Mazuva ano, iyo inowedzera compact maitiro ezvigadzirwa zvemagetsi zvinoda matatu-dimensional dhizaini yeakawanda akadhindwa edunhu mabhodhi.Nekudaro, layer stacking inomutsa nyaya nyowani dzine chekuita neiyi dhizaini maonero.Rimwe rematambudziko nderekuwana yakakwirira-yepamusoro layered kuvaka yepurojekiti.
Sezvo akawanda uye akaomarara akadhindwa maseketi anoumbwa neakawanda akaturikidzana achigadzirwa, kurongedza kwePCB kwave kwakakosha zvakanyanya.
Iyo yakanaka PCB stack dhizaini yakakosha kudzikisa radiation yePCB zvishwe uye ane hukama maseketi.Pane zvinopesana, kuunganidza kwakashata kunogona kuwedzera zvakanyanya mwaranzi, iyo inokuvadza kubva kune yakachengeteka nzvimbo yekuona.
Chii chinonzi PCB stackup?
Pamberi pekupedzisira dhizaini yapedzwa, iyo PCB stackup inoisa insulator nemhangura yePCB.Kugadzira inobudirira stacking inzira yakaoma.PCB inobatanidza simba uye masaini pakati pemidziyo yepanyama, uye kurongeka kwakaringana kwezvinhu zvedunhu rebhodhi zvinokanganisa basa rayo.
Nei tichifanira laminate PCB?
Iko kuvandudzwa kwePCB stackup kwakakosha pakugadzira mabhodhi edunhu anoshanda.PCB stackup ine akawanda mabhenefiti, nekuti iyo multilayer chimiro inogona kuvandudza kugovera kwesimba, kudzivirira kukanganiswa kwemagetsi, kudzikamisa kupindira kwemuchinjiko, uye kutsigira yakakwirira-kumhanya chiratidzo chekufambisa.
Kunyange zvazvo chinangwa chikuru chekugadzirisa chiri chekuisa akawanda emagetsi maseketi pane imwe bhodhi kuburikidza neakawanda akaturikidzana, iyo yakaturikidzana chimiro chePCBs inopawo zvimwe zvakakosha zvakanakira.Matanho aya anosanganisira kudzikisira kusagadzikana kwemabhodhi edunhu kune ruzha rwekunze uye kuderedza crosstalk uye impedance matambudziko mumasisitimu ekumhanya.
Iyo yakanaka PCB stackup inogona zvakare kubatsira kuve nechokwadi yakaderera yekupedzisira yekugadzira mutengo.Nekuwedzera kushanda nesimba uye nekuvandudza kuenderana kwemagetsi kwepurojekiti yese, PCB stacking inogona kunyatso kuchengetedza nguva nemari.
Kuchengetedza uye mitemo yePCB laminate dhizaini
● Nhamba yezvikamu
Nyore akaturikidzana anogona kusanganisira mana-layer PCBs, nepo mamwe akaomarara mabhodhi anoda nyanzvi sequential lamination.Kunyangwe zvakanyanya kuomarara, huwandu hwepamusoro hwematanho hunobvumira vagadziri kuti vave nenzvimbo yakawanda yekurongeka pasina kuwedzera njodzi yekusangana nemhinduro dzisingagoneke.
Kazhinji, masere kana anopfuura akaturikidzana anodiwa kuti uwane yakanakisa dhizaini kurongeka uye spacing kuti uwedzere kushanda.Kushandisa ndege dzemhando yepamusoro uye ndege dzemagetsi pamabhodhi akawanda zvinogona zvakare kuderedza mwaranzi.
● Gadziriro yenhevedzano
Kurongeka kwemhangura yemhangura uye insulating layer inoumba dunhu inoumba PCB inopindirana kushanda.Kuti udzivise PCB warping, zvinodikanwa kuita kuti chikamu chemuchinjiko chebhodhi chienzane uye chakaenzana kana uchiisa kunze zvidimbu.Semuenzaniso, mubhodhi-masere, hupamhi hwechipiri uye chechinomwe hunofanira kufanana nekuwana chiyero chakanakisisa.
