ELECTRO-OPTICAL MATRIX DISPLAY.
Abstract
As part of research on ferro-magnetics with applications to new memory and display devices , a workable electrooptical display is being fabricated using the magnetic properties of RIS 1 thin films and the Bitter powder pattern technique. A monotonic increase of domain spacing with thickness of thin film was shown for 86/14 Ni/Fe films evaporated at 200 C onto no. 3 Corning glass substrates. The thickness must be above a few thousand Angstroms to obtain RIS 1 properties and good display intensity. Increasing the film thickness decreases the field strength required for switching but leads to less brilliant display images. For Ni/Fe films the magnetostriction constant must be negative to yield film elements useful for the display specified, but the applied fields required to cause film magnetization increase as the Ni concentration increases. Best display elements appear to be Ni/Fe films with Ni at 83 to 86% and thicknesses between 5000 and 10,000 Angstrons; coercive forces would be 10 oersteds for these films. Good glass-to-glass seals with enclosed Bitter Solution was obtained with a mixture of CIBA polyamide and epoxy resins.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1964
- Accession Number
- AD0608563