Via Maitiro muMultilayer PCB Kugadzirwa

Vias ndechimwe chezvinhu zvakakosha zveMultilayer PCB kugadzirwa, uye mari yekuchera inowanzoita 30% kusvika 40% yemutengo wePCB muenzaniso.The via hole igomba rakaboorwa pacopper clad laminate.Inotakura conduction pakati pematanho uye inoshandiswa pakubatanidza magetsi uye kugadzirisa kwemidziyo.ring.

Kubva pakuita multilayer PCB yekugadzira, vias zvakakamurwa kuita zvikamu zvitatu, zvinoti, makomba, makomba akavigwa uye kuburikidza nemakomba.Mune multilayer PCB kugadzirwa uye kugadzirwa, zvakajairika kuburikidza nemaitiro anosanganisira kuburikidza nemafuta ekuvhara, kuburikidza nemafuta eplug, kuburikidza nekuvhura hwindo, resin plug gomba, electroplating gomba kuzadza, nezvimwe. Imwe neimwe nzira ine maitiro ayo.

1. Kuburikidza nemafuta ekuvhara

Iwo "mafuta" evhavha yevhavha anoreva solder mask mafuta, uye iyo kuburikidza negomba yekuvhara mafuta ndeyekuvharira mhete yegomba neingi ye solder mask.Chinangwa chemafuta evhavha ndechekuisa insulate, saka zvinodikanwa kuve nechokwadi kuti chivharo cheinki chemhete yegomba chakazara uye chakakora zvakakwana, kuitira kuti tini isanamatira pachigamba uye DIP gare gare.Izvo zvinofanirwa kucherechedzwa pano kuti kana iyo faira iri PADS kana Protel, kana yatumirwa kune multilayer PCB yekugadzira fekitori kuburikidza nemafuta ekuvhara, iwe unofanirwa kunyatso tarisa kana iyo plug-in gomba (PAD) inoshandisa kuburikidza, uye kana zvakadaro, yako plug-in gomba ichafukidzwa nemafuta egirini uye haigone kusungirirwa.

2. Via window

Pane imwe nzira yekubata ne "kuburikidza nemafuta ekuvhara" kana iyo via gomba yakavhurwa.Iyo via hole uye grommet haifanirwe kuvharwa ne solder mask mafuta.Kuvhurwa kwegomba kunowedzera nzvimbo yekupisa kupisa, iyo inobatsira pakupisa kupisa.Naizvozvo, kana izvo zvinodikanwa zvekupisa kupisa kwebhodhi zvakakwira, kuvhurwa kwegomba kunogona kusarudzwa.Uyezve, kana uchida kushandisa multimeter kuita kumwe kuyerwa basa pamusoro vias panguva multilayer PCB kugadzirwa, ipapo kuti vias kuvhurika.Nekudaro, kune njodzi yekuvhura iyo kuburikidza negomba - zviri nyore kuita kuti padhi ipfupikiswe kune tini.

3. Via plug mafuta

Via plugging mafuta, kureva, kana iyo multilayer PCB ikagadziriswa uye kugadzirwa, iyo solder mask inki inotanga kubatirwa mukati megomba nepepa realuminium, uyezve solder mask mafuta anodhindwa pabhodhi rese, uye ese nemaburi. haizofambisi chiedza.Chinangwa kuvharira vias kudzivirira maranga mabhedhi kubva kuhwanda mumakomba, nokuti tin mabhedha achayerera kuna Mapedhi kana vakanyungudutswa pakakwirira tembiricha, zvichiita pfupi matunhu, kunyanya pamusoro BGA.Kana iyo vias isina inki yakakodzera, mipendero yemakomba ichatsvuka, inokonzera "kunyepa kuratidzwa kwemhangura" kwakaipa.Uye zvakare, kana iyo kuburikidza negomba plugging mafuta isina kuitwa zvakanaka, inozokanganisawo chitarisiko.

4. Resin plug gomba

Iyo resin plug hole inongoreva kuti mushure megomba madziro akaputirwa nemhangura, iyo kuburikidza negomba inozadzwa ne epoxy resin, uye ipapo mhangura inoputirwa pamusoro.Mhedzisiro yegomba resin plug ndeyekuti panofanirwa kuve nemhangura yekuisa mugomba.Izvi zvinodaro nekuti kushandiswa kweresin plug maburi muPCB kunowanzo shandiswa kune zvikamu zveBGA.Traditional BGA inogona kushandisa kuburikidza pakati PAD uye PAD kufambisa waya kuseri.Nekudaro, kana iyo BGA yakanyanya kukora uye Via haigone kubuda, inogona kucherwa zvakananga kubva kuPAD.Ita Via kune imwe pasi kuenda kunzira tambo.Iyo pamusoro peiyo multilayer PCB yekugadzira neiyo resin plug hole process haina dents, uye maburi anogona kuvhurwa pasina kukanganisa soldering.Naizvozvo, inofarirwa pane zvimwe zvigadzirwa zvine mazinga akakwirira uyemapuranga makobvu.

5. Electroplating uye kuzadza gomba

Electroplating uye kuzadza kunoreva kuti vias izere ne electroplated mhangura panguva multilayer PCB kugadzirwa, uye pasi pegomba rakati sandara, iro risingangobatsiri kugadzirwa kwemakomba akaturikidzana uye.kuburikidza nemapads, asi inobatsirawo kuvandudza kushanda kwemagetsi, kupisa kupisa, uye kuvimbika.