Lub hom phiaj tseem ceeb ntawm PCB ci yog kom dehumidify thiab dehumidify, kom tshem cov dej noo nyob hauv lossis nqus los ntawm sab nraud ntawm PCB, vim tias qee cov ntaub ntawv PCB yooj yim los ua dej molecules.

Ib qho ntxiv, PCBS kuj tseem muaj lub sijhawm nqus cov dej noo mus rau ib puag ncig tom qab lawv tau tsim thiab tso tawm rau ib ntus, thiab dej yog ib tus neeg ua txhaum loj ntawm paj kws lossis ua rau tsis zoo. Thaum PCB tau muab tso rau hauv ib puag ncig uas muaj qhov kub siab tshaj 100 ℃, xws li cov cua sov rov qab, cua sov rauv, cua kub tsim lossis txheej txheem vuam siv tes, dej yuav tig mus ua pa thiab nthuav dav sai sai.

Cov PCB tau rhaub sai dua, cov dej ua kom nrawm dua. Qhov kub siab dua, qhov ntim dej ntau dua; When water vapor cannot escape from the PCB in time, it has a good chance to inflate the PCB.

Tshwj xeeb, Z cov lus qhia ntawm PCB yog qhov muaj kev phom sij tshaj plaws, qee zaum nws tuaj yeem ua txhaum ntawm ntawm txheej txheej ntawm PCB, qee zaum nws yuav ua rau sib cais ntawm txheej txheej ntawm PCB, txawm tias qhov pom ntawm PCB tuaj yeem pom ua npuas, nthuav dav, tawg pawg thawj coj saib thiab lwm yam tshwm sim;

Qee zaum, txawm hais tias PCB tsis pom qhov tshwm sim saum toj no ntawm qhov saum npoo, nws yog qhov kev puas tsuaj sab hauv. Lub sijhawm dhau los, nws yuav ua rau muaj kev ruaj ntseg tsis zoo ntawm cov khoom siv hluav taws xob, lossis CAF thiab lwm yam teeb meem, thiab thaum kawg ua rau cov khoom lag luam tsis ua haujlwm.

Qhov ua rau txheeb xyuas tiag tiag thiab ntsuas kev tiv thaiv ntawm PCB tawg pawg thawj coj saib

Qhov tseeb, txheej txheem ntawm PCB ci yog teeb meem heev. Cov ntim thawj yuav tsum tau muab tshem tawm ua ntej nws muab tso rau hauv qhov cub, thiab tom qab ntawd qhov kub yuav tsum tshaj 100 ℃, tab sis qhov kub yuav tsum tsis txhob siab dhau, yog li ntawd PCB yuav tawg vim qhov nthuav dav ntawm cov pa dej thaum ci.

Feem ntau, PCB qhov kub thiab txias feem ntau tau teeb tsa ntawm 120 ± 5 ℃ hauv kev lag luam kom ntseeg tau tias cov dej noo tuaj yeem raug tshem tawm ntawm PCB lub cev ua ntej kab SMT tuaj yeem txuas tau los ntawm cov cua sov rov qab.

Lub sij hawm ci sib txawv nrog cov tuab thiab qhov loj ntawm PCB, thiab rau PCB nrog qhov me me lossis loj me me, pawg thawj coj yuav tsum tau nias nrog qhov hnyav tom qab ci, txhawm rau txo lossis zam qhov xwm txheej ntawm PCB khoov deformation los ntawm kev ntxhov siab tso tawm thaum lub sijhawm PCB txias tom qab ci.

Vim hais tias ib zaug PCB tau hloov pauv thiab khoov, qhov teeb meem ntawm offset lossis tuab tuab yuav tshwm sim thaum SOLDER muab tshuaj txhuam luam tawm ntawm SMT, uas yuav ua rau muaj coob tus vuam luv luv lossis vuam vuam thiab lwm yam xwm txheej tsis zoo.

PCB txheej txheej txheej txheej txheej

At present, the general conditions and time Settings for PCB baking are as follows:

1. PCB yuav tsum raug kaw kom zoo hauv 2 lub hlis txij li hnub tsim khoom. Yog tias PCB tsis tau muab ntim thiab muab tso rau hauv qhov chaw tswj qhov kub thiab txias (≦ 30 ℃/60%RH, raws li IPC-1601) rau ntau dua 5 hnub, nws yuav tsum tau ci ntawm 120 ± 5 ℃ rau 1 teev ua ntej muab tso rau ntawm kab

2. PCB yuav tsum khaws cia ntau dua 2 ~ 6 lub hlis tom qab hnub tsim khoom, thiab yuav tsum tau ci rau 2 teev ntawm 120 ± 5 ℃ ua ntej hauv online.

