Dab tsi yog Qhov Zoo ntawm SMT Processing Technology?

SMT txheej txheem txheej txheem:

Ua ntej nyob rau saum npoo ntawm cov ntawv luam tawm Circuit Board solder txheej solder paste, dua nrogSMT tshuabCheebtsam ntawm metallized davhlau ya nyob twg los yog tus pin kom raug rau ntawm daim ntawv cog lus ntawm solder paste, ces muab lub PCB nrog cov khoom nyob rau hauv lubreflow qhov cubtag nrho rhuab rau melting solder paste, tom qab txias, solder paste, solder curing yog pom tau hais tias ntawm cov khoom thiab luam tawm Circuit Court ntawm txhua yam thiab hluav taws xob sib txuas.Dab tsi yog qhov zoo ntawm SMT ua tshuab?

I. Kev ntseeg siab thiab muaj zog vibration kuj

SMT kev ua haujlwm siv cov khoom siv nti, kev ntseeg siab, cov cuab yeej me me thiab lub teeb, yog li qhov kev vibration kuj muaj zog, siv cov khoom siv hluav taws xob, nrog kev ntseeg siab, feem ntau tsis zoo solder sib koom tus nqi tsawg dua li kaum txhiab, qis dua lub qhov ntsaws ntsaws tiv thaiv yoj. soldering thev naus laus zis ib qho kev txiav txim ntawm qhov loj, kom ntseeg tau tias cov khoom siv hluav taws xob lossis cov khoom siv hluav taws xob sib koom ua ke yog qhov tsawg, Tam sim no, yuav luag 90% ntawm cov khoom siv hluav taws xob txais SMT thev naus laus zis.

II.Cov khoom siv hluav taws xob yog qhov me me thiab siab hauv kev sib dhos ceev

Qhov ntim thiab qhov hnyav ntawm SMT cov khoom tsuas yog kwv yees li 1/10 ntawm cov tsoos plug-in Cheebtsam.Feem ntau, SMT tshuab tuaj yeem txo qhov ntim thiab qhov hnyav ntawm cov khoom siv hluav taws xob los ntawm 40% -60% thiab 60% -80%, feem.SMT SMT ua thiab sib dhos ua ke daim phiaj los ntawm 1.27mm mus rau tam sim no 0.63mm daim phiaj, qee qhov muaj txog li 0.5mm daim phiaj, los ntawm qhov kev teeb tsa thev naus laus zis los txhim kho cov khoom, tuaj yeem ua rau kev sib dhos ceev dua.

III.Cov yam ntxwv siab zaus, txhim khu kev qha

Vim yog cov khoom sib txuas ntawm cov khoom siv nti, cov cuab yeej feem ntau yog tsis muaj txhuas lossis luv luv, uas txo qhov cuam tshuam ntawm parasitic inductance thiab parasitic capacitance, txhim kho cov yam ntxwv ntawm lub voj voog, thiab txo cov electromagnetic thiab rf cuam tshuam.SMC thiab SMD tsim circuits muaj qhov siab tshaj plaws ntawm 3GHz, thaum cov khoom siv nti tsuas yog 500MHz, uas tuaj yeem ua rau lub sijhawm sib kis qeeb.Nws tuaj yeem siv rau hauv circuits nrog moos zaus tshaj 16MHz.Nrog MCM thev naus laus zis, qhov siab kawg moos zaus ntawm lub khoos phis tawj ua haujlwm tuaj yeem ncav cuag 100MHz, thiab kev siv hluav taws xob ntxiv los ntawm cov kab mob parasitic tuaj yeem raug txo los ntawm 2-3 zaug.

IV.Txhim kho productivity thiab paub tsis siv neeg ntau lawm

Yuav kom ua tiav tag nrho, perforated PCB mounting tam sim no yuav tsum tau nce 40% hauv thaj tsam ntawm thawj PCB kom lub taub hau sib dhos ntawm qhov tsis siv neeg plug-in tuaj yeem ntxig cov khoom, txwv tsis pub tsis muaj qhov chaw txaus los rhuav tshem.Tsis siv neeg SMT tshuab (SM421 / SM411) siv lub tshuab nqus tsev nqus nqus thiab cov khoom tawm, lub tshuab nqus tsev me me dua li qhov pom, tab sis txhim kho qhov ntom ntom.Qhov tseeb, cov khoom me me thiab qhov sib nrug zoo QFP yog tsim los ntawm lub tshuab SMT tsis siv neeg kom ua tiav tag nrho cov khoom siv tsis siv neeg.

V. Txo cov nqi thiab cov nuj nqis

1. Kev siv thaj tsam ntawm cov ntawv luam tawm yog txo, thiab thaj tsam yog 1/12 ntawm qhov kev siv tshuab los ntawm qhov.Yog tias CSP kev teeb tsa raug saws, thaj chaw yuav raug txo kom tsawg.

2. Tus naj npawb ntawm cov qhov drilling ntawm cov ntawv luam tawm raug txo kom txuag nqi kho.

3. Vim yog kev txhim kho ntawm cov yam ntxwv zaus, tus nqi ntawm Circuit Court debugging raug txo.

4. Vim yog qhov me me thiab lub teeb yuag ntawm cov khoom siv nti, cov khoom ntim, kev thauj mus los thiab kev khaws cia raug txo.

5. SMT SMT ua tshuab tuaj yeem txuag cov ntaub ntawv, lub zog, cov khoom siv, cov neeg ua haujlwm, lub sijhawm, thiab lwm yam, tuaj yeem txo cov nqi mus txog 30% -50%.