Chidziwitso choyambirira cha SMT
1. Surface Mount Technology-SMT (Surface Mount Technology)
Kodi SMT ndi chiyani:
Nthawi zambiri amatanthauza kugwiritsa ntchito zida zolumikizirana zodziwikiratu kuti zilumikizane mwachindunji ndi mtundu wa solder chip ndi zida zazing'ono zopanda lead kapena zotsogola zazifupi (zotchedwa SMC/SMD, zomwe nthawi zambiri zimatchedwa chip components) pamwamba pa bolodi losindikizidwa. (PCB) Kapena ukadaulo wina wapamagetsi pazigawo zomwe zatchulidwa pamwamba pa gawo lapansi, zomwe zimadziwikanso kuti ukadaulo wapamtunda kapena ukadaulo wapamwamba, womwe umatchedwa SMT (Surface Mount Technology).
SMT (Surface Mount Technology) ndiukadaulo wamafakitale womwe ukubwera pamsika wamagetsi.Kukula kwake ndikukula mwachangu ndikusintha kwamakampani opanga zamagetsi.Imadziwika kuti "Rising Star" yamakampani opanga zamagetsi.Zimapangitsa kuti msonkhano wamagetsi ukhale wochulukira Kuthamanga komanso kosavuta, kufulumira komanso mofulumira kusinthidwa kwa zinthu zosiyanasiyana zamagetsi, kukweza mlingo wophatikizana, komanso mtengo wotsika mtengo, wathandizira kwambiri chitukuko chachangu cha IT ( Information Technology) makampani.
Ukadaulo wa Surface Mount umapangidwa kuchokera kuukadaulo wopanga ma chigawo cha zigawo.Kuyambira 1957 mpaka pano, chitukuko cha SMT chadutsa magawo atatu:
Gawo loyamba (1970-1975): Cholinga chachikulu chaukadaulo ndikugwiritsa ntchito zida zazing'ono za chip popanga ndi kupanga magetsi osakanizidwa (otchedwa ma circuits thick film in China).Kuchokera pamalingaliro awa, SMT ndiyofunikira kwambiri pakuphatikizana Njira yopangira ndi chitukuko chaukadaulo cha mabwalo athandizira kwambiri;nthawi yomweyo, SMT yayamba kugwiritsidwa ntchito kwambiri pazinthu za anthu wamba monga mawotchi apakompyuta a quartz ndi ma calculator apakompyuta.
Gawo lachiwiri (1976-1985): kulimbikitsa kufulumira kwa miniaturization ndi ntchito zambiri zamagetsi zamagetsi, ndipo zinayamba kugwiritsidwa ntchito kwambiri pazinthu monga makamera a kanema, mawailesi am'mutu ndi makamera apakompyuta;panthawi imodzimodziyo, zida zambiri zopangira makina opangira pamwamba zinapangidwa Pambuyo pa chitukuko, teknoloji yoyika ndi zipangizo zothandizira zigawo za chip zakhala zokhwima, ndikuyika maziko a chitukuko chachikulu cha SMT.
Gawo lachitatu (1986-tsopano): Cholinga chachikulu ndikuchepetsa ndalama ndikupititsa patsogolo kuchuluka kwamitengo yazinthu zamagetsi.Ndi kukula kwa teknoloji ya SMT ndi kupititsa patsogolo kudalirika kwa ndondomeko, zinthu zamagetsi zomwe zimagwiritsidwa ntchito m'magulu ankhondo ndi ndalama (magalimoto a makompyuta olankhulana ndi zida za mafakitale) zakula mofulumira.Panthawi imodzimodziyo, zida zambiri zopangira msonkhano ndi njira zowonongeka zatulukira kuti zipange zigawo za chip Kukula kofulumira kwa kugwiritsidwa ntchito kwa PCB kwathandizira kuchepa kwa mtengo wamtengo wapatali wa zinthu zamagetsi.
