Kuburikidza neburi (VIA) chikamu chakakosha che multilayer pcb, uye mutengo wemakomba ekuchera unowanzo kuve 30% kusvika 40% yemutengo wePBB board board inogadzira. Zvichitaurwa zviri nyore, gomba rega rega paPCB rinogona kunzi pfuuri gomba. Panyaya yekushanda, gomba rinogona kukamurwa muzvikamu zviviri: imwe inoshandiswa yekubatanidza magetsi pakati pezvikamu; Imwe yacho inoshandiswa kugadzirisa dhizaini kana kuisa panzvimbo.

Mukutaura kwemaitiro, aya maburi-anoburitswa anowanzo kuve akapatsanurwa muzvikamu zvitatu, zvinoti bofu kuburikidza, kuvigwa kuburikidza nekupfuura nepakati. Makomba mapofu ari kumusoro nepamusoro ezasi ePRINTED wedunhu bhodhi uye ane humwe hudzamu hwekubatanidza pamusoro wedunhu kune yemukati redunhu pazasi. Kudzika kwemakomba kazhinji hakupfuure imwe chiyero (kuzarura). Maburi akavigwa maburi ekubatanidza mukati mechikamu chemukati chebhodhi redunhu rakadhindwa risingatambanuke kusvika pamusoro pebhodhi redunhu rakadhindwa. Iwo marudzi maviri emaburi ari mukati mechikamu chemukati chebhodhi redunhu, iro rinozadzikiswa neiyo yeku-gomba yekuumba maitiro isati yadzvanywa, uye akaturikidzana akati wandei mukati anogona kugadzirwa panguva yekuumbwa kweiyo-yegomba. Rudzi rwechitatu, rwunonzi kuburikidza-maburi, runomhanya nemudunhu rese redunhu uye runogona kushandiswa mukubatana kwemukati kana sekumisikidza nekutsvaga maburi ezvinhu. Nekuti iro gomba riri nyore kushandisa mukuita, mutengo wakaderera, saka mazhinji akadhindwa wedunhu mabhodhi anoishandisa, pane mamwe maviri marudzi ekupfuura nepaburi. Izvi zvinotevera kuburikidza nemakomba, pasina tsananguro yakasarudzika, ichaonekwa sekunge kuburikidza nemakomba.

Zvakawanda sei zvaunoziva nezve pcb dhizaini gomba

Kubva pane dhizaini yekuona, iyo-yegomba-inonyanya kugadzirwa nezvikamu zviviri, imwe igomba rekuboora pakati uye imwe nzvimbo yepad yakatenderedza gomba rekuboora, sezvakaratidzwa mumufananidzo uri pazasi. Hukuru hwezvikamu zviviri izvi hunosarudza hukuru hwepakati-buri. Zviripachena, mukugadzirwa kweiyo-kumhanya-kumhanya, yakakwira-density PCB, iyo dhizaini inogara ichida kuti gomba riite diki sezvinobvira, uyu muyenzaniso unogona kusiya yakawanda wiring nzvimbo, uyezve, idiki gomba, iro rayo parasite capacitance idiki, zvimwe inokodzera yedhijidhi-inomhanya. Asi iyo gomba saizi inoderera panguva imwe chete inounza kuwedzera kwemutengo, uye saizi yegomba haigone kudzikiswa pasina muganho, inogumirwa nekuchera (kuboora) nekupenda (ra) nehumwe hunyanzvi: iyo diki gomba, iyo kureba zvinotora kubaya, zviri nyore kutsauka kubva pakati; Kana iko kudzika kwegomba kuri kudarika ka6 dhayamita yegomba, hazvigoneke kuvimbisa yunifomu yendarira yakanamirwa pamadziro egomba. Semuenzaniso, iyo yazvino yakasviba ukobvu (kuburikidza negomba kudzika) ye6-rara pcb bhodhi iri pamusoro pe50Mil, saka hushoma hwekuchera dhayamita iyo pcb vagadziri vanogona kupa inogona chete kusvika 8Mil. Icho chisvetasimba capacitance chegomba pacharo chiripo pasi, kana hupamhi hwekupatsanura gomba iri D2, iyo dhayamita yegomba padhi iri D1, ukobvu hwePCB bhodhi ndiT, uye dielectric inogara iripo yeiyo substrate ndeye ε, chisvetasimba capacitance chegomba rinenge: C = 1.41εTD1 / (D2-D1)

Mhedzisiro huru yehutachiona capacitance padunhu ndeyekuwedzera iyo nguva yekukwira kwechiratidzo uye nekudzora kumhanya kwedunhu. Semuyenzaniso, kuti pcb bhodhi ane ukobvu 50Mil, kana yomukati dhayamita mugomba iri 10Mil, dhayamita ari ikanyanya iri 20Mil, uye chinhambwe pakati ikanyanya uye yendarira uriri iri 32Mil, tinogona anofungidzira ari tupukanana capacitance yegomba uchishandisa fomula iri pamusoro: C = 1.41 × 4.4 × 0.050 × 0.020 / (0.032-0.020) = 0.517pF, iyo nguva yekukwira misiyano inokonzerwa nechikamu ichi chekwanisi ndeye: T10-90 = 2.2C (Z0 / 2) = 2.2 × 0.517x (55 / 2) = 31.28ps. Kubva pane aya maitiro, zviri pachena kuti kunyangwe mhedzisiro yehutachiona capacitance kubva kune rimwe gomba pakukwira kunonoka haisi pachena, vagadziri vanofanirwa kungwarira kana maburi mazhinji achishandisirwa switch-to-layer switching.

