SS ntawm multilayer PCBs, los ntawm plugging yog ib qho ntawm cov kauj ruam tseem ceeb los xyuas kom meej cov khoom ruaj khov Nyob rau hauv kev tsim proceand lifespan. Raws li cov channel tseem ceeb txuas nrog ntau txheej txheej ntawm cov khoom siv hluav taws xob, qhov zoo ntawm kev txuas ncaj qha cuam tshuam rau kev ua haujlwm hluav taws xob, kev ua haujlwm ruaj khov, thiab kev ntseeg siab ntawm PCB. Kev tsis saib xyuas nyob rau hauv cov txheej txheem plugging tau yooj yim ua rau muaj teeb meem xws li huab cua npuas hauv lub vias, resin shedding, thiab deg depressions, yog li cuam tshuam rau smoothness ntawm cov txheej txheem ntau lawm tom ntej thiab cov khoom kawg. Yog li ntawd, tsim kom muaj kev tshawb fawb thiab kev tswj xyuas zoo rau kev sib txuas, kev ua haujlwm ntawm cov txheej txheem ntawm txhua theem, thiab tam sim ntawd txheeb xyuas qhov tsis xws luag yog qhov tseem ceeb rau kev txhim kho qib kev tsim khoom ntawm multilayer PCBs.
Txheej txheem cej luam ntawm Via Pluging txheej txheem nyob rau hauv Multilayer PCBs Via plugging nyob rau hauv multilayer PCBs yuav sau thiab smoothing lub sab hauv thiab nto ntawm vias siv cov ntaub ntawv thiab txheej txheem. Cov txheej txheem no tiv thaiv cov phab ntsa ntawm phab ntsa, tiv thaiv impurities los ntawm kev nkag mus, thiab txhim kho lub zog ntawm lub rooj tsavxwm. Tam sim no, feem ntau siv los ntawm - cov txheej txheem sau yog feem ntau muab faib ua ob pawg: resin ntawm - filling thiab electroplating ntawm - sau. Cov txheej txheem sib txawv yog tsim rau cov khoom siv sib txawv, tab sis lawv cov kev xav tau zoo yog qhov zoo ib yam: puv puv, tsis muaj qhov tsis xws luag, nruj kev sib raug zoo nrog rau ntawm phab ntsa, thiab du, tiaj tus.
Tus nqi tseem ceeb ntawm ntawm - filling yog nyob rau hauv cais cov vias los ntawm plua plav, noo noo, thiab lwm yam impurities nyob rau hauv ib puag ncig sab nraud los ntawm cov khoom ntim, tiv thaiv kev puas tsuaj rau ntawm phab ntsa lossis teeb meem xws li oxidation thiab corrosion. Nyob rau tib lub sijhawm, qhov du ntawm - puv nto muab lub hauv paus zoo rau kev ua haujlwm tom ntej, txo cov kev pheej hmoo zoo hauv cov txheej txheem tom qab. Muab piv rau ib zaug xwb -txheej PCBs, ntau- txheej PCBs muaj ntau dua ntawm vias thiab ntau cov qauv, ua rau ntawm - txheej txheem txheej txheem nyuaj dua thiab xav tau kev tswj kom zoo dua. Kev tswj hwm nruj yog xav tau ntawm cov khoom siv, khoom siv, thiab kev ua haujlwm.
Kev Tswj Xyuas Zoo ntawm Cov Ntsiab Lus Tseem Ceeb hauv Ntawm - Cov Txheej Txheem Sau
Tswj ntawm Pre-Kev Npaj Ua Ntej
Ua ntej- txheej txheem kev npaj yog lub hauv paus rau kev ua kom paub tseeb ntawm - ua kom zoo, nrog rau cov hauv paus tseem ceeb yog xaiv cov khoom siv thiab cov cuab yeej debugging. Hais txog kev xaiv cov khoom siv, cov ntaub ntawv muab tub lim tsim nyog yuav tsum tau xaiv raws li hom ntawm cov txheej txheem ntsaws. Txawm hais tias siv cov tshuaj resin los yog electroplating, nws yog ib qho tseem ceeb los xyuas kom meej zoo fluidity, adhesion, thiab stability kom tsis txhob muaj teeb meem xws li tsis tiav filling thiab xoob bonding vim cov khoom tsis sib xws. Nyob rau tib lub sijhawm, cov ntaub ntawv yuav tsum tau soj ntsuam nruj ua ntej siv los xyuas cov impurities thiab deterioration, kom ntseeg tau tias lawv ua tau raws li qhov yuav tsum tau ua.
