Ntawm cov tooj liab hauv zos tuab yog ib yam nkaus thiab qhib qhov PCB kev tsim khoom lag luam tau ntsib ua ke, ib qho ntawm cov teeb meem tseem ceeb hauv yav dhau los txoj cai qhib qhov kev sib tham thiab cov lus tshawb fawb tau txwv nyob hauv PCB pawg thawj coj saib xyuas xaiv cov plank, daim ntawv rau CTE ntawm kev nthuav dav thermal coefficient loj dua, tom qab hauv kev sib dhos ntawm txias thiab kub poob ua rau lub qhov tawg tsis ua hauj lwm tshuaj xyuas, xws li tooj liab ua yam tsis tau los ntawm PCB nws tus kheej, Qhov tooj tooj liab electroplating los tshuaj xyuas thiab daws teeb meem. Daim ntawv no txheeb xyuas qhov ua rau tooj liab nyias hauv lub qhov los ntawm qhov pom ntawm PCB electroplating, thiab qhia peb yuav ua li cas kom tsis txhob muaj PCB tsis ua tiav los ntawm kev qhib Circuit Court vim tooj liab nyias hauv lub qhov los ntawm qhov pom ntawm electroplating.

Feem ntau hais lus, feem ntau ntawm lub qhov tooj liab tuab ntawm cov rooj sib tham ib txwm muaj nyob ntawm 0.8-1mil. Raws li rau qee qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntaws HDI zoo li HDI, vim tias lub qhov muag tsis pom kev tsis yooj yim rau xaim hluav taws xob thiab txhawm rau txhawm rau ua cov xaim nyias, qhov xav tau rau qhov tooj liab tuab yuav raug txo qis, yog li tseem muaj qhov tsawg kawg ua tiav qhov tooj liab tuab ntawm 0.4mil lossis ntau qhov tshwj xeeb. Txawm li cas los xij, muaj qee qhov xwm txheej tshwj xeeb, xws li cov rooj sib tham loj loj rau cov kab ke uas xav tau lub qhov tuab ntawm 0.8mil lossis siab dua vim tias muaj kev sib dhos tshwj xeeb thiab kev ntseeg tau xav tau rau kev siv ntev. Hauv IPC-6012, muaj qib meej ntawm tooj liab tuab nyob rau hauv lub ntsej muag ntawm lub qhov, yog li cas qhov tshwj xeeb qhov tooj tooj liab tshwj xeeb xav tau, raws li qhov xav tau ntawm cov khoom, thaum kawg tau teev tseg los ntawm cov neeg siv khoom.

PCB qhov tooj liab txheej txheem txheej txheem thiab ua tiav cov tuab tuab tuab

Cov hauv qab no yog daim ntawv qhia dav dav ntawm PCB yooj yim:

PCB qhov tooj liab txheej txheem txheej txheem thiab ua tiav cov tuab tuab tuab

PCB qhov tooj liab txheej txheem txheej txheem thiab ua tiav cov tuab tuab tuab

Peb tuaj yeem pom meej los ntawm ob daim duab, peb PCB tiav tooj liab tuab yog los ntawm PCB puag tooj liab tuab thiab tuab phaj hluav taws xob thiab hluav taws xob, thaum kawg, uas ua tiav tooj liab tuab yog ntau dua li tooj liab puag PCB, thiab peb txhua tus PCB qhov tooj liab tuab, tau ua tiav hauv ob txheej txheem ntawm electroplating, uas yog, tuab ntawm tag nrho phaj phaj plating tooj liab electroplating tooj liab tuab thiab duab.

Tooj tooj liab tuab ntawm PCB yog tsim los ntawm cov tooj liab tooj liab tuab ntawm PCB ntxiv rau qhov tuab tuab ntawm pawg thawj coj saib xyuas hluav taws xob thiab teeb duab hluav taws xob, uas yog hais, cov tooj liab ua tiav yog ntau dua li tooj liab tooj liab ntawm PCB. Cov tooj liab tuab ntawm txhua qhov ntawm peb PCB tau ua tiav los ntawm kev siv hluav taws xob hauv ob txoj hauv kev, uas yog, cov tooj liab tuab ntawm plated qhov ntawm tag nrho pawg thawj coj saib thiab cov tooj liab tuab ntawm cov duab hluav taws xob.

Cov khoom siv ua tiav 1OZ ua tiav tooj liab tuab, qhov tooj liab raws li IPC qib 2 tus qauv, feem ntau yog tooj liab (puv phaj plating) tuab ntawm 5-7um, ob tooj liab (plating duab) tuab ntawm 13-15um, yog li lub qhov tooj liab tuab ntawm 18 -22um, ntxiv rau etching thiab lwm yam laj thawj los ntawm kev poob, qhov kawg tooj liab yog txog 20UM.

