Multilayer PCBs, raws li tus neeg nqa khoom tseem ceeb rau miniaturization thiab kev ua haujlwm siab ntawm cov khoom siv hluav taws xob, muaj cov qauv nyuaj thiab ntau cov txheej txheem tsim khoom. Thaum lub sij hawm tsim khoom, sib dhos, thiab siv, cov teeb meem tshwm sim xws li qhib circuits, luv luv Circuit Court, thiab lub rooj tsavxwm detonation yog nquag tshwm sim, cuam tshuam ncaj qha rau cov khoom ruaj khov thiab lifespan. Hauv qab no, peb yuav hais txog peb qhov siab - teeb meem zaus, rhuav tshem lawv cov laj thawj thiab muab cov kev daws teeb meem raws li qhov tiag - ntiaj teb daim ntawv thov scenarios. Cov kev daws teeb meem no yuav tsum tsis muaj qhov tsis yooj yim, tsom mus rau kev ua tau zoo los pab kom tsis txhob muaj kev pheej hmoo cuam tshuam.
Multilayer PCB Qhib Circuit Court teeb meem: Ua thiab daws
Qhib circuits yog ib qho kev ua txhaum ntau tshaj plaws nyob rau hauv multilayer PCBs, manifesting li cov kab tawg thiab tsis muaj peev xwm xa cov teeb liab ib txwm. Lawv feem ntau tshwm sim ntawm kev sib txuas ntawm interlayer thiab ntawm qhov sib txuas ntawm cov ntaub qhwv thiab cov kab, tsis tsuas yog cuam tshuam rau kev ua haujlwm ntawm cov khoom siv ib txwm muaj tab sis kuj tseem tuaj yeem ua rau cov khoom tseem ceeb. Cov laj thawj yog tsom rau hauv peb theem: kev tsim khoom, sib dhos, thiab siv. Cov kev daws teeb meem yog raws li nram no:
Cov laj thawj tseem ceeb:Hauv cov txheej txheem tsim khoom, cov txheej txheem lamination tsis raug, kev sib tsoo tsis zoo, thiab kev sib tsoo ntau dhau tuaj yeem ua rau tawg interlayer vias thiab cov kab sib txuas. Thaum lub sij hawm sib sau ua ke, qhov kub thiab txias ntau dhau, cov khoom siv tsis txaus, lossis cov quab yuam sab nraud kov lub voj voog thaum lub sij hawm soldering tuaj yeem ua rau cov ntaub qhwv detachment thiab ib feem ntawm lub voj voog. Thaum siv, ntev - cov khoom siv vibration thiab cov av noo ntau dhau tuaj yeem ua rau lub voj voog oxidation thiab kev laus, thaum kawg ua rau qhib circuits.
Cov kev daws teeb meem:
1. Manufacturing Stage Control: Optimize cov txheej txheem lamination kom nruj interlayer bonding thiab zam kev puas tsuaj rau vias vim tsis sib npaug siab thiab kub hloov; nruj me ntsis tswj qhov tseeb drilling kom tsis txhob drilling misalignment los ntawm kev puas tsuaj rau Circuit Court; tswj lub sij hawm etching thiab etching kua concentration los tiv thaiv tshaj -etching ntawm Circuit Court.
2. Cov Txheej Txheem Txheej Txheem Txheej Txheem: Ua qauv kev ua haujlwm ntawm kev sib tsoo, tswj qhov kub thiab lub sijhawm kom tsis txhob muaj qhov kub siab - kub kub rau hauv Circuit Court thiab cov ntaub qhwv; xyuas kom muaj peev xwm solder kom txaus los lav tag nrho kev sib cuag ntawm cov ntaub qhwv thiab cov khoom siv hluav taws xob / cov khoom siv; zam kev quab yuam sab nraud nrog circuits thaum soldering los tiv thaiv khawb los yog tawg.
3. Kev Siv thiab Kev Tiv Thaiv Kev Tiv Thaiv: Tsis txhob cuam tshuam cov cuab yeej siv rau qhov chaw muaj kev vibration hnyav; qhov no tuaj yeem txo tau los ntawm kev ntxiv cov khoom tsis sib xws los txo qhov cuam tshuam ntawm kev co ntawm PCB; tswj ambient humidity los tiv thaiv oxidation ntawm circuits vim ya raws; niaj hnub tshuaj xyuas PCB circuits, tam sim ntawd ntxuav cov plua plav thiab cov khib nyiab, thiab hais txog cov cim oxidation tam sim ntawd.
