Mabokosi osindikizira ndi zigawo zofunikira pazida zambiri zamagetsi. Ma PCB amasiku ano ali ndi zigawo zingapo kwa iwo: gawo lapansi, mayendedwe, chigoba cha solder, ndi silkscreen. Chimodzi mwazinthu zofunika kwambiri pa PCB ndi mkuwa, ndipo pali zifukwa zingapo zomwe mkuwa umagwiritsidwa ntchito m'malo mwa alloys ena monga aluminiyamu kapena malata.
Kodi ma PCB Amapangidwa Ndi Chiyani?
Zonenedwa ndi kampani yopanga ma PCB, ma PCB amapangidwa ndi chinthu chotchedwa substrate, chomwe chimapangidwa ndi fiberglass yomwe imalimbikitsidwa ndi epoxy resin. Pamwamba pa gawo lapansili pali chojambula chamkuwa chomwe chimatha kumangirizidwa mbali zonse ziwiri kapena chimodzi chokha. Gawo lapansi likapangidwa, opanga amayika zigawozo. Amagwiritsa ntchito chigoba cha solder ndi silkscreen pamodzi ndi resistors, capacitors, transistors, diode, ma circuit chips, ndi zina zapadera kwambiri.
Chifukwa chiyani Copper Foil Amagwiritsidwa Ntchito mu PCBs?
Opanga PCB amagwiritsa ntchito mkuwa chifukwa ali ndi mphamvu zapamwamba zamagetsi ndi matenthedwe. Pamene magetsi akuyenda pamodzi ndi PCB, mkuwa umateteza kutentha kuti zisawononge ndikugogomezera PCB yonse. Ndi ma aloyi ena - monga aluminiyamu kapena malata - PCB imatha kutentha mosiyanasiyana komanso kusagwira ntchito bwino.
Copper ndiye aloyi yomwe amakonda kwambiri chifukwa imatha kutumiza ma sign amagetsi pa bolodi popanda vuto lililonse kutaya kapena kuchepetsa magetsi. Kuchita bwino kwa kutentha kwa kutentha kumapangitsa kuti opanga akhazikitse masitima apamwamba a kutentha pamwamba. Mkuwa wokha ndiwothandiza, monga ounce wamkuwa amatha kuphimba phazi lalikulu la gawo lapansi la PCB pa 1.4 thousandths of inchi kapena 35 micrometer wandiweyani.
Mkuwa ndi wabwino kwambiri chifukwa uli ndi electron yaulere yomwe imatha kuyenda kuchokera ku atomu imodzi kupita ku ina popanda kuchedwetsa. Chifukwa imakhalabe yothandiza kwambiri pamlingo wowonda kwambiri momwe imachitira pamilingo yokulirapo, mkuwa pang'ono umapita kutali.
Mkuwa ndi Zitsulo Zina Zamtengo Wapatali Zogwiritsidwa Ntchito M'ma PCB
Anthu ambiri amazindikira ma PCB kukhala obiriwira. Koma, nthawi zambiri amakhala ndi mitundu itatu pamtunda wakunja: golide, siliva, ndi wofiira. Amakhalanso ndi mkuwa woyera mkati ndi kunja kwa PCB. Zitsulo zina pa bolodi lozungulira zimawoneka zamitundu yosiyanasiyana. Gulu la golidi ndilokwera mtengo kwambiri, lasiliva lachiwiri liri ndi mtengo wachiwiri, ndipo chofiira ndi chotsika mtengo kwambiri.
Kugwiritsa Ntchito Immersion Gold mu PCBs
mkuwa pa bolodi losindikizidwa
Chosanjikiza chopangidwa ndi golide chimagwiritsidwa ntchito polumikizira shrapnel ndi zigawo zamagulu. Kumizidwa kwa golide wosanjikiza kulipo kuti aletse kusamuka kwa maatomu akumtunda. Chosanjikizacho sichimangokhala golide mumtundu, koma chimapangidwa ndi golide weniweni. Golide ndi woonda kwambiri koma ndi wokwanira kukulitsa moyo wa zigawo zomwe zimayenera kugulitsidwa. Golide amalepheretsa kuti zida zogulitsira zisawonongeke pakapita nthawi.
Kugwiritsa ntchito Immersion Silver mu PCBs
Silver ndi chitsulo china chomwe chimagwiritsidwa ntchito popanga PCB. Ndiotsika mtengo kwambiri kuposa kumizidwa kwa golide. Kumizidwa kwa siliva kungagwiritsidwe ntchito m'malo momiza golide chifukwa kumathandizanso kulumikizana, komanso kumachepetsa mtengo wonse wa bolodi. Kumiza siliva kumagwiritsidwa ntchito nthawi zambiri mu ma PCB omwe amagwiritsidwa ntchito pamagalimoto ndi zotumphukira zamakompyuta.
