Field access method for bubble memories
AssigneeInternational Business Machines Corporation
InventorOtto Voegeli
Life of this patent
Estimating the term…
Abstract
Field access system for use in propagation of bubbles is disclosed. The field access system combines discrete drive elements with a continuous drive film. An example is a Permalloy overlay consisting of a continuous drive film with protruding T & I bars which function as drive elements. This overlay structure is spaced over a suitable bubble material. The drive film is in direct contact with the T & I drive elements so that exchange coupling exists between the drive film and the drive elements. Use of a continuous drive film allows for control of the drive elements by a closed flux magnetic circuit having low power consumption.
Claims14
A field access system for magnetic bubble domains comprising:
- a sheet of magnetic material in which bubble domains can exist,
- a drive film of magnetically soft material in spaced relationship with said sheet, and
- drive elements of magnetically soft material in contact with said drive film wherein said drive elements are driven through an exchange interaction with said drive film.
A field access system for magnetic bubble domains comprising:
- a sheet of magnetic material in which bubble domains can exist,
- a drive film of magnetically soft material in spaced relationship with said sheet,
- drive elements of magnetically soft material in contact with said drive film wherein said drive elements are driven through an exchange interaction with said drive film, and
- means for applying a magnetic field to said drive film.
A method of switching the magnetization of drive elements in a field access drive system for propagating bubbles in a sheet of magnetic material comprising the steps of:
- providing a drive film of magnetically soft material in contact with drive elements, said drive film being in spaced relationship to said sheet of magnetic material and
- applying a magnetic field to said drive film.
A field access system for magnetic bubble domains comprising:
- a sheet of magnetic material in which bubble domains can exist,
- a drive film of magnetically soft material in spaced relationship with said sheet,
- drive elements of magnetically soft material in contact with said drive film wherein said drive elements are driven through an exchange interaction with said drive film,
- means for applying a magnetic field to said drive film, and
- yoke means associated with said drive film.
Dependencies are inferred from the claim text.