Aging sensors for on-chip metallization of integrated LDMOS transistors under cyclic thermo-mechanical stress
- LDMOS transistors in integrated power technologies are often subject to thermo-mechanical stress, which degrades the on-chip metallization and eventually leads to a short. This paper investigates small sense lines embedded in the LDMOS metallization. It will be shown that their resistance depends strongly on the stress cycle number. Thus, they can be used as aging sensors and predict impending failures. Different test structures have been investigated to identify promising layout configurations. Such sensors are key components for resilient systems that adaptively reduce stress to allow aggressive LDMOS scaling without increasing the risk of failure.
| Author of HS Reutlingen | Ritter, Matthias; Pfost, Martin |
|---|---|
| DOI: | https://doi.org/10.1016/j.microrel.2017.06.009 |
| ISSN: | 0026-2714 |
| Erschienen in: | Microelectronics reliability |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Journal article |
| Language: | English |
| Publication year: | 2017 |
| Tag: | LDMOS; aging sensor; metallization failure; on-chip metallization; resistance change; resistance peak; sense line; thermomechanical stress |
| Volume: | 76/77 |
| Page Number: | 5 |
| First Page: | 512 |
| Last Page: | 516 |
| DDC classes: | 620 Ingenieurwissenschaften und Maschinenbau |
| Open access?: | Nein |
| Licence (German): |  In Copyright - Urheberrechtlich geschützt |
