Bowo loyendetsa Via hole limadziwikanso kuti kudzera pa dzenje.Kuti mukwaniritse zofuna za makasitomala, bolodi lozungulira kudzera pa dzenje liyenera kulumikizidwa.Pambuyo pochita zambiri, njira yolumikizira pepala ya aluminiyamu imasinthidwa, ndipo chigoba cha solder board ndi plugging chimamalizidwa ndi mauna oyera.dzenje.Kupanga kokhazikika ndi khalidwe lodalirika.

Via hole imagwira ntchito yolumikizirana komanso kuyendetsa mabwalo.Kukula kwa makampani opanga zamagetsi kumalimbikitsanso chitukuko cha PCB, komanso kumapereka zofunikira pakupanga makina osindikizira komanso ukadaulo wapamwamba.Kudzera pa hole plugging teknoloji inayamba, ndipo iyenera kukwaniritsa zofunikira izi nthawi imodzi:

(1) Pali mkuwa mu dzenje, ndipo chigoba cha solder chimatha kulumikizidwa kapena kusalumikizidwa;

(2) Payenera kukhala malata ndi lead mu dzenje, ndi zina makulidwe chofunika (4 microns), ndipo palibe solder chigoba inki ayenera kulowa dzenje, kuchititsa malata kubisika dzenje;

(3) Bowo lodutsapo liyenera kukhala ndi dzenje la pulagi ya solder, lowoneka bwino, ndipo lisakhale ndi mphete za malata, mikanda ya malata, ndi zofunikira za flatness.

Ndi chitukuko cha zinthu zamagetsi zomwe zimayang'ana "zopepuka, zoonda, zazifupi, ndi zazing'ono", ma PCB nawonso ayamba kukhala ovuta kwambiri komanso ovuta kwambiri.Chifukwa chake, ma SMT ambiri ndi ma PCB a BGA awonekera, ndipo makasitomala amafunikira plugging pakuyika zida, makamaka kuphatikiza ntchito Zisanu:

(1) Pewani malata kuti asadutse chigawocho kudzera pabowo kuti apangitse kagawo kakang'ono pamene PCB imagulitsidwa;makamaka pamene ife kuika kudzera pa BGA PAD, choyamba tiyenera kupanga pulagi dzenje ndiyeno golide-yokutidwa kuti atsogolere BGA soldering.

(2) Pewani zotsalira zotsalira pamabowo;

(3) Pambuyo kukwera pamwamba pa fakitale yamagetsi ndi kusonkhanitsa zigawozo kumalizidwa, PCB iyenera kutsekedwa kuti ipange kupanikizika koipa pamakina oyesera kuti amalize:

(4) Pewani phala la solder kuti lisalowe mu dzenje, zomwe zimapangitsa kuti zikhale zabodza komanso kusokoneza kuyika;

(5) Pewani mipira ya malata kuti isatuluke panthawi yowotchera mafunde, zomwe zimapangitsa kuti mabwalo azifupi.

Kuzindikira kwa Conductive Hole Plugging process

Pa matabwa okwera pamwamba, makamaka kuyika kwa BGA ndi IC, pulagi yodutsa dzenje iyenera kukhala yosalala, yopingasa ndi yopingasa kuphatikiza kapena kuchotsera 1mil, ndipo pasakhale malata ofiira m'mphepete mwa dzenje;The via hole amabisa mpira malata, kuti afikire kasitomala Malinga ndi zofunika, kudzera dzenje plugging ndondomeko akhoza kufotokozedwa kuti zosiyanasiyana, ndondomeko kuyenda makamaka yaitali, kuwongolera ndondomeko n'kovuta, ndipo mafuta nthawi zambiri amatsitsidwa kutentha kwa mpweya ndi kuyesa kukana mafuta obiriwira;mavuto monga kuphulika kwa mafuta pambuyo pokhazikika.Tsopano malingana ndi momwe zinthu zilili pakupanga, njira zosiyanasiyana zolumikizira PCB zimafotokozeredwa mwachidule, ndipo mafananidwe ena ndi mafotokozedwe amapangidwa munjira ndi zabwino ndi zoyipa:

Zindikirani: Mfundo yogwiritsira ntchito mpweya wotentha ndikugwiritsa ntchito mpweya wotentha kuchotsa solder yochuluka kuchokera pamwamba ndi mabowo a bolodi losindikizidwa, ndipo solder yotsalayo imakutidwa mofanana pamapadi, mizere yosakanizika ya solder ndi malo oyika pamwamba, amene ali pamwamba mankhwala njira ya kusindikizidwa dera bolodi mmodzi.

