Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 39, Pages 26119-26125Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b07181
Keywords
atomic layer deposition (ALD); ruthenium; TiN interface; reliability; beyond-Cu
Funding
- imec industrial affiliate program on nanointerconnects
- Innovation Fund Denmark
- Villum Foundation project [VKR023117]
- Villum Fonden [00007266] Funding Source: researchfish
Ask authors/readers for more resources
Atomic layer deposition of ruthenium is studied as a barrierless metallization solution for future sub-10 nm interconnect technology nodes. We demonstrate the void-free filling in sub-10 nm wide single damascene lines using an ALD process in combination with 2.5 angstrom of ALD TiN interface and po'stdeposition annealing. At such small dimensions, the ruthenium effective resistance depends less on the scaling than that of Cu/barrier systems. Ruthenium effective resistance potentially crosses the Cu curve at 14 and 10 nm according to the semiempirical interconnect resitance model for advanced technology nodes. These extremely scaled ruthenium lines show excellent electromigration behavior. Time-dependent dielectric breakdown measurements reveal negligible ruthenium ion drift into low-kappa dielectrics up to 200 degrees C, demonstrating that ruthenium can be used as a barrierless metallization in interconnects. These results indicate that ruthenium is highly promising as a replacement to Cu as the metallization solution for future technology nodes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available