New metallurgical systems for electronic soldering applications
| Autor: | Elvira Fortunato, R Oppelt, Isabel M.P.L.V.O. Ferreira, T Harder, A.P Marvão, Rodrigo Martins, C Gonçalves, Jorge Ferreira, J.I. Martins |
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| Rok vydání: | 1999 |
| Předmět: |
Materials science
Metallurgy Metals and Alloys Intermetallic Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Reliability (semiconductor) Volume (thermodynamics) Soldering Phase (matter) Volume fraction Electrical and Electronic Engineering Instrumentation Diode Homologous temperature |
| Zdroj: | Sensors and Actuators A: Physical. 74:70-76 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/s0924-4247(98)00305-7 |
| Popis: | The aim of this paper is to present results on a new soldering process based on the low-temperature solidification of intermetallic phases from the system Cu–Sn–Cu which can be employed to form a heat-resistant die-attach as well as signal and power electric contacts. Because of the total transformation into intermetallic phase, the working temperature of the bond formed is several hundred degrees Celsius higher than the process temperature (around 250°C). This process leads to a homologous temperature T/Tm of about 0.3 compared to 0.7 in the case of soft SnAg solder alloy. Therefore a better reliability of the proposed bonding process is achievable. Results of the match of the predicted volume fraction of the intermetallic forms and the experimentally measured contact volume would be also discussed, for contacts formed in power diodes. |
| Databáze: | OpenAIRE |
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