Abstract
The device size-dependent resistive memory switching and improvement in the switching performance in a CMOS compatible W/TiN contact device is reported as compared to W/W, Al/TiN, and Ir/TiN contacts, due to oxygen-rich layer formation at the W/filament interface. A small device area of 0.15 × 0.15 μm 2 and interface between the electrodes has been observed from the transmission electron microscopy images. The fabricated small size devices have shown improved switching endurance with a small current compliance of 50 μA without separate forming process. The reactivity of electrode materials and its interface play an important role in obtaining the stable resistive switching behavior in W/TiN contact-formed W/TiOx/TiN structure. This device has shown long consecutive switching cycles (>103), read endurance of >105 times, good uniformity, and data retention of >10 4 s at 85 °C under low-current compliance of 50 μA.
| Original language | English |
|---|---|
| Article number | 6656876 |
| Pages (from-to) | 409-417 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Nanotechnology |
| Volume | 13 |
| Issue number | 3 |
| DOIs | |
| State | Published - 05 2014 |
Keywords
- Filament
- W/TiN contact
- memory
- resistive switching random access memory (RRAM)