Iyo chip ndiyo yatinodaidza kuti IC, iyo inoumbwa nekristaro sosi uye yekunze kurongedza, idiki se transistor, uye komputa yedu CPU ndiyo yatinodaidza kuti IC.Kazhinji, inoiswa paPCB kuburikidza nemapini (kureva, Iyo bhodhi redunhu rawataura), iro rakakamurwa kuva akasiyana vhoriyamu mapakeji, kusanganisira yakananga plug uye chigamba.Kune zvakare asina kuiswa zvakananga paPCB, senge yedu komputa CPU.Kuti zvive nyore kutsiva, inogadziriswa pairi nenzira yezvigadziko kana mapini.Bumpu dema, senge muwachi yemagetsi, rakanamwa paPCB.Semuyenzaniso, vamwe zvemagetsi hobbyists havana akakodzera PCB, saka zvakare zvinokwanisika kuvaka rakadururwa zvakananga kubva pini flying waya.
Iyo chip inofanira "kuiswa" pabhodhi redunhu, kana kuti "soldering" kuti ive chaiyo.Iyo chip inofanira kutengeswa pabhodhi redunhu, uye bhodhi redunhu rinogadza kubatana kwemagetsi pakati pechiputi uye chip kuburikidza ne "trace".Bhodhi redunhu ndiro mutakuri wezvikamu, izvo zvisingagadzirisi chip chete asiwo zvinovimbisa kubatanidzwa kwemagetsi uye inovimbisa kushanda kwakasimba kwechipi chimwe nechimwe.
chip pin
Iyo chip ine mapini akawanda, uye chip zvakare inomisikidza hukama hwemagetsi ekubatanidza nemamwe machipi, zvikamu, uye masekete kuburikidza nemapini.Iyo yakawanda inoshanda chip, iyo yakawanda mapini inayo.Zvinoenderana neakasiyana pinout mafomu, anogona kukamurwa kuita LQFP akatevedzana pasuru, QFN akatevedzana pasuru, SOP akatevedzana pasuru, BGA akatevedzana pasuru uye DIP akatevedzana mu-mutsara pasuru.Sezvinoratidzwa pasi apa.
PCB bhodhi
Mabhodhi edunhu akajairika anowanzo girini oiri, anonzi PCB mabhodhi.Pamusoro pegirinhi, mavara anowanzoshandiswa ndeebhuruu, dema, dzvuku, etc. Pane mapedhi, mitsetse, uye vias paPCB.Kurongeka kwemapadhi kunopindirana nekuputirwa kwechip, uye machipisi nemapadhi anogona kutengeswa zvinoenderana nekutengesa;nepo maronda uye vias zvinopa hukama hwemagetsi.Iyo PCB board inoratidzwa mumufananidzo uri pazasi.
Mabhodhi ePCB anogona kukamurwa kuita maviri-layer board, mana-layer board, matanhatu-layer board, uye kunyange mamwe akaturikidzana zvichienderana nehuwandu hwematanho.Iyo inowanzoshandiswa PCB mapuranga anonyanya FR-4 zvinhu, uye zvakajairika ukobvu 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.6mm, 2.0mm, etc. Iri rakaoma redunhu bhodhi, uye imwe yacho. iri nyoro, inonzi flexible circuit board.Semuenzaniso, tambo dzinochinjika senge mbozhanhare nemakomputa mabhodhi edunhu anochinjika.
welding zvishandiso
Kutengesa chip, chigadziro chekutengesa chinoshandiswa.Kana iri manual soldering, unofanira kushandisa magetsi solder iron, solder wire, flux uye mamwe maturusi.Manual welding inokodzera nhamba shoma yemasamples, asi haina kukodzera kugadzirwa kwemazhinji, nekuda kwekushomeka kwesimba, kusarongeka, uye matambudziko akasiyana sekushaikwa kwewelding uye welding yenhema.Ikozvino dhigirii remakanisa ririkukwira nekukwira, uye SMT chip component welding inzira yakakura kwazvo yakamisikidzwa maindasitiri.Kuita uku kuchasanganisira michina yekukwesha, michina yekuisa, mahovhoni ekuyerera, kuongororwa kweAOI nemimwe midziyo, uye dhigirii re automation rakakwira zvakanyanya., The consistency yakanaka kwazvo, uye chiyero chekukanganisa chakanyanya kuderera, izvo zvinovimbisa kutakurwa kwehuwandu hwezvigadzirwa zvemagetsi.SMT inogona kunzi ndiyo indasitiri yezvivakwa zveindasitiri yemagetsi.
Iyo yakakosha maitiro eSMT
SMT inzira yakamisikidzwa yemaindasitiri, inosanganisira PCB nekuongorora uye kuona kwezvinhu zvinouya, kurodha muchina, solder paste/red glue brushing, kuiswa muchina, reflow oveni, kuongorora kweAOI, kuchenesa uye mamwe maitiro.Hapana kukanganisa kunogona kuitwa mune chero chinongedzo.Iyo inouya yezvinhu cheki chinongedzo inonyanya kuvimbisa kurongeka kwezvinhu.Muchina wekuisa unofanirwa kurongwa kuti uone kuiswa uye gwara rechikamu chimwe nechimwe.Iyo solder paste inoshandiswa kune mapadhi ePCB kuburikidza nesimbi mesh.Upper uye reflow soldering inzira yekudziisa nekunyungudusa solder paste, uye AOI ndiyo maitiro ekuongorora.
Iyo chip inofanirwa kutengeswa pabhodhi redunhu, uye bhodhi redunhu haringogone kuita basa rekugadzirisa chip asi zvakare kuve nechokwadi chekubatanidza magetsi pakati pemachipisi.
Nguva yekutumira: Chivabvu-09-2022