Via hole inozivikanwawo sekuti via hole.Kuti isangane nezvinodiwa nevatengi, iyo
bhodhi redunhu kuburikidza neburi inofanira kuvharwa.Mushure mekuita kwakawanda, iyo yechinyakare aluminium plug hole process yakashandurwa, uye redunhu bhodhi repamusoro solder mask uye plug zvinopedzwa nechena mesh.gomba.Kugadzirwa kwakagadzikana uye hutano hwakavimbika.
Via maburi kuita basa rekubatanidza uye kuitisa mitsetse.Kuvandudzwa kweindasitiri yemagetsi kunosimudzirawo kusimukira kwePCBs, uye zvakare kunoisa kumberi kwepamusoro zvinodiwa zveakadhindwa bhodhi kugadzira tekinoroji uye yepamusoro gomo tekinoroji.Via hole plugging tekinoroji yakatanga, uye zvinotevera zvinodikanwa zvinofanirwa kusangana panguva imwe chete:
(1) Pane mhangura chete mugomba, uye mask ye solder inogona kuvharwa kana kwete;
(2) Panofanira kuva nerata nemutobvu muburi repaburi, nehumwe hukobvu hunodiwa (4 microns), uye hapana solder resist inki inofanira kupinda mugomba, zvichiita kuti marata avigwe mugomba;
(3) Iwo maburi anofanira kunge aine solder resist inki plug maburi, opaque, uye haifanirwe kunge iine madenderedzwa emarata, marata, uye zvinodiwa pakuyera.
Sei PCB wedunhu mabhodhi achida kuvhara vias?
Nekuvandudzwa kwezvigadzirwa zvemagetsi munzira ye "chiedza, chitete, chipfupi uye chidiki", maPCB ari kusimukirawo akananga kune yakakwira density uye yakanyanya kuoma.Naizvozvo, nhamba huru yeSMT neBGA PCBs yakaonekwa, uye vatengi vanoda maburi eplug kana vachiisa zvinhu, kunyanya kusanganisira Mabasa mashanu:
(1) Dzivirira tini kubva pakupinda nepakati pechikamu chepamusoro kuburikidza neburi kukonzeresa pfupi pfupi kana PCB inopfuura nepamhepo solder;kunyanya patinoisa Via buri pamusoro BGA Pedhi, tinofanira kutanga kuita plug gomba, uye ipapo goridhe-yakapfatwa kuti kufambisa BGA soldering.
(2) Dzivisa kuyerera kwakasara muburi repaburi;
(3) Mushure mekunge gomo repamusoro uye chikamu chechikamu chefekitori yemagetsi chapedzwa, PCB inofanirwa kuvharwa pamushini wekuyedza kuti iite kudzvanywa kwakashata isati yapera:
(4) Dzivirira pasi solder paste kubva pakuyerera mugomba kukonzeresa welding, iyo inokanganisa kukwira;
(5) Dzivirira mabedhi emarata kuti asabude mukati meave soldering, zvichikonzera kupfupika.
Kuzadzikiswa kweConductive Hole Plugging Technology
Pamapuranga epamusoro, kunyanya ekukwira kweBGA neIC, maburi anofanirwa kunge akati sandarara, aine convex uye concave plus kana minus 1 mil, uye hapafanirwe kunge paine tin dzvuku kumucheto kwegomba;matinji akavigwa mugomba, kuitira kuti uwane kugutsikana kwevatengi Zvinodiwa zvepaburi plugging process zvinogona kurondedzerwa seyakasiyana, kuyerera kwemaitiro kunonyanya kureba, uye kudzora maitiro kwakaoma.Panowanzova nezvinetso zvakadai sokurasikirwa kwemafuta panguva yekupisa kwemhepo uye girini mafuta solder resistance experiments;kuputika kwemafuta mushure mekurapa.Zvino zvichienderana nemamiriro chaiwo ekugadzira, akasiyana plug hole maitiro ePCB anopfupikiswa, uye kumwe kuenzanisa uye tsananguro dzinoitwa mukuita, zvakanakira uye zvisingabatsiri:
Cherechedza: Nheyo yekushanda kwemhepo inopisa ndeyekushandisa mhepo inopisa kubvisa solder yakawandisa pamusoro pebhodhi redunhu rakadhindwa uye mumakomba, uye solder yakasara yakavharwa zvakaenzana pamapadhi, mitsara isina-resistance solder uye pamusoro. kurongedza mapoinzi, inova nzira yekurapa pamusoro peiyo yakadhindwa redunhu bhodhi.Poshi.
1. Plug hole process mushure mekupisa kwemhepo
Maitiro ekuyerera ndeaya: bhodhi pamusoro solder mask → HAL → plug gomba → kurapa.Iyo isiri-plugging process inoshandiswa pakugadzira.Mushure mekunge mhepo inopisa yaiswa, iyo aluminium skrini kana inki yekuvhara skrini inoshandiswa kupedzisa kuburikidza negomba plugging yenhare dzese dzinodiwa nemutengi.Iyo yekuvharisa inki inogona kuve photosensitive inki kana thermosetting inki.Muchiitiko chekuve nechokwadi chemuvara wakafanana wefirimu yakanyorova, iyo plugging inki inonyanya kushandisa inki yakafanana nepamusoro pebhodhi.Iyi nzira inogona kuona kuti iyo kuburikidza negomba haidonhedze mafuta mushure mekunge mhepo inopisa yaiswa, asi zviri nyore kuita kuti ingi ye plug hole isvibise bhodhi uye kusaenzana.Zviri nyore kuti vatengi vakonzerese solder (kunyanya muBGA) kana uchikwira.Saka vatengi vazhinji havabvumi nzira iyi.
