Tšusumetso ea 4-layer circuit board board le layer spacepability ho lumellana le electromagnetic le ponts'o ea matšoao hangata e baka liphephetso tse kholo ho baenjiniere le baqapi.Ho sebetsana ka katleho le lintlha tsena ho bohlokoa ho netefatsa ts'ebetso e ntle le ts'ebetso e nepahetseng ea lisebelisoa tsa elektroniki.Ka poso ena ea blog, re tla tšohla mokhoa oa ho rarolla bothata ba phello ea li-wiring tsa li-circuit board tsa 4-layer le sebaka sa marang-rang mabapi le ho lumellana ha motlakase le botšepehi ba matšoao.
Ha ho tluoa mabapi le phello ea 4-layer circuit board routing mabapi le electromagnetic comppatibility (EMC) le ponts'o ea matšoao, e 'ngoe ea lintho tse tšoenyang haholo ke ho kopana ho ka bang teng.Crosstalk ke khokahanyo e sa batleheng ea matla a motlakase a motlakase lipakeng tsa mesaletsa kapa likarolo tse haufi tsa PCB, e bakang ho sotha le ho senyeha ha lets'oao.Ho koala sekheo hantle le sebaka se pakeng tsa mesaletsa ho ka fokotsa bothata bona haholo.
Ho ntlafatsa EMC le ho tšepahala ha matšoao, ho bohlokoa ho sebelisa software ea moralo e ka etsang papiso e nepahetseng le tlhahlobo.Ka ho sebelisa lisebelisoa tsa software tse joalo ka li-electromagnetic field solvers, baqapi ba ka lekola monyetla oa hore ho be le crosstalk libakeng tse fumanehang pele ba tsoela pele ka prototyping ea 'mele.Mokhoa ona o boloka nako, o fokotsa litšenyehelo, hape o ntlafatsa boleng ba moralo ka kakaretso.
Karolo e 'ngoe e lokelang ho nahanoa ke khetho ea lisebelisoa tsa PCB.Motsoako oa thepa e nepahetseng ea dielectric le botenya bo nepahetseng bo ka ama haholo boitšoaro ba motlakase oa PCB.Lisebelisoa tsa boleng bo holimo tse nang le tahlehelo e tlase ea dielectric le thepa e laoloang ea impedance li thusa ho matlafatsa sets'oants'o sa matšoao le ho fokotsa tlhahiso ea motlakase.
Ho feta moo, sebaka sa lera ka har'a boto ea potoloho ea 4-layer e ka ama EMC haholo le botšepehi ba matšoao.Ka nepo, sebaka se pakeng tsa likarolo tse haufi tsa PCB se lokela ho ntlafatsoa ho fokotsa tšitiso ea motlakase le ho netefatsa phatlalatso e nepahetseng ea lets'oao.Maemo a indasteri le litataiso tsa meralo li tlameha ho lateloa ha ho khethoa sebaka se nepahetseng sa lera bakeng sa ts'ebeliso e itseng.
Ho rarolla bothata bona, mekhoa e latelang e ka sebelisoa:
1. Ho bea karolo ka hloko:Ho bea karolo ka katleho ho thusa ho fokotsa crosstalk ho PCB.Ka ho beha likarolo ka leano, baqapi ba ka fokotsa bolelele ba matšoao a lebelo le phahameng le ho fokotsa tšitiso e ka bang teng ea motlakase.Mokhoa ona o bohlokoa haholo ha o sebetsana le likarolo tsa bohlokoa le lipotoloho tse hlokolosi.
2. Moralo oa lera la fatše:Ho finyella sebaka se tiileng sa mobu ke theknoloji ea bohlokoa ea ho laola EMC le ho ntlafatsa botšepehi ba matšoao.Sebaka sa fatše se sebetsa e le thebe, se fokotsa ho ata ha maqhubu a motlakase le ho thibela tšitiso lipakeng tsa mesaletsa e fapaneng ea matšoao.Ho bohlokoa ho etsa bonnete ba mekhoa e nepahetseng ea ho theola, ho kenyelletsa ho sebelisa li-vias tse ngata ho hokahanya lifofane tsa fatše ka mekhahlelo e fapaneng.
3. Moralo oa li-stackup tse ngata:Moralo o nepahetseng oa li-stackup o kenyelletsa ho khetha tatellano e nepahetseng ea lera bakeng sa lets'oao, fatše le matla.Li-stackups tse entsoeng ka hloko li thusa ho fihlella taolo e laolehileng, ho fokotsa ho fetelletsa litaba, le ho ntlafatsa ts'ebetso ea matšoao.Matšoao a lebelo le phahameng a ka tsamaisoa ka lera le ka hare ho qoba ho kena-kenana le mehloli e ka ntle.
Tsebo ea Capel ea ho ntlafatsa EMC le ponts'o ea sesupo:
Ka boiphihlelo ba lilemo tse 15, Capel e ntse e tsoela pele ho ntlafatsa lits'ebetso tsa eona tsa tlhahiso le ho sebelisa mahlale a tsoetseng pele ho ntlafatsa EMC le ponts'o ea matšoao.Lintlha tsa bohlokoa tsa Capel ke tse latelang:
- Patlisiso e batsi:Capel e tsetela lipatlisisong tse felletseng ho tseba mekhoa le liphephetso tse hlahang moralong oa PCB ho lula pele ho nako.
- Lisebelisoa tsa morao-rao:Capel e sebelisa lisebelisoa tsa morao-rao ho etsa li-PCB tse tenyetsehang le li-PCB tse thata-flex, ho netefatsa ho nepahala le boleng bo phahameng ka ho fetisisa.
- Litsebi tse nang le litsebo:Capel e na le sehlopha sa litsebi tse nang le phihlelo tse nang le tsebo e tebileng tšimong, tse fanang ka lintlha tsa bohlokoa le tšehetso bakeng sa ho ntlafatsa EMC le botšepehi ba matšoao.
Ka kakaretso
Ho utloisisa phello ea 4-layer board board routing le layer spacepacing mabapi le tšebelisano ea motlakase le botsitso ba matšoao ho bohlokoa molemong oa moralo o atlehileng oa lisebelisoa tsa elektroniki.Ka ho sebelisa papiso e tsoetseng pele, ho sebelisa thepa e nepahetseng, le ho kenya ts'ebetsong mekhoa e metle ea ho etsa moralo, baenjiniere ba ka hlōla mathata ana 'me ba netefatsa hore ts'ebetso ea PCB ka kakaretso le ho tšepahala.Ka phihlelo e pharaletseng le boitlamo ba ho etsa bokhabane, Capel e ntse e le molekane ea ka tšeptjoang ho hlōla mathata ana.Ka ho sebelisa mekhoa e atlehang ea ho hlophisa boto, ho thea le ho tsamaisa lipontšo, ha ba ntse ba sebelisa tsebo ea Capel, baqapi ba ka fokotsa EMI, ba matlafatsa botšepehi ba matšoao, le ho haha liboto tse tšepahalang le tse sebetsang hantle.
Nako ea poso: Oct-05-2023
Morao
