Popeza COB ilibe chimango chotsogolera cha phukusi la IC, koma m'malo mwa PCB, mapangidwe a mapepala a PCB ndi ofunika kwambiri, ndipo Malizani amatha kugwiritsa ntchito golide wa electroplated kapena ENIG, mwinamwake waya wagolide kapena waya wa aluminiyamu, kapena ngakhale Mawaya amkuwa aposachedwa kwambiri. adzakhala ndi mavuto omwe sangathe kugunda. PCB Design Zofunikira za COB 1. Mankhwala omalizidwa pamwamba pa bolodi la PCB ayenera kukhala electroplating ya golide kapena ENIG, ndipo ndi yokulirapo pang'ono kuposa kusanjikiza kwa golide kwa gulu lonse la PCB, kuti apereke mphamvu zofunikira pa Die Bonding ndikupanga golide-aluminium. kapena golidi ndi golidi yense. 2. Pamalo opangira ma waya a pad circuit kunja kwa Die Pad ya COB, yesani kulingalira kuti kutalika kwa waya wowotcherera aliyense kumakhala ndi kutalika kwake, ndiko kunena kuti, mtunda wa cholumikizira chogulitsira kuchokera ku chophatikizira kupita ku PCB. pad iyenera kukhala yosasinthasintha momwe mungathere.Malo a waya aliyense womangirira amatha kuwongoleredwa kuti achepetse vuto lafupipafupi pomwe mawaya omangirira adutsa.Choncho, mapangidwe a pad okhala ndi mizere ya diagonal samakwaniritsa zofunikira.Zikuoneka kuti PCB pad spacing akhoza kufupikitsidwa kuchotsa maonekedwe a diagonal ziyangoyango.Ndikothekanso kupanga ma elliptical pad kuti amwaze mogawaniza malo omwe ali pakati pa mawaya omangira. 3. Ndibwino kuti chowotcha cha COB chiyenera kukhala ndi malo osachepera awiri.Ndibwino kuti musagwiritse ntchito malo ozungulira a SMT achikhalidwe, koma kugwiritsa ntchito malo ozungulira, chifukwa makina a Wire Bonding (waya wogwirizanitsa) akudzipangira okha Mukayika, kuikako kumachitika pogwira mzere wowongoka. .Ndikuganiza kuti ichi ndi chifukwa palibe malo ozungulira pa chimango chotsogola, koma chimango chowongoka chakunja chokha.Mwina makina ena a Wire Bonding sali ofanana.Ndibwino kuti muyambe kutchula ntchito ya makina kuti mupange mapangidwe.
4, kukula kwa pad kufa kwa PCB kuyenera kukhala kokulirapo pang'ono kuposa chophatikizira chenicheni, chomwe chingathe kuchepetsa kuchotsera poyika chophatikizira, komanso kuteteza kuti chophatikiziracho chisazungulire kwambiri padeti yakufa.Ndikoyenera kuti mapepala ophwanyika kumbali zonse akhale okulirapo 0.25 ~ 0.3mm kuposa mtanda weniweniwo.
5. Ndibwino kuti musakhale ndi mabowo m'dera limene COB imayenera kudzazidwa ndi guluu.Ngati izo sizingapewedwe, ndi PCB fakitale chofunika kuti kwathunthu pulagi izi kudzera mabowo.Cholinga ndikuletsa mabowo kuti asalowe mu PCB panthawi ya Epoxy dispensing.mbali inayo, kubweretsa mavuto osafunikira. 6. Ndikoyenera kusindikiza chizindikiro cha Silkscreen pamalo omwe akuyenera kuperekedwa, omwe angathandize kuti ntchito yogawa ndi yogawa mawonekedwe.
Ngati muli ndi funso lililonse kapena kufunsa, lemberani! Pano .
Dziwani zambiri za ife! Pano.
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