Magneto-optic memory element
CA 1234916 A · Owner: Sharp Kabushiki Kaisha · Inventors: Katayama, Hiroyuki; Hirogane, Junji; Takahashi, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A magneto-optic memory element includes a GdTbFe recording layer sandwiched between a pair of transparent AlN dielectric layers. At least one of the pair of transparent AlN dielectric layers is extended to have a size larger than the GdTbFe recording layer whereby to cover, the peripheral edge of the GdTbFe recording layer thereby, protecting the GdTbFe recording layer from adverse effects of oxygen and moisture. An Al-Ni alloy reflection film is formed on one of the pair of transparent AIN dielectric layers in order to increase the apparent Kerr rotation angle produced by the magneto-optic memory element.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 5, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.