Title: DIRECTING THE SELF-ASSEMBLY OF BLOCK COPOLYMER THIN FILMS BY COLD ZONE ANNEALING
Nathaniel J. Fredin, Brian C. Berry, Kevin G. Yager, and Ronald L. Jones
Affiliation: Polymers Division, NIST Gaithersburg, MD 20899.
The development of methods that permit control over the long-range order and orientation of microdomains in block copolymer (BCP) films is an important obstacle to implementing “bottom-up” approaches to template surface patterns for applications in microelectronics and data storage devices, such as hard disk drives. Berry et al. recently developed a new technique for manipulating BCP order and orientation, termed cold zone annealing (CZA), in which a BCP film is processed via moving thermal gradients . CZA lends itself to combination with other approaches, such as chemical or topographic substrate patterning. We report a very high degree of alignment of BCP microdomains in zone annealed films deposited on substrates topographically patterned with channels of varying widths. Neutron reflectivity experiments suggest that a temperature gradient in the direction normal to the film surface plays an important role in CZA but is not solely responsible for the high degree of order.
 B. C. Berry, A. W. Bosse, J. F. Douglas, R. L. Jones, and A. Karim, Nano Letters, 7, 2789 (2007)
CATEGORY: Materials (but please place me in the morning session)
Mentors Name: Ronald L. Jones
Polymers Division, MSEL
Room B230, Building 224, Mail Stop 8541
Is your mentor a Sigma Xi Member? No