I-CCL (i-Copper Clad Laminate) kukuba ithathe indawo esecaleni kwi-PCB njengenqanaba lereferensi, uze uyigcwalise ngobhedu oluqinileyo, olukwabizwa ngokuba kukugalelwa kobhedu.
Ukubaluleka kwe-CCL njengokulandelayo:
- ukunciphisa i-impedance yomhlaba kunye nokuphucula amandla okuthintela ukuphazamiseka
- ukunciphisa ukuhla kwamandla ombane kunye nokuphucula ukusebenza kakuhle kwamandla
- idityaniswe phantsi kwaye inokunciphisa indawo yelophu.
Njengoko ikhonkco ebalulekileyo yoyilo PCB, kungakhathaliseki yasekhaya Qingyue Feng PCB uyilo software, kwakhona ezinye Protel angaphandle, PowerPCB baye babonelela umsebenzi ubhedu olukrelekrele, ngoko ke indlela yokusebenzisa ubhedu elungileyo, ndiya ukwabelana ezinye izimvo zam nawe, ngethemba lokuzisa. iinzuzo kushishino.
Ngoku ukuze wenze welding PCB kangangoko kunokwenzeka ngaphandle deformation, uninzi abavelisi PCB kwakhona kufuna umyili PCB ukugcwalisa indawo evulekileyo ye PCB ngobhedu okanye igridi-njengocingo emhlabeni. Ukuba i-CCL ayiphathwa kakuhle, oko kuya kukhokelela kwiziphumo ezibi ngakumbi . Ngaba i-CCL "ilungile ngaphezu kokwenzakalisa" okanye "imbi ngaphezu kokulungileyo"?
Ngaphantsi kwemeko ye-frequency ephezulu, iya kusebenza kwibhodi yesekethe eprintiweyo i-wiring capacitance, xa ubude bungaphezulu kwe-1/20 yomsindo ojikelezayo ohambelana ne-wavelength, ngoko unokuvelisa umphumo we-antenna, ingxolo iya kuqalisa nge-wiring, ukuba kukho i-CCL embi ye-CCL kwi-PCB, i-CCL yaba sisixhobo sokudlulisa ingxolo, ngoko ke, kwi-high frequency circuit, musa ukukholelwa ukuba ukuba udibanisa ucingo lomhlaba kwindawo ethile, lo ngu "mhlaba", Enyanisweni. , kufuneka ibe ngaphantsi kwesithuba se-λ/20, gqobhoza umngxuma kwi-cabling kunye ne-multilayer emhlabeni indiza "isekelwe kakuhle". Ukuba i-CCL iphathwa ngokufanelekileyo, ayikwazi ukwandisa kuphela okwangoku, kodwa iphinde idlale indima emibini yokuphazamiseka kokukhusela.
Zimbini iindlela ezisisiseko ze-CCL, ezizezi, indawo enkulu yokugquma ubhedu kunye ne-mesh copper, ehlala ibuzwa, yeyiphi eyona ilungileyo, kunzima ukuyithetha. Ngoba? Indawo enkulu ye-CCL, kunye nokwanda kwendima yangoku kunye nekhuselayo kabini, kodwa kukho indawo enkulu ye-CCL, ibhodi inokuthi ijike, nokuba i-bubble ukuba nge-soldering wave. Ngoko ke, ngokubanzi iya kuvula iindawo zokubeka ezimbalwa ukunciphisa Ubhedu olugqumayo, Umnatha we-CCL ukhusela ubukhulu becala, ukwandisa indima yangoku iyancitshiswa, Ngokwembono yokuchitha ubushushu, igridi ineenzuzo (inciphisa indawo yokufudumeza yobhedu) kwaye idlale indima ethile yokukhusela i-electromagnetic. Kodwa kufuneka kuphawulwe ukuba igridi yenziwa ngokutshintshwa kolwalathiso lokubaleka, siyazi ukuba ububanzi bomgca kububanzi bomsebenzi webhodi yesekethe inobude bayo "wombane" ohambelanayo (ubungakanani obuyinyani bahlulwe ngokusebenza rhoqo kwedijithali ehambelanayo. Ukuphindaphinda, iincwadi zekhonkrithi), xa i-frequency yokusebenza ayiphezulu, mhlawumbi indima yemigca yegridi ayibonakali, kanye nje ubude bombane kunye nokusebenza okulinganayo okuhambelanayo, kubi kakhulu, uya kufumanisa ukuba isiphaluka asiyi kusebenza kakuhle, Inkqubo yokuphazamiseka kophawu lokukhupha isebenza kuyo yonke indawo.Ngoko ke, kwabo basebenzisa igridi, ingcebiso yam kukukhetha ngokweemeko zokusebenza kuyilo lwebhodi yesekethe, kunokuba ubambelele kwinto enye.Ngoko ke, iimfuno zesekethe ezichasene nophazamiseko eziphakamileyo zesekethe yesekethe ephezulu Igridi yeenjongo ezininzi, isekethe ephantsi yamatyeli kunye nesekethe yangoku ephezulu kunye nolunye oluqhelekileyo olusetyenziswayo olupheleleyo lobhedu olwenziweyo.
