Optimize teeb liab zoo nyob rau hauv 12-txheej PCBs kom txo tau crosstalk

Kev daws teeb meem kev sib tw thiab kev sib tw sib tw hauv 12-txheej Circuit Court boards kom ua tiav qhov zoo tshaj plaws teeb pom kev zoo thiab txo qis Crosstalk

Qhia:

Kev nce qib sai sai hauv kev siv thev naus laus zis tau ua rau muaj kev xav tau ntawm cov khoom siv hluav taws xob ntau ntxiv, uas ua rau muaj kev siv ntau txheej hauv Circuit Court boards. Cov laug cam no muaj ntau txheej txheej ntawm cov kab hluav taws xob, muab kev sib cog lus thiab kev daws teeb meem zoo rau cov tshuab hluav taws xob. Txawm li cas los xij, raws li qhov nyuaj ntawm cov laug cam no nce, ntau yam teeb meem tshwm sim, xws li cov teeb meem ntawm kev sib txuas thiab interlayer. Hauv qhov blog no, peb yuav dhia mus rau hauv qhov nyuaj ntawm kev daws cov teeb meem no hauv 12-txheej Circuit Court boards kom ua tiav cov lus sib tw qis thiab cov teeb liab zoo. Yog li cia peb dhia dej!

Nkag siab txog cov kev sib tw cabling:

Kev siv cabling zoo yog qhov tseem ceeb los xyuas kom meej cov teeb liab sib kis tau zoo thiab txo qis kev cuam tshuam. Nyob rau hauv 12-txheej Circuit Court board, denser kab layout ua rau kom cov complexity ntawm txoj kev routing. Nov yog qee cov tswv yim tseem ceeb los ua kom tau raws li qhov kev sib tw no:

1. Muab cov khoom kom zoo:

Kev xav txog qhov kev tso kawm ua lub luag haujlwm tseem ceeb hauv kev ua kom zoo dua. Los ntawm kev npaj cov khoom sib xyaw ua ke, peb tuaj yeem txo qhov ntev ntawm tag nrho cov xaim thiab txo txoj hauv kev ntawm crosstalk. Tsom ntsoov rau txo qhov kev ncua deb ntawm cov khoom tseem ceeb kom ntseeg tau tias cov teeb liab ntws tau zoo.

2. Siv lub teeb liab txheej kom ntse:

Strategically muab cov teeb liab txheej pab tswj cov teeb liab kev ncaj ncees. Kev cuam tshuam tuaj yeem txo tau los ntawm kev sib koom ua ke cov cim zoo sib xws ua ke hauv cov khaubncaws sab nraud povtseg thiab muab qhov sib nrug txaus ntawm cov teeb liab rhiab heev. Tsis tas li ntawd, kev siv lub dav hlau hauv av thiab lub zog thoob plaws hauv lub rooj tsavxwm pab tswj kev cuam tshuam ntawm electromagnetic cuam tshuam (EMI) thiab txo qhov kev hloov pauv voltage.

3. Teeb liab txheej routing:

Routing signals ua tib zoo yog qhov tseem ceeb rau kev tiv thaiv kev sib tham. Siv cov khub sib txawv lossis tswj cov cim impedance rau cov teeb liab ntau zaus. Kev siv cov txheej txheem tiv thaiv, xws li kev sib txuas cov dav hlau hauv av nruab nrab ntawm cov teeb liab txheej, tuaj yeem muab cov txheej txheem ntxiv ntawm kev tiv thaiv kev sib txuas ntawm kev sib txuas thiab suab nrov ntau dhau.

4. Teeb liab kev ncaj ncees thiab tsim cov cai:

Ua raws li cov teeb meem kev ncaj ncees thiab tsim cov cai yog qhov tseem ceeb rau kev ua tiav cov teeb liab zoo. Ua ib tug meej impedance xam xam cov yam ntxwv ntawm lub substrate thiab tsim constraints. Xyuas kom raug txiav thiab impedance txuam kom tsis txhob muaj kev cuam tshuam cov teeb liab thiab cov ntaub ntawv tsis ncaj ncees.

daws qhov teeb meem ntawm inter-layer kev twb kev txuas:

Ntxiv nrog rau kev sib tw kev sib tw, kom ntseeg tau tias kev sib txuas ntawm interlayer zoo ib yam tseem ceeb rau kev ua kom zoo tshaj plaws. Cia peb tshawb txog qee cov tswv yim los daws qhov teeb meem kev sib txuas ntawm cov txheej txheem:

1. Ntawm qhov chaw:

Strategically positioned vias pab txhawb cov teeb liab khiav ntawm cov khaubncaws sab nraud povtseg. Muab cov vias ze rau lub teeb liab qhov chaw thiab qhov chaw yuav txo tau qhov kev sib tham sib tham thiab teeb liab degradation. Qhov muag tsis pom los yog faus vias txuas ntxiv txhim kho cov teeb liab kev ncaj ncees los ntawm kev tso cai rau kev sib txuas rau cov txheej txheem tshwj xeeb yam tsis tau nkag mus rau tag nrho pawg thawj coj saib.

2. Minimize ntawm stubs:

Via stubs tuaj yeem ua rau lub teeb liab attenuation, tshwj xeeb tshaj yog nyob rau hauv high zaus. Los ntawm kev txo qhov ntev ntawm cov stubs, peb tuaj yeem txo qhov kev xav thiab teeb liab poob. Ntau cov tswv yim xws li backdrilling thiab microdrilling tuaj yeem pab tshem tawm lossis txo qhov ntev ntawm cov stub.

3. Tswj impedance routing:

Ua kom muaj kev tswj hwm impedance ntawm ntau txheej txheej yog qhov tseem ceeb rau kev tswj cov teeb liab kev ncaj ncees. Kev ntsuas impedance nruj thiab ceev faj routing xyuas kom meej impedance yam ntxwv nyob rau hauv tag nrho cov interlayer kev twb kev txuas, txo cov teeb liab distortion.

4. Stacked tsim:

Ua tib zoo xav txog kev tsim cov txheej txheem tuaj yeem txo cov kev sib tw ntawm cov txheej txheem sib txuas. Xaiv ib lub symmetrical stackup siv ob txheej prepreg los yog symmetrically positioned dielectric txheej. Nrog rau kev sib npaug ntawm cov khoom sib npaug, txhua lub teeb liab dhau los ntawm txhua txheej yuav ntsib cov xwm txheej zoo sib xws, ua kom cov teeb liab zoo ib yam thoob plaws lub rooj tsavxwm.

Hauv kev xaus:

Kev loj hlob ntawm kev thov rau cov khoom siv hluav taws xob ua tau zoo yuav tsum tau siv cov txheej txheem ntau txheej thiab cov khoom siv hluav taws xob. Txawm li cas los xij, kev daws qhov teeb meem ntawm kev sib txuas thiab cov txheej txheem kev sib tw hauv cov rooj sib tham nyuaj no yog qhov tseem ceeb rau kev ua tiav qhov kev sib tw qis thiab cov teeb liab zoo. Los ntawm kev ua tib zoo tso cov khoom, kev txiav txim siab siv cov teeb liab txheej, ua kom muaj txiaj ntsig zoo, thiab txiav txim siab qhov kev sib txuas ntawm interlayer zoo, peb tuaj yeem kov yeej cov teeb meem no thiab ua kom pom kev ua tau zoo los ntawm 12-txheej Circuit Court boards. Siv cov tswv yim no coj koj cov khoom siv hluav taws xob tsim kom muaj kev vam meej tshiab!