Masiku ano, chizolowezi chopanga zinthu zamagetsi chochulukirapo chimafuna mapangidwe azithunzi zitatu za Multilayer PCB. Komabe, kusanjikiza kosanjikiza kumadzutsa mavuto atsopano okhudzana ndi kapangidwe kameneka. Limodzi mwamavuto ndikupanga okwera kwambiri kuti agwire ntchitoyi.

Stacking PCBS ikukhala yofunikira kwambiri chifukwa ma circuits osindikizidwa ochulukirapo amapangidwa ndi zigawo zingapo.

Kapangidwe kabwino ka PCB kofunikira ndikofunikira kuti muchepetse mphamvu ya ma PCB ndi madera omwe amagwirizana nawo. M’malo mwake, zomangamanga zoyipa zitha kukulitsa kwambiri ma radiation, omwe ndi owopsa chifukwa cha chitetezo.

Ndi PCB stacking ndi chiyani?

The PCB lamination layers the insulation and copper of the PCB before the final layout design is completed. Kupanga stacking yothandiza ndi njira yovuta. A PCB amalumikiza mphamvu ndi zizindikilo pakati pazida zakuthupi, ndikuyika koyenera kwa bolodi kumakhudza momwe ntchitoyo imagwirira ntchito.

Chifukwa PCB lamination?

Kukulitsa PCB lamination ndikofunikira pakupanga matabwa oyenera. Lamination ya PCB ili ndi maubwino ambiri chifukwa mawonekedwe angapo amathandizira kugawa mphamvu, amateteza kusokonezedwa ndi ma elekitiroma, amalepheretsa kulowererapo, ndikuthandizira kufalitsa ma signal othamanga kwambiri.

Ngakhale cholinga chachikulu chodzaza ndi kukhazikitsa ma circuits angapo amagetsi pa bolodi limodzi kudzera m’magawo angapo, kapangidwe ka PCB kamaperekanso zabwino zina zofunika. Izi zikuphatikizapo kuchepetsa kusatekeseka kwa bolodi loyendetsa phokoso lakunja ndikuchepetsa crosstalk ndi zovuta zamaimidwe pamachitidwe othamanga kwambiri.

Kupaka pcb kwabwino kwa PCB kumathandizanso kuwonetsetsa kuti mitengo yomaliza yomanga ndi yotsika. Lamination ya PCB imatha kupulumutsa nthawi ndi ndalama pakukweza magwiridwe antchito komanso kukonza magwiridwe antchito amagetsi mu ntchito yonse.

Chithunzi chojambula: pixabay

Zolemba ndi malamulo a kapangidwe ka PCB

Chiwerengero chotsika

Mitundu yosavuta imatha kuphatikizira zigawo zinayi za PCBS, pomwe matabwa ovuta amafunikira akatswiri kuti azitsatira mosiyanasiyana. Ngakhale ndizovuta kwambiri, milingo yayitali imalola okonza malo ambiri kutakata popanda kuwonjezera chiopsezo chokumana ndi mayankho osatheka.

Nthawi zambiri, malo asanu ndi atatu kapena kupitilira apo amafunika kuti akwaniritse masanjidwe oyenera ndi mipata yolimbitsa magwiridwe antchito. Magetsi amathanso kuchepetsedwa pogwiritsa ntchito ndege yayikulu komanso ndege yamagetsi yamagetsi yamagetsi yama multilayer.

Wosanjikiza wotsika

Kukhazikitsidwa kwa zigawo zamkuwa ndi zotchingira zomwe zimapanga dera limapanga ntchito yofanana ya PCB. Pofuna kupewa kubowola kwa PCB, pangani gawo loyenda mozungulira mothandizirana pokonza zigawozo. Mwachitsanzo, m’magawo asanu ndi atatu, gawo lachiwiri ndi lachisanu ndi chiwiri liyenera kufanana pakulimba kuti likwaniritse bwino.

Chizindikiro chachizindikiro nthawi zonse chimayenera kukhala moyandikana ndi ndegeyo, pomwe magetsi ndi ndege zazikulu zimalumikizidwa mwamphamvu. It is best to use multiple grounding layers as they usually reduce radiation and ground impedance.

● Mtundu wazinthu zosanjikiza

Kutentha, makina, ndi magetsi a gawo lililonse ndi momwe amathandizirana ndizofunikira posankha zisankho za PCB.

Bungwe loyendetsa dera nthawi zambiri limapangidwa ndi cholimba cholimba cha fiberglass, chomwe chimapereka makulidwe ndi kukhazikika kwa PCB. Ma PCBS ena osinthika amatha kupangidwa ndi mapulasitiki otentha otentha.

Zosanjikiza pamwamba ndi chojambula chochepa kwambiri chopangidwa ndi zojambulazo zamkuwa zomangirizidwa pa bolodi. Mkuwa ulipo mbali zonse ziwiri za PCB ziwiri, ndipo makulidwe amkuwa amasiyanasiyana malinga ndi kuchuluka kwa zigawo za PCB.

The top of the copper foil is covered with a blocking layer to make the copper trace in contact with other metals. Izi ndizofunikira kuthandiza ogwiritsa ntchito kupewa kuwotcherera zolumpha pamalo oyenera.

Chosanjikiza chosindikiza chimagwiritsidwa ntchito pa chosanjikiza cha solder kuti muwonjezere zizindikilo, manambala ndi zilembo kuti musonkhane mosavuta ndikumvetsetsa bwino bolodi.

● Sankhani zolumikizira komanso kudzera m’mabowo

Okonza amayenera kuyendetsa zikwangwani zothamanga kwambiri pakati pazigawo zapakatikati. Izi zimathandiza kuti ndege yapansi ipereke chishango chomwe chimakhala ndi ma radiation ochokera ku mphambano liwiro lalikulu.

Kukhazikitsidwa kwa mulingo woyandikira pafupi ndi mulingo wa ndege kumalola kuti kubwereranso kukuyenda pa ndege zoyandikana, motero kumachepetsa njira yobwererera. Palibe capacitance yokwanira pakati pamagetsi oyandikira ndi malo osanjikiza kuti athe kuwongolera pansi pa 500 MHz pogwiritsa ntchito njira zomanga.

● Kutalikirana pakati pa zigawo

Momwe capacitance imachepa, kulumikizana kolimba pakati pa siginecha ndi ndege yomwe ikubwerera ndikofunikira. Mphamvu ndi nthaka iyeneranso kulumikizidwa mwamphamvu.

Magawo azizindikiro nthawi zonse amayenera kukhala oyandikana ngakhale atakhala moyandikira ndege. Tight coupling and spacing between layers is critical for uninterrupted signaling and overall functionality.

mapeto

Teknoloji ya lamination ya PCB Pali mapangidwe osiyanasiyana a PCB osiyanasiyana. Pakakhala magawo angapo, njira YOTSATIRA MITU YAWIRI yomwe imawona momwe mkati mwake ndi mawonekedwe ake akuyenera kuphatikizidwira. Ndikuthamanga kwambiri kwa madera amakono, kusungunula kwa PCB mosamala kuyenera kuchitidwa kuti zikwaniritse magawidwe ndikuchepetsa kusokonekera. PCBS yopangidwa molakwika imatha kuchepetsa kufalikira kwa ma siginolo, zokolola, kufalitsa mphamvu, komanso kudalirika kwakanthawi.