Chiratidzo chechiratidzo chinofanira kugara chiri padyo nendege, nepo ndege yemagetsi nendege yemhando yakanyatsobatanidzwa pamwe chete.Zvakanakisa kushandisa ndege dzepasi dzakawanda, nekuti dzinowanzo dzikisa radiation uye yakadzika pasi impedance.
● Rudzi rwezvinhu
Izvo zvinopisa, zvemagetsi, uye zvemagetsi zvega yega substrate uye mabatiro avanoita zvakakosha pakusarudzwa kwePCB laminate zvinhu.
Bhodhi redunhu rinowanzo umbwa negirazi rakasimba fiber substrate core, iyo inopa ukobvu uye kusimba kwePCB.Mamwe maPCB anochinjika anogona kugadzirwa nemapurasitiki anochinjika epamusoro-tembiricha.
Musoro wepamusoro ipepa rakatetepa rakagadzirwa nemhangura foil yakasungirirwa pabhodhi.Mhangura iripo pamativi ese ePCB ine mativi maviri, uye ukobvu hwemhangura hunosiyana zvichienderana nenhamba yezvikamu zvePCB stack.
Ivhara pamusoro pefoiri yemhangura ine solder mask kuti iite maronda emhangura abatane nemamwe masimbi.Ichi chinyorwa chakakosha kubatsira vashandisi kuti vadzivise kutengesa iyo chaiyo nzvimbo yejumper waya.
Chidzitiro chekudhinda chidzitiro chinoiswa pane solder mask kuti uwedzere zviratidzo, nhamba uye mavara kuti kufambisa gungano uye kubvumira vanhu kuti vanzwisise zviri nani bhodhi redunhu.
● Sarudza wiring uye kuburikidza nemakomba
Vagadziri vanofanirwa kufambisa masaini ekumhanya-mhanya pachikamu chepakati pakati pematanho.Izvi zvinobvumira ndege yepasi kuti ipe dziviriro ine mwaranzi inoburitswa kubva munjanji ichimhanya zvakanyanya.
Kuiswa kweyero yechiratidzo padhuze nedanho rendege inobvumira kudzoka ikozvino kuyerera mundege iri pedyo, nokudaro kuderedza nzira yekudzoka inductance.Iko hakuna kukwana capacitance pakati pesimba repedyo nendege dzepasi kupa decoupling pazasi 500 MHz uchishandisa yakajairwa kuvaka maitiro.
● Kupatsanurana pakati pezvikamu
Nekuda kweiyo yakaderedzwa capacitance, kusimba kubatana pakati pechiratidzo uye ikozvino ndege yekudzoka kwakakosha.Simba uye ndege dzepasi dzinofanirawo kubatanidzwa zvakasimba pamwe chete.
Iwo masignal layers anofanirwa kugara ari padhuze kune mumwe nemumwe kunyangwe ari munzvimbo dziri pedyo nendege.Kubatana kwakasimba uye kupatsanurana pakati pematanho kwakakosha kune isina kukanganiswa masaini uye kushanda kwese.
to sum up
Kune akawanda akasiyana multilayer PCB board madhizaini muPCB stacking tekinoroji.Kana akaturikidzana akawanda achibatanidzwa, nzira yemativi matatu inotarisa chimiro chemukati uye marongerwo epamusoro inofanira kubatanidzwa.Nekumhanya kwakanyanya kwemaseketi emazuva ano, kungwarira PCB stack-up dhizaini inofanirwa kuitwa kuvandudza kugona kwekugovera uye kumisa kupindira.PCB isina kugadzirwa inogona kuderedza kutapurirana kwechiratidzo, kugadzira, kutapurirana kwemagetsi, uye kuvimbika kwenguva refu.