2. Mawonekedwe a SMT:
①Kuchulukirachulukira kwakukulu, kukula kochepa komanso kulemera kwazinthu zamagetsi.Voliyumu ndi kulemera kwa zigawo za SMD ndi pafupifupi 1/10 ya zigawo zachikhalidwe zamapulagi.Nthawi zambiri, SMT ikakhazikitsidwa, kuchuluka kwa zinthu zamagetsi kumachepetsedwa ndi 40% ~ 60% ndipo kulemera kumachepetsedwa ndi 60%.~ 80%.
②Kudalirika kwakukulu, mphamvu zotsutsana ndi kugwedezeka, komanso chiwopsezo chochepa cha solder.
③Makhalidwe abwino kwambiri, kuchepetsa kusokoneza kwa ma elekitiromu ndi mawayilesi.
④ Ndikosavuta kuzindikira makinawo ndikuwongolera magwiridwe antchito.
⑤Sungani zida, mphamvu, zida, ogwira ntchito, nthawi, ndi zina.
3. Gulu la njira zokwera pamwamba: Malingana ndi njira zosiyanasiyana za SMT, SMT imagawidwa m'magulu operekera (wave soldering) ndi ndondomeko ya solder phala (reflow soldering).
Kusiyana kwawo kwakukulu ndi:
①Njira musanayambe kuzigamba ndi yosiyana.Yoyamba imagwiritsa ntchito guluu patch ndipo yomaliza imagwiritsa ntchito phala la solder.
②Njira pambuyo pazigamba ndizosiyana.Zakale zimadutsa mu uvuni wotsitsimula kuti zichiritse guluu ndikuyika zigawozo pa bolodi la PCB.Kutentha kwa mafunde kumafunika;yotsirizirayo imadutsa mu uvuni wa reflow kwa soldering.
4. Malinga ndi ndondomeko ya SMT, ikhoza kugawidwa m'magulu otsatirawa: njira yopangira mbali imodzi, njira yopangira mbali ziwiri, njira yosakanikirana yosakanikirana.
①Sonkhanitsani pogwiritsa ntchito zida zokwera pamwamba zokha
A. Cholumikizira cha mbali imodzi chokhachokha pamwamba (njira yoyikira mbali imodzi) Njira: phala losindikizira la sikirini → zoyikapo → kusungunulanso
B. Kumanga mbali ziwiri ndi kuyika pamwamba kokha (njira yoyikira mbali ziwiri) Ndondomeko: phala losindikizira pa skrini → zoyikapo → zowonjezera zowonjezera → reflow soldering → mbali yakumbuyo → phala la sikirini → zoyikapo → zowonjezera zowonjezera
② Sonkhanitsani ndi zigawo za pamwamba pa phiri kumbali imodzi ndi kusakaniza kwa zigawo za pamwamba ndi zigawo za perforated mbali inayo (njira yosanganikirana ya mbali ziwiri)
Njira 1: phala losindikiza pa skrini (mbali yakumtunda) → zoyikapo → zowonjezera zowonjezera → mbali yakumbuyo → kugawira (mbali yakumunsi) → zoyikapo → kuchiritsa kwa kutentha kwambiri → mbali yakumbuyo → zolowetsa m'manja → kutenthetsa
Njira 2: phala losindikizira pa skrini (mbali yakumtunda) → zoyikapo → zowonjezera zowonjezera → pulagi yamakina (mbali yakumtunda) → mbali yakumbuyo → kugawa (mbali yakumunsi) → chigamba → kutentha kwapamwamba → kutenthetsa mafunde
③Pamwamba pake amagwiritsa ntchito zida zobowoleza ndipo pansi pake amagwiritsa ntchito zida zapamtunda (njira yophatikizira ya mbali ziwiri)
Njira 1: Kugawira → zowonjezera zowonjezera → kutentha kwapamwamba → mbali yobwerera kumbuyo → zoyikapo pamanja → kutenthetsa mafunde
Njira 2: Pulagi yamakina → mbali yakumbuyo → kugawa → chigamba → kuchiritsa kutentha kwambiri → kutenthetsa mafunde
