Kodi tiyenera kuchita chiyani pamaso pa SMT ma PCB panthawi ya msonkhano wa PCB?
PCBFuture ili ndi fakitale yosonkhanitsa smt, yomwe imatha kupereka ntchito za msonkhano wa SMT pazigawo zazing'ono kwambiri za 0201.Ndi chithandizo njira zosiyanasiyana processing mongamsonkhano wa turnkey PCBndi pcba OEM misonkhano.Tsopano, ndikudziwitsani Zomwe muyenera kuchita musanayambe kukonza SMT PCB?
1.Kuwunika kwa zigawo za SMT
Zinthu zowunikira zikuphatikiza: solderability, pin coplanarity ndi usability, zomwe ziyenera kutsatiridwa ndi dipatimenti yoyendera.Kuyesa solderability wa zigawo zikuluzikulu, titha kugwiritsa ntchito zosapanga dzimbiri tweezers kuti atseke chigawo chimodzi ndi kumizidwa mu mphika malata pa 235±5℃ kapena 230±5℃, ndi kuzichotsa pa 2±0.2s kapena 3±0.5s.Tiyenera kuyang'ana momwe mapeto a kuwotcherera alili pansi pa 20x microscope.Pamafunika kuti kuposa 90% ya kuwotcherera mapeto a zigawo zikuluzikulu anyowetsedwa ndi malata.
Ntchito yathu yochitira msonkhano wa SMT idzachita zowunikira m'munsimu:
1.1 Titha kuyang'ana malekezero awotcherera kapena mapini a zigawo za oxidation kapena kuipitsidwa mowoneka kapena ndi galasi lokulitsa.
1.2 Mtengo wotchulidwa, ndondomeko, chitsanzo, kulondola, ndi miyeso yakunja ya zigawozo ziyenera kugwirizana ndi zofunikira za PCB.
1.3 Zikhomo za SOT ndi SOIC sizingakhale zopunduka.Pazida zotsogola zambiri za QFP zokhala ndi mayendedwe otsogola osakwana 0.65mm, kuphatikizika kwa zikhomo kuyenera kukhala kochepera 0.1mm ndipo titha kuyang'ana ndi mounter optical inspection.
1.4 Kwa PCBA yomwe imafuna kuyeretsa kwa SMT patch processing, chizindikiro cha zigawozo sichiyenera kugwa pambuyo poyeretsa, ndipo sichingakhudze ntchito ndi kudalirika kwa zigawozo.Kuti tikhoza kuyang'ana zowoneka pambuyo kuyeretsa.
2Kuwunika kwa PCB
2.1 Mtundu wa malo a PCB ndi kukula kwake, chigoba cha solder, chophimba cha silika, ndi zoikamo za mabowo ziyenera kukwaniritsa zofunikira pakupanga ma board osindikizidwa a SMT.Titha kuwona kuti kutalika kwa pad ndikoyenera, chinsalucho chimasindikizidwa pa pad, ndipo kudzera pamapangidwa pa pad, ndi zina.
2.2 Miyeso ya PCB iyenera kukhala yosasinthasintha, ndipo miyeso, mabowo oyika, ndi zizindikiro za PCB ziyenera kukwaniritsa zofunikira za zida zopangira.
2.3 PCB yovomerezeka yopindika kukula:
2.3.1 M'mwamba / otukukirani: pazipita 0.2mm/50mm kutalika ndi pazipita 0.5mm/utali wa PCB lonse.
2.3.2 Pansi / concave: pazipita 0.2mm/50mm kutalika ndi pazipita 1.5mm/utali wa PCB lonse.
2.3.3 Tiyenera kuyang'ana ngati PCB ili ndi kachilombo kapena yonyowa.
3Njira zodzitetezera pa SMT PCB:
3.1 Katswiri amavala mphete yoyang'aniridwa ndi electrostatic.Tisanayambe plug-in, tiyenera kuyang'ana zida zamagetsi za dongosolo lililonse zilibe zolakwika / kusakaniza, zowonongeka, zowonongeka, zokopa, ndi zina zotero.
3.2 Pulagi-mu bolodi la PCB ayenera kukonzekera zipangizo zamagetsi pasadakhale, ndipo zindikirani malangizo a capacitor polarity ayenera kukhala olondola.
