Design of combinatorial shadow masks for complete ternary-phase diagramming of solid state materials.
We report on a novel mask design for the combinatorial synthesis of a ternary composition spreads library, which allows such libraries to be deposited through a series of simple masks on a rotatable mount. This eliminates the use of complicated actuation of a heated substrate. In our configuration, this design leads to a standard linear phase diagram by varying the growth rate of each constituent nearly linearly from 0 to 100% at a triangular area on the substrate. Film growth occurs as a series of cycles in which one molecular layer of the material is deposited over the entire area of the spread by a synchronization of the mask movement, target exchange, and laser pulses. The technique has been applied to the synthesis of photoluminescent TbCa(4)O(BO(3))(3)-ScCa(4)O(BO(3))(3)-PrCa(4)O(BO(3))(3), demonstrating its value for the mapping of direct relationship between composition and the light-emitting property.
Takahashi
R
R
Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuda-tyo, Midori-ku, Yokohama 226-8502, Japan. takahashi@oxide.msl.titech.ac.jp
Kubota
H
H
Murakami
M
M
Yamamoto
Y
Y
Matsumoto
Y
Y
Koinuma
H
H