Copper cladding yog dab tsi?

1.Copper cladding

Lub npe hu ua tooj liab txheej, yog qhov chaw tsis ua haujlwm ntawm lub rooj tsav xwm hauv Circuit Court raws li datum, thiab tom qab ntawd ntim nrog cov khoom tooj liab, cov chaw tooj liab no tseem hu ua tooj liab txhaws.

Qhov tseem ceeb ntawm cov txheej tooj liab yog: txo cov av impedance, txhim kho kev tiv thaiv kev cuam tshuam;Txo qhov voltage poob, txhim kho lub zog ua haujlwm;Txuas nrog hauv av xaim, nws tuaj yeem txo qhov chaw ntawm lub voj.

Tsis tas li ntawd rau lub hom phiaj ntawm kev ua PCB vuam raws li deformation raws li qhov ua tau, feem ntau PCB cov tuam txhab tseem yuav xav kom cov neeg tsim khoom siv PCB los sau qhov qhib ntawm PCB nrog tooj liab lossis kab sib chaws hauv av.Yog tias cov tooj liab tsis raug kho kom zoo, nws yuav ntau tshaj qhov poob.Puas yog tooj liab yog "zoo dua li qhov phem" lossis "qhov phem tshaj qhov zoo"?Raws li peb txhua tus paub, nyob rau hauv cov ntaub ntawv ntawm high zaus, qhov kev faib capacitance ntawm cov xaim ntawm cov ntawv luam tawm Circuit Board yuav ua haujlwm.Thaum qhov ntev ntau dua 1/20 ntawm lub wavelength sib haum mus rau lub suab nrov zaus, cov nyhuv kav hlau txais xov yuav raug tsim tawm, thiab lub suab nrov yuav tawm sab nraud los ntawm kev xaim.Yog tias muaj cov txheej txheem tooj liab tsis zoo hauv PCB, cov txheej tooj liab yuav dhau los ua ib qho cuab yeej los tawm suab nrov.drthfg (1)

Yog li ntawd, nyob rau hauv lub high zaus Circuit Court, tsis txhob xav hais tias hauv av nyob rau hauv ib qho chaw, qhov no yog "hauv av xaim", yuav tsum tsawg tshaj li λ / 20 qhov sib nrug, nyob rau hauv cov xaim los ntawm lub qhov, thiab lub dav hlau hauv av ntawm multilayer "zoo grounding. ”.Yog tias cov txheej tooj liab raug kho kom zoo, cov txheej tooj liab tsis yog tsuas yog ua rau lub zog tam sim no xwb, tab sis kuj tseem ua lub luag haujlwm ntawm kev tiv thaiv kev cuam tshuam.Yog li ntawd, nyob rau hauv lub high zaus Circuit Court, tsis txhob xav hais tias hauv av nyob rau hauv ib qho chaw, qhov no yog "hauv av xaim", yuav tsum tsawg tshaj li λ / 20 qhov sib nrug, nyob rau hauv cov xaim los ntawm lub qhov, thiab lub dav hlau hauv av ntawm multilayer "zoo grounding. ”.Yog tias cov txheej tooj liab raug kho kom zoo, cov txheej tooj liab tsis yog tsuas yog ua rau lub zog tam sim no xwb, tab sis kuj tseem ua lub luag haujlwm ntawm kev tiv thaiv kev cuam tshuam.

2.Ob hom ntawm tooj liab txheej

Feem ntau muaj ob txoj hauv kev los npog tooj liab, uas yog, thaj tsam loj ntawm tooj liab thiab daim phiaj tooj liab, feem ntau nug tias thaj tsam loj ntawm tooj liab lossis kab sib chaws tooj liab yog qhov zoo, tsis zoo rau generalize.

Vim li cas?Loj thaj tsam ntawm cov txheej tooj liab, nrog rau kev nce tam sim no thiab tiv thaiv ob lub luag haujlwm, tab sis thaj tsam loj ntawm cov txheej tooj liab, yog tias cov yoj soldering, lub rooj tsavxwm yuav qaij, lossis txawm tias npuas.Yog li ntawd, ib cheeb tsam loj ntawm tooj liab raug them, thiab ob peb lub qhov feem ntau qhib kom txo tau tooj liab foil foaming.

Daim phiaj yooj yim them nrog tooj liab yog feem ntau tiv thaiv cov nyhuv, lub luag hauj lwm ntawm kev nce tam sim no yog txo, los ntawm qhov pom ntawm cov cua sov dissipation, daim phiaj muaj qhov zoo (nws txo cov cua sov ntawm tooj liab) thiab plays lub luag hauj lwm ntawm electromagnetic shielding.Tshwj xeeb tshaj yog rau qhov kov Circuit Court, raws li qhia nyob rau hauv daim duab hauv qab no: Nws yog ib qho tsim nyog los taw qhia tias daim phiaj yog tsim los ntawm staggered kab.Peb paub tias rau lub voj voog, qhov dav ntawm cov kab muaj nws qhov sib txuas "hluav taws xob ntev" rau qhov ua haujlwm zaus ntawm lub rooj tsavxwm Circuit Court (qhov loj me tuaj yeem muab faib los ntawm cov zaus digital sib raug rau qhov ua haujlwm zaus, saib cov phau ntawv tseem ceeb kom paub meej) .

Thaum qhov kev khiav hauj lwm zaus tsis siab heev, tej zaum cov kab hluav taws xob tsis muaj txiaj ntsig zoo, thiab thaum lub sijhawm hluav taws xob sib tw nrog kev khiav hauj lwm zaus, nws yog qhov phem heev, thiab koj pom tias lub voj voog ua haujlwm tsis zoo, thiab muaj cov teeb liab nyob txhua qhov chaw. uas cuam tshuam rau qhov system.

drthfg (2)

Lub tswv yim yog xaiv raws li tus qauv tsim ntawm lub rooj tsav xwm hauv Circuit Court, tsis txhob tuav ib yam dab tsi.Yog li ntawd, high zaus Circuit Court tiv thaiv kev cuam tshuam yuav tsum tau ntawm ntau lub hom phiaj daim phiaj, tsis tshua muaj zaus Circuit Court nrog loj tam sim no Circuit Court thiab lwm yam uas feem ntau siv ua tiav tooj liab paving.