Masiku ano, kuchulukirachulukira kwazinthu zamagetsi kumafunikira mawonekedwe amitundu itatu amitundu yambiri yosindikizidwa.Komabe, masanjidwe osanjikiza amadzutsa nkhani zatsopano zokhudzana ndi kapangidwe kake.Limodzi mwamavuto ndikupeza zomanga zapamwamba kwambiri za polojekitiyi.
Pamene mabwalo osindikizira ochulukirapo opangidwa ndi zigawo zingapo amapangidwa, kuyika kwa ma PCB kwakhala kofunika kwambiri.
Mapangidwe abwino a PCB stack ndikofunikira kuti muchepetse kuyatsa kwa malupu a PCB ndi mabwalo ofananira.M'malo mwake, kudzikundikira koyipa kumatha kukulitsa kwambiri ma radiation, omwe ndi owopsa poyang'ana chitetezo.
Kodi PCB stackup ndi chiyani?
Kukonzekera komaliza kusanamalizidwe, PCB stackup imayika insulator ndi mkuwa wa PCB.Kupanga stacking yothandiza ndi njira yovuta.PCB zikugwirizana mphamvu ndi zizindikiro pakati pa zipangizo thupi, ndi wosanjikiza olondola zipangizo dera gulu mwachindunji zimakhudza ntchito yake.
N'chifukwa chiyani tiyenera laminate PCB?
Kukula kwa PCB stackup ndikofunikira pakupanga ma board oyendetsa bwino.PCB stackup ili ndi maubwino ambiri, chifukwa mawonekedwe a multilayer amatha kupititsa patsogolo kugawa mphamvu, kuteteza kusokoneza kwa ma elekitiroma, kuchepetsa kusokoneza, ndikuthandizira kufalitsa ma siginecha othamanga kwambiri.
Ngakhale cholinga chachikulu cha stacking ndikuyika mabwalo angapo apakompyuta pa bolodi limodzi kudzera mumagulu angapo, kapangidwe kake ka PCB kamaperekanso zabwino zina.Njirazi zikuphatikiza kuchepetsa kusatetezeka kwa ma board ozungulira phokoso lakunja ndikuchepetsa zovuta za crosstalk ndi impedance pamakina othamanga kwambiri.
Kusungirako bwino kwa PCB kungathandizenso kuonetsetsa kuti mtengo womaliza ukhale wotsika.Mwa kukulitsa magwiridwe antchito ndikuwongolera magwiridwe antchito a electromagnetic polojekiti yonse, kuyika kwa PCB kumatha kupulumutsa nthawi ndi ndalama.
Kusamala ndi malamulo a PCB laminate mapangidwe
● Chiwerengero cha zigawo
Kusunga kosavuta kungaphatikizepo ma PCB azigawo zinayi, pomwe matabwa ovuta amafunikira akatswiri otsatizana.Ngakhale kuti zimakhala zovuta kwambiri, chiwerengero chapamwamba cha zigawo chimalola okonza kuti akhale ndi malo ochulukirapo popanda kuonjezera chiopsezo chokumana ndi zothetsera zosatheka.
Nthawi zambiri, magawo asanu ndi atatu kapena kupitilira apo amafunikira kuti apeze masanjidwe abwino kwambiri ndi masinthidwe kuti akwaniritse magwiridwe antchito.Kugwiritsa ntchito ndege zabwino komanso ndege zamagetsi pama board a multilayer kungachepetsenso ma radiation.
● Makonzedwe a zigawo
Makonzedwe a mkuwa wosanjikiza ndi insulating wosanjikiza kupanga dera kumapanga kuphatikizika kwa PCB ntchito.Kupewa PCB warping, m`pofunika kuti mtanda gawo la bolodi symmetrical ndi moyenera pamene kuyala zigawo.Mwachitsanzo, mu bolodi la magawo asanu ndi atatu, makulidwe a gawo lachiwiri ndi lachisanu ndi chiwiri ayenera kukhala ofanana kuti akwaniritse bwino.
