Chii chinonzi copper plating muPCB

Kana iyo pcb ine ivhu rakawanda, pane SGND, AGND, GND, nezvimwewo, zvichienderana nenzvimbo yePCB uso , iyo huru "ivhu" rinoshandiswa sereferenzi yeyakazvimirira copper coating, ndiko kuti, pasi rakabatana pamwechete. .

Mhangura Kuputira Plating Zvirongwa

Yakazadzwa kuburikidza-mu-pad zvimiro zvinoda kuburikidza nemakomba kuti mhangura yakaputirwa kuitira kuti ifambise masaini pakati pezvikamu muPCB yakawanda. Iyi plating inobatanidza kune mamwe mapedhi mune via-mu-pad zvimiro, pamwe chete zvakananga kune inoteedzera uchishandisa diki annular mhete. Aya maumbirwo akakosha, asi anozivikanwa kuve ane mamwe matambudziko ekuvimbika pasi pekudzokororwa kupisa bhasikoro.

Iyo IPC 6012E zviyero nguva pfupi yadarika yakawedzera chinodikanwa chemhangura yekuputira kune kuburikidza-mu-pad zvimiro. Iyo yakazadzwa yemhangura plating inofanirwa kuenderera yakatenderedza kumucheto kwegomba uye kuenderera kune annular mhete yakatenderedza iyo via pad. Ichi chinodiwa chinonatsiridza kuvimbika kweiyo kuburikidza neplating uye ine mukana wekudzikisa kutadza nekuda kwekutsemuka, kana nekuda kwekuparadzaniswa pakati pezvimiro zvepasi uye zvakaputirwa kuburikidza negomba.

Zvimiro zvemhangura zvakazadzwa zvinoonekwa mumhando mbiri. Kutanga, firimu remhangura rinoenderera rinogona kuiswa mukati mevhavha, iro rinobva raputira pamusoro nepamusoro pezvikamu zvezasi pamagumo evhavha. Iyi yekuputira yemhangura yemhangura inobva yagadzira iyo via pad uye inoteedzera inotungamira kune iyo via, ichigadzira inoenderera yemhangura chimiro.

Neimwe nzira, iyo via inogona kuve neyayo yakaparadzana pad yakaumbwa kutenderera kumagumo eiyo via. Iyi yakapatsanurwa pad layer inobatanidza kune zvinoteedzera kana ndege dzepasi. Iyo mhangura yemhangura inozadza iyo via inoputira pamusoro peiyi padhi rekunze, ichigadzira chibatanidzo chebutt pakati pemhangura yekuzadza plating uye via padhi. Kumwe kusungirirana kunoitika pakati pekuzadza plating uye via pad, asi izvo zviviri hazvisanganise pamwechete uye hazviumbe imwechete inoenderera chimiro.

Pane zvikonzero zvakati kuti copper plating:

1. EMC. Kune nzvimbo yakakura yevhu kana simba mhangura, ichadzivirira, uye imwe yakakosha, yakadai sePGND kuchengetedza.

2. PCB process zvinodiwa. Kazhinji, kuitira kuti ive nechokwadi chekuti plating mhedzisiro, kana laminate haina kuremara, mhangura inoiswa kune PCB layer ine shoma wiring.

3. Chiratidzo chekutendeseka zvinodiwa, kupa high-frequency digital signal nzira yakakwana yekudzoka, uye kuderedza wiring yeDC network. Ehe, kune kupisa kupisa, yakakosha yekumisikidza mudziyo inoda mhangura yemhangura uye zvichingodaro.

Kubatsira kukuru kwemhangura yemhangura ndeyekuderedza mutsara wepasi impedance (iyo inonzi anti-interference inokonzerwawo nechikamu chikuru chepasi pasi impedance kuderedza). Kune akawanda spike mafungu mudhijitari wedunhu, saka zvakanyanya kudikanwa kudzikisa pasi mutsara impedance. Zvinowanzotendwa kuti masekete anoumbwa akazara emidziyo yedhijitari anofanirwa kudzikwa pamusoro penzvimbo yakakura, uye kune analogi maseketi, iyo yepasi loop inogadzirwa nemhangura yemhangura inogona kukonzera kukanganiswa kwe electromagnetic coupling kuve yakaderera (kunze kwekuwanda kwemaseketi). Naizvozvo, haisi dunhu rinofanirwa kunge riri mhangura (BTW: mesh mhangura iri nani pane iyo block yese).

Zvinokosha zvedunhu copper plating:

1. mhangura uye pasi waya yakabatana, izvi zvinogona kuderedza loop nzvimbo

2. nzvimbo huru yemhangura yemhangura yakaenzana nekuderedza kushorwa kwetambo yepasi, kuderedza kudonha kwekumanikidzwa kubva kumativi maviri aya Zvinonzi zvose pasi pedhijitari uye pasi analog inofanira kuva mhangura kuti iwedzere simba rekudzivirira, uye pa. high frequencies, iyo digitaalinen pasi uye anaroji pasi inofanira kuparadzaniswa kuisa mhangura, uye ipapo yakabatana nechinhu chimwe chete, iyo imwe pfungwa inogona Shandisa tambo kuita zvishomanana zvishoma pane magnetic ring uye wozobatanidza. Nekudaro, kana iyo frequency isiri yakanyanya, kana mamiriro ekushanda echiridzwa haana kushata, unogona kuzorora zvishoma. Iyo crystal inogona kuverengerwa seyakakwira-frequency sosi mudunhu. Iwe unogona kuisa mhangura kutenderedza uye kugadzika iyo crystal kesi, iri nani.

Kana iwe uchida kudzidza zvakawanda nezveYMS PCB, taura nesu chero nguva.