Kev lag luam PCB tau siv sijhawm tseem ceeb ntawm cov khoom siv uas muab cov cim tsis tshua muaj peev xwm poob qis. Rau kev kub ceev thiab siab heev tsim, kev poob yuav txwv teeb liab kev tshaj tawm txog kev sib tw deb thiab cuam tshuam rau kev sib txawv uas tuaj yeem pom hauv kev ntsuas tdriation. Raws li peb tsim cov ntawv luam tawm hluav taws xob thiab txhim kho cov kev voj voog uas ua haujlwm ntawm cov nquag ua haujlwm ntau dua, nws yuav raug ntxias kom nrawm nrawm rau txhua cov qauv tsim koj tsim.

Thaum nws yog qhov tseeb uas tooj liab roughness tsim ntxiv impedance dispiation thiab poob, koj lub xov tooj zoo nkauj npaum li cas xav tau? Puas muaj qee txoj hauv kev yooj yim uas koj tuaj yeem siv los mus kov yeej tsis muaj xaiv ultra-du tooj liab rau txhua tus qauv? Peb yuav saib cov ntsiab lus no hauv tsab xov xwm no, nrog rau qhov koj tuaj yeem saib yog tias koj pib yuav khoom rau PCB cov ntaub ntawv cov ntaub ntawv.

Hom ntawmPcb Tooj Liab Nyiaj

Nquag thaum peb tham txog tooj liab ntawm pcb cov ntaub ntawv, peb tsis tham txog tus qauv tooj liab tshwj xeeb, peb tsuas yog tham txog nws cov xim ntxhib. Txawv Copper Cov Qauv Ntawv Tshaj Tawm tsim cov yeeb yaj kiab uas muaj cov qauv sib txawv, uas tuaj yeem ua kom pom tseeb hauv lub tshuab ntsuas hluav taws xob hauv hluav taws xob (sem) duab. Yog tias koj yuav tau ua haujlwm ntawm ntau zaus (feem ntau 5 GHz Wifi lossis siab dua) lossis ua tib zoo saib xyuas cov hom tooj liab tau teev tseg hauv koj cov ntaub ntawv datasheet.

Tsis tas li, nco ntsoov nkag siab lub ntsiab ntawm DK qhov tseem ceeb hauv cov ntaub ntawv. Saib qhov kev sib tham hauv Podcast nrog John Cooonrod los ntawm Rogers kom paub ntau ntxiv txog DK cov lus qhia. Nrog rau hauv lub siab, cia saib qee qhov sib txawv ntawm PCB tooj liab ntawv nyiaj.

Electrodeposited

Hauv cov txheej txheem no, lub nruas yog spun los ntawm kev daws teeb meem electrolytic, thiab cov tshuaj tiv thaiv hluav taws xob tau siv los "loj hlob" tooj liab ntawv "tus tooj liab ntawv rau lub nruas. Raws li lub nruas tig, lub txiaj ntsig tooj liab zaj duab xis yog maj mam qhwv mus rau cov menyuam yaus, muab ib daim ntawv tooj liab txuas ntxiv uas tuaj yeem dov mus rau lub laminate. Lub nruas sab ntawm tus tooj liab yuav tsum yeej phim cov reepness ntawm lub nruas, thaum lub sij hawm yuav muaj ntau rougher.

Electrodeposited PCB Tooj Liab Nyiaj

ElectrodiPosited Tooj Tooj Ntau Lawm.
Txhawm rau siv rau hauv cov txheej txheem pcb ntawm cov txheej txheem pcb ntawm lub tsev pheebsuab ntawm tus tooj liab yuav ua ntej yuav raug khi rau lub khob-dedin dielectric. Cov tooj liab uas tseem ceeb (nruas sab) yuav tsum muaj kev txhob txwm ntxhib thiab thiab cov mob ntshav rho tawm tus qauv Lamination. Qhov no yuav ua kom nws tuaj yeem sib raug zoo rau cov txheej tom ntej hauv PCB cov ntawv.

Deg-Kho Tshuaj Hluav Taws Xob

Kuv tsis paub lub sij hawm zoo tshaj plaws uas ua rau txhua hom sib txawv ntawm kev kho sab saum npooTooj liab ntawv nyiaj, yog li cov lus saum toj no. Cov ntaub ntawv tooj liab zoo yog qhov zoo tshaj plaws yog hais rov qab cov ntawv ci, txawm tias ob lwm yam kev hloov pauv (saib hauv qab).

