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Maitiro ekuona iyo nhamba yePCB marita
Sezvo zvikamu zvakasiyana-siyana zviri muPCB zvakabatanidzwa zvakanyatsobatanidzwa, hazviwanzo kuve nyore kuona nhamba chaiyo, asi kana iwe uchichengetedza mhaka yebhodhi, iwe unogona kuchisiyanisa.
Changwara, tichaona kuti pane imwe chete kana akati wandei yezvikamu zvevachena mukati mePCB. Muchokwadi, ichi ndicho chikamu chekusimbisa pakati pezvikamu zvekuita kuti vave nechokwadi chekuti hakuzove nenhamo dzepfupi pakati pematunhu akasiyana PCB.
Zvinonzwisisika kuti iyo yazvino-layer-layer PCB mabhodhi anoshandisa mamwe mabhodhi asina kuroora kana kaviri Huwandu hwezvikamu zvePCB Board inomiririra kuti mangani marita aripo. Indepimped wiring layer, uye denderedzwa rekusimbisa pakati pezvikamu zvave nyore nzira yekuti isu titonge huwandu hwezvikamu zvePCB.
Iyo nzira yekutungamira yegomba inoshandisa iyo "Gwara gomba" pane PCB kuti uone huwandu hwePCB mataundi. Iyo nheyo inonyanya kukonzerwa neyedu tekinoroji inoshandiswa mune yedunhu rekubatana kweiyo multilayer PCB. Kana isu tichida kuona kuti vangani vane mari kuti PCB, tinogona kusiyanisa nehombodo yebhuruu, kuti mairaidhi awedzere kudarika. Bhodhi, saka tinogona kuona kuti mapini ezvikamu akatengeswa kune rumwe rutivi rwe.
Semuenzaniso, kana bhodhi rinoshandisa 4-layer bhodhi, iwe unofanirwa kuendesa waya pane yekutanga uye yechina zvikamu (chiratidzo cheSignal layer). Zvimwe zvigadziko zvine zvimwe zvinoshandiswa (pasi pevhu uye simba remagetsi). Isa Signal Signal Rayer Layer uye chinangwa chemativi maviri emagetsi emagetsi ekudzivirira kukanganiswa uye kufambisa kururamisa mutsara.
Kana imwe kiredhiti kadhi gwara ratidziro inoonekwa pane kumberi kwePCB bhodhi asi haigone kuwanikwa padivi, Eda365 yemagetsi emagetsi anotenda kuti inofanira kunge iri chikamu che6 / 8-layer. Kana iyo yakafanana kuburikidza nemakomba anogona kuwanikwa pamativi ese ePCB, ichave yemusikirwo ive 4-layer bhodhi.
Nekudaro, vazhinji vebhodhi kadhi vagadziri parizvino vanoshandisa imwe nzira yekufambisa, iyo ndeyokubatanidza mamwe emitsetse, uye inoshandisa yakavigwa Vias uye bofu Vias mukufamba. Makomba mapofu anofanirwa kubatanidza akatibatanidza zvikamu zvemukati PCB kune iyo PCEP PCB isina kupinza bhodhi redunhu rese.
Kuvigwa Vias chete batanidza kune iyo PCB yemukati, saka ivo havasi kuoneka kubva pamusoro. Sezvo gomba risingaoneki risingafanire kupinza PCB yese, kana iri matema matanhatu kana anopfuura, tarisa pabhodhi rakatarisana nechiedza, uye mwenje haungapfuura. Saka pakanga paine chirevo chakakurumbira pamberi: kutonga mana-layer uye matanhatu-denderedzwa kana pamusoro pePCbs kana iyo vias kana iyo vias leak chiedza.
Pane zvikonzero zveiyi nzira, asi hazvishande. EDA365 yemagetsi emagetsi anotenda kuti nzira iyi inogona kushandiswa chete senzira yekunongedzera.
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Kuunganidza nzira
Kuva chaiko, iyi haisi nzira, asi chiitiko. Asi izvi ndizvo zvatinofunga kuti nderechokwadi. Tinogona kutonga huwandu hwezvikamu zvePCB kuburikidza nemitsetse yeimwe PCB mabhodhi emabhodhi uye chinzvimbo chezvinhu zvezvinhu. Nekuti mune yazvino indasitiri yeAdireya iri kuchinja nekukurumidza, hapana vazhinji vagadziri vanokwanisa kudzosera PCBS.
Semuenzaniso, makore mashoma apfuura, nhamba huru yemakadhi 9550 mifananidzo yakagadzirwa ne6-layer PCBs yakashandiswa. Kana iwe uchingwarira, iwe unogona kuenzanisa kuti zvakasiyana sei kubva ku900PRO kana 9600XT. Ingo isa zvimwe zvikamu, uye chengetedza iyo yakakwirira kukwirira paPCB.
Muma1990 ezana ramakore rapfuura, pakanga paine kutaura kwakapararira panguva iyoyo: Huwandu hwePCB hunoonekwa nekuisa PCB yakatwasuka, uye vanhu vazhinji vakazvitenda. Chirevo ichi chakazobvumidzwa kuve chisina musoro. Kunyangwe kana maitiro ekugadzira panguva iyoyo akange adzokera kumashure, ziso raigona sei kuzvizivisa kure kure pane bvudzi?
Gare gare, iyi nzira yakaenderera uye yakagadziridzwa, uye zvishoma nezvishoma yadudzirwa imwe nzira yekuyera. Mazuva ano, vanhu vazhinji vanotenda kuti zvinokwanisika kuyera huwandu hwePCB zviyero nekunyatsoongorora zviridzwa zvakadai se "vernier calipers", uye hatibvumirani nezvirevo izvi.
Pasinei nekuti pane rudzi irwo rwechiridzwa chairo, nei tisingaone kuti iyo 12-layer PCB ndeye 3 times iyo gobvu re4-layer PCB? Iyo ADA365 yemagetsi yemagetsi inoyeuchidza munhu wese iyo yakasiyana PCBS inoshandisa maitiro akasiyana ekugadzira. Iko hakuna kufanana kweuniform yekuyera. Maitiro ekutonga huwandu hwezviyero zvichienderana nehukobvu?
Muchokwadi, huwandu hwePCB matanda ane pesvedzero huru pabhodhi. Semuenzaniso, nei uchifanira kungoita zvikamu zvishanu zvePCB kuisa Dual CPU? Nekuda kweizvi, PCB inogona kuve ne3 kana 4 chiratidzo chemazwi, 1 pasi layer, uye 1 kana 2 simba marita. Ipapo mitsara yemasaini inogona kuparadzaniswa zvakakwana kuti ideredze kupindirana, uye kune zvakaringana zviripo zvazvino.
Nekudaro, iyo 4-layer PCB dhizaini yakakwana zvizere mabhodhi, nepo 6-layer PCB inodhura uye haina kunyanya kuvandudzwa kwakawanda.