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 [1]. 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.

 

[1] 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

Tel: 301-975-5696

Fax: 301-975-3918

Email: nfredin@nist.gov

 

Is your mentor a Sigma Xi Member?  No