Conductive hole Via hole inozivikanwawo sekuti via hole.Kuti isangane nezvinodiwa nevatengi, bhodhi redunhu kuburikidza negomba rinofanira kuvharwa.Mushure mekuita kwakawanda, iyo yechinyakare aluminium sheet plugging process inoshandurwa, uye redunhu bhodhi repamusoro solder mask uye plugging inopedzwa nechena mesh.gomba.Kugadzirwa kwakagadzikana uye hutano hwakavimbika.
Via hole inoita basa rekubatanidza uye conduction yemasekete.Kuvandudzwa kweindasitiri yemagetsi kunosimudzirawo kusimukira kwePCB, uye zvakare kunoisa pamberi pepamusoro zvinodiwa pane yakadhindwa bhodhi yekugadzira maitiro uye pamusoro pegomo tekinoroji.Via hole plugging tekinoroji yakavapo, uye inofanirwa kuita zvinotevera zvinodiwa panguva imwe chete:
(1) Pane mhangura mugomba, uye solder mask inogona kubatidzwa kana kusabatanidzwa;
(2) Panofanira kuva nerata nemutobvu muburi rekuburikidza neburi, paine humwe hukobvu hunodiwa (4 microns), uye hapana inki yemasiki inotengeswa inofanira kupinda mugomba, zvichiita kuti marata avigwe mugomba;
(3) Gomba rinopfuura nepaburi rinofanirwa kunge riine solder mask plug gomba, rakajeka, uye harifanirwe kunge riine mhete dzerata, marata, uye flatness zvinodiwa.
Nekuvandudzwa kwezvigadzirwa zvemagetsi munzira ye "chiedza, chitete, chipfupi, uye chidiki", maPCB akagadzirawo kusvika pakuwanda uye kuoma kwakanyanya.Naizvozvo, nhamba huru yeSMT neBGA PCBs yakaonekwa, uye vatengi vanoda plugging kana vachiisa zvinhu, kunyanya kusanganisira Mabasa mashanu:
(1) Dzivirira tin kuti risapfuura nepakati pechikamu chepamusoro kuburikidza neburi kuti ikonzere kupfupika kana PCB inotengeswa;kunyanya patinoisa Via pamusoro BGA Pedhi, tinofanira kutanga kuita chivharo gomba uye ipapo goridhe-yakapfatwa kuti kufambisa ari BGA soldering.
(2) Dzivisa kuyerera kwasara mumaburi;
(3) Mushure mekusimudzwa kwepamusoro kwefekitori yemagetsi uye kuunganidzwa kwezvikamu kwapera, PCB inofanirwa kuvharwa kuti iite kudzvanyirira kwakashata pamushini wekuyedza kuti upedze:
(4) Dzivirira pamusoro pe solder paste kuti isayerera ichipinda mugomba, zvichikonzera manyepo soldering uye kukanganisa kuiswa;
(5) Dzivirira mabhora emarata kuti asabude panguva yekutenderedzwa kwemafungu, zvichikonzera mapfupi maseketi.
Kuzadzikiswa kweConductive Hole Plugging process
Pamapuranga epamusoro, kunyanya kukwidzwa kweBGA neIC, plug yeburi rinofanirwa kunge rakati sandara, rakatendereka uye rakakomberedzwa plus kana kubvisa 1mil, uye hapafanirwe kunge paine tin dzvuku kumucheto kwegomba;iyo via hole inovanza bhora rerata, kuti isvike kune mutengi Zvinoenderana nezvinodiwa, iyo kuburikidza negomba plugging process inogona kutsanangurwa seyakasiyana, kuyerera kwemaitiro kunonyanya kureba, kudzora maitiro kwakaoma, uye mafuta anowanzo kudonha panguva. iyo inopisa mhepo yekuyera uye iyo yakasvibira mafuta solder resistance test;matambudziko akadai sekuputika kwemafuta mushure mekusimba kuitika.Zvino zvichienderana nemamiriro chaiwo ekugadzirwa, akasiyana plugging maitiro ePCB anopfupikiswa, uye kumwe kuenzanisa uye tsananguro dzinoitwa mukuita uye zvakanakira nekuipira:
Cherechedza: Nheyo yekushanda yekupisa kwemhepo ndeye kushandisa mhepo inopisa kubvisa solder yakawandisa kubva pamusoro uye maburi ebhodhi redunhu rakadhindwa, uye imwe solder yakasara yakavharwa zvakaenzana pamapadhi, mitsara isingadziviriri solder uye nzvimbo dzekuisa pamusoro, iyo ndiyo nzira yekurapa pamusoro peiyo yakadhindwa redunhu bhodhi imwe.
