Uluhlu lokuHlola iiTaboos zoYilo lwePCB oluQhelekileyo

Kwihlabathi ledijithali lanamhlanje elikhawulezayo, iibhodi zeesekethe eziprintiweyo eziphindaphindayo (ii-PCB) zisisiseko sobuchwepheshe obuphambili obufana nonxibelelwano lwe-5G, ukuhamba ngesathelayithi, iinkqubo zeradar, ikhompyutha esebenza kakhulu, kunye ne-elektroniki yabathengi ephezulu. Umgangatho woyilo lwe-PCB oluphindaphindayo uchaphazela ngokuthe ngqo uzinzo, ukusebenza kakuhle, kunye nokuthembeka kwenkqubo yonke ye-elektroniki.

Kwiinjineli zoyilo lwe-PCB, ukuqonda imigaqo yoyilo lwe-RF PCB kunye nokuphepha iimpazamo ezibalulekileyo zoyilo kubalulekile. Eli nqaku lingena kwiingxaki zoyilo lwe-PCB ezixhaphakileyo, lichaza izizathu kunye nemiphumo yazo, kwaye ligxininisa umahluko omkhulu wokusebenza phakathi koyilo oluphezulu nolungasebenzi kakuhle.

1, Iingxaki zoYilo lweNdlela

✕ Ukungayinaki iCharacteristic Impedance Matching

Ukuhanjiswa kwesignali kwii-PCB ezisebenzisa i-frequency ephezulu kufuna ulawulo oluqinileyo lwe-impedance, oluhlala lungaphakathi kwe-±5% yamaxabiso ekujoliswe kuwo afana ne-50Ω okanye i-75Ω. Ukungaqwalaseli ububanzi be-trace, isithuba, ubukhulu be-dielectric, kunye nezinto ze-Dk kunokubangela ukungaqhubeki kwe-impedance, okubangela oku kulandelayo:

● Ukubonakaliswa kwesignali
● Ukuguqulwa kwesimo samaza
● Isantya sempazamo yebhithi esonyukileyo
● Ukuncitshiswa okukhulu kwesignali
Umzekelo, kwizikhululo zesiseko ze-5G, ukungafani kwe-impedance kukhokelela ekulahlekelweni kwepakethi yedatha, unxibelelwano olubuthathaka, kunye namava amabi omsebenzisi. Sebenzisa izixhobo zokulinganisa i-electromagnetic ukubala i-impedance ngokuchanekileyo, kwaye soloko ucinga ngokunyamezelana kwemveliso kunye nokuxhomekeka kwi-stackup.

✕ I-Topology yeNdlela Embi

Izigqibo ezingalunganga zokuhambisa indlela—ezifana nemikhondo emide kakhulu, emxinwa, okanye exineneyo—zinokubangela:

● Ukulibaziseka kunye nokulahleka kwesignali ngenxa yobude obugqithisileyo
● Ukumelana okuphezulu kunye nobushushu obuvela kwiindlela ezimxinwa
● Ukuphazamiseka kwengxoxo phakathi kwemigca ekufutshane
Landela imigangatho yoyilo efana nale:
● OKULANDELAYO ● I-FEXT Kwi-interfaces ezinesantya esiphezulu (i-USB 3.0, i-HDMI), ukufanisa i-tight differential pair (±5mil) kunye neendlela ze-routing ezilungiselelweyo zibalulekile ekugcineni ukuthembeka kwesignali.

2, Iingxaki zoYilo lweSakhiwo seStackup

✕ Ukubalwa Kweeleya Ezingacwangciswanga Nokukhethwa Kwezinto Ezisetyenzisiweyo
Inani leeleya kufuneka libonise ubunzima beesekethe kunye neemfuno zokuzahlula. Iileya ezingaphezulu zinyusa ubunzima beendleko kunye nokucubungula; iileya ezimbalwa kakhulu zithintela isignali kunye nocwangciso lwamandla.

Musa ukuyekelela ekukhetheni izinto: sebenzisa izinto ezisetyenziswa rhoqo njenge IRogers RO4350B kunye:

● I-constant ye-dielectric ephantsi (Dk)
● Into ephantsi yokusasazeka (Df)
Ukusebenzisa i-FR4 eqhelekileyo okanye ii-substrates ezingafanelekanga kwi-mmWave PCBs (24–52GHz) kukhokelela koku:

● Ukulahleka okukhulu kwesiginali
● Ukungazinzi kwe-Impedance
● Ukusebenza okunciphileyo kokudluliselwa kwedatha

✕ Ukungahoyi iimfuno zobhaliso lwe-Interlayer kunye ne-Lamination

Ukungalingani kwee-interlayer > ±50μm kunokubangela ii-shorts, ii-open circuits, kunye nokungaphumeleli kokusebenza. I-lamination engalunganga ikhokelela kwi:

