Tooj liab ntawv ci rau PCB

Vim muaj kev siv cov khoom siv hluav taws xob ntau ntxiv, qhov kev xav tau cov khoom siv no tau nce siab tas li hauv kev ua lag luam. Cov khoom siv no tam sim no nyob ib puag ncig peb vim peb vam khom lawv rau ntau lub hom phiaj sib txawv. Vim li no, kuv twv tias koj tau ntsib cov khoom siv hluav taws xob lossis feem ntau siv lawv hauv tsev. Yog tias koj siv cov khoom siv no, koj yuav xav tsis thoob tias cov khoom siv hluav taws xob tau txuas li cas, nws ua haujlwm li cas, thiab cov khoom siv tuaj yeem txuas nrog lwm yam khoom li cas. Cov khoom siv hluav taws xob uas peb siv hauv tsev yog ua los ntawm cov khoom siv uas tsis coj hluav taws xob. Lawv muaj txoj kev etched los ntawm cov khoom siv tooj liab conductive rau ntawm lawv qhov chaw, tso cai rau lub teeb liab ntws hauv lub khoom siv thaum nws ua haujlwm.

Yog li ntawd, cov thev naus laus zis ntawm PCB yog raws li kev nkag siab txog kev ua haujlwm ntawm cov khoom siv hluav taws xob. PCB ib txwm siv rau hauv cov khoom siv hluav taws xob tsim rau xov xwm. Txawm li cas los xij, nyob rau hauv tiam neeg niaj hnub no, lawv tau siv rau hauv txhua lub khoom siv hluav taws xob. Vim li no, tsis muaj khoom siv hluav taws xob tuaj yeem ua haujlwm yam tsis muaj PCB. Cov blog no tsom mus rau cov ntawv ci tooj liab rau PCB, thiab lub luag haujlwm ua si los ntawmntawv ci tooj liabnyob rau hauv kev lag luam circuit board.

Cov Tshuab Luam Ntawv Circuit Board (PCB)

Cov PCBs yog cov kev uas muaj hluav taws xob xws li cov kab thiab cov kab, uas tau laminated nrog ib daim ntawv ci tooj liab. Qhov no ua rau lawv txuas thiab txhawb nqa lwm yam khoom siv hluav taws xob txuas nrog lub cuab yeej. Vim li no, lub luag haujlwm tseem ceeb ntawm cov PCBs no hauv cov khoom siv hluav taws xob yog los muab kev txhawb nqa rau txoj kev. Feem ntau, cov ntaub ntawv xws li fiberglass thiab yas yooj yim tuav cov ntawv ci tooj liab hauv lub voj voog. Cov ntawv ci tooj liab hauv PCB feem ntau yog laminated nrog cov khoom tsis-conductive. Hauv PCB, cov ntawv ci tooj liab ua lub luag haujlwm tseem ceeb hauv kev tso cai rau kev ntws ntawm hluav taws xob ntawm ntau yam khoom ntawm lub cuab yeej, yog li txhawb nqa lawv cov kev sib txuas lus.

Cov tub rog yeej ib txwm txuas tau zoo ntawm PCB nto thiab cov khoom siv hluav taws xob. Cov solders no yog ua los ntawm kev siv hlau uas ua rau lawv yog cov nplaum muaj zog; yog li ntawd, lawv txhim khu kev qha hauv kev muab kev txhawb nqa rau cov khoom. Txoj kev PCB feem ntau yog composted nrog ntau txheej ntawm cov ntaub ntawv sib txawv xws li silkscreen thiab cov hlau laminated nrog lub substrate los ua lawv ua PCB.

Lub luag haujlwm ntawm cov ntawv ci tooj liab hauv kev lag luam circuit board

Cov thev naus laus zis tshiab niaj hnub no txhais tau tias tsis muaj lub cuab yeej hluav taws xob twg ua haujlwm tau yam tsis muaj PCB. Ntawm qhov tod tes, PCB vam khom tooj liab ntau dua li lwm yam khoom. Qhov no yog vim tooj liab pab tsim cov cim uas koom nrog txhua yam khoom hauv PCB kom tso cai rau kev ntws ntawm cov nqi hauv lub cuab yeej. Cov cim tuaj yeem piav qhia tias yog cov hlab ntsha hauv lub pob txha ntawm PCB. Yog li ntawd, PCB tsis tuaj yeem ua haujlwm thaum cov cim ploj lawm. Thaum PCB tsis ua haujlwm, lub cuab yeej hluav taws xob yuav poob nws lub tswv yim, ua rau nws tsis muaj txiaj ntsig. Yog li ntawd, tooj liab yog lub ntsiab lus tseem ceeb ntawm PCB. Cov ntawv ci tooj liab hauv PCB ua kom muaj kev ntws ntawm cov cim tsis muaj kev cuam tshuam.

Cov khoom siv tooj liab yeej ib txwm paub tias muaj kev coj ua siab dua li lwm cov khoom siv vim muaj cov hluav taws xob dawb nyob hauv nws lub plhaub. Cov hluav taws xob muaj kev ywj pheej txav mus los yam tsis muaj kev tiv thaiv rau ib qho atom ua rau tooj liab muaj peev xwm nqa cov nqi hluav taws xob txav mus los tau zoo yam tsis muaj kev poob lossis cuam tshuam rau cov teeb liab. Tooj liab, uas ua rau cov electrolyte tsis zoo tag nrho, yeej ib txwm siv rau hauv PCBs ua thawj txheej. Vim tias tooj liab tsis tshua cuam tshuam los ntawm cov pa oxygen saum npoo av, nws tuaj yeem siv los ntawm ntau hom substrates, insulating txheej, thiab hlau. Thaum siv nrog cov substrates no, nws tsim cov qauv sib txawv hauv lub voj voog, tshwj xeeb tshaj yog tom qab etching. Qhov no yeej ib txwm ua tau vim muaj peev xwm ntawm tooj liab los ua qhov sib txuas zoo meej nrog cov txheej insulating siv los ua PCB.

Feem ntau muaj rau txheej ntawm PCB uas tau tsim, uas plaub txheej yog nyob rau hauv PCB. Ob txheej ntxiv feem ntau yog ntxiv rau sab hauv vaj huam sib luag. Vim li no, ob txheej yog rau kev siv sab hauv, kuj tseem muaj ob rau kev siv sab nraud, thiab thaum kawg, ob txheej seem ntawm tag nrho rau txheej yog los txhim kho cov vaj huam sib luag hauv PCB.

Xaus lus

Cov ntawv ci tooj liabyog ib qho tseem ceeb ntawm PCB uas tso cai rau cov nqi hluav taws xob ntws yam tsis muaj kev cuam tshuam. Nws muaj kev coj ua hluav taws xob siab thiab ua rau muaj kev sib txuas zoo nrog cov khoom siv rwb thaiv tsev sib txawv siv hauv PCB circuit board. Vim li no, PCB vam khom cov ntawv ci tooj liab los ua haujlwm vim nws ua rau kev sib txuas ntawm PCB pob txha ua haujlwm tau zoo.