3. PCB yuav tsum tau khaws cia ntau dua 6 ~ 12 lub hlis, thiab ci rau 4 teev ntawm 120 ± 5 ℃ ua ntej nws mus online.

4, PCB khaws cia ntau dua 12 lub hlis ntawm hnub tsim khoom, feem ntau tsis pom zoo siv, vim tias cov nplaum nplaum ntawm ntau pawg neeg sib tw tab sis yuav muaj hnub nyoog nrog lub sijhawm, cov khoom lag luam tsis ruaj khov thiab lwm yam teeb meem zoo yuav tshwm sim yav tom ntej, nce qhov tshwm sim ntawm kev ua lag luam kho, thiab cov txheej txheem tsim khoom muaj lub rooj sib tsoo tawg thiab tin noj tsis zoo. Yog tias koj yuav tsum tau siv, nws raug nquahu kom ci ntawm 120 ± 5 ℃ rau 6 teev, ntau qhov ua ntej luam tawm cov kab laug sab ua ntej tso rau hauv kev tsim khoom kom ntseeg tau tias tsis muaj teeb meem solder ua ntej txuas ntxiv.

Lwm qhov tsis pom zoo rau PCB ntev heev vim tias nws qhov kev kho saum npoo nrog lub sijhawm thiab maj mam tseem yuav ua tsis tiav, hauv ENIG, lub txee lub neej yog 12 lub hlis, tom qab lub sijhawm no, nyob ntawm nws cov tawv kub txheej tuab, yog tias tuab dua, npib tsib xee txheej tej zaum yuav yog vim cov kis thiab tshwm nyob rau hauv txheej kub thiab oxide tsim, cuam tshuam rau kev ntseeg tau, tsis tuaj yeem ua tsis tau.

5. Txhua lub PCBS ci yuav tsum tau siv tsis pub dhau 5 hnub, thiab PCBS tsis tau ua tiav yuav tsum tau ci ntawm 120 ± 5 ℃ rau lwm 1 teev ua ntej yuav mus online.

Kev sib tsoo ntawm PCB thaum ci

1. PCB loj loj yuav tsum tau muab tso rau hauv kab rov tav thiab teeb tsa thaum ci. Nws tau pom zoo tias qhov ntau kawg ntawm pawg yuav tsum tsis pub ntau dua 30 daim. Vertical baking is not recommended for large size PCB, easy to bend.

2. Thaum ci PCB me me thiab nruab nrab, nws tuaj yeem muab tso rau hauv kab rov tav thiab muab sib dhos, ntau kawg ntawm pawg tsis ntau dua 40 daim, lossis nws tuaj yeem siv ntsug thiab tus lej tsis txwv. Tom qab 10 feeb ntawm ci, nws yog qhov tsim nyog kom qhib lub qhov cub thiab tshem tawm PCB thiab tso nws mus rau qhov txias kom txias.

Cov lus ceeb toom rau PCB ci

1. Qhov ntsuas kub yuav tsum tsis pub dhau Tg taw tes ntawm PCB, thiab feem ntau yuav tsum tsis pub tshaj 125 ℃. Nyob rau theem pib, Tg taw tes ntawm qee cov PCB uas muaj cov hlau lead tau qis, tab sis tam sim no Tg ntawm PCB feem ntau tsis muaj txhuas yog siab dua 150 ℃.

2, tom qab ci PCB yuav tsum tau siv sai li sai tau, yog tias tsis siv, yuav tsum rov ntim lub tshuab kom sai li sai tau. If exposed to the workshop for too long, it must be re-baked.

3, lub qhov cub nco ntsoov teeb tsa cov cuab yeej tso zis kom qhuav, txwv tsis pub cov dej ci ci yuav muab khaws cia rau hauv qhov cub kom nce nws cov txheeb ze txheeb ze, tsis zoo PCB dehumidification.

