Kev ua qhov ua lub luag haujlwm hauv kev sib txuas thiab kev sib txuas, uas tsis yog tsuas yog txhawb kev txhim kho ntawm kev lag luam hluav taws xob, tab sis kuj txhawb kev txhim kho ntawm PCBs, thiab tso cov kev xav tau siab dua ntawm cov txheej txheem tsim khoom thiab nto mount thev naus laus zis ntawm cov ntawv luam tawm. Cov txheej txheem Via lub qhov ntsaws tau tshwm sim, thiab nws yuav tsum ua raws li cov cai hauv qab no: (1) tooj liab txaus nyob rau hauv lub qhov hluav taws xob, thiab lub npog ntsej muag tuaj yeem ntsaws lossis tsis tau;
(2) Yuav tsum muaj cov tin thiab txhuas nyob rau hauv lub qhov hluav taws xob, nrog rau qhov yuav tsum tau muaj thickness (4 microns), thiab yuav tsum tsis txhob muaj lub npog ntsej muag tus number case nkag mus rau hauv lub qhov, ua rau cov hlaws dai rau hauv lub qhov;
(3) Lub qhov hluav taws xob yuav tsum muaj lub ntsej muag lub ntsej muag lub ntsej muag lub qhov, uas tsis yog pob tshab, thiab yuav tsum tsis txhob muaj cov nplhaib, cov hlaws dai, lossis cov kev xav tau ntawm lub tiaj tus.
Nrog rau txoj kev loj hlob ntawm cov khoom siv hluav taws xob mus rau "lub teeb, nyias, luv luv, thiab me" kev taw qhia, PCBs tseem tab tom txhim kho mus rau qhov siab ceev thiab nyuaj siab. Yog li ntawd, ib tug loj tus naj npawb ntawm SMT thiab BGA PCBs tau tshwm sim, thiab cov neeg muas zaub yuav tsum tau plug qhov thaum mounting Cheebtsam, uas yog feem ntau pab tsib lub hom phiaj:
(1) Tiv thaiv luv luv Circuit Court tshwm sim los ntawm tin nkag mus rau hauv cov khoom nto los ntawm qhov conductive lub sij hawm PCB ncov soldering; Tshwj xeeb tshaj yog thaum peb tso qhov dhau-qhov ntawm BGA ncoo, peb yuav tsum xub ua lub qhov ntsaws thiab tom qab ntawd kub-phaj nws los pab BGA vuam.
(2) Tsis txhob flux residue nyob rau hauv lub conductive qhov;
(3) Tom qab qhov chaw mounting thiab cov khoom sib dhos ntawm lub tshuab hluav taws xob ua tiav, PCB yuav tsum tau nqus ntawm lub tshuab kuaj kom tsim qhov tsis zoo ua ntej nws tuaj yeem ua tiav:
(4) Tiv thaiv cov nplaum nplaum nplaum nplaum los ntawm ntws mus rau hauv lub qhov, ua rau cov khoom siv virtual thiab cuam tshuam rau kev teeb tsa;
(5) Tiv thaiv cov hlaws hlaws los ntawm cov hlaws tawm thaum lub sijhawm ua haujlwm siab, ua rau luv luv.
Plug qhov tau muab faib ua cov ntsaws ntsaws qhov thiab electroplating plug qhov.
Resin plug qhov: Siv cov kuab tshuaj tsis muaj kuab tshuaj los ntsaws qhov tsis tuaj yeem daws cov teeb meem nyuaj ntawm kev sau tus number case, tab sis kuj txo qhov kev pheej hmoo ntawm tus number case cracking los ntawm tshav kub. Nws yog feem ntau siv rau apertures nrog loj nam piv.
