Muukadaulo wamakono wowonetsera zamagetsi, chiwonetsero cha LED chimagwiritsidwa ntchito kwambiri pazikwangwani zama digito, maziko a siteji, zokongoletsera zamkati ndi magawo ena chifukwa cha kuwala kwake kwakukulu, tanthauzo lapamwamba, moyo wautali ndi zabwino zina. Pakupanga chiwonetsero cha LED, ukadaulo wa encapsulation ndiye ulalo wofunikira. Mwa iwo, ukadaulo wa SMD encapsulation ndi ukadaulo wa COB encapsulation ndi ziwiri zazikuluzikulu za encapsulation. Ndiye pali kusiyana kotani pakati pawo? Nkhaniyi ikuwunikirani mozama.
1.kodi SMD ma CD luso, SMD ma CD mfundo
Phukusi la SMD, dzina lathunthu la Surface Mounted Device (Surface Mounted Device), ndi mtundu wazinthu zamagetsi zomwe zimalumikizidwa mwachindunji ndi ukadaulo wosindikizira wa board (PCB) pamwamba. luso limeneli kudzera mwatsatanetsatane maikidwe makina, ndi encapsulated LED chip (kawirikawiri lili LED kuwala-emitting diode ndi zigawo zofunika dera) molondola anaika pa ziyangoyango PCB, ndiyeno kupyolera soldering reflow ndi njira zina kuzindikira magetsi connection.SMD ma CD ma CD. ukadaulo umapangitsa kuti zida zamagetsi zikhale zazing'ono, zopepuka kulemera kwake, komanso zimathandizira kupanga zinthu zamagetsi zamagetsi zophatikizika komanso zopepuka.
2.The Ubwino Ndi Kuipa Kwa SMD Packaging Technology
2.1 SMD Packaging Technology Ubwino
(1)kukula kochepa, kulemera kochepa:Zida zopangira ma SMD ndi zazing'ono kukula, zosavuta kuphatikizira kachulukidwe kakang'ono, zimathandizira kupanga mapangidwe amagetsi ang'onoang'ono komanso opepuka.
(2)mawonekedwe abwino afupipafupi:zikhomo zazifupi ndi njira zazifupi zolumikizira zimathandizira kuchepetsa inductance ndi kukana, kukonza magwiridwe antchito apamwamba.
(3)Zoyenera kupanga zokha:oyenera kupanga makina oyika makina, kukonza magwiridwe antchito komanso kukhazikika kwabwino.
(4)Kuchita bwino kwa kutentha:kukhudzana mwachindunji ndi pamwamba pa PCB, kuthandizira kutentha kwapang'onopang'ono.
2.2 SMD Packaging Technology Zoyipa
(1)kukonza zovuta: ngakhale njira yowonjezera pamwamba imapangitsa kuti zikhale zosavuta kukonzanso ndikusintha zigawo, koma pankhani ya kuphatikizika kwapamwamba kwambiri, m'malo mwa zigawo zamtundu uliwonse zingakhale zovuta kwambiri.
(2)Malo ochepa ochotsera kutentha:makamaka kudzera pa pedi ndi kutentha kwa gel osakaniza, ntchito yayitali yayitali imatha kubweretsa kutentha kwambiri, zomwe zimakhudza moyo wautumiki.
3.kodi luso la COB packaging, COB packaging mfundo
Phukusi la COB, lomwe limadziwika kuti Chip on Board (Chip on Board package), ndi chipangizo chopanda kanthu chomwe chimalumikizidwa mwachindunji paukadaulo wapa PCB. Njira yeniyeni ndi chip chopanda kanthu (chip body ndi I / O terminals mu kristalo pamwambapa) ndi zomatira kapena zomata zotentha zomangika ku PCB, ndiyeno kudzera pawaya (monga aluminiyamu kapena waya wagolide) mu akupanga, pansi pakuchitapo kanthu. Kuthamanga kwa kutentha, ma terminals a I / O a chip ndi ma PCB amalumikizidwa, ndipo pamapeto pake amasindikizidwa ndi chitetezo chomatira utomoni. Kuphatikizikaku kumachotsa njira zachikhalidwe zopangira nyali za LED, ndikupangitsa kuti phukusi likhale lophatikizika.