1. Hole plugging process mushure mekupisa kwemhepo
Maitiro ekuyerera ndeaya: bhodhi pamusoro solder mask →HAL → plug gomba → kurapa.Iyo isiri-plugging process inogamuchirwa kugadzirwa.Mushure mekunge mhepo inopisa yaiswa, iyo aluminium sheet sheet kana inki yekuvhara skrini inoshandiswa kupedzisa kuburikidza negomba plugging inodiwa nemutengi kune ese nhare.Iyo plug hole ingi inogona kuve photosensitive inki kana thermosetting inki.Muchiitiko chekuve nechokwadi chemuvara wakafanana wefirimu yakanyorova, iyo plug hole inki inonyanya kushandisa inki yakafanana nepamusoro pebhodhi.Iyi nzira inogona kuve nechokwadi kuti iyo kuburikidza nemakomba haizorasikirwe nemafuta mushure mekunge mhepo inopisa yaiswa, asi zviri nyore kuita kuti ingi yekuvharisa isvibise bhodhi pamusoro uye isina kuenzana.Vatengi vanowanzoita manyepo soldering (kunyanya muBGA) panguva yekukwira.Saka vatengi vazhinji havabvumi nzira iyi.
2. Mhepo inopisa yekuyera nzira yegomba repamberi replug
2.1 Shandisa aluminium sheet kubaya gomba, kuomesa, uye kupukuta bhodhi kuendesa mifananidzo.
Iyi tekinoroji maitiro anoshandisa muchina wekuchera manhamba kuburitsa pepa realuminium rinoda kubatirwa kugadzira skrini, uye plug maburi kuona kuti kuburikidza negomba plugging yazara.Iyo plug hole inki inogona zvakare kushandiswa ne thermosetting inki.Hunhu hwayo hunofanirwa kunge hwakakwirira mukuoma., Iyo shrinkage yeresin idiki, uye simba rekubatanidza rine rusvingo rwegomba rakanaka.Maitiro ekuyerera ndeaya: pre-kurapwa → plug gomba → kukuya ndiro → kufambisa patani → etching → bhodhi pamusoro solder mask
Iyi nzira inokwanisa kuona kuti plug yeburi repaburi rakati sandara, uye hapazove nematambudziko emhando sekuputika kweoiri uye kudonha kweoiri pamucheto wegomba kana uchienzanisa nemhepo inopisa.Zvakadaro, kuita uku kunoda kukora kamwe chete kwemhangura kuita kuti ukobvu hwemhangura hwemadziro egomba huenderane nechiyero chemutengi.Naizvozvo, zvinodikanwa zvekuputira mhangura pabhodhi rose zvakakwirira kwazvo, uye kushanda kwemuchina wekukuya ndiro zvakare wakakwira zvakanyanya, kuve nechokwadi kuti resin pamusoro pemhangura yabviswa zvachose, uye nzvimbo yemhangura yakachena uye haina kusvibiswa. .Mafekitari mazhinji ePCB haana nguva imwe chete yekukora mhangura, uye kushanda kwemidziyo hakuzadzise zvinodiwa, zvichikonzera kusanyanya kushandiswa kweichi chiitiko mumafekitari ePCB.
