Thesis supervisor: Bálint Károly Medgyes
Location of studies (in Hungarian): Elektronikai Technológia Tanszék Abbreviation of location of studies: ETT
Description of the research topic:
"Nowadays, because of the keen competition in the electronic industry, customer requirements must be ranked first. Therefore, it is increasingly important to ensure the reliability and quality of electrical devices by using cost-effective technologies. Depending on the applications, the requirements of customers are different, but all of them would like to know whether the lifetime, quality and reliability of the devices will meet their requirements. One of the most dangerous reliability problems is the electrochemical migration (ECM). The common characteristics of the ECM phenomenon include the presence of moisture on conductor-dielectric-conductor systems under bias voltage, the electrochemical process and the metallic dendrite growth. This process is driven by an applied electric field from the anode to the cathode. Dendrite growth occurs as a result of metal ions being dissolved into a solution. These escape from the anode and are deposited at the cathode, growing in needle- or tree-like formations. This effect cause short-circuits in the electronic circuits, which may lead to a catastrophic failure.
Tasks:
1. Review the literature of ECM (open questions, contradictory statements).
2. Investigation and qualification of ECM on various solder alloys, surface finishes used in electronics. Research of qualification methods; characterize the properties of the
ECM with quantitative parameters. In-depth investigation of ECM
processes, researching the possibilities of in-situ measurements methods. Investigation and modelling of ECM
processes in case of different (ionic) contaminations, focusing also on the water layer formation processes.
3. Evaluate results and discussion (theoretical background and control measurements).
4. Publication in peer-reviewed journal papers (with IF).
"
Required language skills: Angol Number of students who can be accepted: 1
Deadline for application: 2023-01-10
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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