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Cov txiaj ntsig ntawm resin plug qhov:
1. Kev siv cov ntsaws ruaj ruaj rau ntawm cov txheej txheem ntau txheej BGA tuaj yeem txo qhov kev ncua deb ntawm qhov thiab daws qhov teeb meem ntawm cov xov hlau thiab thaiv;
2. Qhov kev tsis sib haum xeeb ntawm kev tswj xyuas qhov tuab ntawm cov txheej nruab nrab uas tuaj yeem sib npaug ntawm qhov siab thiab tsim cov txheej txheem sab hauv HDI faus qhov filling nplaum;
3. Qhov dhau-qhov nrog lub rooj tsavxwm loj tuaj yeem txhim kho kev ntseeg tau ntawm cov khoom;
4. Cov txheej txheem ntawm kev siv cov resin plug qhov hauv PCB feem ntau yog vim BGA qhov chaw, raws li cov tsoos BGA tuaj yeem ua rau VIA ntawm PAD thiab PAD mus rau sab nraum qab rau kev xaim. Txawm li cas los xij, yog tias BGA ntom dhau thiab VIA tsis tuaj yeem tawm mus, nws tuaj yeem ncaj qha drilled los ntawm PAD kom VIA mus rau lwm txheej rau kev xaim, thiab tom qab ntawd cov qhov tuaj yeem ntim nrog cov resin thiab plated nrog tooj liab los ua PAD. Qhov no feem ntau hu ua txheej txheem VIP (ntawm hauv ncoo). Yog tias tsuas yog VIA yog tsim los ntawm PAD yam tsis muaj qhov ntsaws ntsaws qhov, nws yooj yim ua rau tin to, luv luv rau sab nraub qaum, thiab khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.
Cov txheej txheem ntawm PCB resin plugging qhov muaj xws li drilling, electroplating, plugging, ci, thiab sib tsoo. Tom qab drilling, lub qhov yog plated, ces cov resin yog ntsaws thiab ci, thiab thaum kawg cov resin yog av tiaj tus. Cov av resin tsis muaj tooj liab, yog li ib txheej ntawm tooj liab ntxiv yog coated kom tig mus rau hauv PAD. Cov txheej txheem no tau ua tiav ua ntej thawj txheej txheem PCB drilling, uas yog thawj zaug kho lub qhov yuav tsum tau ntsaws, thiab tom qab ntawd laum lwm qhov, ua raws li cov txheej txheem ib txwm muaj.
Yog tias lub qhov ntsaws ntsaws tsis zoo thiab muaj cov npuas hauv lub qhov, lub rooj tsavxwm tuaj yeem tawg thaum hla lub qhov cub tawg vim tias cov npuas ua rau nws nqus dej. Txawm li cas los xij, thaum lub sij hawm ntsaws lub qhov, yog tias muaj npuas hauv lub qhov, cov resin yuav raug nyem tawm thaum lub sij hawm ci, ua rau muaj qhov xwm txheej uas ib sab yog concave thiab lwm sab yog protruding. Lub sijhawm no, cov khoom tsis raug tuaj yeem tshawb pom, thiab cov laug cam uas muaj npuas yuav tsis zoo li tawg vim lub ntsiab ua rau tawg yog noo noo. Yog li ntawd, yog hais tias ib tug tshiab tsim board los yog board yog ci thaum lub sij hawm thauj khoom, feem ntau nws yuav tsis ua rau tawg.
Electroplating qhov filling: Tam sim no, qhov kev ua tiav yog ua los ntawm kev siv cov yam ntxwv ntawm cov khoom ntxiv los tswj kev loj hlob ntawm ntau qhov chaw ntawm tooj liab. Feem ntau yog siv rau kev nruam ntau txheej txheej fabrication (dig muag qhov txheej txheem) los yog siab tam sim no tsim.
Qhov zoo ntawm electroplating qhov filling:
1. Muaj txiaj ntsig zoo rau kev tsim cov khoom sib dhos thiab qhov ntawm lub disc;
2. Kev txhim kho hluav taws xob ua haujlwm pab nrog kev tsim qauv siab;
3. Pab nrog cua kub dissipation;
4. Lub qhov ntsaws thiab qhov hluav taws xob sib txuas tau ua tiav hauv ib kauj ruam;
5. Lub qhov muag tsis pom yog muaj cov electroplated tooj liab, uas muaj kev ntseeg siab dua thiab zoo dua conductivity dua li cov nplaum nplaum.
Yog li, cov txheej txheem ntawm ntsaws los ntawm qhov hauv PCB Circuit Board tau ua tiav li cas?
1, Cua kub leveling thiab plugging txheej txheem
Cov txheej txheem no yog: board nto solder daim npog qhov ncauj → HAL → plug qhov → kho. Kev tsim khoom yog nqa tawm siv cov txheej txheem tsis yog lub qhov ntsaws, thiab tom qab cua kub leveling, aluminium mesh daim hlau los yog number case blocking nets yog siv los ua kom tiav cov plug qhov rau tag nrho cov fortresses. Plug number case tuaj yeem siv nrog tus cwj mem photosensitive lossis thermosetting number case. Cov txheej txheem no tuaj yeem ua kom ntseeg tau tias lub qhov hluav taws xob tsis plam cov roj tom qab cua kub theem, tab sis nws yog qhov ua rau ua rau muaj kuab paug thiab tsis sib xws ntawm lub rooj tsavxwm, uas tuaj yeem ua rau lub tshuab hluav taws xob hauv lub sijhawm teeb tsa.
