PCB multilayer compaction ndi njira yotsatizana. Izi zikutanthauza kuti m'munsi mwa layering adzakhala chidutswa cha mkuwa zojambulazo ndi wosanjikiza prepreg anaika pamwamba. Chiwerengero cha zigawo za prepreg zimasiyanasiyana malinga ndi ntchito zofunika. Kuphatikiza apo, chigawo chamkati chimayikidwa pa prepreg billet wosanjikiza kenako ndikudzazidwa ndi prepreg billet wosanjikiza wokutidwa ndi zojambula zamkuwa. Laminate ya multilayer PCB imapangidwa motero. Ikani laminates ofanana pamwamba pa mzake. Pambuyo powonjezeredwa chojambula chomaliza, mulu womaliza umapangidwa, wotchedwa "buku," ndipo mulu uliwonse umatchedwa "mutu."
Bukuli likamaliza, limasamutsidwa ku makina osindikizira a hydraulic. Makina osindikizira a hydraulic amatenthedwa ndipo amagwiritsa ntchito mphamvu zambiri ndikupukuta bukhuli. Njirayi imatchedwa kuchiritsa chifukwa imalepheretsa kulumikizana pakati pa laminates ndi mzake ndipo imalola kuti utomoni wa prepreg ugwirizane ndi pachimake ndi zojambulazo. Zigawozi zimachotsedwa ndikuzizidwa kutentha kuti zilole kuti utomoni ukhazikike, motero amamaliza kupanga copper multilayer PCB kupanga.
Mapepala amitundu yosiyanasiyana akadulidwa molingana ndi kukula kwake, kuchuluka kwa mapepala kumasankhidwa molingana ndi makulidwe a pepala kuti apange slab, ndipo slab laminated imasonkhanitsidwa mugawo lokakamiza malinga ndi dongosolo lazofunikira. . Kanikizani makina osindikizira mu makina opangira laminate kuti akanikizire ndi kupanga.
5 magawo a kutentha kutentha
(a) Preheating siteji: kutentha kumachokera ku firiji kupita ku kutentha koyambirira kwa machiritso a pamwamba, pomwe utomoni wapakati umatenthedwa, gawo la volatile limatulutsidwa, ndipo kupanikizika ndi 1/3 mpaka 1/2 ya kukakamizidwa kwathunthu.
(b) kutchinjiriza siteji: pamwamba wosanjikiza utomoni anachiritsidwa pa mlingo wotsika anachita. Pakatikati utomoni wosanjikiza ndi uniformly kutenthedwa ndi kusungunuka, ndipo mawonekedwe a utomoni wosanjikiza akuyamba kusakanikirana wina ndi mzake.
(c) Kutentha siteji: kuyambira kutentha koyambira kuchiritsa mpaka kutentha kwakukulu komwe kumatchulidwa panthawi ya kukanikiza, kuthamanga kwa kutentha sikuyenera kukhala kofulumira kwambiri, apo ayi kuthamanga kwapamwamba kwapamwamba kudzakhala kofulumira kwambiri, ndipo sikungathe kuphatikizidwa bwino ndi utomoni wapakati, zomwe zimapangitsa kuti stratification kapena kusweka kwa chinthu chomalizidwa.
(d) nthawi zonse kutentha siteji: pamene kutentha kufika pamtengo wapatali kwambiri kukhalabe siteji zonse, udindo wa siteji iyi ndi kuonetsetsa kuti pamwamba wosanjikiza utomoni wachiritsidwa, pachimake wosanjikiza utomoni ndi uniformly plasticized, ndi kuonetsetsa kusungunuka. kuphatikiza pakati pa zigawo za mapepala zakuthupi, pansi pa zochita za kukakamizidwa kuti apange yunifolomu wandiweyani lonse, ndiyeno yomalizidwa ntchito mankhwala kukwaniritsa mtengo wabwino kwambiri.
(e) Chigawo chozizirira: Pamene utomoni wapakati pa slab wachiritsidwa bwino ndikuphatikizidwa bwino ndi utomoni wapakati, ukhoza kuzizidwa ndi kuzizidwa, ndipo njira yoziziritsira ndikudutsa madzi ozizira mu mbale yotentha. atolankhani, omwe amathanso utakhazikika mwachibadwa. Gawoli liyenera kuchitidwa pansi pa kukonzanso kwa mphamvu yomwe yatchulidwa, ndipo kuzizira koyenera kumayenera kuyendetsedwa. Pamene kutentha kwa mbale kumatsika pansi pa kutentha koyenera, kumasulidwa kwamphamvu kungathe kuchitika.
Nthawi yotumiza: Mar-07-2024