Txuj ci rau tooj liab tuab hauv qhov (IPC-6012B, GJB 362A-96, QJ3103-99)

PCB qhov tooj liab txheej txheem txheej txheem thiab ua tiav cov tuab tuab tuab

Los ntawm qhov electroplating yog qhov txuas tseem ceeb heev hauv PCB txheej txheem kev tsim khoom. Txhawm rau kom paub qhov kev sib txuas hluav taws xob ntawm qib sib txawv ntawm cov hlau ua hlau, tooj liab nrog cov hluav taws xob zoo yuav tsum tau muab pov rau ntawm lub qhov phab ntsa ntawm lub qhov. Nrog kev sib tw hnyav zuj zus ntawm cov khoom lag luam dav dav, nws tau cog lus tias yuav tsum tau ua siab dua qhov xav tau ntawm kev ntseeg tau ntawm PCB cov khoom, thiab cov tuab ntawm dhau-qhov txheej txheej txheej txheej txheej tau dhau los ua ib qho ntawm cov khoom los ntsuas kev ntseeg tau ntawm PCB. Ib qho tseem ceeb cuam tshuam rau tooj liab tuab ntawm PCB qhov yog qhov sib sib zog nqus plating muaj peev xwm ntawm PCB plating.

Ib qho tseem ceeb ntsuas los ntsuas cov txiaj ntsig ntawm PCB plating los ntawm lub qhov yog qhov tsis sib xws ntawm tooj liab txheej tuab hauv lub qhov. Hauv kev lag luam PCB, lub peev txheej sib sib zog nqus tau piav qhia raws li qhov sib piv ntawm cov tooj liab txheej tuab ntawm qhov nruab nrab ntawm lub qhov rau txheej tooj liab txheej tuab ntawm lub qhov ncauj ntawm lub qhov.

Txhawm rau piav qhia qhov muaj peev xwm ntawm kev sib sib zog nqus plating, qhov tuab lub qhov tob sib piv, uas yog, cov tuab tuab piv, feem ntau siv.

PCB lub rooj tsavxwm tsis tuab heev tab sis lub qhov taub loj, qhov faib hluav taws xob muaj peev xwm hauv cov txheej txheem electroplating yog qhov sib xws, cov ion diffusion hauv lub qhov yog qhov zoo, cov tshuaj electroplating sib sib zog nqus plating tus nqi muaj peev xwm feem ntau loj; Ntawm qhov tsis sib xws, thaum qhov sib piv ntawm tuab rau txoj kab uas hla siab dua, lub qhov phab ntsa yuav qhia qhov tshwm sim ntawm “dev pob txha”, (qhov tshwm sim ntawm tuab tooj liab ntawm lub qhov ncauj thiab tooj liab nyias nyob hauv nruab nrab ntawm lub qhov), sib sib zog nqus plating muaj peev xwm da dej tsis zoo.

Lub peev xwm ua kom siab plating muaj qhov zoo hauv qab no:

1. Txhim kho kev ntseeg tau

Qhov tsis sib xws ntawm cov tuab ntawm cov txheej tooj liab tooj liab ntawm cov phab ntsa tau txhim kho, uas muab kev lees paub zoo dua rau qhov txias thiab kub cuam tshuam ntawm PCB hauv qhov tom ntej saum npoo thiab siv cov khoom lag luam dav dav, thiaj li zam kev ua tsis tiav hauv theem pib, ncua kev pabcuam lub neej ntawm cov khoom thiab txhim kho kev ntseeg siab ntawm cov khoom.

2. Txhim kho kev ua haujlwm tau zoo

Electroplating txheej txheem feem ntau yog “lub raj mis” txheej txheem hauv kev tsim khoom, txhim kho cov peev txheej sib sib zog nqus tuaj yeem ua rau lub sijhawm plating luv, txhim kho kev tsim khoom thiab ua haujlwm tau zoo.

3. Txo cov nqi tsim khoom

Cov chaw tsim khoom lag luam PCB feem ntau ntseeg tias yog tias lub peev txheej sib sib zog nqus tau nce 10%, cov khoom siv tuaj yeem txo qis tsawg kawg 10%. Qhov txiaj ntsig ncaj qha ntawm ib yam khoom no tsuas yog ib lab yuan/xyoo, tsis hais txog cov txiaj ntsig tsis ncaj qha tom qab txhim kho cov khoom lag luam zoo.