Hauv IPC-SM-782 muaj ob lub ntsiab lus tseem ceeb "Producibility Levels" thiab "Component Mounting Complexity Levels" (Component Mounting Complexity Levels), uas txawv tab sis muab faib ua peb theem thiab sib txuam. Ob lub ntsiab lus yog siv los piav txog qhov nyuaj ntawm PCBA lub rooj sib txoos, thiab peb theem yog raws li cov cuab yeej siv los ua ke - los ntawm lub qhov cartridge tshuab, kev sib dhos tshuab, thiab hybrid mounting technology.
Ob lub tswv yim no tsis sib haum rau qhov tseeb. Ntawm qhov tod tes, kev siv cov khoom siv cartridge tau dhau los ua tsawg dua; Ntawm qhov tod tes, qhov nyuaj thiab tsis yooj yim los ntawm tib qhov chaw sib sau ua ke ntawm cov suab nrov thiab cov pob suab zoo tau dhau los ntawm qhov nyuaj thiab qhov nyuaj uas tau coj los ntawm kev sib xyaw ntawm daim ntawv thov ntawm cov cartridge thiab cov thev naus laus zis sib dhos. Hauv lwm lo lus, qhov nyuaj ntawm kev tsim khoom siv hluav taws xob niaj hnub no feem ntau yog los ntawm ob qho kev sib tw: Ua ntej, cov khoom siv pob loj tau txais me me thiab me; Qhov thib ob yog cov suab nrov thiab pob zoo pob ntawm tib lub mounting nto ntawm PCB sib xyaw siv. Qhov no tseem yog qhov kev sib tw loj tshaj plaws rau kev tsim PCBA kev tsim khoom niaj hnub no, lub luag haujlwm tseem ceeb ntawm PCBA kev tsim khoom tsim khoom yog los daws cov teeb meem ntawm kev siv cov suab sib xyaw thiab cov pob suab zoo ntawm tib lub mounting nto los ntawm kev xaiv pob thiab cov qauv tsim thiab lwm yam tsim. txhais tau tias.
Mixed degree, uas yog lub ntsiab lus tseem ceeb uas tau hais tseg hauv phau ntawv no, hais txog qhov sib txawv ntawm ntau hom kev ntim khoom sib dhos txheej txheem ntawm PCBA mounting nto, tshwj xeeb yog qhov sib txawv ntawm cov txheej txheem siv hauv kev sib dhos ntawm ntau hom ntim thiab stencil. thickness, qhov ntau dua qhov sib txawv ntawm cov txheej txheem sib dhos, qhov ntau dua qhov sib xyaw ua ke, thiab lwm yam. Qhov ntau dua qhov kev sib xyaw ua ke, cov txheej txheem ntau dua, tus nqi ntau dua.
Qhov sib xyaw ntawm PCBA qhia txog qhov nyuaj ntawm cov txheej txheem sib dhos. Peb feem ntau tham txog PCBA "zoo los yog phem vuam", yeej muaj ob txheej txheej ntawm lub ntsiab lus, ib txheej txhais tau hais tias tsis muaj PCBA ntawm lub qhov rais txheej txheem yog nqaim heev Cheebtsam, xws li zoo pitch Cheebtsam; Lwm txheej txhais tau hais tias PCBA mounting nto ntawm ntau hom ntim cov txheej txheem sib txawv degree.
