Tsebo ea Maqhubu a Phahameng Boto ea Lipotoloho e hatisitsoeng

Bakeng sa PCB e khethehileng e nang le maqhubu a phahameng a motlakase, ha re bua ka kakaretso, maqhubu a phahameng a ka hlalosoa e le maqhubu a fetang 1GHz. Ts’ebetso ea eona ea ‘mele, ho nepahala le litekanyetso tsa tekheniki li phahame haholo,’ me li sebelisoa hangata mekhoeng ea likoloi tse thibelang ho thulana, litsamaiso tsa sathelaete, litsamaiso tsa seea-le-moea le masimo a mang. Theko e phahame, hangata e ka ba li-yuan tse 1.8 ka lisenthimithara tse ka bang 18000 li-yuan ka mithara ea lisekoere.
Litšobotsi tsa HF boto ea potoloho ea boto
1. Litlhoko tsa taolo ea impedance li thata, ‘me taolo ea bophara ba mohala e thata haholo. Mamello e akaretsang ke hoo e ka bang 2%.
2. Ka lebaka la poleiti e khethehileng, ho khomarela ha PTH koporo ea koporo ha e phahame. Hangata ho hlokahala ho roughen vias le bokaholimo ka thuso ea plasma thepa ea kalafo ho eketsa adhesion tsa PTH koporo le solder hanyetsa enke.
3. Pele ho tjheseletsa ho hanyetsa, poleiti e ke ke ea theoha, ho seng joalo sekhomaretsi se tla fokola haholo, ‘me se ka senyeha feela ka mokelikeli oa micro etching.
4. Boholo ba lipoleiti li entsoe ka thepa ea polytetrafluoroethylene. Ho tla ba le likarolo tse ngata tse thata ha li etsoa ka li-cutter tse tloaelehileng tsa ho sila, kahoo ho hlokahala li-cutters tse khethehileng.
5. Boto ea potoloho e phahameng ke boto e khethehileng ea potoloho e nang le maqhubu a phahameng a motlakase. Ka kakaretso, maqhubu a phahameng a ka hlalosoa e le maqhubu a ka holimo ho 1GHz.

Ts’ebetso ea eona ea ‘mele, ho nepahala le litekanyetso tsa tekheniki li phahame haholo,’ me li sebelisoa hangata mekhoeng ea likoloi tse thibelang ho thulana, litsamaiso tsa sathelaete, litsamaiso tsa seea-le-moea le masimo a mang.

Tlhaloso e qaqileng ea li-parameter tsa High-Frequency Board
Maqhubu a phahameng a lisebelisoa tsa elektroniki ke mokhoa oa nts’etsopele, haholoholo ka nts’etsopele e ntseng e eketseha ea marang-rang a se nang mohala le likhokahano tsa sathelaete, lihlahisoa tsa tlhahisoleseling li ntse li lebile ka lebelo le phahameng le maqhubu a phahameng, ‘me lihlahisoa tsa puisano li ntse li lebile molemong oa maemo a lentsoe, video le data bakeng sa phetiso ea waelese. e nang le bokhoni bo boholo le lebelo le potlakileng. Ka hona, moloko o mocha oa lihlahisoa o hloka baseboard e phahameng-frequency. Lihlahisoa tsa puisano tse kang litsamaiso tsa sathelaete le liteishene tse amohelang mehala ea thekeng li tlameha ho sebelisa liboto tsa potoloho tse phahameng haholo. Lilemong tse ‘maloa tse tlang, e tlameha ho hola ka potlako,’ me board ea maqhubu a holimo e tla hlokahala haholo.
(1) Mocheso oa katoloso ea mocheso oa substrate ea boto ea potoloho e phahameng-frequency le foil ea koporo e tlameha ho lumellana. Haeba ho se joalo, foil ea koporo e tla aroloa nakong ea liphetoho tse batang le tse chesang.
(2) Substrate ea boto ea potoloho e phahameng e lokela ho ba le metsi a fokolang, ‘me ho kenngoa ha metsi a mangata ho tla baka tahlehelo ea dielectric le dielectric ha e ameha ka mongobo.
(3) The dielectric constant (Dk) ea high-frequency circuit board substrate e tlameha ho ba nyenyane le e tsitsitseng. Ha re bua ka kakaretso, tse nyane li betere. Sekhahla sa phetisetso ea lets’oao se fapana ka tsela e fapaneng le motso oa lisekoere oa “dielectric constant” ea thepa. High dielectric constant ho bonolo ho baka tieho ya phetiso ya matshwao.
(4) Tahlehelo ea dielectric (Df) ea thepa ea substrate ea boto ea potoloho e phahameng ea maqhubu e tlameha ho ba e nyane, e amang haholo boleng ba phetisetso ea mats’oao. E nyenyane tahlehelo ea dielectric ke, e nyenyane tahlehelo ea pontšo ke.
5 Ka kakaretso, maqhubu a phahameng a ka hlalosoa e le maqhubu a fetang 1GHz. Hajoale, substrate ea boto ea potoloho ea maqhubu a holimo e sebelisoang haholo ke fluorine dielectric substrate, joalo ka polytetrafluoroethylene (PTFE), eo hangata e bitsoang Teflon mme hangata e sebelisoa kaholimo ho 5GHz. Ntle le moo, substrate ea FR-4 kapa PPO e ka sebelisoa bakeng sa lihlahisoa lipakeng tsa 1GHz le 10GHz.

