In PCB dhizaini, isu tinogara tichitsvaga kuvandudzwa kwehunyanzvi hwekuita kuti basa redu rive nyore, uye kuwana zvimwe zvinobudirira sezvo dhizaini inova diki uye yakaoma. Imwe yekuvandudzwa uku ndeye micropores. Aya Laser-drilled vias idiki pane kwakajairika vias uye vane akasiyana chikamu reshiyo. Nekuda kwehukuru hwavo hudiki, vanorerutsa basa rekutsvaga nzira, vachitibvumira kurongedza waya dzakawanda munzvimbo diki. Heino rumwe ruzivo nezve chikamu cheiyo microvias uye kuti kushandisa microvias kunogona kukubatsira sei nePCB dhizaini yako.

Ongorora PCB kuburikidza nemakomba

Kutanga, ngatitarisei rumwe ruzivo rwekutanga kuburikidza nemaburi uye mashandisirwo awo pamabhodhi edunhu akadhindwa. Kuburikidza nemakomba maburi anoboorwa muPCB. Makomba akapfava anogona kuitisa masaini emagetsi kubva pane imwe nhanho kuenda kune imwe. Sezvinongoita maronda anoitisa masaini akachinjika muPCB, vias anogona zvakare kuitisa aya masaini akamira. Saizi yemaburi inogona kusiyana kubva padiki kusvika kuhombe. Yakakura kuburikidza nemakomba anoshandiswa kune simba uye pasi magiradhi, uye kunyange michina maficha anogona kubatanidzwa kubhodhi. Standard kuburikidza nemakomba anogadzirwa ne mechanical drilling. Vanogona kugoverwa muzvikamu zvitatu:

Kuburikidza negomba: buri rakaboorwa kubva kumusoro kusvika pazasi kusvika kuPCB.

Blind hole: Gomba rakaboorwa kubva pachikamu chekunze kusvika pachikamu chemukati chebhodhi redunhu, pachinzvimbo chekupfuura nemubhodhi redunhu seburi rekupfuura.

Makomba Akavigwa: Makomba anotanga uye anoguma chete pachikamu chemukati chebhodhi. Maburi aya haawedzeri kune chero kunze.

Ukuwo, micro vias vakasiyana mureza vias kuti vari chibooreso ane Laser, izvo zvinoita kuti diki pane kwakajairika drills. Maererano nehupamhi hwebhodhi, iyo mechanical drilling kazhinji haisi pasi pe 0.006 inches (0.15 mm), uye micro-holes inova duku kubva pakukura uku. Mumwe mutsauko nemamicrovias ndewekuti anowanzo tambanudzira mitsara miviri chete, nekuti kuisa mhangura mumakomba madiki aya kunogona kunetsa kune vanogadzira. Kana iwe uchida kubatanidza zvakananga kuburikidza neanopfuura maviri akaturikidzana, unogona kuisa iyo microvias pamwechete.

Iwo ma micropores anotangira kubva pamusoro haafanire kuzadzwa, asi zvichienderana nekushandiswa, zvinhu zvakasiyana zvichashandiswa kuzadza ma micropores akavigwa. Iwo akaturikidzana mamicrovias anowanzo kuzadzwa ne electroplated mhangura kuona kubatana pakati peakaturikidzana vias. Imwe nzira yekubatanidza ma microvias kuburikidza ne layer stacks ndeye kudzikamisa uye nekuabatanidza neapfupi traces. Sezvinoratidzwa mumufananidzo uri pazasi, chimiro cheiyo microvia chakasiyana kubva kune yakajairwa kuburikidza neyakajairwa, zvichikonzera chiyero chakasiyana.

Chii chinonzi Microvia aspect ratio uye nei yakakosha kuPCB dhizaini?

Aspect ratio of the through hole ireshiyo iri pakati pekudzika kwegomba uye dhayamita yegomba (kudzika kwegomba uye dhayamita yegomba). Semuyenzaniso, chiyero chedunhu bhodhi rine ukobvu hwe 0.062 inches uye 0.020 inches kuburikidza nemakomba inofanira kuva ne aspect ratio ye 3:1. Reshiyo iyi inogona kushandiswa segwara rekuona kuti mugadziri haapfuure kugona kwemugadziri. Ivo midziyo yekuchera. Pakuboora kwakajairwa, chiyero chechikamu hachifanirwe kudarika 10:1, izvo zvinobvumira 0.062 inch puranga kubvoora 0.006 inch (0.15 mm) buri mukati maro.

