1. Intshayelelo
Njengenyathelo elibalulekileyo kwinkqubo ye-SMT, ukufakelwa kwe-solder kwakhona kudlala indima ebalulekileyo ekumiseleni ukuthembeka kunye nobomi beemveliso ze-elektroniki. I-IPC-J-STD-020, ukuveliswa kwe-elektroniki yanamhlanje kufuna ulawulo lobushushu oluchanekileyo lwe-±5°C. Kumacandelo afana ne-elektroniki yeemoto (AEC-Q100) kunye ne-aerospace (MIL-STD-883), umgangatho wokutywina uchaphazela ngokuthe ngqo ukhuseleko kunye nokusebenza kwemveliso.
2. Imigaqo yeNkqubo kunye neeNqaku eziPhambili zoLawulo
Ukutshiza kwakhona kudala amalungu e-solder azinzileyo ngokusebenzisa iiprofayili zobushushu ezilawulwayo. Iiparameter eziphambili ziquka:
- ·Izinga lokuFudumeza: 1–3°C/s (ukuthintela ukutshiswa bubushushu)
- ·Ubushushu obuphezulu: 20–40°C ngaphezulu kweqondo lokunyibilika kwe-solder (ngesiqhelo yi-235–245°C kwi-SnAgCu)
- ·Ixesha Elingaphezulu KweLiquidus (TAL): Imizuzwana engama-30–90
- ·Izinga lokuPholisa: 1–4°C/s (ukuphucula isakhiwo se-solder joint)
3. Ukuphunyezwa koBugcisa obuPhambili
3.1 Ukuphucula iProfayili yoBushushu
- ·Isebenzisa iprofayili yobushushu ye-KIC enokubeka esweni ngexesha langempela ukusuka kwiitshaneli ezi-6 ukuya kwezi-12.
- ·Uqinisekisa umphezulu webhodi ΔT kwaye IXABISO .
- ·Izifundo ze-SMTA zibonisa ukuba iiprofayili zobushushu ezilungiselelwe kakuhle zinokunciphisa iziphene zokunyibilikisa nge-60% (Isikolo samabanga aphakamileyo, 2021).
3.2 Ulawulo lweMozulu
- ·Ukhuseleko lweNitrogen: I-2 Uxinzelelo Ingxelo yoPhando lukaHeller).
- ·Umoya oshushu ohamba ngeConvection: Ukuhamba komoya okulawulwayo (0.5–1.5 m/s) kuqinisekisa ukudluliselwa kobushushu okufanayo.
3.3 IiMetriki zokuSebenza kweZixhobo
| Uhlobo/Umzekelo | Iindawo zeXesha eliPhantsi | Ulawulo lweTemp Precision | Ukusetyenziswa kweNitrogen | Iimbonakalo |
|---|---|---|---|---|
| UHeller 1910 | 12 | ±1°C | 15m³/h | Umoya oshushu ojikeleza kabini |
| I-Rehm V9 | 10 | ±1.5°C | 12m³/h | Ukuphinda uphume kwi-vacuum |
| I-Jutuo JS-800 | 8 | ±2°C | 18m³/h | Ukupholisa okukrelekrele |
4. Inkqubo yoQinisekiso loMgangatho
4.1 Ukubeka iliso kwinkqubo
- ·Uhlalutyo lwe-SPC lwexesha langempela: I-CRP ≥ 1.33
- ·Ukuqinisekiswa kwakhona kweprofayili yobushushu: Rhoqo emva kweeyure ezi-4
- ·Ukuhlolwa kwe-X-ray: Iqinisekisa umgangatho wejoyinti yesolder nganye IPC-A-610 imigangatho
4.2 Ukuqinisekiswa kokuthembeka
- ·Ukujikeleza kobushushu: -40°C ukuya kwi-125°C, imijikelo eli-1000
- ·Ukungcangcazela koomatshini: Uvavanyo lwe-20–2000Hz, olune-axis ezi-3
- ·I-Metallography: Ubukhulu be-IMC (i-intermetallic compound) yi-2–5μm
5. Amatyala ezicelo zoshishino
- ·Izixhobo zombane zeemoto: Ihlangabezana nemigangatho yoxinzelelo lobushushu oluyi-3000-cycle.
- ·Izixhobo zonyango: Iqinisekiswe phantsi kwe-ISO 13485 ngokulandeleka kwenkqubo kunye nokuthembeka kwayo.
- ·Unxibelelwano lwe-5G: Iqinisekisa ukuthembeka kwesignali ngejiyometri yejoyinti yesolder elungiselelwe kakuhle kwiimodyuli ze-mmWave.
6. Isishwankathelo: Iziseko zokuSondeza kwakhona okuThembekileyo kakhulu
- ·Ulawulo oluchanekileyo lweprofayili yobushushu
- ·Ukusebenza kwezixhobo ezizinzileyo nezisebenzayo
- ·Ukubeka esweni umgangatho wenkqubo epheleleyo kunye nokuqinisekiswa kokuthembeka
Ngolawulo lwenkqubo olucwangcisiweyo, abavelisi banokufikelela kwisivuno sokunyibilikisa kwakhona kwe-≥99.9%, bafikelele kumanqanaba omgangatho kunye nokungaguquguquki aphambili kushishino.
Iireferensi
- 1.IPC-J-STD-020E, 2020
- 2. Iphepha eliMhlophe leZisombululo zeNkqubo zikaHeller, 2022
- 3. Iinkqubo zeSMTA zaMazwe ngaMazwe, 2021
- 4.MIL-STD-883H, 2019
- 5.AEC-Q100 Rev-H, 2014
