Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Magnetic Bubble Package

IP.com Disclosure Number: IPCOM000053069D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Horowitz, P: AUTHOR [+2]

Abstract

This article describes a full-access coil form for a magnetic bubble package. The magnetic bubble package consists of a coil form for drive field and orthogonal coils oriented to permit core access at opposite ends. By winding coils 11 and 12 at a 45 degree angle with respect to the longitudinal axis 13 of the bobbin form 14, openings are created at opposite ends 15 and 16 of the coil structure. The forward opening 15 facilitates insertion of a bubble domain device/carrier 17, while opening 16 accommodates a connector plug 18 that provides all necessary electrical functions on device/carrier and coil leads.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 57% of the total text.

Page 1 of 2

Magnetic Bubble Package

This article describes a full-access coil form for a magnetic bubble package. The magnetic bubble package consists of a coil form for drive field and orthogonal coils oriented to permit core access at opposite ends. By winding coils 11 and 12 at a 45 degree angle with respect to the longitudinal axis 13 of the bobbin form 14, openings are created at opposite ends 15 and 16 of the coil structure. The forward opening 15 facilitates insertion of a bubble domain device/carrier 17, while opening 16 accommodates a connector plug 18 that provides all necessary electrical functions on device/carrier and coil leads.

In addition, accommodation for conductive foils 19 is provided on opposing faces of the bobbin shank and beneath the coil overlap area. The foils can be positioned in recesses, thus increasing the area of sufficient rotating magnetic field uniformity.

Further, winding nearly an equal number of turns for each coil, the area of sufficient rotating magnetic field uniformity is well suited to a single device or a plurality of devices as in a square chip array. Similarly, the coils can be well matched in terms of inductance, resistance, and oersteds of drive field per ampere of drive current. Because the coils are electrically well matched, identical coil drivers may be used. The heating effects are minimized by the open nature of the final assembly and the enhanced cooling provided by unique design of the bobbin form in which convection cur...