Hona joale, resin ea epoxy, PPO resin le fluoro resin ke mefuta e meraro e meholo ea lisebelisoa tsa substrate tsa boto ea potoloho e phahameng, tseo har’a tsona epoxy resin e leng theko e tlaase, athe fluoro resin eona e theko e boima ka ho fetisisa; Ha re nahana ka dielectric constant, tahlehelo ea dielectric, ho monya metsi le litšoaneleho tsa khafetsa, fluororesin ke eona e ntle ka ho fetisisa, athe epoxy resin eona e mpe ka ho fetisisa. Ha makhetlo a ts’ebeliso ea sehlahisoa a phahame ho feta 10GHz, ho ka sebelisoa liboto tse hatisitsoeng tsa fluororesin feela. Ho hlakile hore ts’ebetso ea fluororesin high-frequency substrate e phahame haholo ho feta ea li-substrate tse ling, empa mefokolo ea eona ke ho se tsitsisehe ho fokolang le coefficient e kholo ea ho atolosa mocheso ho phaella ho theko e phahameng. Bakeng sa polytetrafluoroethylene (PTFE), palo e kholo ea lintho tse sa pheleng (tse kang silica SiO2) kapa lesela la khalase li sebelisoa e le lisebelisoa tse matlafatsang tsa ho tlatsa ho ntlafatsa ts’ebetso, e le ho ntlafatsa ho tiea ha thepa ea motheo le ho fokotsa katoloso ea eona ea mocheso.

Ho phaella moo, ka lebaka la inertia ea molek’hule ea PTFE resin ka boeona, ha ho bonolo ho kopanya le foil ea koporo, kahoo phekolo e khethehileng ea holim’a metsi e hlokahalang bakeng sa sebopeho se nang le foil ea koporo. Mabapi le mekhoa ea phekolo, lik’hemik’hale tsa lik’hemik’hale kapa plasma etching li etsoa holim’a polytetrafluoroethylene ho eketsa mahlahahlaha kapa ho eketsa lesela la sekhomaretsi pakeng tsa foil ea koporo le resin ea polytetrafluoroethylene ho ntlafatsa ho khomarela, empa ho ka ba le tšusumetso ho tshebetso e mahareng. Nts’etsopele ea substrate eohle ea fluorine e thehiloeng ho maqhubu a phahameng e hloka tšebelisano ‘moho le bafani ba thepa e tala, litsi tsa lipatlisiso, barekisi ba lisebelisoa, baetsi ba PCB le baetsi ba lihlahisoa tsa puisano, E le ho tsamaisana le nts’etsopele e potlakileng ea Boto ea potoloho ea High-Frequencys tšimong ena.