1. Mukaphika ma PCB akulu akulu, gwiritsani ntchito makonzedwe opingasa. Ndibwino kuti chiwerengero chachikulu cha stack chisapitirire zidutswa 30. Uvuni uyenera kutsegulidwa mkati mwa mphindi 10 mutatha kuphika kuti mutenge PCB ndikuyiyika pansi kuti iziziritse. Pambuyo kuphika, iyenera kukakamizidwa. Zida za anti-bend. Ma PCB akulu akulu savomerezedwa kuti aziphika molunjika, chifukwa ndi osavuta kupindika.
2. Mukamaphika ma PCB ang'onoang'ono ndi apakatikati, mutha kugwiritsa ntchito stacking yosalala. Chiwerengero chochuluka cha stack chikulimbikitsidwa kuti chisapitirire zidutswa 40, kapena chikhoza kukhala chowongoka, ndipo chiwerengerocho sichimachepa. Muyenera kutsegula uvuni ndikuchotsa PCB mkati mwa mphindi 10 zophika. Lolani kuti zizizizira, ndikusindikiza jig yotsutsa-bending mutatha kuphika.
Kusamala pamene PCB kuphika
1. Kutentha kophika sikuyenera kupitirira nsonga ya Tg ya PCB, ndipo zofunikira zonse siziyenera kupitirira 125 ° C. M'masiku oyambirira, Tg point ya ma PCB okhala ndi mtovu inali yotsika kwambiri, ndipo tsopano Tg ya PCB yopanda lead nthawi zambiri imakhala pamwamba pa 150 ° C.
2. PCB yophika iyenera kugwiritsidwa ntchito posachedwa. Ngati sichinagwiritsidwe ntchito, chiyenera kupakidwa vacuum mwamsanga. Ngati akumana ndi msonkhano kwa nthawi yayitali, ayenera kuphikidwanso.
3. Kumbukirani kukhazikitsa zida zowumitsa mpweya wabwino mu uvuni, apo ayi nthunziyo imakhalabe mu uvuni ndikuwonjezera chinyezi chake, chomwe sichili bwino kwa PCB dehumidification.
4. Kuchokera pamawonedwe a khalidwe, makina atsopano a PCB akugwiritsidwa ntchito, ubwino wake udzakhala wabwino. Ngakhale PCB yotha ntchito ikagwiritsidwa ntchito mukaphika, pali chiopsezo china.
Malangizo kwa PCB kuphika
1. Ndi bwino kugwiritsa ntchito kutentha kwa 105±5℃ kuphika PCB. Chifukwa kuwira kwa madzi ndi 100 ℃, bola ngati apitilira kuwira kwake, madziwo amakhala nthunzi. Chifukwa PCB ilibe mamolekyu amadzi ochulukirapo, safuna kutentha kwambiri kuti iwonjezere kuchuluka kwa vaporization yake.
Ngati kutentha kuli kokwera kwambiri kapena kutsika kwa gasification ndikothamanga kwambiri, kungachititse kuti nthunzi yamadzi ifutukuke mofulumira, zomwe kwenikweni sizili zabwino pa khalidweli. Makamaka matabwa a multilayer ndi ma PCB okhala ndi mabowo okwiriridwa, 105 ° C ali pamwamba pa malo otentha amadzi, ndipo kutentha sikudzakhala kokwera kwambiri. , Imatha kuwononga chinyezi ndikuchepetsa chiopsezo cha okosijeni. Komanso, luso la uvuni wamakono wowongolera kutentha kwasintha kwambiri kuposa kale.
2. Kaya PCB ikufunika kuphikidwa zimadalira ngati zoikamo zake ndi zonyowa, ndiko kuti, kuyang'ana ngati HIC (Humidity Indicator Card) mu phukusi la vacuum yasonyeza chinyezi. Ngati kulongedza kwake kuli bwino, HIC sikuwonetsa kuti chinyezicho chilidi Mutha kupita pa intaneti osaphika.
3. Ndi bwino kugwiritsa ntchito "wowongoka" ndi spaced kuphika pamene PCB kuphika, chifukwa akhoza kukwaniritsa pazipita zotsatira za kutentha mpweya convection, ndi chinyezi mosavuta kuwotcha PCB. Komabe, kwa ma PCB akulu akulu, pangakhale kofunikira kulingalira ngati mtundu woyimirira ungayambitse kupindika ndi kupindika kwa bolodi.
4. PCB ikaphikidwa, tikulimbikitsidwa kuti tiyike pamalo owuma ndikulola kuti izizire mwachangu. Ndi bwino kukanikiza "anti-bending fixture" pamwamba pa bolodi, chifukwa chinthu chonsecho ndi chosavuta kuyamwa nthunzi wamadzi kuchokera kumalo otentha kwambiri kupita kumalo ozizira. Komabe, kuzizira kofulumira kungayambitse kupindika kwa mbale, zomwe zimafuna kukhazikika.
Kuipa kwa PCB kuphika ndi zinthu zofunika kuziganizira
1. Kuphika kudzafulumizitsa makutidwe ndi okosijeni a PCB pamwamba ❖ kuyanika, ndi kutentha kwapamwamba, ndi nthawi yophika, ndizovuta kwambiri.
2. Sitikulimbikitsidwa kuphika matabwa opangidwa ndi OSP pamwamba pa kutentha kwakukulu, chifukwa filimu ya OSP idzasokoneza kapena kulephera chifukwa cha kutentha kwakukulu. Ngati mukuyenera kuphika, tikulimbikitsidwa kuti tiphike kutentha kwa 105 ± 5 ° C, osapitirira maola awiri, ndipo tikulimbikitsidwa kuti tigwiritse ntchito mkati mwa maola 24 mutatha kuphika.
3. Kuphika kungakhudze mapangidwe a IMC, makamaka kwa HASL (malata kutsitsi), ImSn (mankhwala malata, kumizidwa malata plating) pamwamba mankhwala matabwa, chifukwa IMC wosanjikiza (mkuwa tin pawiri) kwenikweni oyambirira PCB. siteji Generation, ndiye kuti, wakhala kwaiye pamaso PCB soldering, koma kuphika adzawonjezera makulidwe a wosanjikiza IMC kuti wakhala kwaiye, kuchititsa mavuto kudalirika.