Rov qab kho cov ntawv ci siv cov kev kho mob saum npoo av uas tau thov rau sab du (nruas sab) ntawm cov ntawv tooj hluav taws xob. Ib txheej kho mob yog tsuas yog txheej nyias uas txhob txwm ntxig tooj liab, yog li nws yuav muaj cov khoom nplaum ntau dua rau cov ntaub ntawv dikas. Cov kev kho no tseem ua raws li oxidation barrier uas tiv thaiv corrosion. Thaum cov tooj liab no siv los tsim cov laminate panels, sab nraud raug sib raug zoo mus rau dielectric, thiab sab laug sab tseem tshwm sim. Kev nthuav dav yuav tsis xav tau ib qho kev xav ntxiv ua ntej thiab lwm yam; Nws yuav tau muaj lub zog txaus los ua rau cov txheej tom ntej hauv PCB cov ntawv.

Peb txoj kev sib txawv ntawm kev kho tooj liab kho luam ntawv suav nrog:

Kev kub siab elongation (heme) Tooj liab ntawv ci: Qhov no yog ib qho hluav taws xob ntawv luam ntawv uas ua raws li IPC-4562 qib 3 specifications. Lub ntsej muag raug rau kuj tau kho nrog cov oxidation thaiv kom tiv thaiv kom tsis txhob xeb thaum cia.
Muab ob npaug rau kho ntawv ci: Hauv no Tooj Liab Ntawv Ntawv, kev kho yog thov rau ob sab ntawm zaj duab xis. Cov ntaub ntawv no yog qee zaum hu ua nruas-sab kho ntawv nyiaj.
Tooj liab: Qhov no tsis yog ib txwm tau ua raws li tooj liab. Qhov no tooj liab cov ntawv ci siv cov txheej xim me me ntawm cov matte ntawm tus tooj liab, uas yog tom qab ntawd roughened rau qib xav tau.
Cov ntaub ntawv kho cov txhab ua cov khoom lag luam zoo: Cov ntawv ci yog siv los ntawm cov ntoo tooj liab txheej txheem, thiab thaum kawg cov duab ua yeeb yaj kiab.

Pcb Tooj Liab Nyiaj

Cov txheej txheem kev kho deg kom zoo rau tooj liab cov ntawv ci. [Source: PYTEL, Steven G., li al. "Kev tsom xam ntawm kev kho tooj liab thiab cov teebmeem thaum hais txog teeb liab." Hauv cov 2008 58th Cheebtsam hluav taws xob thiab lub rooj sablaj Technology, PP. 1144-1149. IEEE, 2008.]
Nrog cov txheej txheem no, koj muaj cov khoom siv uas tuaj yeem siv tau yooj yim hauv cov txheej txheem fabrication txheej txheem nrog kev ua kom tsawg dua.

Tooj liab-annealed tooj liab

Rolled-Annaled tooj liab cov ntawv ci yuav dhau ib lub tooj liab ntawm tooj liab los ntawm ib khub tooj liab lub taub rau cov ntaub ntawv luam liab. Qhov roughness ntawm lub txiaj ntsig ntawm cov ntawv ci yuav sib txawv raws li cov dov tsis muaj zog (ceev, siab, thiab lwm yam).

Lub resulting daim ntawv tuaj yeem yog txoj kev du heev, thiab cov hlab muaj pom nyob rau saum npoo ntawm cov ntawv dov-annaled tooj liab daim ntawv. Cov duab hauv qab no qhia tau cov kev sib piv ntawm cov hluav taws xob luam ntawv ntawm tooj liab thiab yob-annaled ntawv ci.

Pcb Tooj Liab Ntawv Nyiaj Sib Piv

Kev sib piv ntawm cov khoom siv hluav taws xob hluav taws xob vs. dov-annaled ntawv ci.
Tsawg-profile tooj liab
Qhov no tsis tas yuav yog ib hom tooj liab ntawv ci koj yuav ua ntaub so nrog lwm txoj hauv kev. Tsawg-profile tooj liab yog electrodeposited tooj liab uas raug kho thiab hloov kho nrog micro-roughening cov txheej txheem los muab qhov nruab nrab micro roughness nrog kev ua kom muaj adhesion mus rau substrate. Cov txheej txheem rau kev tsim cov tshuab tooj liab yog ib txwm muaj npe. Cov ntawv ci no feem ntau yog categorized ua ultra-qes profile (ulp), tsawg heev profile (vlp), thiab tsuas yog tsawg-profile (LP, kwv yees li 1 micron qhov nruab nrab roughness).

Lwm Yam Khoom:

Vim li cas tooj liab ntawv ci siv hauv PCB raug?

Tooj liab ntawv ci siv hauv cov ntawv luam tawm Circuit Court