Njira yeniyeni
1. Njira yosonkhanitsira mbali imodzi yapakatikati Ikani phala la solder kuti muyike zida ndikuwonjezeranso zowonjezera.
2. Pawiri-mbalimbali pamwamba pa msonkhano kayendedwe kagawo A mbali imagwiritsa ntchito solder phala phiri mount zigawo ndi reflow soldering flap B mbali imagwiritsa ntchito solder phala phiri mount zigawo ndi reflow soldering
3. Single-sided mixed assembly (SMD ndi THC zili mbali imodzi) Mbali imagwiritsa ntchito phala la solder pa phiri la SMD reflow soldering A mbali interposing THC B mbali wave soldering
4. Single-mbali-mbali yosakaniza msonkhano (SMD ndi THC ali mbali zonse za PCB) Ikani SMD zomatira pa B mbali phiri SMD zomatira kuchiritsa flap A mbali ikani THC B mbali wave solder
5. Kuyikira mbali ziwiri (THC ili mbali A, mbali zonse A ndi B zili ndi SMD) Ikani phala la solder ku mbali A kuti muyike SMD ndipo kenaka piritsani bolodi B mbali ikani SMD guluu kukweza SMD guluu kuchiritsa flip board A. mbali kuti muyike THC B Surface wave soldering
6. Kuphatikizika kwa mbali ziwiri (SMD ndi THC mbali zonse za A ndi B) Mbali ikani phala la solder pokweza SMD reflow soldering flap B mbali gwiritsani ntchito SMD guluu kukwera SMD guluu kuchiritsa chipwirikiti A mbali Ikani THC B mbali yoweyula solder B- kuwotcherera mbali Buku
Asanu.Chidziwitso cha magawo a SMT
Mitundu yamagulu a SMT omwe amagwiritsidwa ntchito kwambiri:
1. Zopinga za pamwamba pa phiri ndi potentiometers: ma rectangular chip resistors, cylindrical fixed resistors, ma network ang'onoang'ono osasunthika, ma chip potentiometers.
2. Surface mount capacitors: multilayer chip ceramic capacitors, tantalum electrolytic capacitors, aluminiyamu electrolytic capacitors, mica capacitors
3. Ma inductors okwera pamwamba: ma waya-bala chip inductors, multilayer chip inductors
4. Mikanda yamagetsi: Chip Bead, Multilayer Chip Bead
5. Zida zina za chip: chip multilayer varistor, chip thermistor, chip surface wave fyuluta, chip multilayer LC fyuluta, chip multilayer kuchedwa mzere
6. Zida zopangira semiconductor: ma diode, ma transistors ang'onoang'ono, ma transistors ang'onoang'ono ophatikizidwa ndi SOP, pulasitiki yotsogolera mabwalo ophatikizika a PLCC, phukusi la quad flat QFP, chonyamulira cha ceramic, phukusi lozungulira la BGA, CSP (Chip Scale Package)
NeoDen imapereka mayankho athunthu a mzere wa SMT, kuphatikiza uvuni wa SMT reflow, makina osokera, makina osankha ndi malo, makina osindikizira a solder, PCB loader, PCB unloader, chip mounter, SMT AOI makina, makina a SMT SPI, makina a SMT X-Ray, Zida zopangira msonkhano wa SMT, Zida zopangira PCB SMT zida zosinthira, ndi zina zilizonse makina a SMT omwe mungafune, chonde titumizireni kuti mumve zambiri:
Malingaliro a kampani Hangzhou NeoDen Technology Co., Ltd
Webusaiti 1: www.smtneoden.com
Nthawi yotumiza: Jul-23-2020