Copper foil rau PCB

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

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

The Printed Circuit Board (PCB) Technology

Cov PCBs yog txoj hauv kev uas muaj cov khoom siv hluav taws xob xws li cov kab thiab cov lem, uas yog laminated nrog ib daim ntawv tooj liab. Qhov no ua rau lawv txuas thiab txhawb nqa lwm yam khoom siv hluav taws xob txuas nrog mechanically rau lub cuab yeej. Vim li no, lub luag haujlwm tseem ceeb ntawm cov PCBs hauv cov khoom siv hluav taws xob yog muab kev txhawb nqa rau txoj hauv kev. Feem ntau, cov ntaub ntawv xws li fiberglass thiab plastics yooj yim tuav cov ntawv ci tooj liab hauv Circuit Court. Cov ntawv ci tooj liab hauv PCB feem ntau yog laminated nrog cov khoom siv tsis zoo. Hauv PCB, cov ntawv ci tooj liab ua lub luag haujlwm tseem ceeb hauv kev tso cai rau cov hluav taws xob ntws ntawm ntau yam khoom siv, 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 tsim los ntawm cov hlau uas ua rau lawv muaj zog adhesion; yog li ntawd, lawv muaj kev ntseeg siab hauv kev muab kev txhawb nqa mechanical rau cov khoom. Txoj kev PCB feem ntau yog composted nrog ntau txheej ntawm cov ntaub ntawv sib txawv xws li silkscreen thiab hlau laminated nrog substrate los ua lawv PCB.

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

Cov thev naus laus zis tshiab niaj hnub no txhais tau tias tsis muaj cov khoom siv hluav taws xob tuaj yeem ua haujlwm yam tsis muaj PCB. PCB, ntawm qhov tod tes, cia siab rau ntau dua ntawm tooj liab dua li lwm yam khoom. Qhov no yog vim tooj liab pab tsim cov kab uas koom nrog tag nrho cov khoom hauv PCB kom tso cai rau kev khiav ntawm tus nqi hauv lub cuab yeej. Cov kab mob tuaj yeem piav qhia raws li cov hlab ntsha hauv cov pob txha ntawm PCB. Yog li PCB tsis tuaj yeem ua haujlwm thaum cov kab ploj lawm. Thaum PCB tsis ua haujlwm, cov khoom siv hluav taws xob yuav poob nws lub tswv yim, ua rau nws tsis muaj txiaj ntsig. Yog li ntawd, tooj liab yog lub ntsiab conductivity ntawm PCB. Cov ntawv ci tooj liab nyob rau hauv PCB ua kom muaj kev cuam tshuam tas li ntawm cov teeb liab tsis muaj kev cuam tshuam.

Cov khoom siv tooj liab yeej ib txwm paub tias muaj qhov ua tau zoo dua li lwm cov ntaub ntawv vim yog cov khoom siv hluav taws xob dawb tam sim no hauv nws lub plhaub. Cov electrons muaj kev txav mus los yam tsis muaj kev tawm tsam rau ib qho atom ua tooj liab tuaj yeem nqa cov nqi hluav taws xob txav tau zoo yam tsis muaj kev poob lossis cuam tshuam hauv cov teeb liab. Cov tooj liab, uas ua rau lub cev tsis zoo electrolyte, yeej ib txwm siv hauv PCBs ua thawj txheej. Vim tias tooj liab tsis tshua muaj kev cuam tshuam los ntawm cov pa oxygen, nws tuaj yeem siv tau los ntawm ntau hom substrates, insulating txheej, thiab hlau. Thaum siv nrog cov substrates, nws tsim cov qauv sib txawv hauv Circuit Court, tshwj xeeb tshaj yog tom qab etching. Qhov no yog ib txwm ua tau vim muaj peev xwm ntawm tooj liab los ua qhov zoo tshaj plaws daim ntawv cog lus nrog cov txheej insulating siv los ua PCB.

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

Xaus

tooj liab ntawv ciyog ib qho tseem ceeb ntawm PCB uas tso cai rau kev khiav ntawm cov nqi hluav taws xob yam tsis muaj kev cuam tshuam. Nws muaj cov conductivity siab thiab zoo kawg nkaus ua ib daim ntawv cog lus muaj zog nrog cov ntaub ntawv sib txawv siv hauv PCB pawg thawj coj saib. Vim li no, PCB tso siab rau cov ntawv ci tooj liab ua haujlwm vim nws ua rau kev sib txuas ntawm PCB pob txha pob txha zoo.