Nhungamiro yeFR-4 kune Akadhindwa Circuits

FR-4 kana FR4's zvivakwa uye hunhu hunoita kuti iite zvakasiyana-siyana pamutengo unokwanisika. Ichi ndicho chikonzero kushandiswa kwayo kwakapararira mukugadzirwa kwedunhu rakadhindwa. Naizvozvo, zvakajairika kuti tiise chinyorwa pamusoro pazvo pablog yedu.

Muchinyorwa chino, iwe unowana zvimwe nezve:

Izvo zvivakwa uye mabhenefiti eFR4
Mhando dzakasiyana dzeFR-4
Zvinhu zvekufunga nezvazvo pakusarudza ukobvu
Sei uchisarudza FR4?
Mhando dzeFR4 dziripo kubva kuProto-Electronics

FR4 zvivakwa uye zvinhu

FR4 chiyero chinotsanangurwa neNEMA (National Electrical Manufacturers Association) yegirazi-yakasimbiswa epoxy resin laminate.

FR inomiririra "flame retardant" uye inoratidza kuti zvinhu zvacho zvinoenderana neUL94V-0 yakajairwa pakupisa kwepurasitiki. Iyo 94V-0 kodhi inogona kuwanikwa pane ese FR-4 PCBs. Inovimbisa kusapararira kwemoto uye kudzima kwayo nekukurumidza kana zvinhu zvinopisa.

Girazi yaro shanduko (TG) ndeyekurongeka kwe115 ° C kusvika 200 ° C kune High TGs kana HiTGs zvichienderana nenzira dzekugadzira uye resin inoshandiswa. Iyo yakajairwa FR-4 PCB ichava nedhiri yeFR-4 sandwiched pakati pezvikamu zviviri zvakatetepa zve laminated copper.

FR-4 inoshandisa bromine, inonzi halogen kemikari element iyo isingadziviri moto. Yakatsiva G-10, imwe musanganiswa yakanga isingamiri, mune mazhinji ekushandisa kwayo.

FR4 ine mukana wekuve neyakanaka yekudzivirira-huremu reshiyo. Iyo haitore mvura, inochengeta yakakwira mechanical simba uye ine yakanaka insulating simba munzvimbo dzakaoma kana dzakanyorova.

Mienzaniso yeFR-4

Standard FR4: sezita rayo rinoratidza, iyi ndiyo chiyero FR-4 ine kupisa kwekudzivirira kwehurongwa hwe140 ° C kusvika 150 ° C.

Iyo yakakwirira TG FR4: iyi mhando yeFR-4 ine yakakwira girazi shanduko (TG) yekutenderera 180°C.

Iyo yepamusoro CTI FR4: Comparative Tracking Index yakakwirira kupfuura 600 Volts.

FR4 isina laminated mhangura: yakanakira insulation mahwendefa uye bhodhi zvinotsigira.

Pane zvimwe zvakawanda zvehunhu hwezvinhu izvi zvakasiyana gare gare muchinyorwa.

Zvinhu zvekufunga nezvazvo pakusarudza ukobvu

Kuenderana nezvikamu: kunyangwe FR-4 ichishandiswa kugadzira marudzi mazhinji edunhu rakadhindwa, ukobvu hwayo hune mhedzisiro pamhando dzechikamu chinoshandiswa. Semuenzaniso, zvikamu zveTHT zvakasiyana kubva kune zvimwe zvikamu uye zvinoda PCB yakaonda.

Kuchengetedza nzvimbo: kuchengetedza nzvimbo kwakakosha pakugadzira PCB, kunyanya ye USB zvibatanidza uye Bluetooth accessories. Iwo thinnest mapuranga anoshandiswa mukugadzirisa umo kuchengetedza nzvimbo kwakakosha.

Dhizaini uye kuchinjika: vagadziri vazhinji vanosarudza mabhodhi akakora kune matete. Uchishandisa FR-4, kana iyo substrate yakanyanya kutetepa, inogona kunge iri panjodzi yekutyoka kana bhodhi zviyero zvakawedzerwa. Kune rimwe divi, mapuranga akakora anochinjika uye anoita kuti zvikwanise kugadzira V-grooves.

Nzvimbo iyo PCB ichashandiswa mairi inofanirwa kutariswa. Kune yemagetsi control unit mundima yekurapa, maPCB akaonda anovimbisa kuderedzwa kushushikana. Mabhodhi akaonda zvakanyanya - uye saka anochinjika - anonyanya kunetseka nekupisa. Vanogona kukotama uye kutora pakona isingadikanwi panguva yechikamu chekutengesa matanho.

Impedance control: iyo bhodhi ukobvu inoreva iyo dielectric nharaunda ukobvu, mune iyi kesi FR-4, inova ndiyo inofambisa impedance control. Kana impedance iri chinhu chakakosha, iyo bhodhi ukobvu ndiyo inotaridza danho rinofanira kuverengerwa.

Connections: mhando yezvibatanidza zvinoshandiswa kudunhu rakadhindwa zvakare rinotarisa iyo FR-4 ukobvu.

Sei uchisarudza FR4?

Mutengo unodhura weFR4s unovaita sarudzo yakajairwa yekugadzirwa kwediki diki rePCBs kana yemagetsi prototyping.

Nekudaro, FR4 haina kunaka kune yakakwira frequency akadhindwa maseketi. Saizvozvo, kana iwe uchida kuvaka maPCB ako kuita zvigadzirwa zvisingabvumire kutorwa kwezvikamu uye izvo zvisingakodzeri kuchinjika maPCB, unofanirwa kusarudza chimwe chinhu: polyimide/polyamide.

Iwo akasiyana marudzi eFR-4 anowanikwa kubva kuProto-Electronics

Standard FR4

FR4 SHENGYI mhuri S1000H
Ukobvu kubva 0.2 kusvika 3.2 mm.
FR4 VENTEC mhuri VT 481
Ukobvu kubva 0.2 kusvika 3.2 mm.
FR4 SHENGYI mhuri S1000-2
Ukobvu kubva 0.6 kusvika 3.2 mm.
FR4 VENTEC mhuri VT 47
Ukobvu kubva 0.6 kusvika 3.2 mm.
FR4 SHENGYI mhuri S1600
Standard ukobvu 1.6 mm.
FR4 VENTEC mhuri VT 42C
Standard ukobvu 1.6 mm.
Nyaya iyi igirazi epoxy isina mhangura, yakagadzirirwa kushandiswa mumapuleti ekudzivirira, ma templates, bhodhi rinotsigira, nezvimwewo. Izvo zvinogadzirwa uchishandisa Gerber type mechanical drawings kana mafaira eDXF.
Ukobvu kubva 0.3 kusvika 5 mm.