Cov teeb meem luv luv hauv Multilayer PCBs:Ua rau thiab kev daws teeb meem luv luv Circuit Court yog qhov ua txhaum loj hauv multilayer PCBs, tshwm sim raws li kev npaj txhij txog txuas ntxiv ntawm cov kab hluav taws xob uas nyob ib sab lossis nruab nrab ntawm cov txheej txheem. Qhov no tuaj yeem hlawv cov khoom ncaj qha, ua rau cov khoom siv tsis raug, thiab thaum muaj xwm txheej hnyav, ua rau muaj kev nyab xeeb. Cov laj thawj feem ntau cuam tshuam nrog kev sib kis, kev tsim khoom tsis xws luag, thiab kev sib dhos yuam kev. Cov kev daws teeb meem tsom mus rau "tiv thaiv kev kis kab mob, tswj kev ua kom zoo, thiab kev ua haujlwm zoo."
Ua rau Core
Thaum lub sij hawm tsim cov txheej txheem, tsis txaus sib nrug ntawm cov kab, tsis tiav etching tawm hauv cov seem seem, los yog impurities seem thaum lub sij hawm lamination tuaj yeem ua rau luv luv Circuit Court ntawm txheej thiab kab. Thaum lub sij hawm sib dhos, solder overflow, solder residue, los yog misaligned los yog overlapping tivthaiv yuav ua rau continuation ntawm cov kab uas nyob ib sab. Thaum siv, plua plav thiab roj sib sau ua ke ntawm PCB nto, lossis qhov chaw ntub dej ua rau muaj kev laus thiab kev puas tsuaj rau txheej txheej rwb thaiv tsev, tuaj yeem ua rau luv luv Circuit Court.
Kev daws teeb meem
1. Kev tsim cov txheej txheem ua kom zoo: Tsim ib qho kev tsim hluav taws xob tsim nyog los xyuas kom meej tias qhov sib txawv ntawm cov kab uas nyob ib sab ua tau raws li cov lus qhia tshwj xeeb thiab tsis txhob muaj qhov sib txawv tsis txaus ua rau txuas ntxiv mus; optimize cov txheej txheem etching kom paub meej etching thiab tshem tawm cov residual solder residue thiab impurities; Ua tib zoo ntxuav lub substrate ua ntej lamination los tiv thaiv impurities los ntawm kev cuam tshuam kev ua haujlwm rwb thaiv tsev.
2. Kev Tswj Txheej Txheem Kev Tswjhwm: Standardize soldering kev khiav hauj lwm, tswj tus nqi ntawm solder kom tsis txhob solder overflow thiab overlap ntawm cov kab uas nyob ib sab; huv si solder residue tam sim tom qab soldering los tiv thaiv luv luv Circuit Court tshwm sim los ntawm solder residue; txheeb xyuas txoj haujlwm ntawm cov khoom ua rau lub sijhawm sib dhos kom tsis txhob muaj kev sib tsoo lossis sib tshooj ua rau muaj kev txuas ntxiv.
3. Kev Siv thiab Kev Tu Kev Tu: Ntxuav lub PCB tsis tu ncua kom tshem tawm cov plua plav, roj, thiab lwm yam kab mob kom tsis txhob muaj kev sib kis luv luv los ntawm cov khoom paug; zam lub sijhawm ntev ntawm PCB kom ntub thiab siab - qhov kub thiab txias ib puag ncig tiv thaiv kev laus thiab kev puas tsuaj rau txheej rwb thaiv tsev; rau cov cheeb tsam uas nquag mus rau luv luv Circuit Court, nruab insulating lub tes tsho tiv thaiv los yog coatings.
Multilayer PCB Delamination Teeb meem:
Ua rau thiab daws Delamination, los yog tawg ntawm PCB substrate, feem ntau tshwm sim ntawm lamination interfaces los yog ib ncig ntawm vias. Nws manifests raws li bulging thiab delamination ntawm lub substrate nto, thiab nyob rau hauv loj heev mob, yuav ua tau rau Circuit Court breakage. Nws feem ntau cuam tshuam nrog kev hloov pauv kub, txheej txheem tsis xws luag, thiab kev cuam tshuam sab nraud. Cov kev daws teeb meem tsom rau "kev tswj qhov kub thiab txias, kev sib raug zoo, thiab kev tiv thaiv kev cuam tshuam."
