Iyo PCB yemidziyo yezvigadzirwa yakashandisa huwandu hwakakosha hwenguva dzekuvandudza zvinhu zvinopa kurasikirwa kwakaderera chiratidzo. Nekumhanya kwakanyanya uye kukwirira kwakanyanya, kurasikirwa kuchagumisa chiratidzo chekuparadzira nzvimbo uye kukanganisa masaini, uye ichagadzira kutsauka kwekushandurwa kunogona kuoneka muTDR zviyero. Patinogadzira chero redunhu rakadhindwa riya rinoshanda pamatunhu epamusoro, zvinogona kunge zvichisarudza kusarudza iyo mangozi mangozi yemhangura mune zvese zvigadzirwa zvaunogadzira.

Kunyange ichokwadi kuti mhangura roughness inogadzira kumwe kutsauka kwekusatsauka uye kurasikirwa, kuparadzwa kwako kwemhangura kunonyatsoda kuve? Pane dzimwe nzira dziri nyore dzaunogona kushandisa kukurira kurasikirwa pasina kusarudza tarisiro yehupamhi yegadziriro yega yega? Tichatarisa pane idzi pfungwa mune ino chinyorwa, pamwe nezvaunogona kutarisa kana iwe ukatanga kutenga yePCB stackup zvinhu.

Mhando dzePCB yemhangura foil

Kazhinji kana tichitaura nezve mhangura pamhosva yePCB, hatitaure nezve rudzi rwechirudzi rwepamhora, isu tinongotaura nezve kuoma kwaro. Nzira dzakasiyana dzemhangura dzinogadzira mafirimu ane mafirimu akasiyana siyana, izvo zvinogona kusiyanisa zvakajeka mumufananidzo wekutarisa Electroncope (sem) mufananidzo. Kana iwe uchizove uchishandisa high frequed

Zvakare, ita shuwa kuti unzwisise zvinorehwa neDK tsika mune datasheet. Tarisa iyi yekudirana kwePodcast neJohn Coonrod kubva kuRoger kuti vadzidze zvakawanda nezve dk zvinotsanangurwa. With that in mind, let's look at some of the different types of PCB copper foil.

Electrodeposited

Muchiitiko ichi, chigubhu chakasururwa kuburikidza nemhinduro yemagetsi, uye maitiro emagetsi anoshandiswa "kukura" marara emhangura pane chigubhu. Sezvo chigubhu chinotenderera, iyo yakakonzerwa nemhangura yefirimu yakaputirwa zvishoma pane roller, ichipa pepa richaenderera rerwendo rwemhangura iyo inogona kuzoputirwa pane laminate. Rutivi rwemberi rwemhangura ruchanyatsoenderana nehasha dzechigubhu, nepo iro rutivi rwakafumurwa richanyorova zvakanyanya.

Electrodeposited CPB Copper Foil

Electrodeposited kugadzirwa kwemhangura.
Kuti ishandiswe mune yakajairwa PCB Fabration Proction, iyo yakaomesesa yemhangura inotanga kusungwa kune girazi-resin dielectric. Iyo yakasara yakafumurwa mhangura Izvi zvichave nechokwadi kuti zvinogona kusungirirwa kune inotevera danda muPCB stackup.

Pamusoro-kurapwa electrodeposited they

Ini handizive izwi rakanakisa rinokomberedza marudzi ese akasiyana ezvikamu zvakabatwamhangura yemhangura, saka musoro uri pamusoro. Izvi zvinhu zvemhangura zvinonyanya kuzivikanwa se reverse dzakarapwa foils, kunyangwe dzimwe dzakasiyana siyana dziripo (ona pazasi).

