Kudzivirira maburi muplating uye welding kunosanganisira kuyedza maitiro matsva ekugadzira uye kuongorora mhedzisiro. Plating uye welding voids kazhinji ane zvinozivikanwa zvikonzero, senge mhando solder paste kana drill bit inoshandiswa mukugadzira maitiro. Vagadziri vePCB vanogona kushandisa akati wandei nzira dzakakosha kuona uye kugadzirisa zvakajairika zvinokonzeresa izvi voids.
1.Kugadzirisa reflux tembiricha curve
Imwe yenzira dzekudzivirira welding cavities kugadzirisa iyo yakakosha nzvimbo ye reflux curve. Kupa matanho akasiyana enguva kunogona kuwedzera kana kuderedza mukana wekuumba voids. Kunzwisisa yakanakira kudzoka curve maitiro kwakakosha pakubudirira kudzivirira mhango.
Kutanga, tarisa maSettings azvino enguva yekudziya-up. Edza kuwedzera tembiricha yekupisa kana kuwedzera nguva yekupisa yereflux curve. Solder maburi anogona kuumbwa nekuda kwekushaikwa kwekupisa munzvimbo yekupisa, saka shandisa nzira idzi kugadzirisa chikonzero.
Homogeneous kupisa nzvimbo dzinowanzo konzeresa mune welded voids. Nguva pfupi yekunyura inogona kusatendera zvese zvikamu uye nzvimbo dzebhodhi kusvika kune inodiwa tembiricha. Edza kubvumira imwe nguva yekuwedzera kune ino nzvimbo ye reflux curve.
2.Shandisa zvishoma flux
Yakawandisa flux inogona kuwedzera uye kazhinji inotungamira kune welding. Rimwe dambudziko negomba rakabatana: flux degassing. Kana iyo flux isina nguva yakakwana ye degass, yakawandisa gasi ichabatwa uye isina chinhu ichaumbwa.
Kana yakawandisa flux ikaiswa kuPCB, nguva inodiwa kuti iyo flux ibviswe zvachose inowedzerwa. Kunze kwekunge iwe wawedzera imwe nguva yekubvisa, imwe flux inozokonzera weld voids.
Nepo kuwedzera yakawanda degassing nguva inogona kugadzirisa dambudziko iri, zvinonyanya kushanda kunamatira kune huwandu hwekuyerera hunodiwa. Izvi zvinochengetedza simba uye zviwanikwa uye zvinoita kuti majoini ave akachena.
3.Shandisa zviboore zvinopinza chete
Chikonzero chinowanzokonzera makomba eplating urombo kuburikidza nekuchera maburi. Mabhiti akagomara kana kusaita zvakanaka kuchera kunogona kuwedzera mukana wekuumbwa kwemarara panguva yekuchera. Kana zvimedu izvi zvakanamatira kuPCB, zvinogadzira nzvimbo dzisina chinhu dzisingagone kuputirwa nemhangura. Izvi zvinokanganisa conductivity, kunaka uye kuvimbika.
Vagadziri vanogona kugadzirisa dambudziko iri nekushandisa chete mabheti akapinza uye akapinza. Gadzira hurongwa hunoenderana hwekurodza kana kutsiva zvibooro, senge kota. Uku kugadzirisa nguva dzose kunovimbisa kuenderana kuburikidza-gomba kuchera kunaka uye kuderedza mukana wemarara.
4.Edza maitiro akasiyana e template
Iyo template dhizaini inoshandiswa mune reflow process inogona kubatsira kana kutadzisa kudzivirira kwe welded voids. Nehurombo, hapana imwe-saizi-inokodzera-yese mhinduro kune template dhizaini sarudzo. Mamwe madhizaini anoshanda zvirinani neakasiyana solder paste, flux, kana PCB mhando. Zvinogona kutora kumwe kuedza uye kukanganisa kuwana sarudzo yeimwe bhodhi mhando.
Kubudirira kuwana iyo chaiyo template dhizaini inoda yakanaka yekuyedza maitiro. Vagadziri vanofanirwa kutsvaga nzira yekuyera uye kuongorora mhedzisiro yeformwork dhizaini pane voids.
Nzira yakavimbika yekuita izvi kugadzira batch yePCBS ine chaiyo template dhizaini uye wobva wanyatsoiongorora. Matemplate akati wandei anoshandiswa kuita izvi. Ongororo yacho inofanirwa kuratidza kuti ndeapi magadzirirwo emafomu ane avhareji yenhamba yemaburi ekutengesa.
