The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 1977
Filed:
May. 29, 1975
James G Harper, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Magnetic bubble chips are packaged along with X, Y and Z magnetic field generating means. The package is comprised of a metal lead frame upon which a magnetic bubble chip such as a memory chip device is mounted. Connectors are utilized to connect terminal pads on the bubble memory device to selected lead frame conductors. The lead frame includes selectively positioned terminal conductors which provide exterior terminals for X and Y magnetic field generating coils. The lead frame is plastic encapsulated with the plastic being formed to completely seal the magnetic bubble chip and connectors while providing mechanical support channels for X and Y magnetic field coils. Openings are provided in the plastic within the channels parallel to the plane of the lead frame on opposite sides thereof exposing the selectively positioned conductors so that the coils are electrically connected to the lead frame terminal conductors. Permanent magnets are provided on either end of the structure and magnetic field spreading plates are provided over the top and bottom of the structure parallel to the plane of the lead frame to generate a constant Z magnetic field.