● Ukususwa kwe-delamination
● Ukubonakaliswa kwesignali
● Ukungazinzi koomatshini
Abayili kufuneka basebenzisane ngokusondeleyo nabavelisi, bechaza:
● Ubushushu bokulayina: 180–220°C
● Uxinzelelo: 5–10MPa
● Ubude bexesha: imizuzu engama-30–60
● Ibhalansi yekopolo kunye nee-stackups ezilinganayo ukunciphisa uxinzelelo

3, Iingxaki zoYilo lweVia kunye nePad

✕ Usebenzisa Uhlobo kunye nobungakanani obungalunganga kwiiSignali eziQhelekileyo

Ukukhetha imingxuma edlulayo endaweni yee-vias ezingaboniyo okanye ezingcwatyiweyo kwandisa i-parasitic inductance/capacitance, okubangela:

● Ukulibaziseka kwesignali
● Ukuguqulwa kwendlela
● Ukucamngca kwiitshaneli ezikhawulezayo
Kwakhona, kuphephe ukuba ncinci kakhulu nge-diameters (● Ukungalungelelani kakuhle kwe-drill
● Ukungafakwa kakuhle kwepleyiti
● Ukumelana okuphezulu
Ukukhetha okufanelekileyo kuphucula ukuthembeka kwesiginali kunye nokuveliswa kwayo.

✕ Ukungayinaki iPadi yoYilo kunye nokuhambelana kwayo neSoldering

Iipadi kufuneka zenzelwe indlela yokunyibilikisa ecetywayo:
● Ukuphinda kufakwe i-soldering kufuna ubungakanani obuchanekileyo bephedi ukuze kumanziswe
● Ukutywina kwamaza kufuna isithuba ukuze kuthintelwe ukubhidlika
Ukugqitywa komphezulu okufana ne-ENIG (i-Electroless Nickel Immersion Gold) kuphucula ukunyibilika kunye nokumelana ne-oxidation. Uyilo olubi lwephedi okanye ukugqitywa kwayo kubangela oku:
● Amalunga abandayo
● Ukudibanisa i-solder
● Ukukhupha i-oxidation kunye neesekethe ezivulekileyo

4, Iziphene, Izizathu Eziphambili, kunye Nezikhewu Zomgangatho Woyilo

Iimpawu Eziqhelekileyo Zeziphene

● Ukunciphisa uphawu kunye nokuphazamiseka kwesimo samaza

● Ingxoxo phakathi kweempawu

● Ukwahlulwa kweeleya kunye neesekethe ezimfutshane

● Ukuqhekeka kwe-trace, ngokuvaleka, okanye ukunyibilikiswa kwe-pad

Izizathu Eziphambili

● Ukungalingani kwe-impedance kwiindlela zokubala ezingalunganga

● Ukukhetha izinto ezinganelanga kwiifrikhwensi zeRF

● Ucwangciso olubi lwe-stackup ngaphandle kokulungelelaniswa kwenkqubo

● Ayithathelwa ngqalelo ngenxa yezinambuzane kunye nokunyamezelana kokubhola

● Ubukhulu bephedi abuhambelani nenkqubo yokutshiza

Uthelekiso lweSikhewu soYilo

5, Uvuyo Olupheleleyo Olutyebileyo Lunokujongana Nazo Zonke Iingxaki

Zonke iziphene zoyilo—ukusuka ekungahambelani kwe-impedance kunye nokuthetha ngokulandelelana ukuya ekusileleni kwe-stackup kunye nokungalungi koyilo—zinokuphazamisa ukusebenza kwe-RF PCB. KwiRich Full Joy, iinjineli zethu ze-RF kunye neengcali zokuvelisa zisebenza ngaxeshanye ukuze:

● Ukuqinisekisa ukuba uyilo lwemveliso luyahambelana nemigaqo yoyilo
● Sebenzisa izixhobo zokulinganisa ze-EM eziphambili
● Sebenzisa ubuchule bezinto ezisetyenziswa rhoqo
● Nika uyilo olulungele imveliso olunemveliso eninzi
Nokuba kungenxa yezikhululo ze-5G base, iinkqubo ze-radar, okanye unxibelelwano lwesathelayithi, siqinisekisa ukuba i-PCB yakho esebenza rhoqo isebenza ngesantya, ukuthembeka, kunye nokuthembeka.

6, Iqabane Elinovuyo Olupheleleyo Olutyebileyo: Uyilo Olukrelekrele Kakhulu, Yenza Ngcono

Ngamava e-RF PCB eminyaka emininzi, uRich Full Joy uye wafunda isayensi yokulawula isignali ye-high-frequency. Sidibanisa uyilo oluqhutywa kukulingisa, isayensi yezinto, kunye nokuveliswa okuphucukileyo ukwenza ii-PCB ezidlula umgangatho onzima kunye nemilinganiselo yokusebenza.

Silandele ukuze ufumane ulwazi oluthe kratya malunga neengcali, okanye uqhagamshelane nathi ukuze sixoxe ngeprojekthi yakho elandelayo eqhutywa rhoqo!