Na li-PCB tse nang le maqhubu a phahameng le tse lebelo le phahameng li lumellana le mekhoa e tloaelehileng ea SMT?
Khohlano Pakeng tsa Boenjiniere ba RF le Tlhahiso ea SMT
Li-PCB tsa maqhubu a phahameng (HF) le lebelo le phahameng (HS)—tse sebelisoang li-transceiver tsa 5G, puisano ea sathelaete, radar ea likoloi le li-server tsa lebelo le phahameng—li hloka ho nepahala ho ikhethang thepa, taolo ea impedance, le botšepehi ba lets'oao.
Kahoo, na li ka kopanngoa ka mokhoa o tšepahalang moleng o tloaelehileng oa SMT?
Karabo e khutšoanyane: E, empa ka mekhoa e itseng ea ho ikamahanya le maemo. Mona ke seo u hlokang ho se tseba.
Liphapang tsa Bohlokoa Pakeng tsa Li-PCB tsa HF/HS le Liboto tsa Standard FR-4
| Paramethara | PCB ea HF/HS | PCB e tloaelehileng ea FR-4 |
|---|---|---|
| Lisebelisoa tsa Substrate | Rogers, Taconic, Megtron6 | FR-4 |
| Dielectric Constant (Dk) | Tlase (≈2) | ~4.2–4.8 |
| Ntlha ea ho Hasana (Df) | Tekanyo e tlase haholo (mohlala, 0.001) | E phahameng |
| Lebelo la Pontšo | >10Gbps | |
| Ka Theknoloji | Lifofu/Li patiloe | Lesoba le phunyeletsang |
| Qetello ea Bokaholimo | ENIG, ENEPIG, Silivera ea ho qoelisoa | HASL |
Liphephetso tse Hloahloa tsa SMT bakeng sa Li-PCB le Litharollo tsa HF/HS
1. Kutloisiso ea Thermal
Li-laminate tse thehiloeng ho PTFE li atoloha ho latela Z-axis 'me lia arohana habonolo.
- Sebelisa profaele e laoloang ea phallo e ncha (≤245°C max).
- Butle-butle futhumatsa pele ho thibela ho tshoha.
2. Ho se tsitse ha leqephe le ho se tsitse ha litekanyo
- Beha liboto esale pele ho 105°C ka lihora tse 2-4.
- Sebelisa lisebelisoa kapa lijari ho boloka li bataletse.
3. Ho lumellana ha Bokaholimo ba Qetello
- Bapisa peista ea solder ho ENIG/ENEPIG e qeta.
- Laola mongobo; hlahloba di-pad pele o di printa.
4. Khetho ea Penteile le Peista
- Sebelisa peista ea solder ea Mofuta oa 4 kapa oa 5.
- Etsa SPI 'me u sebelise li-stencil tsa mehato bakeng sa bophahamo bo sa lekanang ba likarolo.
5. RF e Sireletsang le ho Theolela Mobu
- Kenya tšireletso kamora ho phalla hape.
- Sebelisa ho kopanya ka ho khetheha kapa epoxy e tsamaisang motlakase bakeng sa ho thella fatše.
Na Mohala o Tloaelehileng oa SMT o ka Tšoara Liboto Tsena?
E—haeba o na le disebediswa tse nepahetseng le basebetsi ba koetlisitsweng:
- Phallo ea naetrojene hape: E thibela oxidation.
- Tlhahlobo ea X-ray: E bohlokoa bakeng sa BGA le QFN.
- AOI e Tsoetseng Pele: E lemoha liphetoho tse nyane le likheo.
- Phallo ea lephaka hape: E fokotsa likheo tse ka har'a li-pad tsa thermal.
Ha Tsebo ea Kopano e le ea Bohlokoa Hakaale
- Li-module tsa antenna tsa 5G mmWave
- Mapolanka a radar a 77GHz (likoloi)
- Sistimi ea ho khutlisetsa morao ea microwave
- Lipotoloho tsa LNA/PA lifofaneng
- Likarete tsa SerDes le transceiver bakeng sa AI/li-server
Ke Hobane'ng ha U Lokela ho Khetha Thabo e Feletseng e Ruileng?
Thabo e Felletseng e Ruileng ke molekane ea tšepahalang oa EMS bakeng sa limmaraka tse tšepahalang haholo tse kang tsa mehala ea puisano, tsa lifofane le tsa likoloi. Re fana ka:
- SMT bakeng sa Rogers, Megtron, Teflon, le mefuta e nyalisitsoeng
- Setsebi sa ho kopanya BGA, QFN, le mmWave IC
- DFM ea ka tlung bakeng sa liboto tse lebelo le phahameng
- Tšehetso ea ho nchafatsa le ho lokisa lintho ka mokhoa o ikhethileng
Re utloisisa phapang pakeng tsa kopano ea RF le FR-4—'me re haha ho latela litlhaloso tsa hau tsa ts'ebetso.
