Tsim Qauv Rau Kev Tsim Khoom Hauv Cov PCBs Uas Muaj Zaus Ntau: Kev Sib Txuas Lus Tshiab Nrog Kev Muaj Tseeb Txog Kev Tsim Khoom

Kev Taw Qhia

Hauv kev tsim qauv ntawm cov PCBs zaus siab, tsim rau kev tsim khoom (DFM) yog tus choj tseem ceeb uas txuas kev tsim kho tshiab nrog kev tsim khoom siab, tsim khoom pheej yig. Rau cov kws tsim qauv RF PCB, kev paub txog cov ntsiab cai DFM txhais tau tias tsim cov laug cam uas tsis yog tsuas yog ua haujlwm tau zoo xwb tab sis kuj txhim khu kev qha, scalable, thiab economical consummable rau kev tsim khoom.

Los ntawm qhov chaw nrug mus rau kev sib sau ua ke, ntawm kev tsim qauv, thiab daim duab geometry ntawm lub ncoo, txhua yam me me yuav tsum xav txog qhov tseeb ntawm cov ntaub ntawv siv zaus siab thiab kev ua kom haum. Tsab xov xwm no piav qhia txog cov ntsiab lus tseem ceeb ntawm kev tsim PCB zaus siab uas tsim tau thiab nws cuam tshuam li cas rau qhov zoo, kev ua haujlwm zoo, thiab tus nqi.

1. Kev Tsim Qauv thiab Kev Sib Piv ntawm Kev Tsim Khoom

Qhov Dav Dav thiab Qhov Sib Nrug Zoo Tshaj Plaws

Hauv cov PCBs zaus siab, qhov dav thiab qhov sib nrug cuam tshuam rau ob qho tib si kev ua tau zoo ntawm hluav taws xob (piv txwv li, kev tswj hwm impedance) thiab cov txiaj ntsig ntawm kev tsim khoom.

• Lub hom phiaj impedance50Ω los yog 75Ω—yuav tsum tau qhov dav/qhov sib nrug uas tau xam los ntawm kev siv laminate Dk
• Kev txwv ntawm kev tsim khoomRau cov ntaub ntawv muaj zaus siab, kev hloov pauv ntawm cov txheej txheem muaj kev cuam tshuam ntau dua li tus qauv FR-4

Cov Lus Qhia Txog Kev Tsim QauvTsis txhob thawb qhov txwv qis dua ntawm kev kam rau etching. Hloov chaw 3mil/3mil, siv 4mil/4mil lossis loj dua ntawm cov laminates uas muaj zaus siab kom tiv thaiv kev luv luv, qhib, lossis kev puas tsuaj.

Kev Teeb Liab Zoo

Kev xa xov zoo rau cov teeb liab ceev ceev yuav tsum yog:

• Ncaj qha thiab luv luv (tso kom txo qhov teeb liab tsis zoo)
• Sib cais los ntawm qhov zaus domain (tiv thaiv kev sib tham)
• Yooj yim rau kev sim (nrog cov ntaub ntawv xeem uas siv tau)

Qhov no txhim kho kev ncaj ncees ntawm lub teeb liab, txhawb nqa kev kuaj xyuas kev tsim khoom, thiab tiv thaiv kev ua haujlwm tsis zoo thaum lub sijhawm xa tawm.

2. Cov Qauv Stackup: Kev Sib Npaug ntawm Cov Kev Xav Tau Hluav Taws Xob thiab Kev Tsim Khoom

Cov Txheej Txheem thiab Kev Xaiv Khoom Siv

• Ntau txheej ntxiv = kev sib cais lub teeb liab/hluav taws xob zoo dua, tab sis tus nqi thiab kev pheej hmoo siab dua
• Muaj tsawg txheej dhau lawm = Kev tswj hwm EMI tsis zoo, kev xa xov tsis zoo

Rau cov ntawv thov RF nyuaj xws li 5G, 10+ txheej yog ib txwm muaj. Rogers RO4350B yog ib qho kev xaiv nrov rau cov kev xav tau Dk/Df qis, tab sis nws xav tau kev tswj hwm nruj dua hauv kev ua tiav.

Lub Tswv Yim Txog Kev Tsim KhoXaiv cov laminates tsis yog rau kev ua tau zoo xwb tab sis kuj rau lawv cov kev ua tau zoo kev siv tshuab tau, kev coj cwj pwm sib txuas, thiab kev ruaj khov ntawm thermal thaum lub sijhawm lamination.

Cov Kev Xav Txog Txheej Txheem Lamination

Cov PCBs RF ntau txheej xav tau kev tswj hwm nruj rau:

• Kev sau npe raug (±50μm)
• Cov kev ntsuas nias: 180–220°C, 5–10MPa, 30–60 feeb nyob ntawm seb prepreg thiab tooj liab sib npaug li cas

Kev txhim kho stackup yuav tsum sib npaug kev faib tawm dielectric thiab tooj liab sib npaug kom ntseeg tau tias txawm tias lamination thiab zam kev warpage lossis delamination.