1. Njira yolumikizira dzenje mutatha kutentha kwa mpweya
Mayendedwe ake ndi: board surface solder mask→HAL→bowo lapulagi→kuchiritsa.Njira yopanda plug imatengedwa kuti ipangidwe.Mpweya wotentha ukatha, chotchinga cha aluminiyamu kapena chotchinga chotchinga cha inki chimagwiritsidwa ntchito kumalizitsa pobowola pamabowo ofunikira ndi kasitomala pazolinga zonse.Inki ya bowo la pulagi ikhoza kukhala inki yowoneka bwino kapena inki ya thermosetting.Pankhani ya kuonetsetsa mtundu womwewo wa chonyowa filimu, pulagi dzenje inki ndi bwino ntchito inki yemweyo monga bolodi pamwamba.Mchitidwewu ukhoza kuonetsetsa kuti podutsa mabowo sangataye mafuta pambuyo poti mpweya wotentha wasinthidwa, koma n'zosavuta kuchititsa kuti inki yotsekera iwononge bolodi komanso yosagwirizana.Makasitomala sachedwa soldering zabodza (makamaka BGA) pa okwera.Choncho makasitomala ambiri savomereza njira imeneyi.

2. Kutentha kwa mpweya wotentha wa dzenje la pulagi kutsogolo

2.1 Gwiritsani ntchito pepala la aluminiyamu kuti mutseke dzenje, kulimbitsa, ndi kupukuta bolodi kuti musamutse zojambulazo.

Njira yaukadauloyi imagwiritsa ntchito makina obowola manambala pobowola pepala la aluminiyamu lomwe likufunika kulumikizidwa kuti lipange chinsalu, ndikumanga mabowowo kuti zitsimikizire kuti pobowoyo yadzaza.Inki ya bowo ya pulagi itha kugwiritsidwanso ntchito ndi inki ya thermosetting.Makhalidwe ake ayenera kukhala olimba kwambiri., Kuchepa kwa utomoni ndi kochepa, ndipo mphamvu yogwirizanitsa ndi khoma la dzenje ndi yabwino.Kuthamanga kwa ndondomekoyi ndi: chithandizo chisanachitike → dzenje la pulagi → mbale yopera → kutengerapo chitsanzo → etching → chigoba cha board surface solder

Njirayi imatha kuwonetsetsa kuti dzenje la pulagi la dzenjelo ndi lathyathyathya, ndipo sipadzakhala mavuto abwino monga kuphulika kwa mafuta ndi kutsika kwa mafuta m'mphepete mwa dzenje pamene mukuyenda ndi mpweya wotentha.Komabe, njirayi imafuna kukhuthala kamodzi kwa mkuwa kuti makulidwe amkuwa a khoma la dzenje akwaniritse muyezo wa kasitomala.Choncho, zofunikira zopangira mkuwa pa bolodi lonse ndizokwera kwambiri, ndipo ntchito ya makina opangira mbale ndipamwamba kwambiri, kuonetsetsa kuti utomoni pamtunda wamkuwa umachotsedwa, ndipo pamwamba pa mkuwa ndi woyera komanso wosaipitsidwa. .Mafakitale ambiri a PCB alibe nthawi imodzi yokulitsa mkuwa, ndipo magwiridwe antchito a zida sizimakwaniritsa zofunikira, zomwe zimapangitsa kuti ntchitoyi isagwiritsidwe ntchito kwambiri m'mafakitale a PCB.

