COB ntim txheej txheem
Hauv tsab xov xwm dhau los, peb tau tham txog COB vuam txoj kev, thiab tom qab ntawd peb yuav tham txog cov txheej txheem ntim COB.
Thawj kauj ruam: nthuav cov siv lead ua. Lub tshuab nthuav dav yog siv los nthuav dav tag nrho LED nti zaj duab xis muab los ntawm cov chaw tsim khoom, yog li cov txheej txheem nruj nruj ntawm LED chips txuas rau saum npoo ntawm zaj duab xis raug rub tawm, uas yog qhov zoo rau cov pos siv lead ua.
Kauj Ruam 2: Adhesive. Muab lub nplhaib nthuav dav rau ntawm qhov chaw ntawm lub tshuab nplaum uas cov txheej txheej nyiaj tau muab pov tseg, thiab siv cov nyiaj muab tshuaj txhuam. Haum rau bulk LED chips. Siv lub dispenser los teev cov nyiaj tsim nyog ntawm cov nyiaj muab tshuaj rau ntawm lub rooj tsav xwm luam tawm ntawm PCB.
Qhov thib peb kauj ruam: Muab lub nplhaib nthuav dav uas npaj nrog cov nyiaj muab tshuaj txhuam rau hauv cov pos hniav siv lead ua, thiab tom qab ntawd tus neeg teb xov tooj yuav tho lub LED nti mus rau PCB luam ntawv Circuit Court board nrog ib tug siv lead ua cwj mem nyob rau hauv lub microscope.
Kauj Ruam 4: Muab cov pierced PCB luam ntawv Circuit Court board nyob rau hauv lub thermal voj voog qhov cub thiab cia nws sawv ntawm qhov kub thiab txias rau ib lub sij hawm, thiab tos kom cov nyiaj muab tshuaj txhuam tawm tom qab kho (tsis txhob cia nws ntev. , txwv tsis pub LED nti txheej yuav ci daj, uas yog: Oxidation yuav ua rau nyuaj rau kev sib txuas). Yog tias muaj LED nti sib txuas, koj yuav tsum ua cov kauj ruam saum toj no; Yog tias koj tsuas muaj IC chip bonding, koj tuaj yeem tshem tawm cov kauj ruam saum toj no.
Kauj ruam tsib: lo lub nti. Siv lub dispenser los tso cov kua nplaum liab (los yog cov kua nplaum dub) rau ntawm IC txoj hauj lwm ntawm lub rooj tsavxwm PCB, thiab tom qab ntawd siv cov khoom siv los tiv thaiv zoo li qub (lub tshuab nqus tsev nqus) kom raug muab IC tuag rau ntawm cov kua nplaum liab. los yog kua nplaum dub.
Kauj ruam thib rau: ziab. Muab cov nplaum tuag rau hauv lub qhov cub thermal, thiab muab tso rau ntawm lub phaj cua sov loj ntawm qhov kub thiab txias rau lub sijhawm, uas tuaj yeem tso cai rau nws kom ruaj khov (rau lub sijhawm ntev).
Kauj ruam xya: Bonding (ie: thaiv). Lub tshuab aluminium hlau sib txuas yog siv los txuas cov nti (LED tuag lossis IC nti) nrog cov ntaub ntawv txhuas hlau ntawm PCB pawg thawj coj saib, uas yog, cov hlau lead hauv COB yog welded.
Kauj ruam yim: pre-test. Siv cov cuab yeej ntsuas tshwj xeeb (cov khoom siv sib txawv rau COB rau cov hom phiaj sib txawv, qhov yooj yim tshaj plaws yog cov khoom siv hluav taws xob ruaj khov) los kuaj COB, thiab rov kho qee cov laug cam uas tsis tsim nyog.
Kauj ruam cuaj: muab tshuaj. Siv lub dispenser los siv qhov tsim nyog ntawm AB kua nplaum rau cov khoom siv hluav taws xob uas twb muaj lawm. Lub IC tau ntim nrog yas, thiab tom qab ntawd ntim raws li tus neeg siv khoom' cov kev cai.
Kauj ruam thib kaum: kho. Muab lub kaw lus PCB luam tawm lub rooj tsavxwm rau hauv lub qhov cub thermal thiab cia nws sawv ntawm qhov kub thiab txias, thiab lub sijhawm ziab sib txawv tuaj yeem tsim raws li qhov yuav tsum tau ua.
Kauj ruam thib kaum: tom qab kev xeem. Tom qab ntawd cov khoom siv PCB uas twb muaj lawm tau raug kuaj xyuas hluav taws xob ua haujlwm siv cov cuab yeej tshuaj xyuas tshwj xeeb kom paub qhov txawv ntawm qhov zoo thiab qhov tsis zoo thiab qhov zoo thiab qhov tsis zoo.
Piv nrog rau lwm yam ntim tshuab, COB thev naus laus zis yog pheej yig dua (tsuas yog li 1/3 ntawm tib lub nti), ntau qhov chaw txuag, thiab paub tab. Txawm li cas los xij, nws yog tsis yooj yim sua rau ib qho kev siv technology tshiab kom zoo meej thaum nws xub tshwm sim. COB thev naus laus zis tseem yuav xav tau cov tshuab vuam ntxiv thiab cov tshuab ntim khoom, qee zaum qhov ceev yuav tsis ceev, thiab PCB qhov yuav tsum tau tso rau ib puag ncig yog nruj dua thiab ua tsis tau. Qhov tsis zoo xws li kev saib xyuas.
Lub nti ntawm lub rooj tsavxwm (COB) layout ntawm qee lub rooj tsavxwm tuaj yeem txhim kho kev ua haujlwm ntawm IC cov cim, vim tias tam sim no lawv tau tshem tawm ib feem loj lossis tag nrho cov pob, uas txhais tau hais tias feem ntau lossis tag nrho cov kab mob parasitic tau raug tshem tawm. Txawm li cas los xij, nrog cov thev naus laus zis no, kuj tseem muaj qee qhov teeb meem kev ua haujlwm. Nyob rau hauv tag nrho cov qauv no, vim yog txhuas thav duab nti los yog BGA logo, lub substrate tej zaum yuav tsis zoo txuas rau VCC los yog hauv av. Cov teeb meem tshwm sim muaj xws li coefficient ntawm thermal expansion (CTE) cov teeb meem thiab kev sib txuas tsis zoo.
