Conductive qhov Via qhov tseem hu ua via qhov. Txhawm rau ua kom tau raws li cov neeg siv khoom xav tau, lub rooj tsav xwm Circuit Court ntawm lub qhov yuav tsum tau ntsaws. Tom qab ntau qhov kev xyaum, cov txheej txheem kev sib txuas ntawm txhuas txhuas tau hloov pauv, thiab lub rooj tsav xwm Circuit Court saum npoo ntawm lub npog ntsej muag thiab ntsaws yog ua tiav nrog dawb mesh. qhov. ruaj khov ntau lawm thiab txhim khu kev qha zoo.

Via qhov plays lub luag hauj lwm ntawm interconnection thiab conduction ntawm kab. Txoj kev loj hlob ntawm kev lag luam hluav taws xob kuj txhawb kev txhim kho ntawm PCB, thiab tseem tso siab rau cov kev xav tau siab dua ntawm cov txheej txheem luam ntawv board manufacturing thiab nto mount technology. Ntawm lub qhov ntsaws tshuab tau los ua, thiab yuav tsum ua tau raws li cov hauv qab no:

(1) Tsuas muaj tooj liab nyob rau hauv lub qhov, thiab lub npog ntsej muag tuaj yeem ntsaws lossis tsis ntsaws;
(2) Yuav tsum muaj tin-lead nyob rau hauv lub qhov, nrog rau tej yam thickness yuav tsum tau (4 microns), thiab tsis muaj solder daim npog qhov ncauj number case yuav tsum nkag mus rau hauv lub qhov, ua rau tin hlaws dai nyob rau hauv lub qhov;
(3) Lub qhov los ntawm qhov yuav tsum muaj lub ntsej muag lub ntsej muag lub ntsej muag lub qhov, opaque, thiab yuav tsum tsis txhob muaj tin rings, tin hlaws, thiab qhov yuav tsum tau flatness.

Nrog rau kev txhim kho cov khoom siv hluav taws xob hauv kev coj ntawm "nyias, nyias, pcbs kuj tau tsim mus rau qhov siab thiab qhov nyuaj. 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 ntsaws thaum mounting Cheebtsam, feem ntau tsib lub zog:

(1) Tiv thaiv luv luv Circuit Court los ntawm tin dhau los ntawm cov khoom siv saum npoo ntawm lub qhov thaum lub PCB yog yoj soldered; tshwj xeeb tshaj yog thaum peb muab tso rau ntawm qhov ntawm BGA ncoo, peb yuav tsum xub ua lub qhov ntsaws thiab tom qab ntawd kub-plated los pab txhawb BGA soldering.

(2) Tsis txhob flux residue nyob rau hauv lub vias;
(3) Tom qab qhov chaw mounting ntawm lub tshuab hluav taws xob thiab kev sib dhos ntawm cov khoom tiav, PCB yuav tsum tau nqus los ua qhov tsis zoo ntawm lub tshuab kuaj kom tiav:
(4) Tiv thaiv cov nplaum nplaum nplaum los ntawm kev ntws mus rau hauv lub qhov, ua rau tsis muaj kev sib tsoo thiab cuam tshuam rau qhov chaw;
(5) Tiv thaiv cov tin hlaws los ntawm popping thaum lub sij hawm yoj soldering, ua rau luv luv Circuit Court.

Rau saum npoo mount boards, tshwj xeeb tshaj yog cov mounting ntawm BGA thiab IC, ntawm lub qhov ntsaws yuav tsum tiaj tus, convex thiab concave ntxiv los yog rho tawm 1mil, thiab yuav tsum tsis muaj liab tin ntawm ntug ntawm lub qhov; lub viav vias hides lub pob tin, txhawm rau kom ncav cuag cov neeg siv khoom Cov txheej txheem ntawm ntsaws ntawm qhov tuaj yeem piav qhia ntau yam. Cov txheej txheem ntws yog qhov tshwj xeeb ntev thiab kev tswj cov txheej txheem nyuaj. Feem ntau muaj teeb meem xws li cov roj poob thaum lub sij hawm cua kub leveling thiab ntsuab roj solder kuj thwmsim; roj tawg tom qab kho. Tam sim no raws li cov xwm txheej tiag tiag ntawm kev tsim khoom, ntau cov txheej txheem ntsaws ntawm PCB tau sau tseg, thiab qee qhov kev sib piv thiab kev piav qhia tau ua hauv cov txheej txheem thiab qhov zoo thiab qhov tsis zoo:
Lus Cim: Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm huab cua kub yog siv cov cua kub kom tshem tawm cov khoom siv ntau dhau ntawm qhov chaw thiab qhov ntawm lub rooj tsav xwm luam tawm, thiab cov khoom seem yog coated sib npaug ntawm cov ntaub qhwv, cov kab uas tsis muaj zog thiab cov ntsiab lus ntim, uas yog txoj kev kho saum npoo ntawm cov ntawv luam tawm Circuit Board ib qho.