Qhov siab dua ntawm kev sib xyaw ntawm PCBA, qhov nyuaj dua nws yog txhawm rau txhim kho cov txheej txheem sib dhos ntawm txhua hom pob, qhov txheej txheem tsis zoo. Ua piv txwv, xws li xov tooj ntawm tes PCBA, txawm hais tias cov khoom siv ntawm lub xov tooj ntawm tes board yog cov suab zoo lossis cov khoom me me, xws li 01005, 0201, 0.4mm CSP, PoP, txhua pob yog qhov nyuaj heev. assemble, tab sis lawv cov txheej txheem yuav tsum muaj nyob rau tib theem ntawm complexity, cov txheej txheem ntawm mixed los ua ke degree yog tsis siab, cov txheej txheem ntawm txhua pob yuav optimized tsim, qhov kawg Lub rooj sib txoos yield yuav siab heev. Nyob rau hauv rooj plaub ntawm kev sib txuas lus PCBAs, txawm hais tias qhov luaj li cas ntawm cov khoom siv yog qhov loj, cov txheej txheem sib xyaw yog siab dua thiab cov ntaiv stencil yuav tsum tau sib dhos. Vim qhov nyuaj ntawm qhov sib txawv ntawm qhov sib txawv thiab cov khoom siv stencil, nws yog qhov nyuaj rau kev ua tau raws li tus neeg xav tau ntawm txhua lub pob, thiab cov txheej txheem kev daws teeb meem kawg feem ntau yog cov kev daws teeb meem uas saib xyuas cov kev xav tau ntawm ntau yam txheej txheem ntim, es tsis yog qhov kev daws teeb meem zoo. , thiab kev sib dhos yield yuav tsis siab heev. Qhov no yog qhov tseem ceeb ntawm lub tswv yim ntawm kev sib xyaw ua ke degree.
Qhov kev xav tau yooj yim rau kev xaiv pob yog nruab cov pob khoom nrog cov txheej txheem zoo sib xws ntawm tib lub rooj sib dhos. Hauv theem tsim kho vajtse, tsim cov pob tsim nyog yog thawj kauj ruam hauv kev tsim khoom tsim khoom.
PCBA qhov sib xyaw ua ke ntawm kev sib dhos, nrog tib lub rooj sib dhos ntawm PCB cov khoom siv hauv qhov zoo tagnrho stencil thickness ntawm qhov sib txawv siab tshaj plaws los hais, qhov sib txawv ntau dua, qhov ntau dua qhov sib xyaw ua ke, cov txheej txheem tsis zoo.
Qhov loj ntawm stencil thickness sib txawv, qhov nyuaj rau optimize cov txheej txheem. Qhov nyuaj ntawm cov txheej txheem tsis tau txhais hais tias cov kauj ruam stencil yog qhov nyuaj rau tsim, tab sis qhov ntau dua qhov tuab ntawm cov kauj ruam stencil, qhov nyuaj dua nws yog los lav qhov kev luam ntawv zoo ntawm solder paste. Qhov zoo tshaj plaws, cov kauj ruam tuab ntawm cov kauj ruam stencil yuav tsum tsis pub tshaj 0.05mm (2mil)
Kev tsim ntawm stencil thickness feem ntau yog xam los ntawm ob yam, uas yog cov khoom siv tus pin spacing thiab coplanarity ntawm pob. Cov khoom siv tus pin qhov sib nrug thiab stencil qhov rais cheeb tsam muaj qee qhov kev sib txuas lus, qhov tseem ceeb txiav txim siab qhov siab tshaj plaws thickness tus nqi uas yuav siv tau, thiab lub coplanarity ntawm pob txiav txim siab qhov tsawg kawg nkaus thickness tus nqi uas yuav siv tau. Txij li thaum lub stencil thickness tsis yog tsim raws li ib qho kev tivthaiv tus pin spacing, qhov sib xyaw degree tsis tuaj yeem txiav txim siab los ntawm qhov loj ntawm qhov sib txawv, tab sis nws tuaj yeem siv los ua ib qho kev siv rau kev xaiv pob khoom.
Lub tswv yim no muaj lub ntsiab lus tseem ceeb rau kev xaiv cov pob khoom thiab cov txheej txheem ntawm cov khoom. Peb cia siab tias qhov me me qhov sib txawv ntawm cov txheej txheem pob ntawm tib lub rooj sib dhos, qhov zoo dua.
Zhejiang NeoDen Technology Co., Ltd. tau raug tsim thiab xa tawm ntau yam me me thiab qhov chaw tshuab txij li xyoo 2010. Ua kom zoo dua ntawm peb tus kheej muaj kev paub txog R&D, kev cob qhia zoo, NeoDen yeej lub koob npe nrov los ntawm cov neeg siv khoom thoob ntiaj teb.
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