Ntawm Cov Txheej Txheem hauv Multilayer PCB Fabrication

Vias yog ib qho ntawm cov khoom tseem ceeb ntawmMultilayer PCB fabrication, thiab tus nqi ntawm drilling feem ntau yog 30% mus rau 40% ntawm tus nqi ntawmPCB qauv.Lub viav vias yog lub qhov drilled ntawm tooj liab clad laminate.Nws nqa cov conduction ntawm cov khaubncaws sab nraud povtseg thiab siv rau kev sib txuas hluav taws xob thiab kho cov khoom siv.nplhaib.

Los ntawm cov txheej txheem ntawm multilayer PCB fabrication, vias tau muab faib ua peb pawg, uas yog, qhov, faus qhov thiab los ntawm qhov.Nyob rau hauv multilayer PCB fabrication thiab ntau lawm, ntau ntawm cov txheej txheem muaj xws li ntawm cov roj npog, ntawm plug roj, ntawm qhov rais qhib, resin plug qhov, electroplating qhov filling, thiab lwm yam. Txhua txheej txheem muaj nws tus yam ntxwv.

1. Ntawm npog roj

Cov "roj" ntawm cov roj npog npog yog hais txog cov roj npog ntsej muag, thiab cov roj ntawm lub qhov npog roj yog los npog lub nplhaib ntawm lub qhov ntawm lub qhov nrog cov ntaub npog ntsej muag.Lub hom phiaj ntawm cov roj npog npog yog kom insulate, yog li nws yog ib qho tsim nyog los xyuas kom meej tias cov number case npog ntawm lub nplhaib lub nplhaib yog tag nrho thiab tuab txaus, yog li cov tin yuav tsis lo rau thaj thiab DIP tom qab.Nws yuav tsum tau sau tseg ntawm no tias yog cov ntaub ntawv yog cov ntaub ntawv lossis protel, thaum nws tau xa mus rau cov roj txuas, koj yuav tsum tau tshawb xyuas seb puas muaj lub qhov ntsaws (ncoo) siv ntawm, thiab yog li, koj plug-in qhov yuav npog nrog roj ntsuab thiab tsis tuaj yeem welded.

2. Ntawm qhov rais

Muaj lwm txoj hauv kev los cuam tshuam nrog "ntawm cov roj npog" thaum qhib lub qhov.Lub qhov ntawm lub qhov thiab lub grommet yuav tsum tsis txhob npog nrog solder daim npog qhov ncauj roj.Qhov qhib ntawm lub qhov ntawm lub qhov yuav ua rau kom lub tshav kub dissipation cheeb tsam, uas yog conducive rau tshav kub dissipation.Yog li ntawd, yog hais tias lub tshav kub dissipation yuav tsum tau ntawm lub rooj tsavxwm yog kuj siab, qhov qhib ntawm lub qhov ntawm lub qhov yuav raug xaiv.Tsis tas li ntawd, yog tias koj yuav tsum siv lub multimeter los ua qee qhov kev ntsuas ua haujlwm ntawm lub vias thaum lub sij hawm multilayer PCB fabrication, ces qhib lub vias.Txawm li cas los xij, muaj kev pheej hmoo ntawm kev qhib lub qhov ntawm lub qhov - nws yog ib qho yooj yim ua rau lub ncoo kom luv rau lub tin.

3. Ntawm cov roj ntsaws

Los ntawm kev ntsaws roj, uas yog, thaum lub multilayer PCB tau ua tiav thiab tsim tawm, lub npog ntsej muag lub ntsej muag yog thawj zaug ntsaws rau hauv lub qhov nrog cov ntawv txhuas, thiab tom qab ntawd cov roj npog ntsej muag tau luam tawm ntawm tag nrho lub rooj tsavxwm, thiab tag nrho cov ntawm qhov. yuav tsis kis lub teeb.Lub hom phiaj yog los thaiv cov vias los tiv thaiv cov hlaws hlaws los ntawm kev nkaum hauv qhov, vim tias cov hlaws tin yuav ntws mus rau hauv cov ntaub qhwv thaum lawv yaj ntawm qhov kub thiab txias, ua rau luv luv Circuit Court, tshwj xeeb tshaj yog ntawm BGA.Yog hais tias lub vias tsis muaj tus cwj mem zoo, cov npoo ntawm lub qhov yuav tig liab, ua rau "txim tooj liab raug" phem.Tsis tas li ntawd, yog tias lub qhov ntawm lub qhov ntsaws cov roj tsis ua kom zoo, nws tseem yuav cuam tshuam rau cov tsos.

4. Resin plug qhov

Resin plug qhov tsuas yog txhais tau hais tias tom qab lub qhov phab ntsa yog plated nrog tooj liab, lub qhov ntawm lub qhov yog sau nrog epoxy resin, thiab ces tooj liab yog plated rau saum npoo.Lub hauv paus ntsiab lus ntawm cov resin plug qhov yog tias yuav tsum muaj tooj liab plating hauv lub qhov.Qhov no yog vim hais tias siv cov resin plug qhov hauv PCBs feem ntau yog siv rau BGA qhov chaw.Ib txwm BGA tuaj yeem siv los ntawm PAD thiab PAD txhawm rau xa cov xov hlau mus rau tom qab.Txawm li cas los xij, yog tias BGA ntom dhau thiab Via tsis tuaj yeem tawm mus, nws tuaj yeem raug laum ncaj qha los ntawm PAD.Ua Via mus rau lwm pem teb rau txoj kev cables.Qhov saum npoo ntawm multilayer PCB fabrication los ntawm resin plug qhov txheej txheem tsis muaj dents, thiab lub qhov yuav tsum tau tig rau yam tsis muaj kev cuam tshuam cov soldering.Yog li ntawd, nws yog txaus siab rau qee yam khoom nrog cov txheej txheem siab thiabtuab tuab.

5. Electroplating thiab lub qhov filling

Electroplating thiab filling txhais tau hais tias lub vias tau ntim nrog electroplated tooj liab thaum lub sij hawm multilayer PCB fabrication, thiab hauv qab ntawm lub qhov yog tiaj tus, uas tsis yog tsuas yog conducive rau tsim ntawm stacked qhov thiabnyob rau hauv pads, tab sis kuj pab txhim kho hluav taws xob kev ua tau zoo, cua sov dissipation, thiab kev ntseeg tau.