Nrog txoj kev loj hlob sai ntawm cov cuab yeej siv hluav taws xob niaj hnub no, PCBA tseem tab tom txhim kho rau qhov ntom ntom ntom ntom thiab muaj kev ntseeg siab. Txawm hais tias tam sim no PCB thiab PCBA kev tsim thev naus laus zis tau txhim kho zoo heev, cov txheej txheem PCB txheej txheem txheej txheem yuav tsis ua rau neeg tuag taus rau cov khoom lag luam tsim tawm. Txawm li cas los xij, rau cov cuab yeej uas muaj tus pin me me sib nrug, qhov tsis tsim nyog tsim ntawm PCB vuam ncoo thiab PCB thaiv lub ncoo yuav ua rau nyuaj ntawm SMT cov txheej txheem vuam thiab ua rau muaj kev pheej hmoo zoo ntawm PCBA nto mount ua.

Hauv kev saib ntawm qhov muaj peev xwm tsim khoom thiab teeb meem kev ntseeg tau tshwm sim los ntawm kev tsim tsis tsim nyog ntawm PCB vuam ncoo thiab thaiv cov ncoo, cov teeb meem kev tsim khoom tuaj yeem zam tau los ntawm kev ua kom zoo dua cov ntim khoom tsim raws li txheej txheem txheej txheem ntawm PCB thiab PCBA. Kev tsim kho kom zoo dua qub los ntawm ob yam, ua ntej, PCB LAYOUT kev tsim kho kom zoo dua qub; Qhov thib ob, PCB engineering kev tsim kho kom zoo. Kev tsim pob raws li IPC 7351 tus qauv lub tsev qiv ntawv pob thiab xa mus rau cov ntaub qhwv me me pom zoo hauv cov cuab yeej tshwj xeeb. Rau kev tsim nrawm, Cov kws tsim qauv tsim qauv yuav tsum nce qhov loj ntawm lub ncoo raws li qhov pom zoo kom hloov kho qhov tsim. Qhov ntev thiab dav ntawm PCB vuam ncoo yuav tsum nce los ntawm 0.1 hli, thiab qhov ntev thiab dav ntawm thaiv vuam ncoo yuav tsum nce ntxiv 0.1 hli raws lub hauv paus ntawm vuam ncoo. Cov txheej txheem PCB tsis kam siv vuam txheej txheem xav tau tias cov ntug ntawm lub ncoo yuav tsum tau npog los ntawm 0.05mm, thiab tus choj nruab nrab ntawm ob daim ntaub yuav tsum loj dua 0.1mm. Hauv kev tsim theem ntawm PCB kev tsim vaj tsev, thaum qhov loj me ntawm cov ntaub qhwv tsis tuaj yeem ua kom zoo dua qub thiab nruab nrab qhov nruab nrab txuas nruab nrab ntawm ob lub pawm tsawg dua 0.1 hli, PCB engineering siv pawg pab pawg phaj phaj tsim kho qhov rooj. Thaum ob lub ncoo ntug sib nrug ntau dua 0.2 hli ncoo, raws li cov ntaub qhwv ntim khoom ntim tsim; Thaum qhov kev ncua deb nruab nrab ntawm ob daim ntaub ntawv tsawg dua 0.2 hli, xav tau kev tsim qauv DFM. DFM kev tsim kho kom zoo dua qub yog qhov muaj txiaj ntsig zoo rau qhov loj me ntawm cov pawm. Ua kom ntseeg tau tias cov khoom siv hluav taws xob sib txuas hauv cov txheej txheem tuaj yeem tsim qhov txheej txheem txheej txheej tsawg kawg thaum PCB tsim. Thaum qhov deb nrug nruab nrab ntawm ob daim ntaub ntau dua 0.2 hli, kev tsim qauv tsim vaj tsev yuav tsum ua raws li qhov xav tau ib txwm muaj; Thaum qhov kev ncua deb nruab nrab ntawm ob daim ntaub ntawv tsawg dua 0.2 hli, xav tau DFM tsim. DFM txoj hauv kev tsim qauv engineering suav nrog kev tsim kho kom zoo ntawm txheej txheej ua haujlwm tsis zoo thiab tooj liab txiav ntawm txheej txheej vuam. Qhov loj ntawm kev txiav tooj liab yuav tsum xa mus rau lub cuab yeej tshwj xeeb. Cov ntawv txiav tooj liab yuav tsum yog nyob hauv qhov ntau ntawm qhov pom zoo tsim, thiab PCB thaiv qhov vuam tsim yuav tsum yog ib leeg-ncoo qhov rai tsim, uas yog, thaiv cov choj tuaj yeem npog ntawm cov ntaub qhwv. Ua kom ntseeg tau tias hauv PCBA cov txheej txheem tsim khoom, muaj kev thaiv cov hlau txuas ntawm ob lub pawm rau kev sib cais, kom tsis txhob vuam zoo li teeb meem zoo thiab teeb meem kev ntseeg tau hluav taws xob. Vuam cov yeeb yaj kiab tsis zoo hauv cov txheej txheem ntawm kev sib dhos tuaj yeem tiv thaiv kev txuas txuas txuas luv, rau qhov siab PCB nrog qhov sib nrug zoo pins, yog tias qhib vuam txuas nruab nrab ntawm cov pins raug cais, PCBA ua cov cog tsis tuaj yeem lav qhov chaw vuam zoo ntawm khoom. Rau PCB cais tawm los ntawm kev qhib vuam ntawm qhov ntom ntom ntom ntom thiab qhov sib nrug zoo pins, tam sim no PCBA kev tsim khoom lag luam txiav txim siab tias cov khoom nkag los ntawm PCB tsis raug thiab tsis tso cai rau tsim online. Txhawm rau zam kev pheej hmoo zoo, PCBA lub Hoobkas tsim khoom yuav tsis lav qhov vuam zoo ntawm cov khoom yog tias cov neeg siv khoom hais kom tso cov khoom online. Nws tau kwv yees tias cov teeb meem ua haujlwm tsis zoo hauv kev tsim khoom ntawm PCBA lub Hoobkas yuav raug daws los ntawm kev sib tham.