Mukugadzirwa kwemaseketi emadhigidhi-epamusoro, iyo indasiti yekukonzeresa kwepasiti inductance kuburikidza negomba inowanzo kuve yakakura kudarika kukanganiswa nehutachiona capacitance. Yayo parasitic nhepfenyuro inductance inonetesa mupiro wekudarika capacitance uye kudzora kusefa kugona kwesimba rese system. Tinogona kungoverenga iyo indasca inductance ye-kuburikidza-gomba fungidziro tichishandisa inotevera fomula: L = 5.08h [ln (4h / d) +1] apo L inoreva kune-kuburikidza-gomba inductance, h ndiko kureba kwekudarika- gomba, uye D ndiyo dhayamita yepakati gomba. Inogona kuonwa kubva kuiyo equation kuti hupamhi hwegomba hune hunyanzvi pane iyo inductance, nepo hurefu hwegomba huine simba rakanyanya pane inductance. Ndichiri kushandisa iri pamusoro muenzaniso, iyo inductance kubva mugomba inogona kuverengerwa seL = 5.08 × 0.050 [ln (4 × 0.050 / 0.010) +1] = 1.015nh. Kana iyo nguva yekukwira kwechiratidzo iri 1ns, saka iyo yakaenzana impedance saizi iri: XL = πL / T10-90 = 3.19 ω. Iyi impedance haigone kufuratirwa muhupo hweakakwira frequency yazvino. Kunyanya, iyo yekupfuura capacitor inofanirwa kupfuura nepakati pemaburi maviri kuti ibatanidze iyo yekudyara dura kune iyo fomati, nokudaro ichipeta kupaza kwehutachiona kweiyo gomba.

Kuburikidza neongororo iri pamusoro pehunhu hwehutachiona hwegomba, tinogona kuona kuti mune yakakwira-kumhanya pcb dhizaini, gomba rinoita seriri nyore rinowanzo kuunza zvakakomba zvakashata kune dhizaini dhizaini. Nekuda kwekudzora mhedzisiro inokanganisa hutachiona hwegomba, tinogona kuita zvakanyanya sezvinobvira mukugadzirwa: 1. Kubva kumativi maviri emutengo uye mhando yemasaini, sarudza saizi inonzwisisika yegomba. Semuenzaniso, kune 6-10 masara eMEMORY module PCB dhizaini, zvirinani kusarudza 10 / 20mil (kuchera / padhi) kuburikidza negomba, kune imwe yakakwira-density diki saizi bhodhi, iwe unogona zvakare kuedza kushandisa 8 / 18mil kuburikidza gomba. Netekinoroji yazvino, zvingave zvakaoma kushandisa maburi madiki. Kune magetsi kana waya yepasi kuburikidza nemakomba inogona kutariswa kushandisa saizi hombe kudzikisa impedance.

2. Mafomura maviri akurukurwa pamusoro apa anoratidza kuti mashandisirwo emabhodhi ePBB akatetepa anobatsira kudzora maparamendi maviri kuburikidza nemakomba.

3. iyo wiring yechiratidzo pabhodhi rePCBB haifanire kuchinjisa dura kusvika pazvinogoneka, ndiko kuti, edza kusashandisa maburi asina basa.

4. Pini dzemagetsi uye nevhu rinofanira kucherwa padyo. Iyo ipfupi iyo inotungamira pakati pemapini nemakomba, zvirinani, nekuti zvinotungamira mukuwedzera kwe inductance. Panguva imwecheteyo, simba uye pasi zvinotungamira zvinofanirwa kunge zvakakora sezvazvinogona kudzora impedance.

5. Isa maburi ekumisikidza padyo nemakomba eiyo shanduko yechiratidzo kuitira kuti upe chiuno chinenge chiri padyo nechiratidzo. Iwe unogona kunyange kuisa yakawanda yakawanda yekuwedzera maburi epasi paPCB. Ehe, iwe unofanirwa kuve unochinjika mukugadzira kwako. Iyo yemukati-yegomba modhi inokurukurwa pamusoro ndeye mamiriro ezvinhu apo pane mapadhi mune yega yega. Dzimwe nguva, tinogona kudzikisa kana kubvisa pads mune mamwe matete. Kunyanya muchiitiko chegomba rehupamhi rakakura kwazvo, zvinogona kutungamira mukuumbwa kwenzvimbo yakatemwa yedunhu mumutsara wemhangura, kugadzirisa dambudziko rakadaro mukuwedzera pakufambisa nzvimbo yegomba, tinogona zvakare kufunga gomba mumutsara wemhangura kudzikisa saizi yepad.