2.2 Mushure mekubaya gomba nearuminiyamu sheet, zvakananga skrini-dhinda bhodhi repamusoro solder mask
Maitiro aya anoshandisa CNC drilling muchina kuburitsa kunze pepa realuminium rinoda kubatirwa kugadzira skrini, kuriisa pamushini wekudhinda wescreen kuti uvhare gomba, uye worimisa kweasingapfuure maminetsi makumi matatu mushure mekunge plugging yapera, uye shandisa 36T skrini kuti utarise zvakananga pamusoro pebhodhi.Iyo nzira inoyerera ndeye: pre-kurapa-plug gomba-sirika skrini-pre-kubika-kuratidzwa-kusimudzira-kurapa.
Iyi nzira inogona kuona kuti iyo via gomba yakafukidzwa nemafuta, gomba replug rakati sandara, uye ruvara rwefirimu rakanyorova rinoenderana.Mushure mekunge mhepo inopisa yaiswa, inogona kuve nechokwadi kuti iyo kuburikidza negomba haina kuvharwa uye tin bead haina kuvanzwa mugomba, asi zviri nyore kukonzera inki mugomba mushure mekurapa.Iwo mapedhi ekutengesa anokonzera kushomeka kwekutengesa;mushure mekunge mhepo inopisa yagadziriswa, micheto yevias bubble uye kurasikirwa nemafuta.Zvakaoma kushandisa maitiro aya kudzora kugadzirwa, uye zvinodikanwa kuti mainjiniya ekugadzirisa ashandise maitiro akakosha uye ma parameter kuti ave nechokwadi chemhando yemaburi eplug.
2.3 Iyo aluminium sheet inobairwa mumakomba, yakagadziridzwa, isati yapora, uye yakakwenenzverwa, uye ipapo solder mask inoitwa pamusoro.
Shandisa CNC yekuchera muchina kuburitsa kunze pepa realuminium rinoda kuvhara maburi kuti ugadzire skrini, woiisa pamushini wekudhinda chidzitiro chekuvhara maburi.Maburi ekuvharisa anofanirwa kunge akazara uye akabuda kumativi ese, uye oomesa nekukuya bhodhi kuitira kurapwa kwepamusoro.Iyo nzira inoyerera ndeye: pre-kurapa-plug gomba-pre-kubika-budiriro-pre-curing-board pamusoro solder mask.
Nekuti maitiro aya anoshandisa plug hole kurapa kuti ive nechokwadi chekuti iyo kuburikidza negomba hairasikirwe nemafuta kana kuputika mushure meHAL, asi mushure meHAL, zvinonetsa kugadzirisa zvachose dambudziko rekuchengetera tin bead muburi uye tin paburi repaburi, saka. vatengi vazhinji havazvigamuchire.
2.4 Iyo solder mask uye plug gomba zvinopedzwa panguva imwe chete.
Iyi nzira inoshandisa 36T (43T) chidzitiro, chakaiswa pachiratidziro muchina wekudhinda, uchishandisa padhi kana mubhedha wezvipikiri, uye kana wapedza bhodhi repamusoro, maburi ese anovharwa.Iyo nzira inoyerera ndeye: pretreatment-screen printing- -Pre-baking-exposure-development-curing.
Iyo nguva yekuita ipfupi uye mwero wekushandiswa kwemidziyo wakakwira.Inogona kuve nechokwadi kuti iyo nemaburi haizorasikirwe nemafuta mushure mekupisa kwemhepo, uye nemaburi haazobatirwe.Nekudaro, nekuda kwekushandiswa kwesiriki sikirini yekuvharisa maburi, kune huwandu hukuru hwemhepo mukati kuburikidza nemakomba., Mhepo inowedzera uye inotyora nepakati pe solder mask, zvichikonzera makomba uye kusaenzana.Pachava nekamwe kadiki kuburikidza nemakomba akavanzwa mumhepo inopisa kuenzana.Parizvino, mushure mehuwandu hukuru hwekuedza, kambani yedu yakasarudza marudzi akasiyana einki uye viscosity, yakagadzirisa kudzvanywa kweiyo skrini inodhinda, nezvimwewo, uye yakagadzirisa zvakanyanya kuvharika uye kusaenzana kweiyo vias, uye yakatora nzira iyi yehuwandu. production.