Hais txog cov cuab yeej debugging, ib qho kev tshuaj xyuas thiab ntsuas tag nrho ntawm cov khoom siv ntsaws yog tsim nyog, suav nrog lub tshuab nqus tsev ntsaws, tshuab sib tsoo, thiab cov cuab yeej kho. Lub hom phiaj yuav tsum yog ntawm kev kho cov cuab yeej ua haujlwm tsis zoo kom ua haujlwm ruaj khov thiab ua kom raug, sib tsoo quab yuam, thiab kho qhov kub thiab txias raws li cov txheej txheem. Tsis tas li ntawd, kev ua kom huv ntawm cov cuab yeej yuav tsum tau kuaj xyuas kom tshem tawm cov khoom seem thiab cov impurities, tiv thaiv kev sib kis ntawm PCB kom ua tiav thiab cuam tshuam qhov zoo ntawm kev ntsaws.
Via Phab ntsa Pretreatment Control Via phab ntsa pretreatment yog ib kauj ruam tseem ceeb hauv kev txhim kho lub zog ntawm kev sib txuas ntawm cov khoom muab tub lim thiab ntawm phab ntsa, cuam tshuam ncaj qha rau kev ruaj khov thiab ruaj khov ntawm kev ntsaws. Pretreatment mas suav nrog lub qhov phab ntsa ntxuav thiab nto roughening. Nws yog ib qho tseem ceeb kom tshem tawm cov kab mob xws li roj, oxides, thiab cov khib nyiab los ntawm lub qhov phab ntsa kom tiv thaiv cov impurities los ntawm kev cuam tshuam kev sib txuas ntawm cov khoom muab tub lim rau lub qhov phab ntsa, ua rau muaj qhov tsis xws luag xws li resin detachment thiab electroplating peeling.
Thaum lub sijhawm ntxuav, siv tshuaj ntxuav lossis tshuaj ntxuav ntshav los xyuas kom meej tias cov phab ntsa ntawm lub qhov yog huv si thiab seem-dawb. Deg roughening yuav tsum tsim nyog nce qhov roughness ntawm lub qhov phab ntsa los txhim kho qhov adhesion ntawm cov khoom muab tub lim thiab tiv thaiv cov teeb meem xws li delamination thiab tawg tom qab sau. Tom qab pretreatment, lub qhov phab ntsa zoo yuav tsum tau kuaj xyuas kom paub meej tias tsis muaj cov kab mob thiab kev puas tsuaj ua ntej mus rau cov txheej txheem tom ntej.
Kev Tswj Filling thiab Curing Stages Lub filling theem yog lub hauv paus ntawm lub qhov ntsaws cov txheej txheem. Cov txheej txheem filling tsim nyog yuav tsum raug xaiv raws li hom txheej txheem kom paub meej tias puv puv, tsis muaj cua npuas, thiab tsis muaj voids. Resin plugging feem ntau yog siv lub tshuab nqus tsev siab filling, qhov twg cov resin raug yuam mus rau hauv lub qhov hauv qab lub tshuab nqus tsev, ua kom muaj txiaj ntsig zoo txo cov cua npuas. Electroplating filling yuav tsum tswj kev ruaj ntseg ntawm cov txheej txheem electroplating kom ntseeg tau tias cov tshuaj electroplating tusyees npog cov phab ntsa ntawm lub qhov, ua tiav tiav.
Tom qab ua tiav, cov txheej txheem kho yuav tsum tau ua kom ntseeg tau tias cov khoom siv muab tub lim tag nrho nrog rau lub qhov phab ntsa, tsim cov qauv ruaj khov. Thaum lub sij hawm kho, qhov kub thiab lub sij hawm yuav tsum tau tswj nruj me ntsis kom ua tiav cov khoom muab tub lim, tiv thaiv softening thiab detachment vim tsis txaus curing, los yog tawg vim over-kho. Tom qab kho, kev tshuaj xyuas ua ntej ntawm lub qhov ntsaws qhov chaw yog qhov tsim nyog los txheeb xyuas thiab tshem tawm qhov tsis xws luag xws li protrusions thiab kev nyuaj siab.
