Ukukhethwa kwezinto ze-PCB ze-Ultrasound zeBanga lezonyango
Iinkqubo zokuthatha imifanekiso nge-ultrasound zifuna ukuhanjiswa kwesignali ngokuchanekileyo, ukusasazwa kwesignali rhoqo, ukuthembeka, kunye nokuhambelana kwezinto eziphilayo. Isiseko sezi nkqubo sixhomekeke kwi-PCB, kwaye ukukhetha izixhobo ezifanelekileyo kubalulekile ukuqinisekisa ukhuseleko, ukuchaneka, kunye nokusebenza kwexesha elide kwizicelo zonyango.
Kutheni Ukukhethwa Kwezinto Ezibalulekileyo Kwi-Medical Ultrasound PCBs?
Kwizicelo zenqanaba lezonyango, ingakumbi imifanekiso yokuxilonga, ii-PCB kufuneka:
- Xhasa ukuhanjiswa kwesignali yesandi esisebenza rhoqo (ngesiqhelo yi-20–100 MHz)
- Qinisekisa uzinzo lobushushu kunye nokulahleka okuphantsi kwesignali
- Sebenzisana nezinto ezihambelanayo ne-biocompatible okanye ezingeyotyhefu
- Gcina uzinzo olulinganayo ngexesha lokubulala iintsholongwane
- Ibonelela ngokuthembeka okuphezulu kwizixhobo zonyango ezincinci
Izinto ezisetyenziswa rhoqo kwi-Medical Ultrasound PCBs
1. IiLaminate eziQhelekileyo kakhulu
- Izixhobo: Rogers RO4350B, Taconic RF-35
- Iimpawu: Ukulahleka kwe-dielectric ephantsi (Df), i-dielectric constant ezinzileyo (Dk)
- Isicelo: Umaleko wesignali kwiibhodi zomqhubi we-transducer
2. I-FR-4 ene-Tg ephuculweyo
- Izixhobo: FR-4 Tg170+, S1000-2M
- Iimpawu: Ukusebenza kakuhle kobushushu, ixabiso liphantsi
- Isicelo: Iimodyuli zamandla, iibhodi zolawulo
3. I-Polyimide yeesekethe eziguquguqukayo
- Iimpawu: Ukuguquguquka okuphezulu, ukumelana nobushushu okugqwesileyo
- Isicelo: Izixhobo zokudibanisa iiprobe, izixhobo ze-ultrasound ezinokunxitywa
4. Iisubstrates zeCeramic
- Izixhobo: Al₂O₃ (alumina), AlN (aluminiyam nitride)
- Iimpawu: Ukuqhuba okushushu okungaqhelekanga, okusetyenziselwa uyilo oluncinci olunamandla aphezulu
- Isicelo: Iiphelo zangaphambili ze-ultrasound zokuxilonga eziphezulu
Izinto eziphambili ekufuneka uziqwalasele kuYilo
- Ulawulo oluQhelekileyo lweDielectric: Kubalulekile ukugcina isantya sesiginali kunye nokuhambelana kwe-impedance
- I-Lack Tangent (Df): I-Df esezantsi iqinisekisa ukucaca okungcono kwesiginali kunye nokuphazamiseka okuphantsi
- Ukufunxwa komswakama: Izixhobo ezifunxa amanzi kancinci ziyamelana nokuwohloka ngexesha lokubulala iintsholongwane
- Ukuthobela iRoHS kunye nokuHlangana kwezinto eziphilayo: Kufuneka ihlangabezane nemigaqo yezonyango efana neRoHS, REACH, kunye nemigangatho enxulumene ne-FDA
Ukukhetha izixhobo ze-PCB ezifanelekileyo kwizixhobo ze-ultrasound zenqanaba lezonyango kungaphezulu nje kwesigqibo sobunjineli—ngumbandela wokhuseleko lwesigulana kunye nokuchaneka kweklinikhi. Ukusebenzisana nomenzi we-PCB onamava oqhelene nemigangatho yezonyango kuqinisekisa ukuba imveliso yakho iyahlangabezana neemfuno zomthetho kunye nokusebenza.
