Chimayambitsa kudza ndi kugwa anatsimikiza ndi maonekedwe a zinthu. Pofuna kuthana ndi vuto la shrinkage wa Sizisuntha-Ololera PCB Board , tiyeni mawu oyamba achidule ndi nkhani ya mbale Polyimide kusintha:
(1) polyimide ali kwambiri matenthedwe ntchito, chingathe kupirira mantha matenthedwe wa kutsogolera-free soldering kutentha mankhwala;
(2) zipangizo ambiri opanga amakonda kugwiritsa ntchito kusintha madera gulu zipangizo yaing'ono kuti tikusowa kukhomerera chizindikiro wokhulupirika;
(3) Polyimide ali mkulu galasi kusintha kutentha ndi mkulu makhalidwe limatsogolera mfundo,
bwinobwino zinthu kukonzedwa pa 350 ℃ kapena zambiri;
(4) Mu kuvunda organic, polyimide ndi insoluble solvents wamba organic.
Kusintha mbale chuma mmwamba ndi pansi ndi waukulu tsinde zinthu PI ndi zomatira ali pa banja, ndiye ubale waukulu ndi imidation wa PI, ndi apamwamba mlingo wa imidization, mphamvu za controllability.
Malinga ndi malamulo yachibadwa kupanga pambuyo kusintha bolodi kudulana, mapangidwe mzere zithunzi, ndi mitundu okhwima ndi zofewa mu ndondomeko ya psinjika adzakhala ndi osiyana kukula ndi chidule mu zithunzi mzere etching, mzere mwamphamvu ndi malangizo , zidzapangitsa kuti reorientation za maganizo a gulu lonse, ndi kudzabadwira lamulo ambiri a komiti mmwamba ndi pansi kusintha; mu ndondomeko ya kaphatikizidwe zofewa ndi zovuta, monga pamwamba kuphimba filimu ndi m'munsi zinthu koyefishienti PI kuwonjezeka losemphana, Mu kuchuluka kwa pamlingo winawake kukula.
Kuchokera chifukwa chikhalidwe, umachuluka chuma ndipo anakhudzidwa ndi kutentha ndipo chifukwa cha zazitali PCB kupanga ndondomeko, chuma pambuyo ambiri otentha ndondomeko yonyowa, apamwamba shrinkage mtengo akhoza kukhala madigiri osiyanasiyana kusintha wochenjera, koma yaitali ya leni kupanga zambiri, kusintha kapena wokhazikika.
Kulamulira ndi kusintha?
Kwenikweni, maganizo a mkati mwa aliyense mpukutu wa chuma ndi osiyana, ndi ndondomeko kulamulira lililonse mtanda mbale sadzakhala chimodzimodzi. Choncho, ulamuliro wa koyefishienti cha kuwonjezedwa nkhani zachokera ambiri komanso zapansi Pa kulamulira ndondomeko ndi deta zowerengera kusanthula n'kofunika kwambiri. Ntchito lenileni la shrinkage wa mbale kusintha lagawidwa magawo:
The choyamba ndi ku kutsegula kwa pepala kuphika, siteji Izi makamaka oyambitsidwa ndi zotsatira kutentha:
Kuonetsetsa kuti mbale kuphika chifukwa ndi kugwa wosasunthika, woyamba pokonza ulamuliro kugwirizana, pansi pa chiyembekezo cha zinthu wogwirizana wina Kutentha kuphika mbale ndi yozizira ntchito mogwirizana, osati mwachimbulimbuli titsatire dzuwa, ndi kuika yomalizidwa mbale mu mlengalenga kutentha madyaidya ndikuledzera. Njira yokhayo kuchepetsa nkhawa mkati chifukwa cha kuwonjezeka zakuthupi ndi chidule.
The chachiwiri gawo zinachitika mu ndondomeko ya kusintha chitsanzo. The shrinkage wa gawo lino makamaka chifukwa cha kusintha kwa maganizo lathu m'nkhaniyo.
Pofuna kutsimikiza kuti ndondomeko mzere kutengerapo ndi wolimba, mapepala onse kuphika sakanakhoza kukhala kukukuta, mwachindunji kupyolera mankhwala kuyeretsa mzere pamwamba Pre-chithandizo, pambuyo kuthamanga Kakhungu pamwamba ayenera kuchulutsa kutali, gulu pamwamba pamaso ndipo pambuyo nthawi kukhudzana ayenera kokwanira , pambuyo kulanda mpikisanowu chifukwa cha kusintha kwa maganizo lathu, kusintha mbale udzaonetsera digiri osiyanasiyana crimp ndi chidule, motero filimu malipilo ulamuliro ubale wa mzere ku zovuta ndi yofewa osakaniza ndi mwatsatanetsatane kulamulira, pa nthawi yomweyo, mbale ukuwonjezeka kugawa ascertainment a osiyanasiyana mfundo ndi kupanga mothandiza deta okhwima gulu maziko ake.
The wachitatu gawo la chidule kumachitika mu ndondomeko zovuta ndi yofewa gulu atolankhani, waukulu psinjika magawo ndi katundu zinthu nthawi imeneyi atsimikiziridwa.
Zinthu kumamukopa imeneyi cha kuwonjezedwa monga mlingo Kutentha kwa lamination, kuika magawo kuthamanga, ndi mlingo yotsalira mkuwa ndi makulidwe a pakati. Ambiri, ang'onoang'ono ndi yotsalira ndalama mkuwa, wamkulu mtengo shrinkage; ndi n'kakang'ono pachimake kwambiri, mtengo wa kudza ndi kugwa. Komabe, kuchokera chachikulu ang'ono, sikuchitika, kotero filimu malipilo kwambiri. Komanso, chifukwa chikhalidwe cha bolodi kugawa gulu kukhwimitsa chuma, malipilo ake ndi mfundo ina imene ayenera kuonedwa.