4.Ubwino ndi kuipa kwaukadaulo wapackage wa COB
4.1 Ubwino waukadaulo wapackage wa COB
(1) phukusi laling'ono, laling'ono:kuchotsa zikhomo zapansi, kuti mukwaniritse phukusi laling'ono.
(2) Kuchita bwino kwambiri:waya wagolide wolumikiza chip ndi bolodi lozungulira, mtunda wotumizira ma siginecha ndi waufupi, kuchepetsa crosstalk ndi inductance ndi zinthu zina kuti ziwongolere magwiridwe antchito.
(3) Kutentha kwabwino:Chipcho chimawotchedwa mwachindunji ku PCB, ndipo kutentha kumachotsedwa pa bolodi lonse la PCB, ndipo kutentha kumachotsedwa mosavuta.
(4) Chitetezo champhamvu:kamangidwe kotsekedwa bwino, kopanda madzi, kusungira chinyezi, fumbi, anti-static ndi ntchito zina zoteteza.
(5) mawonekedwe abwino:monga gwero la kuwala pamwamba, maonekedwe a mtunduwo ndi omveka bwino, omveka bwino kwambiri, oyenerera kuyang'anitsitsa kwa nthawi yaitali.
4.2 Zoyipa zaukadaulo wapackage wa COB
(1) zovuta kukonza:Chip ndi PCB kuwotcherera mwachindunji, sangathe disassembled payokha kapena m'malo Chip, ndalama yokonza ndi mkulu.
(2) zofunika kupanga okhwima:ndondomeko ma CD zofunika zachilengedwe ndi okwera kwambiri, salola fumbi, static magetsi ndi zinthu zina kuipitsa.
5. Kusiyana pakati pa teknoloji yopangira ma SMD ndi teknoloji ya COB yonyamula
Ukadaulo wa SMD encapsulation ndi ukadaulo wa COB encapsulation m'munda wa chiwonetsero cha LED aliyense ali ndi mawonekedwe ake apadera, kusiyana pakati pawo kumawonekera makamaka mu encapsulation, kukula ndi kulemera kwake, magwiridwe antchito a kutentha, kumasuka kwa kukonza ndi zochitika zogwiritsira ntchito. Kuyerekeza ndi kusanthula kwatsatanetsatane:
5.1 Njira yopakira
⑴Ukadaulo wopakira wa SMD: dzina lonse ndi Surface Mounted Device, yomwe ndi ukadaulo wolongedza womwe umagulitsa chip cha LED chopakidwa pamwamba pa bolodi losindikizidwa (PCB) kudzera pamakina olondola. Njirayi imafuna kuti chipangizo cha LED chisankhidwe pasadakhale kuti chipange chigawo chodziyimira pawokha kenako ndikuchiyika pa PCB.
⑵Tekinoloje yonyamula ya COB: dzina lathunthu ndi Chip on Board, lomwe ndi ukadaulo wazolongedza womwe umagulitsa mwachindunji chip chopanda kanthu pa PCB. Imathetsa kuyika kwa mikanda yachikhalidwe ya nyali ya LED, imamangiriza chip chopanda kanthu ku PCB ndi guluu woyendetsa kapena wotenthetsera, ndikuzindikira kulumikizana kwamagetsi kudzera pawaya wachitsulo.
5.2 Kukula ndi kulemera kwake
⑴Kupaka kwa SMD: Ngakhale kuti zigawozo ndi zazing'ono kukula kwake, kukula kwake ndi kulemera kwake kumakhalabe kochepa chifukwa cha mapangidwe ake ndi zofunikira za pad.
