Rau ntau yam laj thawj, muaj ntau yam sib txawv ntawm cov phiaj xwm pcb tsim tawm uas xav tau kev taw qhia tooj liab. Peb tau txais cov lus nug los ntawm cov neeg siv khoom uas tsis paub txog lub tswvyim ntawm tooj liab li lub sijhawm, yog li kab lus no los daws cov teeb meem no. Ib qho ntxiv, cov hauv qab no suav nrog cov kev cuam tshuam txog qhov kev cuam tshuam ntawm cov qhov hnyav tooj liab, thiab peb vam tias cov ntaub ntawv no yuav pab tau txawm tias cov neeg siv khoom uas twb paub txog cov tswvyim. Ib txoj kev nkag siab tob ntawm peb cov txheej txheem tuaj yeem pab kom koj mus npaj cov sijhawm tsim khoom thiab cov nqi tag nrho.
Koj tuaj yeem xav txog qhov hnyav ntawm tooj liab li cov tuab tuab lossis qhov siab ntawm tus tooj liab txheej ntawm cov ntaub ntawv gerber tsis xav txog. Chav ntsuas ntsuas yog ooj ib square foot (oz / ft2), qhov twg 1.0 ntawm tooj liab tau hloov mus rau ib tuab ntawm 140 mils (35 μm).
Mob tooj liab hnyav feem ntau yog siv rau cov khoom siv hluav taws xob hauv hluav taws xob lossis cov khoom siv uas yuav raug kev txom nyem los ntawm ib puag ncig hnyav. Thicker tseg tau tuaj yeem muab cov kav dej ntau dua, thiab muaj peev xwm pab tau ib txoj lw los nqa cov tam sim no tsis nce qhov ntev lossis dav ntawm qib tsis me. Nyob rau lwm qhov kawg ntawm kab zauv, qhov hnyav tooj liab yog qee zaum tau teev tseg kom ua tiav qhov kev txiav txim siab tshwj xeeb yam tsis muaj qhov tsawg kawg nkaus los yog dav. Yog li ntawd, thaum xam qhov lw dav, "tooj liab" yog ib daim teb uas yuav tsum tau ua.
Feem ntau siv tooj liab nqi hnyav tus nqi yog 1.0 ooj. Ua tiav, haum rau feem ntau cov haujlwm. Hauv tsab xov xwm no, nws yog hais txog plating thawj lub tooj liab qhov hnyav mus rau tus nqi siab dua thaum lub pcb tsim kev tsim khoom. Thaum paub tseeb qhov yuav tsum tau ceeb tooj liab hais txog rau peb pab pawg muag khoom, thov qhia qhov kawg (plated) tus nqi yuav tsum muaj nqi.
Tuab tooj liab pcbs tau txiav txim siab yog pcbs nrog sab nraud thiab puab tooj liab thicknesses xws li 3 oz / ft2 txog 10 oz / ft2. Lub tooj hluav taws xob hnyav ntawm lub zog tooj liab pcb uas tau tsim los ntawm 4 ooj ib square ko taw mus rau 20 ooj ib square foot. Qhov kev txhim kho tooj liab qhov hnyav, txuas nrog cov txheej txheej plating plating txheej ua kom haum rau hauv qhov, tuaj yeem tig lub chaw tswj hwm hluav taws xob tsis muaj zog thiab txhim khu kev qha. Cov neeg ua tooj loj tooj liab yuav zoo heev ntxiv rau cov tuab ntawm txhua tus PCB. Lub thickness ntawm tooj liab yuav tsum tau txiav txim siab ib txwm tau txiav txim siab nyob rau hauv Circuit Creal theem. Kev muaj peev xwm nqa tam sim no yog txiav txim siab los ntawm qhov dav thiab tuab ntawm cov tooj liab hnyav.
Cov tooj liab ntau dua yuav tsis tsuas yog nce tooj liab nws tus kheej, tab sis kuj yuav tsum muaj nqi ntxiv, thiab ua tau zoo rau cov nqi thiab khoom plig ntxiv. Ua ntej, cov kev ntsuas ntxiv uas yuav tsum tau ua, vim hais tias tus liab txheej tooj liab ntawm lub sij hawm etching thiab yuav tsum ua raws li DFM cov lus qhia. Lub tooj hluav taws xob hnyav ntawm cov Circuit Court board kuj cuam tshuam nws cov kev ua tau zoo rau hluav taws xob, ua rau cov board
Txawm hais tias tsis muaj tus qauv ntsuas ntawm cov tooj liab hnyav, nws feem ntau tau txais ntawm sab hauv thiab sab nraud ntawm cov ntawv luam tawm hluav taws xob, nws yog hu ua tooj liab PCB. Txhua lub voj voog nrog lub tooj liab tuab tshaj 4 ooj ib square foot (FT2) kuj tseem tau cais raws li cov tooj liab PCB. Huab tooj liab txhais tau tias 20 txog 200 ooj ib square foot.
Cov peev txheej tseem ceeb ntawm cov pob tw tooj liab hnyav yog lawv lub peev xwm tiv thaiv kom ntau dhau los, uas tuaj yeem rhuav tshem cov khoom siv hluav taws xob hauv ob peb feeb. Lub zog tooj loj loj dua muaj lub peev txheej muaj peev xwm ntau, uas ua rau nws tau tshaj nrog cov ntawv thov, xws li kev tiv thaiv kev lag luam thiab kev tiv thaiv kev lag luam thiab aerospace kev lag luam. Qee lwm yam zoo ntawm cov pob tw tooj liab hluav taws xob muaj xws li:
Vim muaj ntau tus ntsia tooj tooj liab tooj liab ntawm tib Circuit Coffic, cov khoom loj yog kev cog lus
Mob tooj liab hnyav los ntawm cov qhov dhau ntawm qhov siab tam sim no los ntawm PCB thiab pab hloov cua sov rau lub tshav kub sab nraud
Airborne muaj zog siab ntom plhaw planar transformer
Hnyav tooj liab luam hluav taws xob cov nkoj tuaj yeem siv rau ntau lub hom phiaj, thiab lwm yam hluav taws xob sib hloov, ua kom sov zog, ua tub rog, thiab kev tswj hwm kev lag luam tseem loj hlob ntxiv kom loj hlob. Mob tooj liab tau luam cov laug cam kuj tseem siv rau:
Kev pab fais fab
Kev Lag Luam Hluav Taws Xob
Cov Khoom Siv Vuam
Kev Lag Luam Tsheb
Hnub ci vaj huam sib luag tuam tsev, thiab lwm yam.
Raws li cov qauv tsim nyog yuav tsum tau ua, tus nqi ntau lawm ntawm tooj liab PCB hnyav dua li ntawm PCB zoo tib yam. Yog li ntawd, qhov ntau dua cov qauv tsim, cov nqi siab dua ntawm kev tsim cov khoom lag luam loj tooj liab pcbs.