3.3 Ntchito yosindikiza ya SMT ikamalizidwa, yang'anani zinthu zomwe zili ndi zolakwika monga kusasowa kuyika, kuyika mobwerera kumbuyo, ndi kusanja bwino, ndi zina zambiri, ndikuyika malata a PCB munjira ina.
3.4 Chonde valani mphete yamagetsi pamaso pa SMT PCB panthawi ya msonkhano wa PCB.Chitsulo chachitsulo chiyenera kukhala pafupi ndi khungu la dzanja ndikukhazikika bwino.Gwirani ntchito mosinthana ndi manja awiri.
3.5 Zida zachitsulo monga USB, soketi ya IF, chivundikiro chotchinjiriza, chochunira ndi doko la netiweki ziyenera kuvala machira a zala polumikiza.
3.6 Malo ndi malangizo a zigawozo ziyenera kukhala zolondola.Zomwe zili pamwambazi ziyenera kukhala zosalala pamwamba pa bolodi, ndipo zigawo zokwezeka ziyenera kuikidwa pa phazi la K.
3.7 Ngati zinthuzo sizikugwirizana ndi zomwe zili pa SOP ndi BOM, ziyenera kudziwitsidwa kwa woyang'anira kapena mtsogoleri wa gulu panthawi yake.
3.8 Nkhaniyi iyenera kusamaliridwa mosamala.Musapitirize kugwiritsa ntchito PCB ndi zigawo zowonongeka, ndipo kristalo oscillator sangathe kugwiritsidwa ntchito itatha.
3.9 Chonde konzekerani ndikusunga malo ogwirira ntchito paukhondo musanagwire ntchito ndi kusiya ntchito.
3.10 Kutsatira mosamalitsa malamulo oyendetsera ntchito.PCB m'dera loyamba loyang'ana, malo oti afufuzidwe, malo olakwika, malo osungiramo zinthu, ndi malo otsika kwambiri osaloledwa kuti azikhala mwachisawawa.
4N'chifukwa chiyani kusankha PCBFuture utumiki wanu pcb msonkhano?
4.1Chitsimikizo cha mphamvu
4.1.1 Workshop: Ili ndi zida zochokera kunja, zomwe zimatha kutulutsa mfundo 4 miliyoni patsiku.Njira iliyonse ili ndi QC yomwe imatha kusunga khalidwe la PCB.
4.1.2 DIP kupanga mzere: Pali awiri yoweyula makina soldering, ndipo tili ndi antchito odziwa zambiri kuposa zaka zitatu.Ogwira ntchito ndi aluso kwambiri ndipo amatha kuwotcherera zida zosiyanasiyana zamapulagi.
4.2Chitsimikizo chamtengo wapatali, chokwera mtengo
4.2.1 zida mkulu-mapeto akhoza muiike mwatsatanetsatane zooneka mbali, BGA, QFN, 0201 zipangizo.Itha kugwiritsidwanso ntchito pachigamba chachitsanzo ndikuyika zida zochulukira ndi dzanja.
4.2.2 Onsechitsanzo pcb msonkhano utumiki, voliyumu pcb msonkhanontchito zitha kuperekedwa.
4.3Kudziwa zambiri mu SMT PCB ndi soldering ya PCB, ndipo ndi nthawi yobereka yokhazikika.
4.3.1 Ntchito zosonkhanitsidwa kumakampani masauzande ambiri amagetsi, kuphatikiza msonkhano wa SMT wamitundu yosiyanasiyana ya zida zamagalimoto ndi ma boardboard owongolera mafakitale.Msonkhano wa PCB ndi PCB umatumizidwa ku Ulaya ndi United States, ndipo khalidweli limatsimikiziridwa ndi makasitomala.
4.3.2 Kutumiza pa nthawi yake.Masiku abwinobwino a 3-5 ngati zida zatha ndikuthetsa EQ, ndipo magulu ang'onoang'ono amathanso kutumizidwa tsiku limodzi.
4.4Kukhoza kwamphamvu kukonza komanso kuchita bwino pambuyo pogulitsa
4.4.1 Wokonza injiniya ali ndi zambiri ndipo amatha kukonza ma PCB opanda pake chifukwa cha kuwotcherera patch osiyanasiyana.Titha kuwonetsetsa kulumikizidwa kwa PCB iliyonse.
4.4.2 Ntchito yamakasitomala imayankha pa ola la 24 ndikuthetsa mavuto anu oyitanitsa mwachangu momwe mungathere.
Nthawi yotumiza: Feb-28-2021