Reverse Break Hosha Shandisa kurapwa kwepasi uko kunoiswa kune iyo yakatsiga side (drum rutivi) yeiyo electrodeposed buthorita renhabvu. Raya yekurapa ingori kutetepa kutetepa iyo nemaune kugomba mhangura, saka ichava neyakakura kuomerera kune chikafu che dielectric. Aya marapirwo anoitawo se oxidation chipinganidzo chinodzivirira kuora. Kana iyi mhangura ichishandiswa kugadzira mapani ekurambidza, iro rutivi rwakatorwa runosungirwa kune dielelectric, uye iyo yakasara yakasara yakaramba ichiratidzwa pachena. Iyo yakafumurwa chikamu haizodi chero yekuwedzera kusimuka pamberi pekutora; Iyo ichave yatove nesimba rakakwana rekubatanidza kune inotevera danda muPCB stackup.

Matatu matatu pane reverse Bata Copper Foil inosanganisira:

Kukwikwidza kwakanyanya Chiso chinofumurwa chinobatwawo neiyo oxidation chipinganidzo kudzivirira kuora panguva yekuchengetedza.
Doil-yakabatwa foil: mune iyi mhangura foil, kurapwa kunoiswa kumativi ese efirimu. Izvi zvinyorwa dzimwe nguva zvinonzi chidhiramu-chikamu chakabatwa foil.
Kurwisa mhangura: Izvi hazvigone kuiswa semhangura-yemhangura. Iyi yemhangura foil inoshandisa simbi yekuvhara pamusoro peiyo matte emhangura, iyo yakabva yadzingwa padanho raunoda.
Kumwe kurapwa kwekushandisa mune aya midziyo yemhanguri yakananga: Iyo foil inokandwa kuburikidza neyekuwedzera electrolyte yekugezesa yemhangura yemhangura, inoteverwa nembeu yemberi, uye pakupedzisira inti-tarnish firimu renyama.

PCB yemhangura foil

Pamusoro pekurapa maitiro emhosva yemhangura. [Kunobva: Pytel, Steven G., et Al. "Kuongororwa kwemhangura kurapa uye mhedzisiro pakuparidza nhema." Muna 2008 58th Electronic zvikamu uye tekinoroji musangano, mapeji 1144-1149. Aeee, 2008.]
Nezviitiko izvi, iwe une zvinhu zvinogona kushandiswa zviri nyore mu standard board fabration maitiro nekuita zvishoma kuwedzera kugadzirisa.

Rakapetwa-dzungudutswa ndarira

Makanaka-akadzika-exper copper copper glodi anozopfuura roll of copper foil kuburikidza nehurefu hwenorevhizheni, iyo inotonhora-roll sheetheni kune iyo mhangura yakajeka. Iko kushomeka kweiyo inokonzeresa foil sheet ichasiyana zvichienderana neyekuenderera mberi paramita (kumhanya, kumanikidzwa, nezvimwewo).

SEPE RINOGONESESA RINOGONA KUTI TINOGONA KUTI UYE KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI KUTI URI Mifananidzo iri pazasi inoratidza kuenzanisa pakati peiyo Electrodepositiki foil uye fooled-yakavanzika foil.

PCB yemhangura foil kuenzanisa

Kuenzanisa kweElelelecesited Vs. rakarukwa rakarukwa.
Low-Profess Ndira
Izvi hazvisizvo chaizvo mhando yemhangura foil iwe yaungaraira neimwe nzira. Low-profer Copper ndeye Electrodeposited yemhangura iyo inobatwa uye yakashandurwa neyakagadziriswa micro-yekugadzirisa kuti ipe yakaderera yakaderera kuomarara nekukwana kuendeswa kune substrate. Maitiro ekugadzira aya mapopu emhangura anowanzo propertyary. Idzi gwaro dzinowanzove dzakamutswa se Ultra-Low profile (ULP), Low Low profile (vlp), uye yakangoderera-profil-profile (lp, inenge 1 micron average average.

Zvinyorwa Zvinoenderana:

Nei foil yemhangura ichishandiswa muPCB kugadzira?

Copper foil inoshandiswa mune yakadhindwa wedunhu board