3. Tsim Los Ntawm Qhov Chaw Thiab Lub Rooj: Ua Raws Li Lub Peev Xwm Txheej Txheem

Hom Ntawm Qhov Thiab Qhov Loj Ntawm Qhov Tho

• Cov qhov hla yooj yim tshaj plaws los tsim tab sis qhia txog cov kab mob parasitics
• Vias dig muag thiab faus txo qhov teeb liab tsis sib xws tab sis ua rau tus nqi thiab qhov nyuaj nce ntxiv

Cov Lus Qhia Txog Kev Tsim QauvSiv cov hom ntawm cov xov tooj cua uas tsim nyog rau koj qhov bandwidth ntawm lub teeb liab thiab kev kam rau siab. Tsis txhob siv cov xov tooj cua uas me dua li 0.2 hli, vim tias lawv ua rau muaj teeb meem ntawm kev khawb thiab plating.

Tsim Qauv Rau Kev Txhim Kho Kev Sib Txuas Lus

• Xyuas kom tseeb tias cov ntaub pua plag sib phim qhov chaw ntawm cov khoom thiab rov ua dua qhov profile
• Rau kev rov ua dua tshiab: ua kom zoo dua qhov loj ntawm lub ncoo rau kev ntws sib npaug
• Rau cov wave solder: qhib cov kua dej solder nrog rau cov duab / qauv ntawm lub ncoo kom raug

Tsis txhob muaj teeb meem solderingXav txog ENIG lossis xaiv OSP rau cov ntawv thov zaus siab. Tsis txhob siv cov ntaub qhwv uas oxidized lossis plated tsis zoo uas tuaj yeem ua rau kev ua pob zeb rau ntawm lub ntxa, kev txuas, los yog cov pob qij txha txias.

4. Cov Kev Tsis Zoo thiab Kev Dais Teeb Meem Txog Kev Tsim Kho

Cov Kab Tsis Zoo

• Cov tsos mob: Qhov qhib qhov, luv luv, lossis qhov dav tsis sib xws
• Ua rau: Cov kab zoo dhau heev, kev tswj tsis zoo ntawm cov khoom siv txiav, kev khawb tsis sib xws
• Cov Kev Daws Teeb Meem:
• Siv cov khoom siv uas ruaj khov cov duab geometries uas yooj yim txiav
• Saib xyuas cov tshuaj lom neeg ntawm cov tshuaj etchant thiab kev npaj nto ntawm PCB
• Kho cov tshuab laum thiab tshuaj xyuas qhov hnav ntawm cov ntsis

Cov Teeb Meem Kev Sib Txuas Txheej

• Cov tsos mob: Kev rho tawm, ris tsho sab hauv
• Ua rau: Kev nias/kub tsis zoo lossis kev sib dhos tsis zoo
• Cov Kev Daws Teeb Meem:
• Xaiv cov tshuaj prepregs uas tiv taus dej noo
• Siv cov txheej txheem sib dhos ua ke siab precision
• Tsim nrog txaus kev sib cais ntawm cov txheej txheem

Qhov Tsis Zoo ntawm Via thiab Pad

• Cov tsos mob: Thaiv vias, plating tsis muaj zog, pad lifting lossis oxidation
• Ua rauCov khoom siv: cov khoom siv tsis zoo, cov khoom siv plating tsis zoo, cov ntaub ntawv tsis zoo
• Cov Kev Daws Teeb Meem:
• Txhim kho kev ntxuav tom qab drilling
• Tswj cov tshuaj lom neeg thiab cov yam ntxwv ntawm cov plating da dej
• Txhim kho cov qauv ntawm lub ncoo thiab siv kev ntim khoom tiv thaiv oxidation

Kaw Qhov Sib Txawv: Kev Tsim Khoom Uas Ua Tau Los Muab Tus Nqi

Cov tuam txhab uas muab tso rau hauv Cov ntsiab cai ntawm DFM rau hauv RF PCB tsim ua tau zoo dua lawv cov neeg sib tw:

• Cov nyiaj tau los thawj zaug siab dua
• Tsawg dua kev ua haujlwm dua lossis kev tsim qauv dua
• Kev ntseeg siab zoo dua mus sij hawm ntev
• Txo cov lus tsis txaus siab ntawm cov neeg siv khoom thiab cov nqi lav

Qhov sib txawv, kev tsis quav ntsej txog kev tsim khoom ua rau muaj kev ncua sijhawm ntau zaus, cov qoob loo qis dua, thiab cov khoom tsis ruaj khov - tshwj xeeb tshaj yog nyob rau hauv kev tsav dav hlau, kev kho mob, los yog cov khoom siv hluav taws xob tiv thaiv, qhov twg kev ua tsis tiav tsis yog ib qho kev xaiv.

Vim li cas Rich Full Joy yog koj tus khub zoo tagnrho RF PCB

Ntawm Kev Xyiv Fab Tag Nrho, peb mus dhau qhov kev tsim qauv - peb ua engineer rau kev vam meej ntawm kev tsim khoomPeb cov kws tshaj lij nkag siab txog lub neej tag nrho ntawm cov PCBs siab, los ntawm DFM cov kev coj ua zoo tshaj plaws mus rau kev ua cov khoom siv RF siab heev.

• Kev npaj qhov tseeb rau cov ntawv thov RF
• Kev sim ua ke thiab kev tsim qauv impedance
• Kev lees paub qhov tsim nrog kev sib phim ntawm cov txheej txheem tsim khoom
• Cov qauv tsim tau zoo los ntawm kev txhawb nqa los ntawm ntau xyoo ntawm kev paub txog RF tsim khoom

Ntseeg Nplua nuj Tag Nrho Kev Xyiv Fab los pab koj tsim qauv kev ua tau zoo uas tsav los ntawm, pheej yig, thiab ua tau zoo heev RF PCBs—tsim los ntawm lub tswv yim mus rau pem teb tsim khoom.