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- W2123653893 abstract "Chip scale packages (CSPs) are now widely used for many electronic applications including portable electronics, telecommunications, and automotive assemblies. Assemblers of these types of devices are looking for solutions that both decrease cost and increase reliability. Underfilling CSPs is known to increase the reliability of these devices. This process can be costly in materials, capital equipment, and process time. This paper presents an alternate solution, bonding the CSP at the corners and edges. This process is used to increase the reliability of CSP devices with respect to shock and vibration. The corner bonding material examined in this study can be dispensed prior to reflow along side the solder paste onto the substrate and cured during the reflow process. This paper will discuss the processing aspects and the reliability of the bonded device. Processing parameters to be discussed are the maximum displacement that allows self-alignment, the optimum placement of the corner bond material on packages with corner bumps will be presented, and dot diameter and heights. The second half of the paper discusses the reliability performance of the material in comparison with several traditional underfill materials. Reliability testing included performing drop testing and thermal cycling (-55/spl deg/C to +125/spl deg/C) on test vehicles. These studies were conducted are several sizes of components from a 35 mm/spl times/35 mm, 1.27 mm pitch, PBGA down to a 6 mm/spl times/8 mm, 0.75 mm microBGA." @default.
- W2123653893 created "2016-06-24" @default.
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- W2123653893 date "2004-05-06" @default.
- W2123653893 modified "2023-09-26" @default.
- W2123653893 title "Processing and reliability of corner bonded CSPs" @default.
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- W2123653893 doi "https://doi.org/10.1109/iemt.2003.1225917" @default.
- W2123653893 hasPublicationYear "2004" @default.
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