Pawiri mbali pcb bolodi chitsanzo FR4 TG140 impedance ankalamulira PCB

Ma board ozungulira okhala ndi impedance yoyendetsedwa ali ndi izi:

1. Yang'anirani mosamalitsa njira yopangira bolodi loyang'anira dera, kuphatikiza kusankha zinthu, ma wiring osindikizidwa, malo osanjikiza, ndi zina zambiri, kuwonetsetsa kukhazikika kwa dera;

2. Gwiritsani ntchito zida zapadera za PCB kuti muwonetsetse kuti cholepheretsacho chikukwaniritsa zofunikira za mapangidwe;

3. Pamakonzedwe onse a PCB ndi njira, gwiritsani ntchito njira yaifupi kwambiri ndikuchepetsa kupindika kuti muwonetsetse kukhazikika kwa impedance;

4. Chepetsani kuwoloka pakati pa mzere wa chizindikiro ndi mzere wa mphamvu ndi mzere wapansi, ndi kuchepetsa kusokoneza ndi kusokoneza mzere wa chizindikiro;

5. Gwiritsani ntchito teknoloji yofananira ya impedance pamzere wothamanga kwambiri wothamanga kuti muwonetsetse chiyero ndi kukhazikika kwa chizindikiro;

6. Gwiritsani ntchito ukadaulo wolumikizira ma interlayer kuti muchepetse phokoso lolumikizana ndi ma radiation a electromagnetic;

7. Malinga ndi zofunikira zosiyanasiyana za impedance, sankhani makulidwe oyenerera osanjikiza, m'lifupi mwake, mizere yotalikirana ndi dielectric;

8. Gwiritsani ntchito chida choyesera kuti muyese kuyesa kwa impedance pa bolodi la dera kuti muwonetsetse kuti magawo a impedance amakwaniritsa zofunikira za mapangidwe.

Chifukwa chiyani kuwongolera kokhazikika kwa impedance kumatha kukhala kupatuka kwa 10%?

Anzanga ambiri akuyembekeza kuti cholepheretsacho chikhoza kuwongoleredwa mpaka 5%, ndipo ndamvapo za 2.5% yofunikira.M'malo mwake, chizoloŵezi chowongolera cholepheretsa ndi 10% kupatuka, kukhwima pang'ono, kumatha kukwaniritsa 8%, pali zifukwa zambiri:

1, kupatukana kwa mbale chuma palokha

2. Etching kupatuka pa PCB processing

3. The iation wa otaya mlingo chifukwa lamination pa PCB processing

4. Pa liwiro lalitali, roughage pamwamba pa zojambula zamkuwa, PP glass fiber effect, ndi DF frequency kusiyanasiyana zotsatira za TV ayenera kumvetsa impedance.

Kodi ma board board okhala ndi zofunikira za impedance amagwiritsidwa ntchito pati?

Ma board ozungulira okhala ndi zofunikira za impedance nthawi zambiri amagwiritsidwa ntchito potumiza ma siginecha othamanga kwambiri, monga kutumizira ma siginecha othamanga kwambiri, kutumizira ma frequency a wailesi ndi ma millimeter wave wave.Izi ndichifukwa choti kutsekeka kwa bolodi lozungulira kumagwirizana ndi liwiro lotumizira komanso kukhazikika kwa chizindikirocho.Ngati mawonekedwe a impedance ndi osamveka, amakhudza kufalikira kwa chizindikirocho komanso ngakhale kutayika kwa chizindikiro.Chifukwa chake, munthawi zomwe zimafunikira mawonekedwe apamwamba otumizira ma siginecha, nthawi zambiri pamafunika kugwiritsa ntchito ma board ozungulira okhala ndi zofunikira za impedance.