2.2 Mukatha kulumikiza dzenje ndi pepala la aluminiyamu, sindikizani chigoba cha bolodi pamwamba pa solder

Njirayi imagwiritsa ntchito makina obowola a CNC pobowola pepala la aluminiyamu lomwe likufunika kulumikizidwa kuti lipange chophimba, kuyiyika pamakina osindikizira kuti atseke dzenjelo, ndikuyiyimitsa osapitilira mphindi 30 plugging ikamalizidwa, ndikugwiritsa ntchito chophimba cha 36T kuti muwonetse mwachindunji pamwamba pa bolodi.Njira yomwe imayendera ndi: pre-atreatment-plug hole-silk screen-pre-baking-exposure-development-curing

Njirayi imatha kuwonetsetsa kuti dzenje limakutidwa bwino ndi mafuta, dzenje la pulagi ndi lathyathyathya, ndipo mtundu wa filimu yonyowa ndi wofanana.Mpweya wotentha ukatha kuwongoleredwa, umatha kuwonetsetsa kuti pobowoyo sungamangidwe ndipo mkanda wa malata usabisike mbowo, koma ndikosavuta kuyambitsa inki mu dzenje pambuyo pochiritsa.Mapadi otsekemera amachititsa kuti pakhale kusungunuka bwino;mpweya wotentha utatha, m'mphepete mwa vias kuwira ndikutaya mafuta.Ndikovuta kugwiritsa ntchito njirayi kuwongolera kupanga, ndipo ndikofunikira kuti akatswiri opanga ma process agwiritse ntchito njira zapadera ndi magawo kuti atsimikizire mtundu wa mabowo a pulagi.

2.3 Tsamba la aluminiyamu limakulungidwa m'mabowo, opangidwa, ochiritsidwa kale, ndi opukutidwa, kenako chigoba cha solder chimapangidwa pamwamba.

Gwiritsani ntchito makina obowola a CNC kuti mubowole pepala la aluminiyamu lomwe limafunikira mabowo otsekera kuti mupange chinsalu, kuyiyika pa makina osindikizira a shift screen pobowola mabowo.Mabowo otsekera ayenera kukhala odzaza ndi kutuluka mbali zonse, ndiyeno kulimbitsa ndikupera bolodi kuti athandizidwe pamwamba.Mayendedwe ake ndi: pre-achiza-plug hole-pre-baking-development-pre-curing-board surface solder mask

Chifukwa njirayi imagwiritsa ntchito machiritso a plug hole kuonetsetsa kuti pobowo sikutaya mafuta kapena kuphulika pambuyo pa HAL, koma pambuyo pa HAL, zimakhala zovuta kuthetsa vuto lakusungirako mikanda ya malata mu dzenje ndi malata pa dzenje, kotero makasitomala ambiri savomereza.

2.4 Chigoba cha solder ndi dzenje la pulagi zimamalizidwa nthawi imodzi.

Njirayi imagwiritsa ntchito chophimba cha 36T (43T), chomwe chimayikidwa pamakina osindikizira, pogwiritsa ntchito pad kapena bedi la misomali, ndipo pomaliza bolodi, mabowo onse amatsekedwa.Mayendedwe ake ndi: pretreatment-screen printing- -Pre-baking-exposure-development-curing.

Nthawi yogwirira ntchito ndi yaifupi ndipo kugwiritsa ntchito zida ndipamwamba.Itha kuwonetsetsa kuti mabowo sataya mafuta pambuyo poti mpweya wotentha uwonjezeke, ndipo mabowowo asakayikidwe.Komabe, chifukwa chogwiritsa ntchito chophimba cha silika potsekera mabowo, pali mpweya wambiri pamabowowo., Mpweya umatambasuka ndikuswa chigoba cha solder, zomwe zimapangitsa kuti pakhale ming'alu ndi kusagwirizana.Padzakhala pang'ono kudzera mabowo zobisika mu otentha mpweya kusanja.Pakali pano, pambuyo ambiri zatsopano, kampani yathu wasankha mitundu yosiyanasiyana ya inki ndi mamasukidwe akayendedwe, kusintha kuthamanga kwa chophimba kusindikiza, etc., ndipo makamaka anathetsa voids ndi kusamvana kwa vias, ndipo watengera ndondomekoyi kwa misa. kupanga.