I. Qhov ntsaws txheej txheem tom qab cua kub leveling

Cov txheej txheem ntws yog: board nto solder daim npog qhov ncauj → HAL → ntsaws qhov → kho. Cov txheej txheem tsis-plug yog saws rau kev tsim khoom. Tom qab cov cua kub yog leveled, lub txhuas ntawv tshuaj ntsuam los yog tus number case thaiv cov ntxaij vab tshaus yog siv los ua kom tiav ntawm lub qhov plugging xav tau los ntawm cov neeg muas zaub rau tag nrho cov fortresses. Tus cwj mem ntsaws tuaj yeem yog tus cwj mem photosensitive lossis thermosetting number case. Nyob rau hauv cov ntaub ntawv ntawm kom ntseeg tau cov xim ntawm cov ntaub ntub dej, nws yog qhov zoo tshaj plaws los siv tib tus cwj mem raws li lub board nto. Cov txheej txheem no tuaj yeem ua kom ntseeg tau tias lub qhov los ntawm qhov yuav tsis plam cov roj tom qab cua kub yog leveled, tab sis nws yog ib qho yooj yim ua rau lub plug qhov number case kom paug cov board nto thiab tsis sib xws. Cov neeg siv khoom muaj feem xyuam rau cov khoom cuav (tshwj xeeb tshaj yog hauv BGA) thaum mounting. Yog li ntau tus neeg siv khoom tsis lees txais cov qauv no.

II. Cua kub leveling pem hauv ntej plug qhov txheej txheem

1. Siv cov ntawv txhuas los ntsaws lub qhov, khov kho, thiab polish lub rooj tsavxwm rau cov qauv hloov
Cov txheej txheem thev naus laus zis no siv lub tshuab CNC drilling los laum tawm cov ntawv txhuas uas yuav tsum tau ntsaws los ua ib qho screen, thiab ntsaws lub qhov kom paub meej tias lub qhov ntawm lub qhov puv. Lub plug qhov number case kuj tseem siv tau nrog cov thermosetting number case, thiab nws cov yam ntxwv yuav tsum muaj zog. , Lub shrinkage ntawm cov resin yog me me, thiab lub zog sib txuas nrog lub qhov phab ntsa yog qhov zoo. Cov txheej txheem ntws yog: kev kho ua ntej → ntsaws qhov → sib tsoo phaj → qauv hloov → etching → board nto solder daim npog qhov ncauj. Txoj kev no tuaj yeem ua kom ntseeg tau tias lub qhov ntsaws ntawm lub qhov ntawm lub qhov yog tiaj tus, thiab yuav tsis muaj teeb meem zoo xws li cov roj tawg thiab cov roj poob rau ntawm ntug ntawm lub qhov thaum lub sij hawm cua kub leveling. Txawm li cas los xij, cov txheej txheem no yuav tsum tau ua kom tuab ib zaug ntawm tooj liab los ua kom cov tooj liab tuab ntawm lub qhov phab ntsa raws li tus neeg siv khoom tus qauv. Yog li ntawd, qhov yuav tsum tau ua rau tooj liab plating ntawm tag nrho cov phaj yog siab heev, thiab cov kev ua tau zoo ntawm lub phaj sib tsoo tshuab kuj yog siab heev, kom ntseeg tau tias cov resin ntawm tooj liab nto raug tshem tawm tag nrho, thiab tooj liab nto yog huv si thiab tsis muaj kuab paug. . Ntau lub chaw tsim khoom PCB tsis muaj cov txheej txheem ua tooj liab ib zaug, thiab kev ua haujlwm ntawm cov khoom siv tsis tau raws li qhov yuav tsum tau ua, ua rau tsis siv ntau ntawm cov txheej txheem no hauv PCB factories.

