Process for Contiguous Bubble Devices
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11
Typically, several masking levels are required in order to produce bubble devices using contiguous propagation elements. In the present process, the gold mask used as part of the ion implantation mask also functions as a conductor to carry current. This means that a separate, critically aligned mask is not required for fabrication of the transfer conductor. A complete bubble storage system is shown in the drawing. The conductor 10 used to define the ion implantation patterns is also the transfer conductor used to transfer bubble domains between the major loop and the various minor loops. The spacing between the major and minor loops is selected such that a common charged wall can be established across the spacing between the major and the minor loops. This common charged wall tends to elongate the bubble across the spacing.