Kwi-CCL, ukuze siyivumele ukuba ifezekise umphumo wethu olindelekileyo, ke imiba yeCCL kufuneka ithathele ingqalelo yeziphi iingxaki:
1. Ukuba umhlaba we-PCB ungaphezulu, ube ne-SGND, AGND, GND, njl., iya kuxhomekeka kwindawo yobuso bebhodi ye-PCB, ngokulandelelana ukwenza "umhlaba" oyintloko njengendawo yokubhekisela kwi-CCL ezimeleyo, kwidijithali kunye i-analog ukwahlula ubhedu, ngaphambi kokuvelisa i-CCL, okokuqala, iintambo zamandla ezihambelana nesibindi: 5.0 V, 3.3 V, njl., ngale ndlela, inani leemilo ezahlukeneyo zenziwa ubume be-deformation ngaphezulu.
2. Kwinqaku elinye lokudityaniswa kweendawo ezahlukeneyo, indlela yokudibanisa nge-0 ohm ukumelana okanye i-bead magnetic okanye inductance;
3. I-CCL kufuphi ne-crystal oscillator. I-crystal oscillator kwisekethe ngumthombo ophuma rhoqo. Indlela yokujikeleza i-crystal oscillator nge-copper cladding kwaye emva koko igubungele i-crystal oscillator ngokwahlukileyo.
4.Ingxaki yendawo efileyo, ukuba ivakalelwa kukuba inkulu kakhulu, yongeza umhlaba nge kuyo.
5. Ekuqaleni kwe-wiring, kufuneka iphathwe ngokulinganayo kwi-wiring yomhlaba, kufuneka sidibanise umhlaba kakuhle xa i-wiring, asikwazi ukuthembela ekudibaniseni i-vias xa igqityiwe i-CCL ukuphelisa isikhonkwane somhlaba soqhagamshelwano, esi siphumo sinzima kakhulu. embi.
6. Kungcono ukuba ungabi ne-Angle ebukhali ebhodini (=180 °), kuba ukusuka kwindawo yokujonga i-electromagnetism, oku kuya kwenza i-antenna yokudlulisa, ngoko ke ndincoma ukusebenzisa imida ye-arc.
7. I-Multilayer medium wiring spare area, musa ubhedu, kuba kunzima ukwenza i-CCL "igxininiswe"
8.intsimbi engaphakathi kwezixhobo, ezifana ne-radiator yensimbi, i-metal reinforcement strip, kufuneka ifezekise "isiseko esihle".
9.Ibhloko yensimbi yokupholisa ye-voltage ye-tatu-terminal stabilizer kunye nebhanti yokubeka yedwa phantsi kufuphi ne-crystal oscillator kufuneka isekelwe kakuhle. Ngelizwi: i-CCL kwi-PCB, ukuba ingxaki yokumisa iphathwa kakuhle, kufuneka ibe "ilungile ngaphezu kokubi", inokunciphisa indawo yokubuyisela umgca wesignali, ukunciphisa ukutshatyalaliswa kwe-electromagnetic yangaphandle.