PCBA maitiro: PCBA=Yakadhindwa Circuit Board Assembly, kureva kuti, iyo isina chinhu PCB board inopfuura nepakati SMT chikamu chepamusoro, uye yobva yapfuura nepakati pemaitiro ese eDIP plug-in, inonzi PCBA process.
Process uye Technology
Jigsaw join:
1. V-CUT kuwirirana: kushandisa splitter kuti iparadzanise, iyi nzira yekuparadzanisa ine mutsara wakatsetseka uye hauna migumisiro yakaipa pane zvinotevera.
2. Shandisa pinhole (stamp hole) yekubatanidza: Zvakakosha kufunga nezve burr mushure mekuputsika, uye kana zvichizokanganisa kushanda kwakagadzikana kwekugadzirisa paBonding machine muCOB process.Inofanirwawo kutariswa kuti ichakanganisa plug-in track uye kuti ichakanganisa gungano here.
PCB zvinhu:
1. MaPCB eCardboard akadai seXXXP, FR2, uye FR3 anokanganisa zvakanyanya nekupisa.Nekuda kwekusiyana kwemafuta ekuwedzera coefficients, zviri nyore kukonzera blistering, deformation, kuputsika, uye kudurura kweganda remhangura paPCB.
2. Girazi fiber board maPCB akadai seG10, G11, FR4, uye FR5 haanyanyi kukanganiswa neSMT tembiricha uye tembiricha yeCOB neTHT.
Kana anopfuura maviri COB.SMT.THT maitiro ekugadzira anodiwa pane imwe PCB, tichifunga zvese mhando uye mutengo, FR4 yakakodzera kune akawanda zvigadzirwa.
Iko pesvedzero ye wiring ye pad yekubatanidza mutsara uye chinzvimbo cheiyo kuburikidza negomba pane iyo SMT kugadzirwa:
Iyo wiring ye pad yekubatanidza mitsara uye chinzvimbo chekuburikidza nemakomba ine simba guru pane inotengeswa goho reSMT, nekuti isina kukodzera padhi yekubatanidza mitsara uye kuburikidza nemakomba inogona kuita basa re "kuba" solder, inonwisa mvura solder muhovhoni reflow Go ( siphon uye capillary chiito mumvura).Mamiriro anotevera akanakira kugadzirwa kwemhando:
1. Deredza hupamhi hwepadhi yekubatanidza mutsara:
Kana pasina muganho weazvino kutakura kutakura uye PCB yekugadzira saizi, iyo yakakura hupamhi hwepadhi yekubatanidza mutsara ndeye 0.4mm kana 1/2 pad padhi, inogona kuve idiki.
2. Zvinonyanya kudiwa kushandisa mitsetse yakamanikana yekubatanidza nehurefu husingasviki 0.5mm (hupamhi husingapfuuri 0.4mm kana hupamhi husingapfuuri 1/2 yehupamhi hwepadhi) pakati pemapedhi akabatanidzwa kune yakakura-nzvimbo conductive mitsetse ( senge ndege dzepasi, ndege dzemagetsi).
3. Dzivisa kubatanidza waya kubva parutivi kana kona kupinda padhi.Kunyanya zvinonyanya kunaka, waya yekubatanidza inopinda kubva pakati pekumashure kwepadhi.
4. Kuburikidza nemakomba kunofanira kudziviswa zvakanyanya sezvinobvira mumapadhi ezvikamu zve SMT kana zvakananga pedyo nemapadhi.
Chikonzero ndechekuti: iyo kuburikidza neburi mupedhi inokwezva iyo solder mugomba uye kuita kuti solder isiye solder joint;gomba rakananga padhuze nepadhi, kunyangwe paine yakanaka girinhi yekudzivirira kwemafuta (mukugadzirwa chaiko, iyo yakasvibira mafuta kudhinda muPCB inopinda zvinhu haina kururama Muzviitiko zvakawanda), inogonawo kukonzera kupisa kunyura, izvo zvichachinja kukurumidza kupinza kwemajoini ekutengesa, kukonzeresa chiitiko che tombstone muzvikamu zve chip, uye kutadzisa kuumbwa kwakajairwa kwemajoini anotengeswa mumatambudziko akaomarara.
Kubatana pakati pegomba uye padhi inonyanya kuda tambo yakatetepa yekubatanidza ine kureba isingasviki 0.5mm (hupamhi husingapfuuri 0.4mm kana hupamhi husingapfuuri 1/2 yehupamhi hwepadhi).
Nguva yekutumira: Feb-22-2023