[VW PCBworld] Vagadziri vanogona kugadzira zvisingaite-nhamba dzakadhindwa mabhodhi edunhu (PCBs).Kana iyo wiring isingade yakawedzera layer, nei uchiishandisa?Kuderedza zvidimbu hazvingaiti kuti bhodhi redunhu riite mutete?Kana paine bhodhi redunhu rakaderera, mari yacho haingave yakaderera here?Zvisinei, mune dzimwe nguva, kuwedzera chidimbu kunoderedza mari.
Chimiro chebhodhi redunhu
Mabhodhi edunhu ane zvimiro zviviri zvakasiyana: core structure uye foil chimiro.
Muchikamu chemukati, ese conductive layers mubhodhi redunhu akaputirwa pane yakakosha zvinhu;mune foil-clad chimiro, chete yemukati conductive layer yedunhu redunhu yakaputirwa pane yakakosha zvinhu, uye yekunze conductive layer ifoil-clad dielectric board.Yese conductive layers inosungirirwa pamwechete kuburikidza nedielectric uchishandisa multilayer lamination process.
Chigadzirwa chenyukireya ndicho bhodhi rine mativi maviri akapfeka foil mufekitari.Nekuti imwe neimwe core ine mativi maviri, kana yashandiswa zvizere, nhamba ye conductive layer yePCB inhamba yakaenzana.Wadii kushandisa foil kune rumwe rutivi uye musimboti chimiro kune mamwe ese?Zvikonzero zvikuru ndezvi: mutengo wePCB uye dhigirii rekukotama rePCB.
Mutengo wakanakira wechero-nhamba dzedunhu mabhodhi
Nekuda kwekushaikwa kwedhizaini ye dielectric uye foil, mutengo wezvigadzirwa zvezvisinganzwisisike-nhamba dzePCBs wakadzikira zvishoma pane iwo kunyange-nhamba-nhamba maPCB.Nekudaro, iyo mutengo wekugadzirisa weodd-layer PCBs wakakwira zvakanyanya kupfuura iwo ee even-layer PCBs.Mutengo wekugadzirisa wemukati wemukati wakafanana;asi iyo foil / musimboti chimiro sezviri pachena inowedzera mutengo wekugadzirisa weiyo yekunze layer.
Odd-numbered-layer PCBs inoda kuwedzera isiri-standard laminated core layer bonding process yakavakirwa pamusimboti chimiro maitiro.Zvichienzaniswa nechimiro chenyukireya, kugona kugadzira kwemafekitari anowedzera foil kuchimiro chenyukireya kunoderera.Pamberi pe lamination uye bonding, yekunze musimboti inoda kumwe kugadziridzwa, izvo zvinowedzera njodzi yekukwenya uye etch zvikanganiso pane yekunze layer.
Balance chimiro kudzivirira kukotama
Chikonzero chakanakisa chekusagadzira PCB nenhamba isinganzwisisike yezvikamu ndezvekuti nhamba isinganzwisisike yemapuranga edunhu mabhodhi ari nyore kukotama.Kana iyo PCB yatonhodzwa mushure meiyo yakawanda-layer yedunhu rekubatanidza maitiro, akasiyana lamination makakatanwa eiyo musimboti chimiro uye foil-akapfeka chimiro achaita kuti PCB ikotame.Sezvo ukobvu hwebhodhi redunhu hunowedzera, njodzi yekukotama yePCB inoumbwa ine maviri akasiyana zvimiro inowedzera.Kiyi yekubvisa redunhu bhodhi kubhenda ndeyekutora yakaringana stack.
Kunyangwe iyo PCB ine imwe dhigirii yekukotama inosangana nezvinodiwa, iyo inotevera yekugadzirisa inoshanda inodzikiswa, zvichikonzera kuwedzera kwemutengo.Nemhaka yokuti midziyo yakakosha uye mhizha inodiwa panguva yegungano, kururamisa kwekuiswa kwechikamu kunoderedzwa, izvo zvinokuvadza kunaka.
Shandisa kunyange-nhamba-nhamba PCB
Kana PCB isinganzwisisike-inooneka mudhizaini, nzira dzinotevera dzinogona kushandiswa kuwana zvakadzikama stacking, kuderedza mutengo wekugadzira PCB, uye kudzivirira PCB kukotama.Nzira dzinotevera dzakarongwa maererano nezvinodiwa.
Chiratidzo chechiratidzo uye chishandise.Iyi nzira inogona kushandiswa kana simba rekugadzira PCB rakaenzana uye chiratidzo chechiratidzo chisinganzwisisike.Iyo yakawedzerwa layer haina kuwedzera mutengo, asi inogona kupfupisa nguva yekuendesa uye kugadzirisa kunaka kwePCB.
Wedzera imwe simba rekuwedzera.Iyi nzira inogona kushandiswa kana simba rekugadzira PCB risinganzwisisike uye chiratidzo chechiratidzo chakaenzana.Nzira iri nyore ndeyekuwedzera jira pakati pechitubu pasina kushandura mamwe marongero.Chekutanga, fambisa waya mune isinganzwisisike-nhamba layer PCB, wobva wakopa pasi pasi pakati, womaka zvidimbu zvasara.Izvi zvakafanana nemagetsi emhando yefoil yakakora.
Wedzera isina chinhu chiratidzo musara padyo nepakati pePCB stack.Iyi nzira inoderedza kusaenzana kwekuisa uye inovandudza kunaka kwePCB.Chekutanga, tevera akaturikidzana-ane manhamba kuti afambe, wobva wawedzera isina chinhu chiratidzo dhizaini, womaka matinji asara.Inoshandiswa mu microwave maseketi uye yakasanganiswa midhiya (yakasiyana dielectric constants) maseketi.
Zvakanakira zvakaenzana laminated PCB
Mutengo wakaderera, hausi nyore kukotama, kupfupisa nguva yekuendesa uye kuve nechokwadi chemhando.