Ingqiqo ye Rhoqo Ibhodi yeeSekethe eziprintiweyo

Kwi-PCB ekhethekileyo ene-frequency ye-electromagnetic frequency, ngokuthetha ngokubanzi, i-frequency ephezulu inokuchazwa njenge-frequency ngaphezulu kwe-1GHz. Ukusebenza kwayo ngokomzimba, ukuchaneka kunye neeparitha zobugcisa ziphezulu kakhulu, kwaye zisetyenziswa ngokuqhelekileyo kwiinkqubo zokulwa nokungqubana kweemoto, iinkqubo zesathelayithi, iinkqubo zerediyo kunye nezinye iinkalo. Ixabiso liphezulu, ngokuqhelekileyo lijikeleze i-1.8 ye-yuan kwi-square centimeter nganye, malunga ne-18000 ye-yuan kwi-square meter nganye.
Iimpawu zeHF ibhodi yesekethe yebhodi
1. Iimfuno zokulawula i-impedance zingqongqo, kwaye ulawulo lobubanzi bomgca lungqongqo kakhulu. Ukunyamezela ngokubanzi malunga ne-2%.
2. Ngenxa yepleyiti ekhethekileyo, ukunamathela kwe-PTH ukufakwa kwethusi akukho phezulu. Kudla ngokuyimfuneko ukuba roughen vias kunye nemiphezulu ngoncedo lwezixhobo unyango plasma ukwandisa adhesion PTH ubhedu kunye solder ukumelana inki.
3. Ngaphambi kwe-welding yokuchasana, i-plate ayinakuchithwa, ngaphandle koko ukunamathela kuya kuba mbi kakhulu, kwaye kunokutshatyalaliswa kuphela nge-micro etching liquid.
4. Uninzi lwamacwecwe enziwe ngezinto ze-polytetrafluoroethylene. Kuya kubakho imiphetho emininzi erhabaxa xa isenziwa ngabasiki besiqhelo bokusila, ngoko ke kufuneka abasiki abakhethekileyo bokusila.
5. Ibhodi yesekethe ephezulu yibhodi yesekethe ekhethekileyo ene-electromagnetic frequency. Ngokuqhelekileyo, i-frequency ephezulu inokuchazwa njenge-frequency engaphezulu kwe-1GHz.

Ukusebenza kwayo ngokomzimba, ukuchaneka kunye neeparitha zobugcisa ziphezulu kakhulu, kwaye zisetyenziswa ngokuqhelekileyo kwiinkqubo zokulwa nokungqubana kweemoto, iinkqubo zesathelayithi, iinkqubo zerediyo kunye nezinye iinkalo.

Uhlahlelo oluneenkcukacha lweeparamitha zeBhodi ePhakamileyo
Ukuphindaphinda okuphezulu kwezixhobo zombane yindlela yophuhliso, ngakumbi ngophuhliso olukhulayo lothungelwano olungenazingcingo kunye nonxibelelwano lwesathelayithi, iimveliso zolwazi zihamba zisiya kwisantya esiphezulu kunye nesantya esiphezulu, kwaye iimveliso zonxibelelwano zisiya kumgangatho welizwi, ividiyo kunye nedatha yokuhanjiswa ngaphandle kwamacingo. ngomthamo omkhulu kunye nesantya esikhawulezayo. Ke ngoko, isizukulwana esitsha seemveliso sidinga i-baseboard ye-frequency ephezulu. Iimveliso zonxibelelwano ezifana neenkqubo zesathelayithi kunye nezikhululo ezisisiseko zokufumana iifowuni eziphathwayo kufuneka zisebenzise iibhodi zeesekethe eziphezulu. Kwiminyaka embalwa ezayo, inyanzelekile ukuba iphuhlise ngokukhawuleza, kwaye i-baseboard ye-frequency ephezulu iya kuba yimfuno enkulu.
(1) I-coefficient yokwandiswa kwe-thermal ye-high-frequency board board substrate kunye nefoyile yobhedu kufuneka ihambelane. Ukuba akunjalo, i-foil yobhedu iya kwahlulwa kwinkqubo yokutshintsha okubandayo kunye nokutshisa.
(2) I-substrate yebhodi yesiphaluka esiphezulu kufuneka ibe nokufunxa kwamanzi aphantsi, kwaye ukufunxa kwamanzi aphezulu kuya kubangela i-dielectric rhoqo kunye nelahleko ye-dielectric xa ichaphazeleka ngokufuma.
(3) I-dielectric constant (Dk) ye-high-frequency circuit board substrate kufuneka ibencinci kwaye izinzile. Ngokuqhelekileyo, encinci ingcono. Izinga lokudluliselwa kwesignali lichasene ngokungafaniyo nengcambu yesikwere se-dielectric constant of the material. Ukuguquguquka okuphezulu kwe-dielectric kulula ukubangela ukulibaziseka kokuhanjiswa komqondiso.
(4) Ilahleko ye-dielectric (Df) ye-high-frequency circuit board substrate imathiriyeli kufuneka ibe yincinci, echaphazela kakhulu umgangatho wokuhanjiswa komqondiso. Incinci ilahleko ye-dielectric kukuba, incinci ilahleko yesignali.
(5) Okunye ukuxhathisa ubushushu, ukuxhathisa imichiza, amandla empembelelo kunye namandla e-peequency ye-high-frequency circuit board substrate imathiriyeli kufuneka ilungile. Ngokuqhelekileyo, i-frequency ephezulu inokuchazwa njenge-frequency ngaphezulu kwe-1GHz. Okwangoku, i-substrate yebhodi yesekethe ye-high-frequency esetyenziswa kakhulu yi-fluorine dielectric substrate, efana ne-polytetrafluoroethylene (PTFE), ebizwa ngokuba yiTeflon kwaye idla ngokusetyenziswa ngaphezu kwe-5GHz. Ukongeza, i-FR-4 okanye i-PPO substrate ingasetyenziselwa iimveliso phakathi kwe-1GHz kunye ne-10GHz.