4. Los ntawm qhov pom ntawm qhov zoo, fresher PCB solder yog, qhov zoo dua yuav zoo dua tom qab dhau los ntawm lub cub tawg. PCB tas sij hawm yuav muaj kev pheej hmoo zoo txawm hais tias nws tau siv tom qab ci.

Cov lus pom zoo rau PCB ci

1. Nws raug nquahu kom ci PCB ntawm 105 ± 5 ℃ tsuav yog cov dej kub npau npau yog 100 ℃. Tsuav yog qhov kub npau npau dhau, dej yuav tig mus ua pa. Vim tias PCBS tsis muaj ntau cov dej molecules, lawv tsis xav tau kub kom ua kom nrawm dua ntawm cov pa roj.

Qhov kub siab dhau lossis qhov ua kom nrawm nrawm yog nrawm heev, tab sis nws yog qhov yooj yim ua kom nthuav dav sai ntawm cov pa dej, uas yog qhov tsis zoo rau qhov zoo, tshwj xeeb tshaj yog rau cov txheej txheem txheej ntau txheej thiab PCB nrog qhov faus qhov. 105 ℃ tsuas yog siab dua qhov kub npau npau ntawm dej, thiab qhov kub tsis txias dhau, uas tuaj yeem ua kom dehumidify thiab txo qhov kev pheej hmoo ntawm oxidation. Thiab hnub no lub peev xwm tswj qhov ntsuas kub tau zoo dua li ua ntej.

2, LEEJ TWG PCB yuav tsum tau ci, yuav tsum pom seb lub ntim puas ntub, uas yog, txhawm rau tshuaj xyuas VACUUM ntim ntawm HIC (Daim Npav Ntsuas Qhov Ntsuas, Daim Npav Ntsuas Qhov Ntsuas) tau qhia tias ntub, yog tias ntim tau zoo, HIC ua tsis qhia tias ntub yog qhov tseeb tuaj yeem ncaj qha online yam tsis muaj ci.

3. Nws raug nquahu kom siv “ncaj” thiab sib sib zog nqus ci rau PCB ci, vim tias tsuas yog txoj hauv kev no tuaj yeem ua kom cua sov ua kom tiav cov txiaj ntsig siab tshaj plaws, thiab cov pa dej yooj yim dua kom ci tawm ntawm PCB. Txawm li cas los xij, rau qhov loj PCBS, nws yuav tsum tau txiav txim siab seb hom ntsug yuav ua rau phaj khoov.

4. Nws tau pom zoo kom muab PCB tso rau hauv qhov chaw qhuav thiab txias sai tom qab ci. Nws yog qhov zoo tshaj plaws los nyem qhov “tiv thaiv phaj khoov” nyob rau sab saum toj ntawm lub rooj tsavxwm, vim tias cov khoom dav dav yog yooj yim nqus cov dej noo los ntawm lub xeev kub mus rau txheej txheem ua kom txias, tab sis qhov txias sai tuaj yeem ua rau pawg thawj coj khoov, xav tau kom ua tiav qhov sib npaug.

Qhov tsis zoo ntawm PCB ci thiab teeb meem xav tau kev txiav txim siab

1. Kev ci yuav ua rau oxidation ntawm PCB txheej txheej, thiab qhov kub siab dua, qhov ci ntev dua yog qhov tsis zoo dua. 2, nws tsis pom zoo kom ua kom sov kub ntawm OSP nto kho lub rooj tsavxwm, vim OSP zaj duab xis yuav ua rau poob lossis ua tsis tiav vim qhov kub siab. Yog tias koj yuav tsum ci, nws pom zoo kom ci ntawm 105 ± 5 ℃ tsis pub ntev tshaj 2 teev. Nws raug nquahu kom siv li ntawm 24 teev tom qab ci.

3, ci tuaj yeem cuam tshuam rau tiam IMC, tshwj xeeb tshaj yog rau HASL (cov tshuaj txau txau), ImSn (tshuaj lom neeg zoo, tin dipping) kho qhov chaw ntawm lub rooj tsavxwm, vim tias nws txheej IMC (tooj liab tin sib xyaw) ua tau zoo li thaum ntxov hauv PCB theem muaj tau tsim tawm, uas yog, ua ntej GENERATION ntawm PCB cov laug, ci yuav ua kom tuab ntawm txheej no tau tsim IMC, Ua rau muaj teeb meem kev ntseeg siab.