Cov PCBs Uas Muaj Zaus Ntau Thiab Cov PCBs Uas Muaj Ceev Puas Sib Haum Nrog Cov Txheej Txheem SMT Txheem?
Kev Sib Tsoo Ntawm RF Engineering thiab SMT Manufacturing
Cov PCBs uas siv zaus siab (HF) thiab ceev ceev (HS)—siv rau hauv 5G transceivers, kev sib txuas lus satellite, radar tsheb, thiab cov servers ceev ceev—xav tau qhov tseeb tshwj xeeb hauv cov ntaub ntawv, kev tswj impedance, thiab kev ncaj ncees ntawm cov teeb liab.
Yog li, lawv puas tuaj yeem sib dhos tau zoo ntawm kab SMT txheem?
Cov lus teb luv luv: Yog, tab sis nrog rau kev hloov kho tshwj xeeb ntawm cov txheej txheem. Nov yog yam koj yuav tsum paub.
Cov Kev Txawv Tseem Ceeb Ntawm HF/HS PCBs thiab Cov Rooj Tswjhwm FR-4 Txheem
| Cov Qauv | HF/HS PCB | Tus qauv FR-4 PCB |
|---|---|---|
| Cov Khoom Siv Hauv Qab | Rogers, Taconic, Megtron6 | FR-4 |
| Dielectric Constant (Dk) | Qis (≈2) | ~4.2–4.8 |
| Qhov Cuam Tshuam ntawm Kev Tawg (Df) | Qis heev (piv txwv li, 0.001) | Siab dua |
| Kev Ceev ntawm Lub Teeb Liab | >10Gbps | |
| Los ntawm Kev Siv Tshuab | Dig Muag/Faus | Qhov Los Ntawm Qhov |
| Qhov Chaw Tiav | ENIG, ENEPIG, Immersion Silver | HASL |
Cov Kev Sib Tw SMT Sab Saum Toj rau HF/HS PCBs & Cov Kev daws teeb meem
1. Kev rhiab heev ntawm cua sov
PTFE-based laminates nthuav dav raws Z-axis thiab yooj yim delaminate.
- Siv cov profile tswj tau rov ua dua tshiab (≤245 ° C siab tshaj).
- Maj mam ua kom sov ua ntej kom tsis txhob poob siab.
2. Kev sib txhuam thiab kev tsis ruaj khov ntawm qhov ntev
- Ua ntej ci cov laug cam ntawm 105°C rau 2-4 teev.
- Siv cov khoom siv los yog cov nqa khoom kom tswj tau qhov tiaj tus.
3. Kev Sib Tw Qhov Chaw
- Match solder paste rau ENIG / ENEPIG tiav.
- Tswj cov av noo; tshuaj xyuas cov ntaub qhwv ua ntej luam ntawv.
4. Xaiv Stencil & Paste
- Siv hom 4 lossis 5 solder paste.
- Ua SPI thiab siv cov kauj ruam stencils rau qhov siab tsis sib npaug.
5. RF Tiv Thaiv & Av
- Nruab cov ntaub thaiv tom qab rov ua dua.
- Siv cov khoom siv soldering xaiv los yog cov epoxy conductive rau kev sib txuas hauv av.
Puas yog ib txoj kab SMT txheem tuaj yeem tuav cov laug cam no?
Yog—yog tias muaj cov cuab yeej siv thiab cov neeg ua haujlwm tau kawm tiav:
- Kev hloov pauv nitrogen: Tiv thaiv kev oxidation.
- Kev tshuaj xyuas X-ray: Qhov tseem ceeb rau BGA thiab QFN.
- AOI Qib Siab: Tshawb pom cov kev hloov me me thiab cov khoob.
- Lub tshuab nqus tsev rov ua dua tshiab: Txo cov voids hauv cov thermal pads.
Thaum Kev Txawj Ntse Sib Dhos Tseem Ceeb Tiag
- 5G mmWave antenna modules
- 77GHz radar boards (tsheb)
- Cov txheej txheem rov qab microwave
- LNA/PA circuits hauv aerospace
- Cov ntawv SerDes & cov ntawv transceiver rau AI/servers
Vim li cas ho xaiv Rich Full Joy?
Kev Xyiv Fab Tag Nrho yog tus khub EMS uas ntseeg siab rau kev lag luam muaj kev ntseeg siab xws li kev sib txuas lus, kev tsav dav hlau, thiab kev tsim kho tsheb. Peb muab:
- SMT rau Rogers, Megtron, Teflon, thiab hybrids
- Kev txawj ntse BGA, QFN, thiab mmWave IC soldering
- DFM hauv tsev rau cov laug cam ceev ceev
- Kev txhawb nqa reflow thiab fixture
Peb nkag siab txog qhov sib txawv ntawm RF thiab FR-4 sib dhos - thiab peb tsim rau koj qhov kev ua tau zoo.
