Ese PCB zikoresha intera nini kandi zihuta cyane zihuye n'imikorere isanzwe ya SMT?
Ihuriro hagati y'Ubwubatsi bwa RF n'Ubucuruzi bwa SMT
PCB zifite umuvuduko mwinshi (HF) n'umuvuduko mwinshi (HS)—zikoreshwa muri transceivers za 5G, itumanaho rya satelite, radar y'imodoka, na seriveri zikoresha umuvuduko mwinshi—zikeneye ubuziranenge budasanzwe mu bikoresho, kugenzura impedance, no kurinda ibimenyetso.
None se, bishobora guteranywa neza ku murongo usanzwe wa SMT?
Igisubizo kigufi: Yego, ariko hamwe n'uburyo bwihariye bwo guhindura imikorere. Dore ibyo ukeneye kumenya.
Itandukaniro ry'ingenzi hagati ya HF/HS PCBs na Standard FR-4 Boards
| Igipimo | PCB ya HF/HS | PCB isanzwe ya FR-4 |
|---|---|---|
| Ibikoresho byo munsi y'ubutaka | Rogers, Taconic, Megtron6 | FR-4 |
| Dielectric Constant (Dk) | Hasi (≈2) | ~4.2–4.8 |
| Ikintu cyo gukwirakwiza (Df) | Hasi cyane (urugero, 0.001) | Hejuru |
| Umuvuduko w'ikimenyetso | >10Gbps | |
| Binyuze mu ikoranabuhanga | Impumyi/Yashyinguwe | Umwobo unyuramo |
| Kurangiza ubuso | ENIG, ENEPIG, Ifeza yibiza | HASL |
Ibibazo by'ingenzi bya SMT kuri HF/HS PCBs n'ibisubizo
1. Ubushyuhe butuma umuntu yumva neza
Laminate zishingiye kuri PTFE zirakura ku murongo wa Z kandi zigacikamo ibice byoroshye.
- Koresha imiterere igenzurwa yo kongera gusohora amazi (≤245°C ntarengwa).
- Shyushya buhoro buhoro kugira ngo wirinde guhungabana.
2. Kurwanya no kudahinduka kw'ibipimo
- Shyira ibibaho ku bushyuhe bwa 105°C mu gihe cy'amasaha 2-4.
- Koresha ibikoresho cyangwa ibikoresho byo gutwara kugira ngo bigumane ubugari.
3. Guhuza neza ubuso
- Huza kugurisha paste kuri ENIG / ENEPIG irangije.
- Genzura ubushuhe; genzura udupapuro mbere yo gucapa.
4. Guhitamo imashini n'udupira
- Koresha ubwoko bwa 4 cyangwa 5 bwa solder paste.
- Kora SPI kandi ukoreshe stencils z'intambwe ku burebure bw'ibice bingana.
5. Gukingira no Gutera Ubutaka ku mpande z'isi (RF)
- Shyiramo uburyo bwo gukingira nyuma yo kongera gusohora amazi.
- Koresha uburyo bwo gusora cyangwa epoxy iyobora amashanyarazi kugira ngo ushyire hasi.
Ese umurongo usanzwe wa SMT ushobora gukora kuri izi mbaho?
Yego—niba ufite ibikoresho bikwiye n'abakozi bahuguwe:
- Gusubirana kwa azote: Birinda ogisijeni.
- Isuzuma rya X-ray: Ni ngombwa kuri BGA na QFN.
- AOI igezweho: Imenya impinduka nto n'ubusa.
- Gusubiramo umwuka uvamo umwuka: Bigabanya icyuho mu bikoresho by'ubushyuhe.
Iyo ubuhanga mu guteranya ibintu bugira akamaro koko
- Module za antene za 5G mmWave
- Ibibaho bya radar bya 77GHz (imodoka)
- Sisitemu zo gusimbuza ibyuma bya mikoroonde
- Imiyoboro ya LNA/PA mu kirere
- SerDes na amakarita ya transceiver kuri AI/seriveri
Kuki wahitamo ibyishimo byuzuye?
Ibyishimo Byuzuye Bikungahaye ni umufatanyabikorwa wizewe wa EMS ku masoko yizewe cyane nka itumanaho, iby’indege, n’imodoka. Dutanga:
- SMT kuri Rogers, Megtron, Teflon, n'ibivange
- Impuguke mu gusoda IC ya BGA, QFN, na mmWave
- DFM yo mu nzu ku mbaho zihuta cyane
- Gusubizamo imiterere yihariye no gushyigikira ibikoresho
Dusobanukiwe itandukaniro riri hagati y’iteraniro rya RF na FR-4—kandi twubaka dukurikije imiterere y’imikorere yawe.