Tshaj tawm - kev tswj hwm
Tshaj tawm- kev ua haujlwm feem ntau suav nrog kev sib tsoo thiab ntxuav cov kauj ruam, txhawm rau ua kom tiav qhov du thiab tiaj tus rau kev ua haujlwm tom ntej. Thaum lub sij hawm sib tsoo, kev sib tsoo quab yuam thiab ceev yuav tsum tau tswj kom tsis txhob dhau - sib tsoo thiab ua rau lub qhov phab ntsa los yog lub rooj tsavxwm nto, thaum xyuas kom tshem tawm cov khoom muab tub lim ntau dhau kom lub qhov ntsaws qhov chaw ntws tawm nrog lub rooj tsavxwm.
Tom qab kev sib tsoo, PCB nto yuav tsum tau muab ntxuav kom tshem tawm cov khib nyiab, plua plav, thiab lwm yam impurities tsim thaum sib tsoo, tiv thaiv cov khoom seem ntawm qhov cuam tshuam rau cov txheej txheem tom ntej. Tom qab kev tshaj tawm - ua tiav, kev tshuaj xyuas tag nrho ntawm lub qhov ntsaws qhov zoo yog yuav tsum tau ua kom paub meej tias qhov chaw du, tsis muaj burrs thiab residues, thiab tsis muaj cua npuas thiab voids nyob rau hauv lub qhov, xyuas kom lub plugged qhov zoo raws li cov qauv.
Common Via -Filling Defects and Control Measures
Feem ntau cov teeb meem nyob rau hauv multilayer PCB ntawm - cov txheej txheem sau muaj xws li cua npuas nyob rau hauv lub vias, deg depressions, resin tev, thiab los ntawm kev sib kis. Cov teeb meem no cuam tshuam loj heev rau PCB qhov zoo thiab kev ntseeg siab, xav tau kev tswj xyuas cov phiaj xwm.
Cov npuas npuas hauv lub vias yog ib qho tsis xws luag, feem ntau tshwm sim los ntawm cov khoom siv tsis zoo, lub tshuab nqus tsev tsis txaus, cov dej seem seem lossis impurities ntawm phab ntsa. Kev tswj cov kev ntsuas feem ntau suav nrog kev xaiv cov ntaub ntawv muab tub lim nrog cov dej ntws zoo, ua kom zoo dua cov txheej txheem cov txheej txheem, ua kom lub tshuab nqus tsev txaus, thiab ntxiv dag zog rau ntawm phab ntsa pretreatment kom tshem tawm cov dej noo thiab impurities, txo cov cua npuas tsim.
Kev nyuaj siab saum npoo yog feem ntau tshwm sim los ntawm cov khoom siv muab tub lim kho kom zoo, ntim tsis txaus, lossis sib tsoo ntau dhau. Kev tswj cov kev ntsuas suav nrog kev tswj cov ntim ntim kom zoo, ua kom cov txheej txheem kho kom zoo kom txo tau cov khoom shrinkage, thiab tswj kev sib tsoo kom nruj kom tsis txhob dhau - sib tsoo. Kev nyuaj siab me tuaj yeem kho tau los ntawm kev rov ua dua lossis kev sib tsoo thib ob.
Resin peeling lossis electroplating txheej delamination feem ntau yog vim tsis tiav ntawm phab ntsa pretreatment thiab tsis txaus adhesion ntawm cov khoom muab tub lim thiab ntawm phab ntsa. Tus yuam sij rau kev tiv thaiv thiab tswj kev ntsuas yog nyob rau hauv kev ntxiv dag zog rau kev tu thiab roughening ntawm cov phab ntsa los xyuas kom meej tag nrho kev sib raug zoo ntawm cov khoom muab tub lim thiab cov phab ntsa. Nyob rau tib lub sijhawm, xaiv cov khoom siv muab tub lim tsim nyog thiab ua kom zoo rau kev kho lossis electroplating txheej txheem txhim kho kev sib raug zoo.
