Technical Library | 2023-01-17 17:27:13.0
Reflow profile has significant impact on solder joint performance because it influences wetting and microstructure of the solder joint. The degree of wetting, the microstructure (in particular the intermetallic layer), and the inherent strength of the solder all factor into the reliability of the solder joint. This paper presents experimental results on the effect of reflow profile on both 63%Sn 37%Pb (SnPb) and 96.5%Sn 3.0%Ag 0.5%Cu (SAC 305) solder joint shear force. Specifically, the effect of the reflow peak temperature and time above solder liquidus temperature are studied. Nine reflow profiles for SAC 305 and nine reflow profiles for SnPb have been developed with three levels of peak temperature (230 o C, 240 o C, and 250 o C for SAC 305; and 195 o C, 205 o C, and 215 o C for SnPb) and three levels of time above solder liquidus temperature (30 sec., 60 sec., and 90 sec.). The shear force data of four different sizes of chip resistors (1206, 0805, 0603, and 0402) are compared across the different profiles. The shear force of the resistors is measured at time 0 (right after assembly). The fracture surfaces have been studied using a scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS)
Industry News | 2020-11-03 18:16:39.0
2020 Global Surface Mount Technology Company Of The Year Award (Soldering Equipment)
Industry News | 2023-10-18 17:43:18.0
HELLER's High UPH Vacuum Reflow Oven clinched the coveted "Step-by-Step Excellence Awards" - Innovation Award owing to its industry-leading product strength and outstanding performance.
Industry News | 2019-12-09 14:44:26.0
The SMT Reflow Soldering Equipment (Global) award was awarded to Heller Industries by Frost & Sullivan.
Industry News | 2003-07-02 08:54:26.0
A novel unreinforced, thermally conductive, pressure sensitive adhesive tape delivers very high bond strength to low-energy surfaces.
New Equipment | Cleaning Equipment
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New Equipment | Cleaning Equipment
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Parts & Supplies | Pick and Place/Feeders
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The SMTA membership is a network of professionals who build skills, share practical experience and develop solutions in electronic assembly technologies and related business operations.
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