The bolodi losindikizidwa Ili ndi gawo lotetezera, bolodi ladongosolo palokha, ndi zingwe zosindikizidwa kapena zotsalira zamkuwa zomwe zimapereka njira yomwe magetsi amayendera kudera. Gawo lapansi limagwiritsidwanso ntchito ngati kutchinjiriza kwa PCB kupereka kutchinjiriza kwamagetsi pakati pamagawo. Bolodi yama multilayer imakhala ndi gawo lopitilira limodzi lomwe limalekanitsa zigawozo. Kodi lililonse PCB gawo lapansi zopangidwa?

PCB gawo lapansi

Gawo la PCB gawo lapansi liyenera kupangidwa ndi zinthu zosakondera chifukwa zimasokoneza njira yomwe idadutsa pakadali kusindikizidwa. M’malo mwake, gawo lapansi ndi insulator ya PCB, yomwe imagwira ntchito yopangira ma piezoelectric insulator oyang’anira dera. Mukalumikiza zingwe mbali ziwiri, gawo lililonse limalumikizidwa kudzera m’mabowo okutidwa.

Zipangizo zomwe zingagwiritsidwe ntchito ngati magawo abwino zimaphatikizapo fiberglass, teflon, ziwiya zadothi ndi ma polima ena. Gawo lapansi lotchuka kwambiri masiku ano mwina ndi FR-4. Fr-4 ndi fiberglass epoxy laminate yomwe ndi yotsika mtengo, imapereka magetsi abwino otetezera komanso imakhala ndi malawi ambiri kuposa fiberglass yokha.

PCB gawo lapansi

Mudzapeza mitundu isanu yayikulu yayikulu ya PCB pama board osindikizidwa. Mtundu uti wa gawo lapansi womwe ungagwiritsidwe ntchito kusindikiza komiti yoyenda molingana ndi wopanga wa PCB ndi mtundu wa pulogalamuyo. Mitundu ya gawo la PCB ndi iyi:

Fr-2: FR-2 mwina ndiye gawo lotsikirapo kwambiri la gawo lomwe mungagwiritse ntchito, ngakhale lili ndi zida zamoto, monga tawonetsera ndi dzina la FR. Zimapangidwa kuchokera kuzinthu zotchedwa phenolic, pepala loyikidwa pathupi lopangidwa ndi ulusi wamagalasi. Zipangizo zamagetsi zotsika mtengo zimakonda kugwiritsa ntchito matabwa osindikizidwa okhala ndi magawo a FR-2.

Fr-4: Chimodzi mwazinthu zofala kwambiri za PCB ndi gawo la fiberglass lolukidwa lomwe lili ndi zinthu zakuthambo zamoto. Komabe, ndi yamphamvu kuposa FR-2 ndipo siying’ambika kapena kuthyoka mosavuta, ndichifukwa chake imagwiritsidwa ntchito pazogulitsa zapamwamba. Pobowola kapena kukonza ulusi wamagalasi, opanga ma PCB amagwiritsa ntchito zida za tungsten carbide kutengera mtundu wa zinthuzo.

RF: RF kapena RF gawo lapansi la board board osindikizidwa omwe angagwiritsidwe ntchito pamagetsi apamwamba a RF. Gawo lapansi limapangidwa ndi mapulasitiki otsika a dielectric. Izi zimakupatsani mphamvu zamagetsi zamagetsi, koma makina ofooka kwambiri, chifukwa chake ndikofunikira kuti musinthe bolodi la RF kuti ligwiritse ntchito mtundu woyenera.

Kukhwima: Ngakhale matabwa a FR ndi mitundu ina yamagawo amakhala olimba, mapulogalamu ena angafunike kugwiritsa ntchito matabwa osinthika. Maseketi osinthasinthawa amagwiritsa ntchito pulasitiki kapena filimu yopyapyala, yosinthasintha. Ngakhale mbale zosinthika ndizovuta kupanga, zili ndi maubwino ena. Mwachitsanzo, mutha kupindika bolodi yosinthasintha kuti igwirizane ndi malo omwe board wamba sangathe.

Chitsulo: Pomwe ntchito yanu imakhudza zamagetsi zamagetsi, iyenera kukhala ndi magwiridwe antchito abwino.Izi zikutanthauza kuti magawo okhala ndi matenthedwe otsika (monga ziwiya zadothi) kapena zitsulo zomwe zitha kuthana ndi mafunde apamwamba pamagetsi omwe amasindikizidwa ma board omwe angagwiritsidwe ntchito.