Chishandiso chakakosha muchirongwa chekuongorora ndeye X-ray muchina. X-rays ndiyo imwe yenzira dzekutsvaga welded voids uye inonyanya kubatsira kana uchibata nediki, yakasimba yakazara PCBS. Kuve nemuchina wakakodzera weX-ray kuchaita kuti maitiro ekuongorora ave nyore uye anoshanda zvakanyanya.
5.Reduced drilling rate
Pamusoro pekupinza kweiyo bhiti, kumhanya kwekuchera kuchavawo nekukanganisa kukuru pamhando yeplating. Kana iyo bhiti kumhanya yakanyanya kukwira, inoderedza kurongeka uye kuwedzera mukana wekuumbwa kwemarara. Kumhanya kwepamusoro kwekuchera kunogona kutowedzera njodzi yekuputsika kwePCB, kutyisidzira kutendeseka kwechimiro.
Kana maburi ari mujasi achiri akajairika mushure mekurodza kana kushandura bhiti, edza kudzikisa mwero wekuchera. Kunonoka kunononoka kunobvumira nguva yakawanda kuumba, kuchenesa kuburikidza nemakomba.
Ramba uchifunga kuti nzira dzechinyakare dzekugadzira haisi sarudzo nhasi. Kana kushanda zvakanaka kuri kutariswa mukutyaira mitengo yakakwira yekuchera, kudhinda kwe3D kungave sarudzo yakanaka. 3D yakadhindwa PCBS inogadzirwa zvine hunyanzvi kupfuura nzira dzechinyakare, asi nekururama kwakafanana kana kwepamusoro. Kusarudza PCB yakadhindwa ye3D kungasada kuchera nemumakomba zvachose.
6.Namira kumhando yepamusoro solder paste
Zviri muropa kutsvaga nzira dzekuchengetedza mari muPCB kugadzira maitiro. Nehurombo, kutenga zvakachipa kana zvemhando yepamusoro solder paste zvinogona kuwedzera mukana wekugadzira weld voids.
Izvo zvemakemikari emhando dzakasiyana dze solder paste zvinokanganisa mashandiro avo uye mabatiro avanoita nePCB panguva yereflux process. Semuenzaniso, kushandisa solder paste isina mutobvu inogona kupera panguva yekutonhodza.
Kusarudza yemhando yepamusoro solder paste inoda kuti iwe unzwisise zvinodiwa nePCB uye template inoshandiswa. Yakakora solder paste ichave yakaoma kupinza template ine diki aperture.
Zvinogona kubatsira kuyedza akasiyana solder paste panguva imwe chete yekuyedza akasiyana matemplate. Kusimbiswa kunoiswa pakushandisa mutemo webhora-shanu kugadzirisa saizi ye template aperture kuitira kuti solder paste ienderane netemplate. Mutemo unoti vagadziri vachashandisa formwork ine maapertures anodiwa kuti akwane mashanu solder paste mabhora. Iyi pfungwa inorerutsa maitiro ekugadzira akasiyana paste template magadzirirwo ekuyedza.
7.Reduce solder paste oxidation
Oxidation ye solder paste inowanzoitika kana paine mhepo yakawandisa kana unyoro munzvimbo yekugadzira. Oxidation pachayo inowedzera mukana wekuumbwa kwevoids, uye zvakare inoratidza kuti yakawandisa mweya kana hunyoro inowedzera njodzi yevoids. Kugadzirisa uye kuderedza oxidation kunobatsira kudzivirira voids kubva pakuumba uye kunatsiridza PCB mhando.
Kutanga tarisa mhando ye solder paste yakashandiswa. Mvura-soluble solder paste inonyanya kutarisana neoxidation. Mukuwedzera, kusakwana kwekuyerera kunowedzera njodzi ye oxidation. Ehe, yakawandisa flux zvakare idambudziko, saka vagadziri vanofanirwa kuwana chiyero. Nekudaro, kana oxidation ikaitika, kuwedzera huwandu hwekuyerera kunowanzo kugadzirisa dambudziko.
Vagadziri vePCB vanogona kutora matanho akawanda ekudzivirira makomba ekuputira uye ekushivirira pane zvigadzirwa zvemagetsi. Voids inokanganisa kuvimbika, kuita uye kunaka. Sezvineiwo, kuderedza mukana wekuumba voids kwakapusa sekushandura solder paste kana kushandisa dhizaini nyowani.
Uchishandisa bvunzo-cheki-yekuongorora nzira, chero mugadziri anogona kuwana uye kugadzirisa iyo midzi inokonzeresa voids mune reflux uye plating maitiro.