2, Cua kub leveling pem hauv ntej plug qhov txheej txheem
1. Siv cov ntawv txhuas los ntsaws qhov, kho, thiab hloov cov qauv tom qab sib tsoo lub rooj tsavxwm
Cov txheej txheem no siv lub tshuab CNC drilling los laum cov ntawv txhuas uas yuav tsum tau ntsaws, ua cov phaj mesh, thiab ntsaws lub qhov; Plug number case kuj tseem siv tau nrog cov thermosetting number case, uas muaj qhov tawv tawv thiab zoo adhesion rau lub qhov phab ntsa. Cov txheej txheem ntws raws li hauv qab no: kev kho ua ntej → ntsaws qhov → sib tsoo phaj → qauv hloov → etching → phaj saum npoo solder daim npog qhov ncauj
Txoj kev no tuaj yeem ua kom ntseeg tau tias lub qhov txuas ntawm lub qhov yog tiaj tus, theem nrog cua kub, thiab yuav tsis muaj teeb meem zoo xws li roj tawg lossis roj poob ntawm lub qhov ntug. Txawm li cas los xij, cov txheej txheem no yuav tsum tau ua kom tuab ntawm tooj liab ib zaug, yog li nws yuav tsum tau ua kom muaj tooj liab plating siab rau tag nrho lub rooj tsavxwm.
2. Tom qab ntsaws lub qhov nrog cov ntawv txhuas, ncaj qha tshuaj ntsuam solder npog qhov chaw ntawm lub rooj tsavxwm
Cov txheej txheem no siv lub tshuab CNC drilling tshuab txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau nws cov txheej txheem nws Qhov saum npoo ntawm lub vijtsam luam ntawv phaj yog ncaj qha soldered nrog 36T npo; Cov txheej txheem ntws yog: ua ntej kho - ntsaws qhov - tshuaj ntsuam luam ntawv - ua ntej ziab - raug - kev loj hlob - kho.
Cov txheej txheem no tuaj yeem ua kom ntseeg tau tias lub qhov npog qhov hluav taws xob zoo yog oiled, lub qhov ntsaws yog tiaj tus, thiab tom qab cua kub theem, nws tuaj yeem xyuas kom meej tias lub qhov hluav taws xob tsis yog soldered thiab tsis muaj cov hlaws dai hauv lub qhov. Txawm li cas los xij, nws yog ib qho yooj yim los ua tus number case rau solder pads hauv lub qhov tom qab kho, ua rau tsis zoo solderability.
3. Aluminium ntawv plugging, kev loj hlob, pre curing, thiab nto vuam tom qab sib tsoo
Siv lub tshuab CNC drilling los laum cov ntawv txhuas uas yuav tsum tau ntsaws qhov, ua lub phaj mesh, thiab nruab rau ntawm lub tshuab luam ntawv hloov pauv rau lub qhov ntsaws; Lub qhov ntsaws yuav tsum yog tag nrho, protruding ntawm ob sab, thiab tom qab ntawd kho thiab hauv av rau kev kho saum npoo. Cov txheej txheem ntws raws li hauv qab no: kev kho ua ntej - ntsaws qhov - ua ntej ziab - kev loj hlob - pre curing - board nto solder daim npog qhov ncauj.
Cov txheej txheem no siv lub qhov ntsaws ruaj ruaj kom ntseeg tau tias cov roj tsis poob los yog tawg los ntawm qhov dhau-qhov tom qab HAL; Tab sis tom qab HAL, nws yog qhov nyuaj los daws qhov teeb meem ntawm cov hlaws hlaws hauv qhov los ntawm qhov thiab cov tin ntawm lub qhov.
4. Ib txhij ua tiav ntawm lub npog ntsej muag thiab ntsaws lub qhov ntawm lub rooj tsavxwm
Txoj kev no siv lub vijtsam 36T (43T), ntsia rau ntawm lub tshuab luam ntawv npo, siv lub ncoo lossis ntsia thawv txaj. Thaum ua tiav qhov saum npoo ntawm lub rooj tsavxwm, tag nrho los ntawm qhov yog ntsaws; Cov txheej txheem ntws yog: ua ntej kho - tshuaj ntsuam luam ntawv - ua ntej ziab - raug - kev loj hlob - kho.