Ingabe ama-PCB anemvamisa ephezulu kanye nesivinini esikhulu ayahambisana nezinqubo ezijwayelekile ze-SMT?
Ukungqubuzana Phakathi Kobunjiniyela be-RF kanye Nokukhiqiza kwe-SMT
Ama-PCB anemvamisa ephezulu (HF) kanye nesivinini esikhulu (HS)—asetshenziswa kuma-transceiver e-5G, ukuxhumana kwesathelayithi, i-radar yezimoto, kanye namaseva anesivinini esikhulu—adinga ukunemba okungavamile ezintweni zokwakha, ukulawulwa kwe-impedance, kanye nobuqotho besignali.
Ngakho-ke, ingabe zingahlanganiswa ngokuthembekile emugqeni ojwayelekile we-SMT?
Impendulo emfushane: Yebo, kodwa ngezinqubo ezithile eziguquguqukayo. Nakhu okudingeka ukwazi.
Umehluko Obalulekile Phakathi kwama-PCB e-HF/HS namaBhodi Ajwayelekile e-FR-4
| Ipharamitha | I-HF/HS PCB | I-PCB ejwayelekile ye-FR-4 |
|---|---|---|
| Izinto Ezingaphansi Kwesakhiwo | Rogers, Taconic, Megtron6 | FR-4 |
| I-Dielectric Constant (Dk) | Okuphansi (≈2) | ~4.2–4.8 |
| Isici Sokushabalalisa (Df) | Okuphansi kakhulu (isb., 0.001) | Okuphakeme |
| Isivinini Sesignali | >10Gbps | |
| Ngobuchwepheshe | Uyimpumputhe/Ungcwatshwe | Umgodi odlulayo |
| Ukuqedwa Komphezulu | ENIG, ENEPIG, Ukucwiliswa Silver | I-HASL |
Izinselele Eziphezulu Ze-SMT Zama-PCB Nezixazululo ze-HF/HS
1. Ukuzwela Kokushisa
Ama-laminate asekelwe ku-PTFE akhula eduze kwe-Z-axis futhi ahlukana kalula.
- Sebenzisa iphrofayili yokugeleza kabusha elawulwayo (≤245°C ubuningi).
- Yehlisa ukushisa ukuze uvimbele ukushaqeka.
2. Ukuzinza kwe-Warpage kanye ne-Dimensional Instability
- Bhaka amabhodi kusengaphambili ku-105°C amahora angu-2-4.
- Sebenzisa izinto zokuthwala noma izinto zokulungisa ukuze ugcine izinto zithambile.
3. Ukuhambisana Kokuqedwa Komphezulu
- Fanisa ukunamathisela kwe-solder ekuqedeni kwe-ENIG/ENEPIG.
- Lawula umswakama; hlola amaphedi ngaphambi kokuphrinta.
4. Ukukhetha i-Stencil kanye ne-Namathisela
- Sebenzisa i-solder paste yohlobo lwesi-4 noma lwesi-5.
- Yenza i-SPI bese usebenzisa ama-step step ukuze uthole ukuphakama okungalingani kwezingxenye.
5. Ukuvikela kanye Nokumisa i-RF
- Faka isivikelo ngemuva kokugeleza kabusha.
- Sebenzisa i-soldering ekhethiwe noma i-epoxy eqhubayo ukuze ubambe phansi.
Ingabe Umugqa Ojwayelekile we-SMT Ungaphatha Lawa Mabhodi?
Yebo—uma uhlonyiswe ngamathuluzi afanele nabasebenzi abaqeqeshiwe:
- Ukugeleza kabusha kwe-nitrogen: Ivimbela i-oxidation.
- Ukuhlolwa kwe-X-ray: Kubalulekile ku-BGA kanye ne-QFN.
- I-AOI Ethuthukisiwe: Ithola ukushintsha okuncane kanye nokungabi nalutho.
- Ukugeleza kabusha kwe-vacuum: Kunciphisa izikhala kuma-thermal pad.
Lapho Ubuchwepheshe Bokuhlanganisa Bubaluleke Ngempela
- Amamojula e-antenna e-5G mmWave
- Amabhodi e-radar angu-77GHz (ezimoto)
- Izinhlelo zokubuyisela emuva ze-microwave
- Amasekethe e-LNA/PA ezindiza
- Amakhadi e-SerDes nama-transceiver e-AI/amaseva
Kungani Ukhetha Injabulo Egcwele Ecebile?
Injabulo Egcwele Ecebile ungumlingani we-EMS othembekile wezimakethe ezinokwethenjelwa kakhulu njengezokuxhumana, izindiza, kanye nezimoto. Sinikeza:
- I-SMT yeRogers, Megtron, Teflon, kanye nezinhlobo ezixubile
- Uchwepheshe we-BGA, QFN, kanye ne-mmWave IC soldering
- I-DFM yangaphakathi yamabhodi asheshayo
- Ukusekelwa kokugeleza kabusha ngokwezifiso kanye nokwesekwa kwe-fixture
Siyaqonda umehluko phakathi kokuhlanganiswa kwe-RF kanye ne-FR-4—futhi sakha ngokuvumelana nencazelo yakho yokusebenza.