Copper Clad Laminate mu PCBs
M'malo momiza, mkuwa umagwiritsidwa ntchito ngati chovala. Ichi ndi chosanjikiza chofiira cha PCB, ndipo ndicho chitsulo chomwe chimagwiritsidwa ntchito kwambiri. PCB imapangidwa kuchokera ku mkuwa ngati chitsulo choyambira, ndipo ndikofunikira kuti mabwalo agwirizane ndikulankhulana bwino.
Kodi Copper Foil Amagwiritsidwa Ntchito Bwanji mu PCBs?
Mkuwa uli ndi ntchito zingapo mu PCBs, kuchokera ku laminate yovala zamkuwa mpaka kumayendedwe. Mkuwa ndi wofunikira kuti ma PCB azigwira ntchito moyenera.
Kodi PCB Trace ndi chiyani?
Tsatanetsatane wa PCB ndi momwe zimamvekera, njira yoti dera lizitsatira. Kufufuza kumaphatikizapo maukonde amkuwa, mawaya, ndi kutsekereza, komanso ma fuse ndi zigawo zomwe zimagwiritsidwa ntchito pa bolodi.
Njira yosavuta yomvetsetsa njira ndiyo kuiganizira ngati msewu kapena mlatho. Kuti magalimoto azitha kukhalamo, mzerewo uyenera kukhala wokulirapo kuti ugwire osachepera awiri aiwo. Iyenera kukhala yokhuthala mokwanira kuti isagwe pansi popanikizika. Ayeneranso kupangidwa ndi zinthu zomwe zingapirire kulemera kwa magalimoto omwe amayendamo. Koma, mayendedwe amachita zonsezi pamlingo wocheperako kusuntha magetsi osati magalimoto.
Zithunzi za PCB Trace
Pali zigawo zingapo zomwe zimapanga kufufuza kwa PCB. Iwo ali ndi ntchito zosiyanasiyana zomwe ziyenera kuchitidwa kuti gululo ligwire ntchito yake mokwanira. Mkuwa uyenera kugwiritsidwa ntchito kuthandiza ofufuzawo kugwira ntchito zawo, ndipo popanda PCB, sitikanakhala ndi zida zamagetsi. Tangoganizani dziko lopanda mafoni a m'manja, ma laputopu, opanga khofi, ndi magalimoto. Izi ndi zomwe tikanakhala nazo ngati ma PCB sanagwiritse ntchito mkuwa.
PCB Tsatirani Makulidwe
Mapangidwe a PCB amatengera makulidwe a bolodi. The makulidwe adzakhudza bwino ndi kusunga zigawo zikuluzikulu kugwirizana.
PCB Trace Width
M'lifupi mwa kufufuza ndikofunikanso. Izi sizimakhudza bwino kapena kulumikizidwa kwa zigawozo, koma zimasunga kusamutsidwa kwapano popanda kutenthedwa kapena kuwononga bolodi.
PCB Trace Current
The PCB trace current ndiyofunika chifukwa izi ndi zomwe gulu limagwiritsa ntchito kusuntha magetsi kudzera mu zigawo ndi mawaya. Mkuwa umathandizira kuti izi zichitike, ndipo electron yaulere pa atomu iliyonse imayenda bwino pa bolodi.
Chifukwa chiyani Copper Foil pa pcbs
Njira yopangira ma PCB
Njira yopangira PCB ndiyomweyi. Makampani ena amachita mwachangu kuposa ena, koma onse amagwiritsa ntchito njira ndi zida zofanana. Masitepe ndi awa:
Pangani maziko kuchokera ku fiberglass ndi resins
Ikani zigawo zamkuwa pa maziko
Dziwani ndikukhazikitsa machitidwe amkuwa
Tsukani bolodi mukusamba
Onjezani chigoba cha solder kuti muteteze PCB
Ikani silkscreen pa PCB
Ikani ndikugulitsa zopinga, mabwalo ophatikizika, ma capacitor, ndi zina
Yesani PCB
Ma PCB amafunika kukhala ndi zida zapadera kuti azigwira ntchito bwino. Chimodzi mwazinthu zofunika kwambiri pa PCB ndi mkuwa. Aloyiyi imafunika kuyendetsa magetsi pazida zomwe ma PCB aziyika. Popanda mkuwa, zipangizo sizingagwire ntchito chifukwa magetsi sadzakhala ndi alloy kuti adutse.
Nthawi yotumiza: Apr-25-2022