Analytic Model Verification of the Interfacial Friction Power in Al us w/w Bonding on Au Pads
| Autor: | Herbert Reichl, H Gaul, Martin Schneider-Ramelow |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 2010 |
| Předmět: |
Wire bonding
Materials science business.product_category business.industry Shear force Wedge bonding Welding Structural engineering Wedge (mechanical device) Electronic Optical and Magnetic Materials law.invention Vibration Amplitude law von Mises yield criterion Electrical and Electronic Engineering Composite material business |
| Zdroj: | IEEE Transactions on Components and Packaging Technologies. 33:607-613 |
| ISSN: | 1557-9972 1521-3331 |
| DOI: | 10.1109/tcapt.2010.2049847 |
| Popis: | To close the gap between the development of wire bonding equipment and the knowledge about the welding process itself, a friction power model is presented. The model can be used to calculate the welding quality of a wedge in dependence to the bonding and material parameters. Based on theories for Au ball/wedge bonding, the model is enhanced for us wedge/wedge (us w/w) bonding with aluminum wire. Therefore, the deformation of the wire is described by the von Mises stress, and the geometry changes due to the decreasing wedge height during bonding are taken into consideration. Furthermore, the paper introduces the minimum friction amplitude needed for any frictional cleaning of the interface and takes the precleaning during touchdown into consideration. To prove the model, four equations are highlighted to theoretically predict the shear force, the tool tip and pad amplitude, and the characteristic of the deformation during the us stage of w/w bonding. These magnitudes are measured for different bonding parameters while bonding 25 ?m AlSi-1 wire to Au metalized Si test structures. The model parameters were then fit to the experimental results for all bonding parameters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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