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 kunge paine tin-lead muburi repaburi, ine chimwe chinodiwa ukobvu (4 microns), uye hapana solder mask inki inofanira kupinda mugomba, zvichikonzera marata 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 kwakasara muvias;
(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.

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, 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.

I. Hole plugging process mushure mekupisa kwemhepo

Maitiro ekuyerera ndeaya: bhodhi pamusoro solder mask →HAL → plug gomba → kurapa. Iyo isiri-plugging process inogamuchirwa kugadzirwa. Mushure memhepo inopisa yaiswa, iyo aluminium sheet sheet kana inki yekuvhara skrini inoshandiswa kupedzisa kuburikidza negomba plugging inodiwa nemutengi 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.

II. Mhepo inopisa yekuisa pamberi peplug hole process

1. Shandisa bepa realuminium kubaya buri, kuomesa, uye kukwenenzvera bhodhi kuitira kutamisa patani
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 ye resin idiki, uye simba rekubatanidza negomba remadziro 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 kwemuchina wekugaya ndiro zvakare kwakakwira 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. Shandisa aluminium sheet kuvhara gomba uye zvakananga sikirini dhinda bhodhi pamusoro 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: 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 inobviswa. Zvakaoma kudzora kugadzirwa nenzira iyi. Iwo mainjiniya ekuita anofanirwa kushandisa maitiro akakosha uye ma parameter kuti ave nechokwadi chemhando yemaburi eplug.

3. Pepa realuminium rinobairwa mugomba, rakagadzirwa, rakagara raporeswa, uye rinokwenenzverwa pamberi pemask solder.
Shandisa CNC yekuchera muchina kuburitsa kunze pepa realuminium rinoda kuvhara maburi kuti ugadzire skrini, woiisa pamushini wekudhinda chidzitiro chekuvhara maburi. Maburi ekuvharisa anofanira kunge akazara uye akabuda kumativi ese. Mushure mekuporeswa, bhodhi racho rinoitwa pasi pekurapa kwepamusoro. Iyo nzira inoyerera ndeye: pre-kurapwa-plug gomba-pre-baking-budiriro-pre-curing-board surface solder resist. Nekuti maitiro aya anoshandisa plug hole kurapa kuona kuti iyo kuburikidza negomba mushure meHAL haidonhe kana kuputika, asi mushure meHAL, Zvakaoma kugadzirisa zvachose dambudziko remarata mabhedhi akavanzwa mukati nemaburi uye tin paburi nemaburi, saka vatengi vazhinji vanoita. usazvigamuchira.

4. board surface solder mask uye plug gole 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 kuburikidza nemakomba ekugadzirisa mhepo inopisa. Parizvino, mushure mekuedza kwenhamba yakawanda, kambani yedu yakasarudza marudzi akasiyana einki uye viscosity, yakagadzirisa kudzvanywa kwechidzitiro chekudhinda, nezvimwewo, uye yakagadzirisa gomba uye kusaenzana kweiyo vias, uye yakatora nzira iyi yehuwandu. production.