Chingwe cholumikizira chiyenera kukhala choyandikana ndi ndege nthawi zonse, pomwe ndege yamagetsi ndi ndege yabwino zimalumikizidwa pamodzi.Ndikwabwino kugwiritsa ntchito ndege zingapo zapansi, chifukwa nthawi zambiri zimachepetsa ma radiation komanso kutsitsa pansi.
● Mtundu wa zinthu zosanjikiza
The matenthedwe, makina, ndi magetsi katundu gawo lililonse ndi mmene amachitira ndi zofunika kusankha PCB laminate zipangizo.
Gulu lozungulira nthawi zambiri limapangidwa ndi galasi lolimba la fiber substrate pachimake, lomwe limapereka makulidwe ndi kukhazikika kwa PCB.Ma PCB ena osinthika amatha kupangidwa ndi mapulasitiki osinthasintha kutentha kwambiri.
Pamwamba pake ndi chojambula chopyapyala chopangidwa ndi zojambulazo zamkuwa zomwe zimamangiriridwa pa bolodi.Mkuwa umakhalapo mbali zonse za PCB yokhala ndi mbali ziwiri, ndipo makulidwe amkuwa amasiyanasiyana malinga ndi kuchuluka kwa zigawo za PCB.
Phimbani pamwamba pa zojambulazo zamkuwa ndi chigoba cha solder kuti zizindikiro za mkuwa zigwirizane ndi zitsulo zina.Izi ndizofunikira kuti zithandize ogwiritsa ntchito kupewa kugulitsa malo olondola a mawaya odumphira.
Chophimba chosindikizira chophimba chimagwiritsidwa ntchito pa solder chigoba kuwonjezera zizindikiro, manambala ndi makalata kuti atsogolere msonkhano ndi kulola anthu kumvetsetsa bwino gulu la dera.
● Dziwani mawaya ndi pobowola
Okonza amayenera kuyendetsa zizindikiro zothamanga kwambiri pamtunda wapakati pakati pa zigawo.Izi zimathandiza kuti ndege yapansi ipereke chitetezo chomwe chili ndi ma radiation omwe amachokera panjanji pa liwiro lalikulu.
Kuyika kwa mlingo wa chizindikiro pafupi ndi mlingo wa ndege kumapangitsa kuti kubwereranso kukuyenda mu ndege yoyandikana nayo, motero kuchepetsa njira yobwereranso inductance.Palibe mphamvu zokwanira pakati pa mphamvu zoyandikana ndi ndege zapansi kuti zipereke kutsika pansi pa 500 MHz pogwiritsa ntchito njira zomangira.
● Mpata pakati pa zigawo
Chifukwa cha kuchepa kwa mphamvu, kugwirizana kolimba pakati pa chizindikiro ndi ndege yobwerera panopa n'kofunika kwambiri.Mphamvu ndi ndege zapansi ziyeneranso kugwirizanitsidwa mwamphamvu.
Zigawo zazizindikiro ziyenera kukhala zoyandikana nthawi zonse ngakhale zitakhala mu ndege zoyandikana.Kulumikizana kolimba ndi kusiyana pakati pa zigawo ndizofunikira kuti ma siginecha asasokonezeke komanso magwiridwe antchito onse.
powombetsa mkota
Pali zosiyanasiyana multilayer PCB bolodi mapangidwe PCB stacking luso.Pamene zigawo zingapo zikukhudzidwa, njira yamagulu atatu yomwe imaganizira zamkati mwamkati ndi pamwamba iyenera kuphatikizidwa.Ndi mathamangitsidwe apamwamba a mabwalo amakono, makonzedwe a PCB mosamalitsa ayenera kuchitidwa kuti apititse patsogolo luso logawa ndikuchepetsa kusokoneza.PCB yopangidwa molakwika imatha kuchepetsa kufalikira kwa ma siginecha, kupangidwa, kutumiza mphamvu, komanso kudalirika kwanthawi yayitali.