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- W3040391909 abstract "Copper alloys are widely used as a leadframe (chip carrier) material in plastic packaged semiconductor devices. The oxidation of Cu leadframes during the assembly process can result in poor adhesion between the moulding compound and the die-pad. This often leads to interfacial delamination and contributes to popcorn cracking during the component-board attachment process. The main cause of poor adhesion has been attributed to the weak Cu oxide(s) layer on the leadframe surface. Studies have shown that the moulding compound/leadframe adhesion decreases with increasing oxide thickness. The aim of this investigation is to give a detailed analysis of the phase formation of a CuNiSi alloy during oxidation and to identify the locus of failure for the interfacial delamination. The Cu leadframes were oxidized in an air oven at 240° C for up to 200 min exposures before encapsulation. A scanning acoustic microscope was used to locate delamination regions along the moulding compound/leadframe interface." @default.
- W3040391909 created "2020-07-10" @default.
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- W3040391909 date "2000-08-01" @default.
- W3040391909 modified "2023-09-25" @default.
- W3040391909 title "A Copper Leadframe Oxidation Investigation by Electron Energy-Loss Spectroscopy" @default.
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- W3040391909 doi "https://doi.org/10.1017/s1431927600037995" @default.
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