Cov Uas Tseem Ceeb Thaum lub sij hawm tsim cov txheej txheem, tsis raug lamination kub thiab kev tswj siab ua rau xoob interlayer bonding, ua rau huab cua npuas lossis voids; Kev xaiv cov khoom siv substrate tsis tsim nyog nrog cov cua sov tsis txaus; thiab tsis ua kom sai tshem tawm burrs tom qab drilling, ua rau muaj kev ntxhov siab. Thaum lub sij hawm sib dhos los yog siv, qhov kub thiab txias ntau dhau thiab qhov kub thiab txias hloov tuaj yeem ua rau tsis zoo thermal expansion thiab contraction ntawm cov txheej txheej substrate, ua rau muaj kev ntxhov siab sab hauv. Cov kev cuam tshuam sab nraud thiab kev ntxhov siab tuaj yeem ua rau lub substrate tawg thiab delamination.
Kev daws teeb meem
1. Manufacturing txheej txheem tswj: optimize lub lamination txheej txheem, precisely tswj lamination kub, siab, thiab lub sij hawm los xyuas kom meej kev sib raug zoo ntawm cov khaubncaws sab nraud povtseg, tsis muaj cua npuas thiab voids; xaiv cov ntaub ntawv substrate nrog cov cua sov tsim nyog raws li daim ntawv thov scenario kom tsis txhob tawg ntawm lub rooj tsavxwm vim cov khoom siv tsis txaus thaum tshav kub kub; Tam sim ntawd ntxuav burrs tom qab drilling kom txo tau kev ntxhov siab concentration.
2. Kev sib dhos txheej txheem txheej txheem: nruj me ntsis tswj qhov kub thiab txias thiab lub sijhawm kom tsis txhob cuam tshuam PCB ntev mus rau qhov kub thiab txias thiab txo cov thermal stress; zam qhov kub thiab txias hloov thaum lub sij hawm soldering, thiab txais yuav ib tug maj mam cua sov thiab qeeb txias txoj kev los txo cov kev ntxhov siab nyob rau hauv lub tsim.
3. Kev siv thiab kev tiv thaiv kev ntsuas: zam kev cuam tshuam sab nraud thiab kev kub ntxhov ntawm PCB; coj kev tiv thaiv thaum lub sij hawm thauj mus los thiab kev teeb tsa, thiab nruab cushioning thiab kho cov cuab yeej; tswj lub ambient kub ntawm cov cuab yeej kom tsis txhob ntev raug rau siab -kub thiab nquag alternating kub thiab txias ib puag ncig, txo kev puas tsuaj los ntawm thermal expansion thiab contraction ntawm lub substrate.
Qhib Circuit Court, luv Circuit Court, thiab board tawg teeb meem nyob rau hauv multilayer PCBs yog qhov tseem ceeb muaj feem xyuam rau tsis yog - txheej txheem tsim, kev ua haujlwm tsis raug, thiab kev siv tsis zoo. Lub hauv paus ntawm kev tiv thaiv yog nyob rau hauv "kev tiv thaiv ua ntej qhov kev tshwm sim, kev tswj thaum lub sij hawm qhov kev tshwm sim, thiab raws sij hawm tuav tom qab qhov kev tshwm sim": nruj me ntsis tswj cov txheej txheem cov ntsiab lus thaum lub sij hawm tsim khoom los txo qhov tsis xws luag; standardize kev khiav hauj lwm thaum lub sij hawm sib dhos kom tsis txhob muaj tib neeg yuam kev; thiab xyuas kom muaj kev tiv thaiv zoo thiab kev tshuaj xyuas thiab kev saib xyuas tsis tu ncua thaum siv.
Los ntawm cov kev daws teeb meem no, qhov tshwm sim ntawm cov teeb meem ntau txheej PCB tuaj yeem txo qis, txhim kho cov khoom ruaj khov thiab kev ua neej. Hauv kev siv tswv yim, kev tiv thaiv kev ntsuas yuav tsum tau hloov kho raws li kev siv tshwj xeeb, ntsuas kev ua tau zoo thiab kev lag luam kom ntseeg tau tias cov txheej txheem PCBs tau ua tiav lawv cov haujlwm tseem ceeb.