A surface temperature limit detector using nematic liquid crystals with an application to microcircuits
- 1 August 1974
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 7 (8), 641-643
- https://doi.org/10.1088/0022-3735/7/8/016
Abstract
A novel technique has been developed permitting the detection of surface temperatures in excess of a well defined threshold value within the range 25-300 degrees C. The technique utilizes the change in optical state of a thin film of liquid nematogen at a critical temperature and can be used for any smooth horizontal surface to which a thin film of liquid nematogen can be applied and which can be uniformly illuminated with polarized light. The technique has been applied to microcircuits where the temperature sensitivity and spatial resolution have been demonstrated to be better than 0.5 degrees C and 5 mu m respectively.Keywords
This publication has 3 references indexed in Scilit:
- Liquid crystalsPhysics Bulletin, 1972
- Low electrooptic threshold in new liquid crystalsProceedings of the IEEE, 1972
- Liquid Crystals in Nondestructive TestingApplied Optics, 1968