1. Isingeniso
Njengesinyathelo esibalulekile enkambisweni ye-SMT, ukugoqa kabusha kwe-solder kudlala indima ebalulekile ekunqumeni ukuthembeka kanye nesikhathi sokuphila kwemikhiqizo kagesi. I-IPC-J-STD-020, ukukhiqizwa kwe-elekthronikhi yesimanje kudinga ukunemba kokulawula izinga lokushisa okungu-±5°C. Emikhakheni efana ne-elekthronikhi yezimoto (AEC-Q100) kanye ne-aerospace (MIL-STD-883), ikhwalithi yokunamathisela ithinta ngqo ukuphepha komkhiqizo kanye nokusebenza kwawo.
2. Izimiso Zenqubo kanye Namaphuzu Abalulekile Okulawula
Ukushiswa kabusha kwakha amalunga okushiswa azinzile ngamaphrofayili okushisa alawulwayo. Amapharamitha abalulekile afaka:
- ·Izinga Lokushisa: 1–3°C/s (ukugwema ukushaqeka kokushisa)
- ·Izinga Lokushisa Eliphakeme: 20–40°C ngaphezu kwephuzu lokuncibilika kwe-solder (ngokuvamile 235–245°C ye-SnAgCu)
- ·Isikhathi Ngaphezulu kwe-Liquidus (TAL): Imizuzwana engama-30–90
- ·Izinga Lokupholisa: 1–4°C/s (ukulungisa isakhiwo esincane sejoyinti le-solder)
3. Ukuqaliswa Okubalulekile Kobuchwepheshe
3.1 Ukuthuthukisa Iphrofayili Yokushisa
- ·Isebenzisa iphrofayili yokushisa ye-KIC enokuqapha kwangempela kweziteshi ezingu-6–12.
- ·Iqinisekisa ubuso bebhodi ΔT futhi INTENGO .
- ·Izifundo ze-SMTA zibonisa ukuthi amaphrofayili okushisa alungiselelwe kahle anganciphisa amaphutha okugoqa ngo-60% (Isikole Samabanga Aphezulu, 2021).
3.2 Ukulawulwa Komoya
- ·Ukuvikelwa kwe-nitrogen: I-THE2 Ukuhlushwa okungaphansi kuka-1000ppm kwandisa ukumanzika ngaphezu kuka-15% (Umbiko Wocwaningo lwe-Heller).
- ·Umoya Oshisayo Ohambayo: Ukugeleza komoya okulawulwayo (0.5–1.5 m/s) kuqinisekisa ukudluliselwa kokushisa okufanayo.
3.3 Izilinganiso Zokusebenza Kwemishini
| Umkhiqizo/Imodeli | Izindawo Zezinga Lokushisa | Ukunemba Kokulawula Izinga Lokushisa | Ukusetshenziswa kwe-nitrogen | Izici |
|---|---|---|---|---|
| UHeller 1910 | 12 | ±1°C | 15m³/h | Umoya oshisayo ojikeleza kabili |
| I-Rehm V9 | 10 | ±1.5°C | 12m³/h | Ukugeleza kabusha kwe-vacuum |
| I-Jutuo JS-800 | 8 | ±2°C | 18m³/h | Ukupholisa okuhlakaniphile |
4. Uhlelo Lokuqinisekisa Ikhwalithi
4.1 Ukuqapha Inqubo
- ·Ukuhlaziywa kwe-SPC kwesikhathi sangempela: I-CRP ≥ 1.33
- ·Ukuqinisekiswa kabusha kwephrofayili yokushisa: Njalo emahoreni ama-4
- ·Ukuhlolwa kwe-X-ray: Iqinisekisa ikhwalithi yejoyinti ye-solder ngayinye I-IPC-A-610 amazinga
4.2 Ukuqinisekiswa Kokuthembeka
- ·Ukujikeleza Kwezinga Lokushisa: -40°C kuya ku-125°C, imijikelezo eyi-1000
- ·Ukudlidliza Kwemishini: Ukuhlolwa kwe-20–2000Hz, okungu-3-axis
- ·I-Metallography: Ubukhulu be-IMC (i-intermetallic compound) 2–5μm
5. Amacala Okusebenza Kwemboni
- ·Izimoto zikagesi: Ihlangabezana nezindinganiso zokucindezeleka kokushisa kwama-cycle angu-3000.
- ·Amadivayisi Ezokwelapha: Kuqinisekiswe ngaphansi kwe-ISO 13485 ngokulandeleka kwenqubo kanye nokuthembeka kwayo.
- ·Ukuxhumana kwe-5G: Iqinisekisa ubuqotho besignali nge-geometry yejoyinti ye-solder elungiselelwe kahle yamamojula e-mmWave.
6. Isifinyezo: Izisekelo Zokugoqa Okuphinde Kuthembeke Kakhulu
- ·Ukulawula iphrofayili yokushisa okunembile
- ·Ukusebenza kwemishini okuzinzile nokusebenzayo
- ·Ukuqapha ikhwalithi yenqubo ephelele kanye nokuqinisekiswa kokuthembeka
Ngokulawulwa kwenqubo okuhlelekile, abakhiqizi bangafinyelela isivuno sokugoqa kabusha okungu-≥99.9%, bafinyelele amazinga ekhwalithi nokuvumelana okuhamba phambili embonini.
Izinkomba
- 1.IPC-J-STD-020E, 2020
- 2. Iphepha Elimhlophe Lezixazululo Zenqubo Ye-Heller, 2022
- 3. Izinqubo Zamazwe Ngamazwe ze-SMTA, 2021
- 4.MIL-STD-883H, 2019
- 5.AEC-Q100 Rev-H, 2014
