Chii chinonzi mapofu nemavias akavigwa?
Ma-blind vias: Kana divi rimwe chete rema-vias riri muchikamu chekunze chePCB, anonzi ma-blind vias.
Mavhiya akavigwa: Kana mativi ese ari maviri emavhiya akavigwa mukati mePCB, anonzi mavhiya akavigwa.
Mavhiya asingaonekwe uye akavigwa anogadzirwa sei?
Nzira nhatu dzinotevera dzinogona kugadzira ma-via asina kujeka uye akavigwa:
Kuboorera kwemuchina nehupamhi hwakatarwa
Kuchera nekuchera zvakatevedzana
Chero lamination uye kuchera
Chii chinonzi bofu kuburikidza nemaitiro ekugadzira?
Kutanga, tinotaura nezve laser drill blind via holes. PCB blind via design process seinotevera:
1) pedzisa zvikamu zvese zvemukati kutanga;
2) bvisa jira repurasitiki re prepreg ne copper pajira remukati rePCB rakapedzwa;
3) bhobora jira rinodzorwa nechiedza kuburikidza nePCB uchishandisa laser.
Ndapota cherechedzai kuti kunyatsorongeka kwakakosha zvikuru kune vasingaoni kuburikidza ne in pad.
Kana iri nzira yekubvisa maburi emuchina kuburikidza nemaburi, tinotora maPCB ane mativi mana ane maburi emuchina kubva pachikamu 1 kusvika pachikamu 2 semuenzaniso, maitiro acho anotevera:
1) kugadzira zvikamu 1 ne2 sePCB ine zvikamu zviviri, saka pachava nekuboorwa pazvikamu 1 kusvika 2;
2) kubatanidza mabhodhi maviri epakati kuti tiwane PCB ine mativi mana, toboora plating nepakati pemaburi;
3) kana PCB yapera, unowana PTH kubva muzvikamu 1 kusvika 4 uye ma blind vias kubva muzvikamu 1 kusvika 2.
Ndezvipi zvakanakira kushandisa ma-vias asingaonekwe uye akavigwa?
Mabhenefiti ekushandisa pombi isina chinhu uye yakavigwa anotaurwa pazasi:
Kuderedza saizi nehuremu hwePCB
Kuderedza huwandu hwezvikamu
Kuderedza mari yekugadzira mhando dzakasiyana dzePCB kubva pakubatanidza mabasa akawanda
Kuvandudza kuenderana kwemagetsi
Kuwedzera hunhu hwezvigadzirwa zvemagetsi
Kuita kuti dhizaini ishande zviri nyore uye nekukurumidza
Ndezvipi zvinetso zvekushandisa ma-vias asingaonekwe uye akavigwa?
Kuderedzwa kwemadhayamita ema "vias" asina kuvharwa uye akavigwa kunoita kuti kugadzirwa kwePCB kuve kwakanyanya.
Mainjiniya ane ruzivo rwakanyanya anodiwa kuti vagadzire maPCB asingaonekwe uye akavigwa.
Zvakaoma zvikuru kuunganidza maPCB e-vias asingaonekwe uye akavigwa sezvo achigara aine mapedhi madiki, akadai seBGA pads.
Chii chinonzi "bofu" rakajairika kuburikidza ne "aspect ratio"?
Mubhodhi remablind vias rinoshandisa laser drill, chiyero che "blind via aspect ratio" chinowanzo shandiswa pa "blind via" i1:1.
Chii chinovigwa kuburikidza?
Ma-vias akavigwa muPCB anoburitswa nemaburi ari pakati pema-layer emukati. Tinotora blind ine ma-layer matanhatu/yakavigwa kuburikidza necircuit board semuenzaniso: ma-vias akavigwa kuburikidza nemaburi ari kubva pa-layer 2-3, 2-4, 2-5, 3-4, 3-5 uye 4-5.
Kuvigwa kuburikidza vs kusviba kuburikidza
MaPCB eHDI anoshandiswa neBlind via neBlied via, anogara aripo mumabhodhi ecircuit akadhindwa ane tekinoroji yepamusoro panguva imwe chete. Asi iwo marudzi akasiyana zvachose emavias.