2. Plug hole process isati yapisa mhepo yakaenzana
2.1 Shandisa aluminium sheet kuvhara maburi, kurapa, uye kukuya ndiro yekufambisa patani
Mukuita uku, muchina wekuchera weCNC unoshandiswa kuburitsa pepa realuminium rinoda kubatirwa, kugadzira ndiro yescreen, uye kubaya maburi kuona kuti maburi azara, uye ingi yekuvharisa inoshandiswa kubaya buri. ., resin shrinkage shanduko idiki, uye simba rekubatanidza rine rusvingo rwegomba rakanaka.Kuyerera kwacho ndekwe: pretreatment → plug gomba → grinding plate → kufambisa patani → etching → board surface solder mask
Iyi nzira inogona kuita kuti iyo via hole plug gomba yakati sandara, uye kupisa kwemhepo kukwirisa hakuzove nematambudziko emhando sekuputika kwemafuta uye kurasikirwa kweoiri pamucheto wegomba, asi kuita uku kunoda kukora kwemhangura. iyo mhangura yemhangura yegomba rusvingo inogona kusangana nechiyero chemutengi.Naizvozvo, zvinodikanwa zvekuputira mhangura pandiro yese zvakakwirira kwazvo, uye kune zvakare zvinodikanwa zvakakwirira zvekushanda kwemuchina wekukuya kuti ive nechokwadi chekuti resin pamusoro pemhangura yabviswa zvachose, uye nzvimbo yemhangura yakachena uye isina kubva. kusvibiswa.Mafekitari mazhinji ePCB haana nguva imwe chete yekukora mhangura, uye kushanda kwemidziyo hakuzadzise zvinodiwa, zvichikonzera kuti maitiro aya asashandiswe zvakanyanya mumafekitori ePCB.
2.2 Mushure mekuvhara maburi nemashizha ealuminium, tarisa zvakananga mask inotengeswa pabhodhi pamusoro.
Mukuita uku, muchina wekuchera weCNC unoshandiswa kuburitsa pepa realuminium rinoda kubatirwa kugadzira chidzitiro cheplate, chinoiswa pamushini wekudhinda chidzitiro cheplugging.Mushure mekunge plugging yapera, haifanirwe kumiswa kweanopfuura maminetsi makumi matatu.Iyo nzira inoyerera ndeye: pretreatment - plug gomba - sirika skrini - pre-kubika - kuratidzwa - kuvandudza - kurapa
Iyi nzira inogona kuve nechokwadi kuti iyo kuburikidza negomba yakafukidzwa nemafuta, gomba repulagi rakati sandara, uye ruvara rwefirimu rakanyorova rakafanana.Mapedhi, zvichiita kuti murombo solderability;mushure mekupisa kwemhepo, mupendero wepaburi mabhubhu nemafuta anobviswa.Zvakaoma kudzora kugadzirwa uchishandisa iyi nzira, uye injinjiniya inofanirwa kutora matanho akakosha uye paramita kuti ive nechokwadi chemhando ye plug gomba.
Sei PCB wedunhu mabhodhi achida kuvhara vias?
2.3 Mushure mekunge pepa realuminium ravhara maburi, kukura, kusati kwapora, uye kukuya bhodhi, nzvimbo yebhodhi inotengeswa.
Shandisa CNC drilling muchina kudhirowa pepa realuminium rinoda maburi eplug, gadzira chidzitiro cheplate, uye woiisa pamushini wekudhinda chidzitiro chemaburi.Maburi eplug anofanira kunge akazara, uye mativi ese ari maviri ari nani akabuda.Iyo nzira inoyerera ndeye: pre-kurapwa - plug gomba - pre-kubika - kusimudzira - pre-kurapa - bhodhi pamusoro solder mask
Nekuti maitiro aya anotora plug-gomba kurapa kuti ive nechokwadi chekuti iyo kuburikidza negomba haizorasikirwe nemafuta kana kuputika mafuta mushure meHAL, asi mushure meHAL, zvakaoma kugadzirisa zvachose dambudziko retin bead muburi uye tin paburi. saka vatengi vazhinji havazvigamuchire.
2.4 Iyo solder mask pamusoro pebhodhi uye gomba replug rinopedzwa panguva imwe chete.
Iyi nzira inoshandisa 36T (43T) skrini mesh, iyo inoiswa pamushini wekudhinda skrini, uchishandisa ndiro yekudzosera kana mubhedha wechipikiri, uye kubaya ese nemaburi uchipedzisa bhodhi.Iyo nzira inoyerera ndeye: pretreatment--screen kudhinda--Pre-bake--Exposure--Development--Cure
Iyi nzira ine nguva pfupi uye yakanyanya kushandiswa kwemidziyo, iyo inogona kuona kuti kuburikidza nemakomba haizorasikirwe nemafuta uye nemaburi haazovharwa mushure mekupisa kwemhepo., Mhepo inowedzera uye inoputika nepakati pe solder mask, ichikonzera voids uye kusaenzana.Pachave nekashoma kemaburi akavigwa mumarata panguva yekupisa kwemhepo.Parizvino, kambani yedu yakagadzirisa gomba uye kusaenzana kwegomba mushure mekuedza kwakawanda, kusarudza marudzi akasiyana einki uye viscosity, kugadzirisa kudzvanywa kwesiriki skrini yekudhinda, nezvimwewo, uye maitiro aya akagamuchirwa kugadzirwa kwakawanda. .
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