau kaum los yog li ntawd hnub, koj yuav tsis tau solder Cheebtsam.

Computer motherboards muaj ntau txheej txheem OSP.Vim tias thaj tsam ntawm pawg thawj coj loj dhau los siv kub plating.