An Ultralow Stress Ta4B Absorber for X-Ray Masks
- 1 December 1997
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 36 (12S)
- https://doi.org/10.1143/jjap.36.7586
Abstract
The stress controllability, stress uniformity, stress stability and dry etching characteristics of Ta4B films deposited by an in-line type sputtering system were investigated in detail. Low average stress Ta4B films within ±10 MPa have been fabricated on polished SiC films that demonstrate excellent reproducibility by step annealing. Stress uniformity of the film showed an approximate range of 7 MPa on a Si wafer in a 30 mm square area when the deposition conditions were modified. The Ta4B film demonstrated long-term stress stability and excellent resistance to the acid and water used in the cleaning process. The Ta4B film also ensures fine pattern formations below 0.2 µ m.Keywords
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