Kugadzira yakadhindwa redunhu bhodhi (PCB) ibasa rakajairika kune vazhinji mainjiniya emagetsi (EE). Kunyangwe makore ePCB dhizaini yekuziva, kugadzira yemhando yepamusoro kuita-inotyairwa pcb dhizaini hazvisi nyore. Pane zvinhu zvakawanda zvekufunga nezvazvo, uye ndiro yezvinhu ndeimwe yacho. Izvo zvakakosha zvinhu zvinoshandiswa kugadzira PCBS zvakakosha kwazvo. Asati agadzira, zvivakwa zvechinhu muzvinhu zvakasiyana siyana zvinofanirwa kutariswa, sekushanduka, kupisa kwetembiricha, dielectric nguva dzose, dielectric simba, tensile simba, adhesion uye zvichingodaro. Iko kuita pamwe nekubatanidzwa kwebhodhi redunhu zvinoenderana zvizere nezvinhu zvinoshandiswa. Ichi chinyorwa chinowedzera kuongorora PCB zvinhu. Saka ramba wakashongedzerwa kuti uwane rumwe ruzivo.

Ndedzipi mhando dzezvinhu zvinoshandiswa muPCB yekugadzira?

Urwu ndirwo runyorwa rwezvakakosha zvinhu zvinoshandiswa kugadzira matunhu ematunhu. Ngatitarisei pazviri.

Fr-4: FR ipfupi kune MOTO RETARDENT. Iyo ndiyo inowanzo shandiswa pcb zvinhu zvemarudzi ese ePCB yekugadzira. Fiberglass yakasimbiswa epoxy laminate FR-4 inogadzirwa uchishandisa fiberglass yakarukwa machira uye murazvo unodzora resin bhainda. Ichi chinhu chakakurumbira nekuti chinopa yakanakisa magetsi ekudzivirira uye ine yakanaka michina simba. Izvi zvinopa yakasimba kwazvo tensile simba. Inozivikanwa nekugadzirwa kwayo kwakanaka uye kunyorova kunyorova.

Fr-5: Iyo substrate inogadzirwa negirazi faibha yakasimbiswa zvinhu uye epoxy resin bhainda. Iyi sarudzo yakanaka kune akawanda-maseru wedunhu bhodhi dhizaini. Inoita mushe mushe-isina waya uye ine yakanakisa mehendi zvivakwa pakakwirira tembiricha. Inozivikanwa nekunyorova kwayo kwekunyorova, kusagadzikana kwemakemikari, kugona kwazvo magetsi uye simba rakakura.

Fr-1 uye FR-2: Iyo inoumbwa bepa uye phenolic makomputa uye yakanakira kune imwechete-rukoko redunhu bhodhi dhizaini. Zvinhu zviviri izvi zvine zvinhu zvakafanana, asi FR2 ine tembiricha yepasi yekushanduka kwegirazi kupfuura FR1.

Cem-1: Izvi zvinhu ndezveboka rezvinhu zvinoumba epoxy zvinhu (CEM). Iyo seti ine epoxy synthetic resin, fiberglass machira uye isiri-fiberglass core. Iyo ficha, inoshandiswa mune imwechete-mativi edunhu mabhodhi, haina mutengo uye murazvo unodzora. Iyo inozivikanwa neakanakisa ayo mehendi uye emagetsi mashandiro.

Cem-3: Zvakafanana neCEM-1, ichi chimwe chinoumbwa epoxy zvinhu. Iine murazvo unodzora zvivakwa uye unonyanya kushandiswa kune maviri-mativi edunhu mabhodhi. Izvo zvishoma zvine michina yakasimba kupfuura FR4, asi yakachipa pane FR4. Naizvozvo, iri imwe nzira yakanaka kune FR4.

Mhangura: Mhangura ndiyo sarudzo yekutanga mukugadzirwa kweyechete uye multilayer wedunhu mabhodhi. Izvi zvinodaro nekuti inopa masimba akasimba, akanyanya kupisa uye emagetsi conductivity uye yakaderera makemikari reactivity.

Yakakwira Tg: Yakakwira Tg inoratidza tembiricha yakakwira yekuchinja tembiricha. Ichi chinhu chePCB chakanakira mabhodhi mukuda kwekushandisa. Tg zvinhu zvine yakasimba tembiricha mukurumari uye kwenguva yakareba delamination kugadzikana.

Rogers: Inowanzozivikanwa seRF, ichi chinyorwa chinozivikanwa nekuenderana kwayo neFR4 laminates. Nekuda kweiyo yakakwira terminal conductivity uye inodzorwa impedance, lead-yemahara wedunhu mabhodhi anogona kuve nyore kugadzirwa.

Aluminium: Izvi zvinowanikwa uye nyore kufema PCB zvinhu zvinodzivirira mabhodhi emhangura kubva pakupisa. Yakasarudzwa kunyanya kugona kwayo kubvisa kupisa nekukurumidza.

Halogen isina aruminiyamu: Iyi simbi yakakosha kune zvinoshamisira nharaunda. Halogen-isina aruminiyamu yakagadziridza dielectric kugara uye hunyoro diffusivity.

Kwemakore, PCBS yakawana mukurumbira wakakura uye yakawana akasiyana mafomu ekushandisa mumaindasitiri anoda maseketi akaomarara. Naizvozvo, kusarudza chaiyo pcb zvinhu zvakakosha, nekuti zvinokanganisa kwete chete mashandiro uye hunhu, asi zvakare mutengo wakazara webhodhi. Sarudza zvishandiso zvinoenderana nezvinodiwa pachishandiswa, zvakatipoteredza zvinhu, uye zvimwe zvikanganiso zvinotarisana nePCB.