Paunenge uchishandisa micropores, chiyero chechikamu chinosiyana zvakanyanya nekuda kwehukuru hwavo uye kudzika. Zvinogona kunetsa kupinza maburi madiki. Kuedza kuvhara buri diki pachikamu chegumi chebhodhi redunhu kuchakonzera matambudziko mazhinji kune vanogadzira PCB. Nekudaro, kana gomba richitora maviri chete ematanho aya, plating inova nyore. IPC yaishandiswa kutsanangura pores zvichienderana nehukuru hwawo, iyo yakaenzana kana isingasviki 10 inches (0.006 mm). Nekufamba kwenguva, saizi iyi yakave yakajairika, uye IPC yakafunga kushandura tsananguro yayo kuti irege kugara ichivandudza maratidziro ayo sezvo tekinoroji inochinja. IPC ikozvino inotsanangura micropore segomba rine aspect ratio ye0.15:1, chero kudzika kwegomba kusapfuure 1 inches kana 0.010 mm.

Iyo Microvia inobatsira sei kufambisa zviteshi pabhodhi redunhu

Iro zita remutambo muPCB dhizaini nderekuti sezvo kuwanda kwePCB tekinoroji kunowedzera, nzira dzakawanda dzenzira dzinowanikwa munzvimbo diki. Izvi zvakaita kuti kushandiswa kwemapofu vias uye kuvigwa vias, uyewo nzira kuti embedding vias ari pamusoro gomo Mapedhi. Zvisinei, mapofu makomba uye vias akavigwa zvakaoma zvikuru kugadzira nokuda kwokuwedzera kuchera matanho anobatanidzwa, uye kuchera anogona kusiya zvinhu mumakomba, zvichiita kugadzirwa kuremara. Conventional vias kazhinji akakurisa kuti aisirwe mudiki pamusoro pegomo mapedhi mune yanhasi-yakakwirira-density zvishandiso. Nekudaro, ma micropores anogona kubatsira kugadzirisa matambudziko ese aya:

Microvia inoita kuti zvive nyore kugadzira mapofu madiki uye akavigwa vias.

Micro vias ichave yakakodzera kune madiki epamusoro ekumisikidza mapedhi, achiaita akanyanya kukodzera kune yakakwira pini kuverenga zvishandiso senge bhora grid arrays (BGA).

Nekuda kwehukuru hwayo hudiki, iyo microvia inobvumira yakawanda wiring yakaitenderedza.

Nekuda kwehukuru hwayo, microvias inogona zvakare kubatsira kuderedza EMI uye kuvandudza mamwe masaini ekuvimbika nyaya.

Microvias inzira yepamusoro yekugadzira PCB. Kana redunhu bhodhi rako haadi ivo, iwe zviri pachena unoda kushandisa mureza vias kuderedza mari. Nekudaro, kana dhizaini yako yakakora uye ichida imwe nzvimbo, ona kana kushandisa microvias kuchibatsira. Senguva dzose, usati wagadzira PCB ine microvias, zviri nani kubata mugadziri wekondirakiti kuti atarise kuita kwayo.

Iko kushandiswa chaiko kweMicrovias kunoenderana nePCB yako yekugadzira maturusi

Mushure mekutanga kuonana nemugadziri, danho rinotevera nderekugadzirisa PCB yako dhizaini yekushandisa kushandisa microvias. Kuti ushandise zvinobudirira iwo madhizaini eiyo microvia dhizaini, unofanirwa kuita zvinhu zvakawanda muchishandiso. Izvi zvinosanganisira hutsva kuburikidza-gomba chimiro uye inotevera dhizaini mitemo. Microvias inogona kurongedzerwa, iyo isingawanzo kuwanikwa neyakajairwa vias, saka chishandiso chako chinofanirawo kukwanisa kubata neizvi.