Chii chinonzi loop

Mhete yemhete ishoko rehunyanzvi renzvimbo iri pakati pegomba rakaboorwa muburi nekumucheto kwepadhi yekuitisa. Iwo maburi-maburi anoita semanodhi ekubatanidza pakati pezvikamu zvakasiyana pa PCB.

Kuti unzwisise izvo zvekutanga zveannular zvindori, iwe unofanirwa kuziva maitiro ekugadzira kuburikidza-maburi. Mukugadzira PCB, iyo PCB inomisikidzwa uye inobviswa nemapadhi anoenderana nemumwe pazvikamu zvakasiyana. Dhonza maburi kuti uite gomba uye isa mhangura pamadziro ne electroplating.

Paunoona PCB kubva kumusoro, iyo yakaboorwa nemumakomba inoratidza denderedzwa pateni. Dzinonzi zvindori. Kukura kwemhete kwakasiyana. Vamwe vagadziri vePCB vakasarudza kushandisa zvishwe zvakakora, nepo vamwe vakapa zvishwe zvitete nekuda kwekunetsa kwenzvimbo.

Saizi yemhete inoverengerwa neformula inotevera.

Saizi yemhete = (dhayamita yendiro yekudzosera – dhayamita yedhill bit) / 2

Semuenzaniso, kuchera gomba re 10 mil mu 25 mil pad kunoburitsa 7.5 mil ring.

Matambudziko akajairika ane zvishwe

Sezvo maburi-maburi ari chikamu chakakosha chekugadzira PCB, zvinowanzo fungidzirwa kuti zvishwe hazvina kukanganisa. Iyi ipfungwa isiriyo. Kana pane dambudziko ne loop, inogona kukanganisa kuenderera kwekutsvaga.

Theoretically, mhete yakakwana inoumbwa nekuboora gomba pakati peburi-padhi. Mukuita, iko kuchera kunoenderana nemuchina unoshandiswa nemugadziri wePCB. Vagadziri vePCB vane kushivirira chaiko kune mhete, kazhinji anenge 5 mils. Mune mamwe mazwi, chibhorani chinogona kutsauka kubva pachiratidzo mukati mechikamu chakapihwa.

Kana bhiti racho risina kuenderana nechiratidzo, gomba rinoguma richatarisana nedivi repadhi. Annular tangents inoonekwa kana chikamu chegomba chinobata kumucheto kwepadhi. Kana chibhorani chikaramba chatsauka, kubuda mvura kunogona kuitika. Leakage inguva apo chikamu chegomba chinodarika nzvimbo yakazadzwa.

Annular fracture inogona kukanganisa kuenderera kweburi-buri. Kana nzvimbo yemhangura yegomba rekubatanidza uye padhi idiki, ikozvino ichabatwa. Dambudziko iri rinowedzera kuoneka kana nzira dzakakanganisika dzichishandiswa kuendesa zvimwe zvazvino. Kana kuputika kwemhete kwaonekwa, yakawanda copper filler inowanzowedzerwa kutenderedza nzvimbo yakashama kuti ibate panzvimbo.

Mune zvimwe zviitiko, zvinogona kukonzera matambudziko asingagadzirisiki. Kana gomba rikamiswa nenzira inobaya waya dziri padyo, PCB inozongoitwa pfupi-pfupi. Dambudziko iri rakaoma kugadzirisa nekuti rinosanganisira kuzviparadzanisa nevamwe kuburikidza nemakomba uye pfupi dunhu wiring.

Kururamisa saizi yemhete

Nepo vagadziri vePCB vaine basa rekugadzira zvishwe zvakarurama, vagadziri vanogona kuita basa mukuseta dhizaini kune saizi chaiyo. Bvumira nzvimbo yakawanda kunze kweiyo mugadziri yakatsanangurwa yekushivirira. Kugovera imwe miriyoni imwe kuhukuru hwechiuno kunokuchengetedza dambudziko kupfura gare gare.