SOLDER BALL DEFECT yog dab tsi?
Lub pob solder yog ib qho ntawm cov teeb meem tshwm sim feem ntau pom thaum siv cov cuab yeej siv saum npoo av rau lub rooj tsav xwm luam tawm. Muaj tseeb rau lawv lub npe, lawv yog ib lub pob ntawm solder uas tau sib cais los ntawm lub cev tseem ceeb uas tsim cov sib koom ua ke fusing nto mount Cheebtsam rau lub rooj tsavxwm.
Solder balls yog cov khoom siv hluav taws xob, txhais tau hais tias yog tias lawv yob ib ncig ntawm lub rooj tsav xwm luam tawm, lawv tuaj yeem ua rau hluav taws xob luv, ua rau muaj kev cuam tshuam rau kev ntseeg siab ntawm cov ntawv luam tawm Circuit Board.
Rau qhovIPC-A-610, PCB nrog ntau tshaj 5 lub pob (<= 0.13mm) nyob rau hauv 600mm² yog qhov tsis xws luag, raws li txoj kab uas hla loj dua 0.13mm ua txhaum txoj cai tsawg kawg nkaus hluav taws xob tshem tawm. Txawm li cas los xij, txawm hais tias cov kev cai no hais tias cov pob qij txha tuaj yeem raug tso tseg yog tias lawv tau daig ntawm qhov ruaj ntseg, tsis muaj txoj hauv kev los paub tseeb tias lawv yog.
YUAV UA LI CAS KHO SOLDER BALLS ua ntej tshwm sim
Solder pob tuaj yeem tshwm sim los ntawm ntau yam, ua rau kev kuaj mob ntawm qhov teeb meem nyuaj. Qee qhov xwm txheej, lawv tuaj yeem ua tiav random. Nov yog qee qhov laj thawj feem ntau ntawm cov khoom siv hauv cov txheej txheem sib dhos PCB.
Cov av noo-Moisturetau dhau los ua ib qho teeb meem loj tshaj plaws rau cov tuam txhab luam tawm Circuit Board niaj hnub no. Ib cag los ntawm cov paj kws paj kws thiab cov microscopic cracking, nws kuj tuaj yeem ua rau cov pob khaus los ntawm kev khiav tawm ntawm huab cua lossis dej. Xyuas kom meej tias cov ntawv luam tawm hauv Circuit Court tau qhuav kom zoo ua ntej daim ntawv thov ntawm cov khoom siv, lossis hloov pauv los tswj cov av noo hauv qhov chaw tsim khoom.
Solder Paste- Cov teeb meem nyob rau hauv lub solder paste nws tus kheej tuaj yeem ua rau muaj kev tsim cov pob zeb. Yog li, nws tsis raug qhia kom rov siv cov tshuaj txhuam hniav los yog tso cai siv cov tshuaj txhuam hniav dhau nws hnub tas sij hawm. Solder paste yuav tsum tau muab khaws cia kom zoo thiab ua raws li cov lus qhia ntawm cov chaw tsim khoom. Cov dej soluble solder paste tuaj yeem ua rau muaj dej ntau dhau.
Stencil Design- Cov pob zeb tuaj yeem tshwm sim thaum lub stencil tau raug ntxuav tsis raug, lossis thaum lub stencil tau luam tawm tsis raug. Yog li ntawd, trusting ibmuaj kev paub luam tawm Circuit Board fabricationthiab lub tsev sib dhos tuaj yeem pab koj kom tsis txhob muaj qhov yuam kev no.
Reflow Temperature Profile- Cov kuab tshuaj flex yuav tsum evaporate ntawm tus nqi raug. Asiab heevlos yog pre-kub tus nqi tuaj yeem ua rau kev tsim cov pob zeb. Txhawm rau daws qhov no, xyuas kom meej tias koj qhov ramp-up tsawg dua 1.5 ° C / sec ntawm qhov nruab nrab ntawm chav tsev kub txog 150 ° C.
SOLDER BALL ROV LOS
Txau hauv cov tshuab cuayog txoj kev zoo tshaj plaws rau tshem tawm cov kab mob sib kis. Cov tshuab no siv lub tshuab cua siab siab uas yuam kom tshem tawm cov khoom siv los ntawm qhov chaw ntawm lub rooj tsav xwm luam tawm ua tsaug rau lawv cov kev cuam tshuam siab.
Txawm li cas los xij, hom kev tshem tawm no tsis zoo thaum lub hauv paus ua rau stems los ntawm misprinted PCBs thiab pre-reflow solder paste teeb meem.
Yog li ntawd, nws yog qhov zoo tshaj plaws los kuaj xyuas qhov ua rau ntawm cov pob qij txha kom ntxov li sai tau, vim tias cov txheej txheem no tuaj yeem cuam tshuam tsis zoo rau koj lub PCB kev tsim khoom thiab kev tsim khoom. Kev tiv thaiv muab cov txiaj ntsig zoo tshaj plaws.
Hla qhov tsis xws nrog IMAGINEERING INC
Ntawm Imagineering, peb nkag siab tias kev paub dhau los yog txoj hauv kev zoo tshaj plaws kom tsis txhob muaj kev ntxhov siab uas tuaj nrog PCB fabrication thiab sib dhos. Peb muab qhov zoo tshaj plaws-hauv-chav kawm kev ntseeg siab hauv kev siv tub rog thiab aerospace, thiab muab kev hloov pauv sai ntawm kev tsim qauv thiab tsim khoom.
Koj puas npaj siab pom qhov sib txawv ntawm kev xav?Tiv tauj peb hnub nokom tau txais ib qho kev tsocai ntawm peb cov PCB fabrication thiab sib dhos txheej txheem.