Cov ntaub ntawv kawm:

Cov cuab yeej tshwj xeeb phau ntawv me me, ntaus pin nruab nrab qhov sib nrug: 0.65mm, tus pin dav: 0.2 ~ 0.4mm, tus pin ntev: 0.3 ~ 0.5mm. Qhov luaj li cas ntawm cov kab laug sab yog 0.8 * 0.5mm, qhov loj ntawm cov kab laug sab yog 0.9 * 0.6mm, qhov nruab nrab qhov nruab nrab ntawm cov cuab yeej ncoo yog 0.65mm, ntug qhov sib nrug ntawm cov kab laug sab yog 0.15mm, ntug qhov sib nrug ntawm cov ntaub qhwv yog 0.05mm, thiab qhov dav ntawm ib sab laug sab laug tau nce los ntawm 0.05mm. Raws li cov qauv siv vuam vuam tsim, qhov loj me ntawm ib sab vuam ncoo yuav tsum loj dua qhov loj ntawm vuam ncoo 0.05mm, txwv tsis pub yuav muaj kev pheej hmoo ntawm vuam flux npog vuam ncoo. Raws li qhia hauv daim duab 5, qhov dav ntawm kev siv vuam ib leeg yog 0.05mm, uas ua tau raws li qhov xav tau ntawm kev tsim khoom thiab ua tiav. Txawm li cas los xij, qhov nrug nruab nrab ntawm ob daim ntaub qhwv tsuas yog 0.05mm, uas tsis ua tau raws li cov txheej txheem thev naus laus zis ntawm qhov tsawg kawg nkaus tiv thaiv vuam choj. Engineering tsim ncaj qha tsim tag nrho kab ntawm tus pin pin tsim rau pab pawg vuam phaj qhov tsim. Ua lub rooj tsavxwm thiab ua tiav SMT thaj raws li kev tsim qauv tsim qauv. Los ntawm qhov kev ntsuas ua haujlwm, vuam tsis ua tiav ntawm tus nti ntau dua 50%. Ib zaug ntxiv los ntawm kev ntsuas ntsuas ntsuas kub, tuaj yeem tshuaj xyuas ntau dua 5% ntawm qhov tsis xws luag. Thawj qhov kev xaiv yog los tshuaj xyuas qhov pom ntawm lub cuab yeej (20 npaug lub iav tsom iav), thiab nws tau pom tias muaj cov tin tin thiab cov vuam seem ntawm cov pins uas nyob ib sab ntawm lub nti. Qhov thib ob, qhov ua tsis tiav ntawm kev tshuaj xyuas cov khoom lag luam, pom tias qhov ua tsis tiav ntawm tus pin pin luv Circuit Court tau hlawv. Xa mus rau IPC 7351 tus txheej txheem pob ntawv tsev qiv ntawv, tsim los ntawm cov ntaub ntawv pab yog 1.2mm * 0.3mm, tus qauv tsim ntawm lub ncoo thaiv yog 1.3 * 0.4mm, thiab qhov nruab nrab nruab nrab ntawm cov pawm uas nyob ib sab yog 0.65mm. Los ntawm cov qauv tsim saum toj no, qhov loj ntawm kev siv vuam ib leeg 0.05mm ua tau raws li qhov yuav tsum tau ua ntawm PCB txheej txheem thev naus laus zis, thiab qhov loj ntawm qhov txuas vuam ntug sib nrug 0.25mm ua tau raws li qhov xav tau ntawm kev siv tshuab txuas choj. Ua kom qhov kev tsim rov ua dua tshiab ntawm cov vuam choj tuaj yeem txo qis qhov kev pheej hmoo ua kom zoo, yog li txhawm rau txhim kho kev ntseeg tau ntawm cov khoom. Qhov dav ntawm lub koom haum pabcuam vuam ncoo yog tooj liab-txiav, thiab qhov loj ntawm qhov tsis kam ua haujlwm vuam tau hloov kho. Xyuas kom meej tias ntug ntawm ob lub pawm ntawm lub cuab yeej ntau dua 0.2 hli thiab ntug ntawm ob lub pawm ntawm lub cuab yeej ntau dua 0.1 hli. Qhov ntev ntawm cov ntaub qhwv ntawm ob daim ntaub qhwv tsis hloov pauv. Nws tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm PCB tsis kam vuam ib lub phaj qhov rai tsim. Hauv kev saib ntawm cov ntaub qhwv tau hais los saum toj no, ncoo thiab tiv thaiv vuam tsim tau zoo los ntawm cov phiaj xwm saum toj no. Cov ntug kev sib nrug ntawm cov pawm uas nyob ib sab yog ntau dua 0.2mm, thiab ntug qhov sib nrug ntawm cov tsis kam vuam los yog ntau dua 0.1mm, uas tuaj yeem ua tau raws li qhov xav tau ntawm kev tiv thaiv vuam choj tsim cov txheej txheem. Tom qab ua kom zoo txuas cov qauv tsim los ntawm PCB LAYOUT tsim thiab PCB tsim qauv tsim, npaj kom rov ua tau zoo ib yam ntawm PCB, thiab ua tiav kev tsim khoom raws li cov txheej txheem qub.