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- All Subjects: chalcogenide
- All Subjects: pmc
- Creators: Gonzalez Velo, Yago
- Resource Type: Text
Description
Interposers have been used in the system packaging industry for years. They have advanced from basic devices used for connection to providing new opportunities for System-in-Package and System-on-Chip architectures. Currently interposers cannot be reconfigured. Systems may implement extra input-output connections for hard reconfiguration. However, programmable metallization cells (PMC) offer the opportunity to change this. PMCs offer reliable and fast switching that has the potential to be used as resistive memory cells as well. PMCs operate by growing a metal filament from the device cathode to its anode through a solid electrolyte by applying a voltage. By reversing the voltage bias, the filament will retract. The PMC’s electrolyte can also be made from a range of materials being chalcogen or oxide based, allowing for integration in a variety of systems. By utilizing PMCs in an interposer to create a “smart interposer,” it would be possible to create easily reconfigurable systems. This project investigated how PMCs function in a lab setting. By using a probe station, the current-voltage characteristics were generated for a variety of limiting current values. The PMC on and off state resistances were extrapolated for further understanding of its switch function. In addition, works-like prototypes were developed to show the function a smart interposer. In these prototypes, transistors or relays were used as the switching mechanism in place of the PMCs. The final works-like prototype demonstrated how a smart interposer might function by using a switching mechanism to swap between half adder and full adder outputs for the same inputs.
ContributorsSpiker, Bradley Dahlton (Author) / Kozicki, Michael (Thesis director) / Gonzalez Velo, Yago (Committee member) / Electrical Engineering Program (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
This research aims to investigate the material properties of various silver-doped germanium-chalcogenide thin films that novel lateral Programmable Metallization Cell (PMC) devices are based on. These devices are governed by a solid-state electrochemical reaction that is controlled electrically occurring at the micro and nanoscale.By using various electrical and optical characterization techniques, useful material characteristics such as the activation energy of electrodeposit growth rate and bandgap energy can be extracted. These parameters allow for better tuning of these materials for more specific PMC device applications, such as a timer that can be placed into integrated circuits for metering and anticounterfeiting purposes.
The compositions of focus are silver-doped germanium-selenide and germanium-sulfide variations; overall, the bandgap energy of these materials decreases as silver content is increased, the activation energy tends to be smaller in sulfide-based devices, and chalcogenides highly doped with silver exhibit nanocluster migration growth modes due to the agglomeration of silver clusters in the film.
ContributorsRicks, Amberly (Author) / Gonzalez Velo, Yago (Thesis advisor) / Kozicki, Michael N. (Thesis advisor) / Holman, Zachary (Committee member) / Arizona State University (Publisher)
Created2021