Phukusi la ⑵COB: Chifukwa chosiya zikhomo zapansi ndi chipolopolo cha phukusi, phukusi la COB limakwaniritsa kuphatikizika kwambiri, ndikupangitsa phukusi kukhala locheperako komanso lopepuka.
5.3 Ntchito yochotsa kutentha
⑴Kupaka kwa SMD: Makamaka amataya kutentha kudzera pamapadi ndi ma colloids, ndipo malo otenthetsera kutentha amakhala ochepa. Pansi pa kuwala kwambiri komanso kulemedwa kwakukulu, kutentha kumatha kukhazikika m'dera la chip, zomwe zimakhudza moyo ndi kukhazikika kwa chiwonetserochi.
Phukusi la ⑵COB: Chipchi chimawotchedwa mwachindunji pa PCB ndipo kutentha kumatha kutayidwa kudzera pa bolodi lonse la PCB. Kapangidwe kameneka kamathandizira kwambiri kutulutsa kutentha kwa chiwonetserochi ndikuchepetsa kulephera chifukwa cha kutentha kwambiri.
5.4 Kusamalira bwino
⑴Kupaka kwa SMD: Popeza zigawozo zimayikidwa pawokha pa PCB, ndizosavuta kusintha gawo limodzi pakukonza. Izi ndizothandiza kuchepetsa ndalama zokonzera komanso kuchepetsa nthawi yokonza.
Kupaka kwa ⑵COB: Popeza chip ndi PCB zimawotcherera mwachindunji, ndizosatheka kugawa kapena kusintha chip padera. Pamene cholakwika chikachitika, nthawi zambiri ndikofunikira kusintha bolodi lonse la PCB kapena kulibwezera ku fakitale kuti likonzenso, zomwe zimawonjezera mtengo ndi zovuta kukonza.
5.5 Zochitika zogwiritsira ntchito
⑴Kupaka kwa SMD: Chifukwa chakukhwima kwake komanso kutsika mtengo kopangira, imagwiritsidwa ntchito kwambiri pamsika, makamaka m'mapulojekiti omwe ndi otsika mtengo komanso amafunikira kukonza bwino, monga zikwangwani zakunja ndi makoma a TV amkati.
Kupaka kwa ⑵COB: Chifukwa chakuchita bwino komanso kutetezedwa kwakukulu, ndikoyenera kwambiri zowonetsera zamkati zamkati, zowonetsera pagulu, zipinda zowunikira ndi zochitika zina zokhala ndi zofunikira zowonetsera zapamwamba komanso malo ovuta. Mwachitsanzo, m'malo olamulira, ma studio, malo akuluakulu otumizira anthu ndi malo ena omwe ogwira ntchito amawonera chinsalu kwa nthawi yayitali, ukadaulo wa COB umapereka chidziwitso chowoneka bwino komanso chofananira.
Mapeto
Ukadaulo wamapaketi a SMD ndi ukadaulo wakuyika wa COB aliyense ali ndi maubwino ake apadera komanso mawonekedwe ogwiritsira ntchito pazowonetsa zowonetsera za LED. Ogwiritsa ntchito ayenera kuyeza ndikusankha malinga ndi zosowa zenizeni posankha.
Ukadaulo wamapaketi a SMD ndi ukadaulo wonyamula wa COB uli ndi zabwino zawo. Ukadaulo wapackage wa SMD umagwiritsidwa ntchito kwambiri pamsika chifukwa cha kukhwima kwake komanso mtengo wotsika wopanga, makamaka m'mapulojekiti omwe ndi otsika mtengo komanso amafunikira kukonza bwino. Ukadaulo wamapaketi a COB, kumbali ina, uli ndi mpikisano wamphamvu pamawonekedwe apamwamba amkati amkati, zowonetsera pagulu, zipinda zowunikira ndi magawo ena okhala ndi ma CD ake ophatikizika, magwiridwe antchito apamwamba, kutentha kwabwino komanso chitetezo champhamvu.
Nthawi yotumiza: Sep-20-2024