Okwangoku, i-epoxy resin, i-PPO resin kunye ne-fluoro resin zezona ntlobo zintathu eziphambili ze-high-frequency circuit board substrate materials, phakathi kwazo i-epoxy resin yeyona inexabiso eliphantsi, ngelixa i-fluoro resin ibiza kakhulu; Ukuthathela ingqalelo ukungaguquguquki kwe-dielectric, ilahleko ye-dielectric, ukufunxwa kwamanzi kunye neempawu zokuphindaphinda, i-fluororesin yeyona nto ilungileyo, ngelixa i-epoxy resin yeyona imbi. Xa ubuninzi besicelo semveliso bungaphezulu kwe-10GHz, kuphela iibhodi eziprintiweyo ze-fluororesin ezinokusetyenziswa. Ngokucacileyo, ukusebenza kwe-fluororesin i-high-frequency substrate iphezulu kakhulu kunezinye ii-substrates, kodwa iziphene zayo zilukhuni kunye ne-coefficient enkulu yokwandisa i-thermal ngaphezu kweendleko eziphezulu. I-polytetrafluoroethylene (PTFE), inani elikhulu lezinto ezingaphiliyo (ezifana ne-silica SiO2) okanye i-glass cloth isetyenziselwa ukuqinisa izinto zokuzalisa ukuphucula ukusebenza, ukwenzela ukuba kuphuculwe ukuqina kwezinto ezisisiseko kunye nokunciphisa ukwanda kwayo kwe-thermal.

Ukongezelela, ngenxa ye-inertia ye-molecular ye-PTFE resin ngokwayo, akulula ukudibanisa ne-foil yobhedu, ngoko ke kufuneka unyango olukhethekileyo lomphezulu kwi-interface kunye ne-foil yobhedu. Ngokwemigaqo yeendlela zonyango, i-chemical etching okanye i-plasma etching iqhutyelwa kumphezulu we-polytetrafluoroethylene ukwandisa uburhabaxa bomphezulu okanye ukongeza umaleko wefilimu encamathelayo phakathi kwefoyile yobhedu kunye ne-polytetrafluoroethylene resin ukuphucula ukunamathela, kodwa kunokuba nefuthe kwi-adhesion. ukusebenza okuphakathi. Ukuphuhliswa kwayo yonke i-fluorine esekelwe kwi-high-frequency board substrate ifuna intsebenziswano yababoneleli bempahla ekrwada, iiyunithi zophando, ababoneleli bezixhobo, abavelisi bePCB kunye nabavelisi bemveliso yonxibelelwano, Ukuze uhambisane nophuhliso olukhawulezayo ibhodi yesekethe High-Frequencykule ndawo.