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 kumberi kwepamusoro zvinodiwa pane yakadhindwa bhodhi yekugadzira maitiro uye yepamusoro gomo tekinoroji. Via hole plugging tekinoroji yakatanga, uye inofanirwa kuita zvinotevera zvinodiwa:
(1) Pane mhangura mugomba, uye solder mask inogona kubatidzwa kana kusabatanidzwa;
(2) Panofanira kunge paine tin-lead muburi repaburi, ine humwe hukobvu hunodiwa (4 microns), uye hapana solder mask inki inofanirwa kupinda mugomba, zvichiita kuti marata avigwe 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 vachiisa zvinhu, kunyanya kusanganisira Mabasa mashanu:
(1) Dzivirira pfupi pfupi inokonzerwa netini ichipfuura 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 mumakomba;
(3) Mushure mekuiswa kwepamusoro uye kuungana kwechikamu chefekitori yemagetsi kwapera, PCB inofanirwa kuvharwa kuti iite kumanikidza 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 kwe conductive 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 retini, kuti isvike kune vatengi Zvinoenderana nezvinodiwa, iyo kuburikidza negomba plugging process inogona kutsanangurwa seyakasiyana, maitiro acho akanyanya kureba, maitiro akaoma kudzora, uye mafuta anowanzo kudonhedzwa panguva kupisa kwemhepo kuyera uye iyo yakasvibira mafuta solder resistance test; matambudziko akadai sekuputika kwemafuta mushure mekurapa. Zvinoenderana nemamiriro chaiwo ekugadzirwa, akasiyana plugging maitiro ePCB anopfupikiswa, uye kumwe kuenzanisa uye tsananguro dzinoitwa mukuita uye zvakanakira nekuipira:
Cherechedza: Nheyo yekushanda yemhepo inopisa ndeyekushandisa mhepo inopisa kubvisa yakawandisa solder kubva pamusoro uye maburi ebhodhi redunhu rakadhindwa. Iyo yakasara solder yakavharwa zvakaenzana pamapedhi, isingadzivisiki solder mitsetse uye nzvimbo dzekuisa pamusoro, iyo ndiyo nzira yekurapa yepamusoro yedhidhiyo redunhu bhodhi rimwe.
1. 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 yekuvharisa inki inogona kuve photosensitive inki kana thermosetting inki. Pasi pemamiriro ekuti ruvara rwefirimu yakanyorova inopindirana, iyo plugging 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 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 kunopisa uye teknolojia yekuvhara gomba
2.1 Shandisa aluminium sheet kubaya gomba, kuomesa, uye kukwenenzvera bhodhi kuitira kutamisa mifananidzo
Maitiro aya anoshandisa muchina wekuchera manhamba kuburitsa pepa realuminium rinoda kubatirwa kugadzira skrini, uye vhara 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 → 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 pandiro yese zvakakwirira kwazvo, uye kushanda kwemushini wekugaya ndiro zvakare kwakakwira 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.
1. Plugging process mushure meHot Air Leveling
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 yekuvharisa inki inogona kuve photosensitive inki kana thermosetting inki. Pasi pemamiriro ekuti ruvara rwefirimu yakanyorova inopindirana, iyo plugging 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 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 kunopisa uye teknolojia yekuvhara gomba
2.1 Shandisa aluminium sheet kubaya gomba, kuomesa, uye kukwenenzvera bhodhi kuitira kutamisa mifananidzo
Maitiro aya anoshandisa muchina wekuchera manhamba kuburitsa pepa realuminium rinoda kubatirwa kugadzira skrini, uye vhara 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 nemadziro egomba rakanaka. Maitiro ekuyerera ndeaya: pre-kurapwa → plug gomba → kukuya ndiro → kufambisa patani → etching → 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 pandiro yese zvakakwirira kwazvo, uye kushanda kwemushini wekugaya ndiro zvakare kwakakwira 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 pamushini wekudhinda wescreen kuti uburitse gomba, uye worimisa kweasingapfuure maminetsi makumi matatu wapedza plugging, 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 mokunge mhepo inopisa yakasvibiswa, inogona kuve nechokwadi kuti iyo via gomba haina kusungirirwa uye bheji yetini haina kuvanzwa mugomba, asi zviri nyore kukonzera inki mugomba mushure mekurapa Mapedhi anokonzera kusagadzikana kwekutengesa; mushure mekunge mhepo inopisa yagadziriswa, micheto yevias inoputika uye mafuta inobviswa. Zvakaoma kudzora kugadzirwa nenzira iyi, uye mainjiniya ekuita anofanirwa kushandisa maitiro akasarudzika uye ma parameter kuti ave nechokwadi chemhando yemaburi eplug.
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 pamushini wekudhinda wescreen kuti uburitse gomba, uye worimisa kweasingapfuure maminetsi makumi matatu wapedza plugging, 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 mokunge mhepo inopisa yakasvibiswa, inogona kuve nechokwadi kuti iyo via gomba haina kuvharwa uye bheji yetini haina kuvanzwa mugomba, asi zviri nyore kukonzera inki mugomba mushure mekuporesa Mapedhi anokonzera kusakwanisa solder; mushure mekunge mhepo inopisa yagadziriswa, micheto yevias inoputika uye mafuta inobviswa. Zvakaoma kudzora kugadzirwa nenzira iyi, uye mainjiniya ekuita anofanirwa kushandisa maitiro akasarudzika uye ma parameter kuti ave nechokwadi chemhando yemaburi eplug.