Ob chav sided pcb pawg thawj coj saib FR4 TG140 impedance tswj PCB

Circuit boards nrog tswj impedance muaj cov yam ntxwv hauv qab no:

1. nruj me ntsis tswj cov txheej txheem kev tsim khoom ntawm lub rooj tsav xwm hauv Circuit Court, nrog rau kev xaiv cov khoom siv, cov ntawv luam tawm, txheej txheej, thiab lwm yam, kom ntseeg tau tias lub impedance stability ntawm lub Circuit Court;

2. Siv cov cuab yeej tsim PCB tshwj xeeb los xyuas kom meej tias cov impedance ua tau raws li cov qauv tsim;

3. Nyob rau hauv tag nrho PCB layout thiab routing, siv txoj kev luv tshaj plaws thiab txo kev khoov kom ruaj khov ntawm impedance;

4. Txo qhov crossover ntawm kab teeb liab thiab kab hluav taws xob thiab kab hauv av, thiab txo qhov crosstalk thiab cuam tshuam ntawm cov teeb liab kab;

5. Siv cov cuab yeej impedance sib txuam ntawm cov kab hluav taws xob high-speed kis tau tus mob los xyuas kom meej lub purity thiab stability ntawm lub teeb liab;

6. Siv cov cuab yeej sib txuas sib txuas los txo cov suab nrov sib txuas thiab hluav taws xob hluav taws xob;

7. Raws li qhov sib txawv impedance yuav tsum, xaiv qhov tsim nyog txheej thickness, kab dav, kab sib nrug thiab dielectric tas li;

8. Siv cov cuab yeej ntsuas tshwj xeeb los ua qhov ntsuas impedance ntawm lub rooj tsav xwm Circuit Court kom ntseeg tau tias cov impedance tsis ua tau raws li cov qauv tsim.

Vim li cas thiaj li kev tswj hwm impedance tsuas yog 10% sib txawv?

Ntau tus phooj ywg yeej cia siab tias qhov impedance tuaj yeem tswj tau 5%, thiab kuv tau hnov ​​​​txog 2.5% impedance yuav tsum tau.Qhov tseeb, qhov kev tswj xyuas impedance yog 10% sib txawv, me ntsis nruj dua, tuaj yeem ua tiav 8%, muaj ntau yam:

1, qhov sib txawv ntawm cov khoom siv phaj nws tus kheej

2. Etching sib txawv thaum lub sij hawm ua PCB

3. Lub ion ntawm tus nqi ntws los ntawm lamination thaum ua PCB

4. Nyob rau hauv kev kub ceev, lub nto roughage ntawm tooj liab ntawv ci, PP iav fiber ntau nyhuv, thiab DF zaus variation nyhuv ntawm cov xov xwm yuav tsum to taub lub impedance.

Qhov twg yog Circuit Boards uas yuav tsum tau impedance feem ntau siv?

Circuit boards uas yuav tsum tau impedance feem ntau yog siv rau high-ceev teeb liab kis tau tus mob, xws li high-ceev digital teeb liab kis tau tus mob, xov tooj cua zaus teeb liab kis tau tus mob thiab millimeter yoj teeb liab kis tau tus mob.Qhov no yog vim qhov impedance ntawm Circuit Court board muaj feem xyuam rau kev sib kis ceev thiab ruaj khov ntawm lub teeb liab.Yog tias qhov kev tsim impedance tsis tsim nyog, nws yuav cuam tshuam rau kev sib kis tau zoo ntawm cov teeb liab thiab txawm ua rau lub teeb liab poob.Yog li ntawd, nyob rau hauv lub sij hawm uas yuav tsum tau high signal kis tau tus mob zoo, nws yog feem ntau yuav tsum tau siv Circuit Court boards nrog impedance yuav tsum tau.