Thermal Memory Technology
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18
This article describes several aspects of technology for storing a two-dimensional thermal pattern using optical or electrical heating techniques. For each aspect to be described there is a sandwich structure of a transition-metal-oxide with conducting layers thereon and voltage source addressed by heat source and capable of storing and amplifying a thermal image. I. Storage of Two-Dimensional Thermal Pattern There are materials which at some temperature undergo a sharp change in resistivity. The transition-metal vanadium-oxide (VO2) is a useful example. The resistivity versus temperature characteristic of VO2 is indicated schematically in Fig. 1. (C. N. Rao, et al, Transition Metal Oxides, NSRDS-NBS49/1974.) Below the transition temperature the material behaves like a semiconductor, and above it like a metal.