Conductive hole Via hole inozivikanwawo sekuti via hole.Kuti isangane nezvinodiwa nevatengi, bhodhi redunhu kuburikidza negomba rinofanira kuvharwa.Mushure mekuita kwakawanda, iyo yechinyakare aluminium 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 kuitisa mitsetse.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 yakatanga, uye inofanirwa kuita zvinotevera zvinodiwa:
(1) Mugomba mune mhangura chete, uye mask ye solder inogona kubaiwa kana kusabatanidzwa;
(2) Panofanira kuva nerata nemutobvu muburi repaburi, paine humwe hukobvu hunodiwa (4 microns), uye hapana inki yemasiki inotengeswa inofanira kupinda mugomba, zvichiita kuti mabhindauko emarata mugomba;
(3) Iwo kuburikidza nemaburi anofanira kunge aine solder mask inki plug maburi, opaque, uye haifanirwe kunge iine mhete dzerata, marata mabhedhi, uye flatness zvinodiwa.
Nekuvandudzwa kwezvigadzirwa zvemagetsi mugwara re "chiedza, chitete, chipfupi uye chidiki", maPCB akagadzirawo kusvika pakuwanda uye kuoma kwakanyanya.Naizvozvo, nhamba huru yeSMT neBGA PCBs yakaonekwa, uye vatengi vanoda plugging kana uchiisa zvinhu, kunyanya Mabasa mashanu:
(1) Dzivirira pfupi dunhu rinokonzerwa nerata richipfuura nepakati pechikamu kubva paburi kana PCB inotengeswa;kunyanya kana isu akaisa Via buri 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 mabedhi emarata kuti asabude panguva yekutenderedzwa kwemasaisai, zvichikonzera masekete mapfupi.
Kuzadzikiswa kwe conductive hole plugging process
Pamapuranga epamusoro, kunyanya BGA uye IC inokwirisa, iyo via hole plugs inofanira kunge yakati sandara, convex uye concave plus kana minus 1mil, uye hapafanirwe kunge paine tin dzvuku kumucheto kweburi;iyo via hole inovanza bhora rerata, kuitira kuti isvike kune vatengi Maitiro eku plugging nemaburi anogona kutsanangurwa seakasiyana.Kuyerera kwemaitiro kunonyanya kureba uye kutonga kwemaitiro kwakaoma.Panowanzova nezvinetso zvakadai sekudonha kwemafuta panguva yekupisa kwemhepo uye girini mafuta solder resistance experiments;kuputika kwemafuta mushure mekurapa.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. Plugging process mushure mekupisa kwemhepo
Maitiro ekuyerera ndeaya: bhodhi pamusoro solder mask →HAL → plug gomba → kurapa.Non-plugging process inogamuchirwa kugadzirwa.Mushure mekupisa kwemhepo kuyera, aluminium sheet sheet kana inki yekuvhara skrini inoshandiswa kupedzisa kuburikidza negomba plugging inodiwa nevatengi kune ese nhare.Iyo yekuvharisa inki inogona kuve photosensitive inki kana thermosetting inki.Muchiitiko chekuvimbisa ruvara rwakafanana rwefirimu yakanyorova, zvakanakisisa 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 ye plug hole isvibise bhodhi pamusoro uye kusaenzana.Vatengi vanowanzoita manyepo soldering (kunyanya muBGA) panguva yekukwira.Saka vatengi vazhinji havabvumi nzira iyi.
2. Kupisa kwemhepo kuyera uye plugging process
2.1 Shandisa aluminium sheet kubaya gomba, kuomesa, uye kukwenenzvera bhodhi kuitira kutamisa mifananidzo
Iyi tekinoroji maitiro anoshandisa CNC yekuchera muchina kuburitsa kunze pepa realuminium rinoda kubatirwa kugadzira skrini, uye kubaya buri kuti ive nechokwadi chekuti via buri rakazara.Iyo plug hole inki inogonawo kushandiswa ne thermosetting inki, uye maitiro ayo anofanira kunge akasimba., 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 inogona kuona kuti plug yegomba repaburi rakati sandara, uye hapazove nematambudziko emhando sekuputika kweoiri uye kudonha kwemafuta pamucheto wegomba panguva yekupisa kwemhepo.Zvakadaro, kuita uku kunoda kukora kwenguva imwe chete kwemhangura kuita kuti ukobvu hwemhangura hwemadziro egomba huenderane nechiyero chemutengi.Naizvozvo, zvinodikanwa zvekuputira mhangura yeplate yese zvakakwirira kwazvo, uye kushanda kwemushini wekukuya ndiro zvakare wakakwira zvakanyanya, kuve nechokwadi kuti resin iri 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
Kuita uku kunoshandisa CNC drilling muchina kuburitsa kunze pepa realuminium rinoda kubatirwa kugadzira skrini, kuriisa pachiratidziro muchina wekudhinda weplugging, uye woimisa kweasingapfuure maminetsi makumi matatu wapedza kupura, uye shandisa 36T. skrini yekutarisa zvakananga pamusoro pebhodhi.Iyo nzira inoyerera ndeye: pretreatment-plug hole-silk screen-pre-baking-exposure-development-curing.
Iyi nzira inogona kuona kuti iyo via gomba yakafukidzwa nemafuta, gomba repuragi rakati sandara, uye ruvara rwefirimu rwakanyorova runowirirana.Mushure mekunge mhepo inopisa yakarongedzwa, inogona kuve nechokwadi kuti iyo via gomba haina kuvharwa, uye gomba harivanzi mabheji etini, asi zviri nyore kukonzera inki mugomba mushure mekurapa Mapedhi ekutengesa anokonzera kushata solderability;mushure mekunge mhepo inopisa yagadziriswa, micheto yevias inoputika uye mafuta anobviswa.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 mugomba, yakagadziridzwa, isati yapora, uye yakakwenenzverwa, uye ipapo iyo solder mask inoitwa.
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-kuvandudza-pre-curing-board pamusoro solder mask.Nekuti maitiro aya anoshandisa plug hole kupora kuti ive nechokwadi chekuti iyo kuburikidza negomba haidonhe kana kuputika mushure meHAL, asi mushure meHAL, maTin bead akavigwa mukati nemaburi nemarata paburi nemaburi anonetsa kugadzirisa zvachose, saka vatengi vazhinji havaagamuchire.
2.4 Iyo bhodhi yepamusoro solder mask uye plug gomba zvinopedzwa panguva imwe chete.
Iyi nzira inoshandisa 36T (43T) chidzitiro, chakaiswa pachiratidziro chekudhinda muchina, uchishandisa ndiro yekudzosera kana chipikiri mubhedha, uchipedzisa bhodhi repamusoro, vhara zvese nemaburi, maitiro ekuyerera ndea: pretreatment-silk screen- -Pre- kubika-exposure-development-curing.Iyo nguva yekuita ipfupi, uye chiyero chekushandisa chemidziyo chakakwira.Inogona kuva nechokwadi chokuti kuburikidza nemakomba haazorasikirwi nemafuta uye kuburikidza nemakomba haazoiti tinned mushure mokunge mhepo inopisa yaiswa, asi nokuti sirika sikirini inoshandiswa plugging , Pane yakawanda yemhepo mu vias.Munguva yekurapa, mhepo inowedzera uye inopwanya nepakati peiyo solder mask, ichikonzera mhango uye kusaenzana.Pachave nechidimbu chemarata nemumaburi ekugadzirisa mhepo inopisa.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.