Los ntawm qhov paug paug yog tshwm sim los ntawm cov khoom seem, cov plua plav ib puag ncig, thiab kev ua haujlwm tsis raug, uas tuaj yeem cuam tshuam rau kev ua haujlwm zoo ntawm cov txheej txheem tom ntej. Kev tiv thaiv thiab kev tswj xyuas muaj xws li kev txhim kho cov cuab yeej tu thiab kev tswj hwm ib puag ncig tsim khoom, ua qauv txheej txheem kev ua haujlwm kom tsis txhob muaj cov kab mob sib kis los ntawm kev qhib, thiab tshem tawm cov khoom seem hauv qab kom huv si thaum lub sijhawm tu tom ntej.
Tsim kom muaj Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Zoo ntawm ntau txheej PCB los ntawm cov txheej txheem ntsaws yuav tsum tau ua ke thoob plaws hauv tag nrho cov txheej txheem, los ntawm kev npaj thawj zaug thiab kev tsim khoom mus rau kev tshuaj xyuas cov khoom tiav. Yuav tsum tsim kom muaj kev tswj xyuas qhov zoo tshaj plaws los xyuas kom meej tias txhua theem muaj cov qauv ua raws thiab xaiv cov neeg ua haujlwm lub luag haujlwm.
Ua ntej, tsim cov txheej txheem kev khiav hauj lwm, qhia meej meej txog kev khiav hauj lwm specifications, cov kev xav tau zoo, thiab cov neeg muaj lub luag haujlwm rau txhua theem. Qhov no ua kom cov neeg ua haujlwm nruj me ntsis ua raws li cov txheej txheem, txo qhov tsis zoo los ntawm tib neeg kev ua yuam kev. Qhov thib ob, ntxiv dag zog rau cov txheej txheem tshuaj xyuas. Tom qab txhua tus txheej txheem tseem ceeb ua tiav, kev tshuaj xyuas zoo yuav tsum tau ua kom paub meej thiab daws cov teeb meem uas muaj peev xwm, tiv thaiv kom tsis txhob ntws mus rau hauv cov txheej txheem tom ntej.
Ib txhij, ntxiv dag zog rau cov neeg ua haujlwm kev cob qhia txhawm rau txhim kho lawv cov kev txawj ntse thiab kev paub zoo, ua kom lawv paub txog cov txheej txheem kev cai thiab kev tiv thaiv tsis zoo, thiab muaj peev xwm txheeb xyuas tam sim thiab daws qhov txawv txav thaum tsim khoom. Tsis tas li ntawd, tsis tu ncua tswj thiab ntsuas cov cuab yeej tsim khoom kom ntseeg tau ntev - lub sijhawm ua haujlwm ruaj khov thiab lav ntawm plugging zoo.
Nyob rau hauv lub tiav lawm tshuaj xyuas cov khoom, ib tug kev soj ntsuam txoj kev yuav tsum tau saws los xyuas lub filling fullness, nto flatness, thiab lub zog ntawm lub plugged vias ib tug los ntawm ib tug. Cov khoom tsis tsim nyog yuav tsum tau rov ua haujlwm tam sim lossis muab pov tseg kom ntseeg tau tias cov khoom tiav tiav raws li cov qauv.
Kev tswj xyuas zoo ntawm cov txheej txheem ntsaws rau ntau txheej PCBs yog ib txoj haujlwm ua haujlwm nrog cov ntaub ntawv, khoom siv, kev ua haujlwm, thiab kev tshuaj xyuas. Tsuas yog los ntawm kev tswj hwm txhua qhov txuas tseem ceeb, tsim kom muaj kev tswj hwm kev ua tiav, thiab tshawb xyuas tam sim thiab tiv thaiv qhov tsis xws luag tuaj yeem ua rau peb ua kom muaj txiaj ntsig zoo thiab txhim kho tag nrho cov khoom zoo thiab kev ntseeg siab ntawm ntau txheej PCBs. Nrog rau kev txhim kho txuas ntxiv ntawm PCB kev tsim khoom siv thev naus laus zis, los ntawm cov txheej txheem txuas txuas kuj tseem ua kom zoo dua qub, yuav tsum tau ua kom tiav cov kev paub dhau los thiab kev txhim kho cov txheej txheem tswj kom zoo kom haum raws li cov kev xav tau ntawm kev lag luam kev loj hlob.