2. Siv cov ntawv txhuas los ntsaws lub qhov thiab ncaj qha tshuaj ntsuam luam tawm lub rooj tsavxwm saum npoo ntawm lub npog ntsej muag
Cov txheej txheem no siv lub tshuab CNC drilling los laum tawm cov ntawv txhuas uas yuav tsum tau ntsaws los ua ib qho screen, nruab rau ntawm lub tshuab luam ntawv los ntsaws lub qhov, thiab nres nws tsis pub dhau 30 feeb tom qab lub ntsaws tiav, thiab siv 36T screen ncaj qha rau saum npoo ntawm lub rooj tsavxwm. Cov txheej txheem ntws yog: pretreatment-plug qhov-silk screen-pre-baking-exposure-development-kho
Cov txheej txheem no tuaj yeem ua kom ntseeg tau tias lub qhov ntawm lub qhov yog zoo npog nrog roj, lub qhov ntsaws yog tiaj tus, thiab cov xim ntub dej yog zoo ib yam. Tom qab cov cua kub yog leveled, nws muaj peev xwm xyuas kom meej tias lub qhov ntawm lub qhov yog tsis tinned, thiab lub qhov tsis nkaum tin hlaws, tab sis nws yog ib qho yooj yim ua rau tus number case nyob rau hauv lub qhov tom qab curing lub soldering pads ua rau tsis zoo solderability; Tom qab cua kub yog leveled, cov npoo ntawm vias bubbling thiab roj raug tshem tawm. Nws yog ib qho nyuaj rau kev tswj cov khoom los ntawm cov txheej txheem no. Cov txheej txheem engineers yuav tsum siv cov txheej txheem tshwj xeeb thiab cov kev ntsuas kom ntseeg tau tias qhov zoo ntawm lub qhov ntsaws.

3. Cov ntawv txhuas yog ntsaws rau hauv lub qhov, tsim, kho ua ntej, thiab polished ua ntej lub ntsej muag solder.
Siv lub tshuab CNC drilling los laum tawm cov ntawv txhuas uas yuav tsum tau ntsaws qhov los ua ib qho screen, nruab rau ntawm lub tshuab luam ntawv hloov pauv rau ntsaws qhov. Lub plugging qhov yuav tsum yog tag nrho thiab protruding ntawm ob sab. Tom qab kho, lub rooj tsavxwm yog av rau saum npoo. Cov txheej txheem ntws yog: pre-kho-plug qhov-pre-baking-development-pre-curing-board nto solder resist. Vim tias cov txheej txheem no siv qhov ntsaws qhov kho kom ntseeg tau tias qhov dhau ntawm qhov tom qab HAL tsis poob lossis tawg, tab sis tom qab HAL, Nws yog ib qho nyuaj los daws qhov teeb meem ntawm cov hlaws dai hauv qhov ntawm qhov thiab tin ntawm qhov, yog li ntau tus neeg siv khoom ua. tsis txais lawv.

4. board nto solder daim npog qhov ncauj thiab lub qhov ntsaws yog ua tiav tib lub sijhawm.
Txoj kev no siv lub vijtsam 36T (43T), ntsia rau ntawm lub tshuab luam ntawv, siv lub phaj nraub qaum lossis ntsia thawv txaj, thaum ua tiav lub rooj tsavxwm saum npoo, ntsaws tag nrho los ntawm qhov, cov txheej txheem ntws yog: pretreatment-silk screen- -Pre- baking-exposure-development-curing. Lub sijhawm txheej txheem yog luv, thiab kev siv cov khoom siv yog siab. Nws tuaj yeem ua kom ntseeg tau tias lub qhov los ntawm qhov yuav tsis plam cov roj thiab lub qhov los ntawm qhov yuav tsis raug tinned tom qab cua kub yog leveled, tab sis vim hais tias cov silk screen yog siv rau plugging, muaj ib tug loj npaum li cas ntawm huab cua nyob rau hauv lub vias. Thaum kho, huab cua nthuav dav thiab tawg los ntawm lub npog ntsej muag, ua rau cov kab noj hniav thiab qhov tsis sib xws. Yuav muaj ib qho me me ntawm cov tin los ntawm qhov rau cua kub leveling. Tam sim no, tom qab ntau qhov kev sim, peb lub tuam txhab tau xaiv ntau hom inks thiab viscosity, kho lub siab ntawm lub vijtsam luam ntawv, thiab lwm yam, thiab pib daws lub qhov thiab qhov tsis sib xws ntawm cov vias, thiab tau txais cov txheej txheem no rau pawg. ntau lawm.