Applications of Selective Ion Implantation to Magnetic Bubble Devies

Foreign and domestic accomplishments in magnetic bubble device technology

“…Additionally, this facility produced a Hall effect bubble detector capable of sensing bubbles and producing a signal output of 0.5 millivolt with a good 30 db signal-to-noise ratio. [9,33] Hitachi, as reported in the Conference proceedings, also overcame the "hard bubble" problem.…”

“…Other companies are producing magnetic bubble chips from the garnet formula Gd 5 Y 2>5 Ga Fe 4 12 , which is shown in the Figure 2(c) graph for the year 1974. [9,14,33] As a whole, it appears that garnets are used more now than other materials by various research facilities even though amorphous films appear to have greater potential in bubble density.…”

“…Ion implantation and permalloy research is being performed. [33] (c) Bubble detectors : Efficient Hall effect and magnetoresi stive bubble detectors have been developed. [33] (d)…”

“…[12,45] The following Japanese Each of these facilities is involved in a particular phase of the magnetic bubble technology; one researches garnets and another non-crystal alloys, while others concentrate on applications, packaging, and mass production techniques. [24,26,33,42,43,46] Garnet material research has been conduc 12 ) with low optical absorpt characteristics (up to 80 degrees of rotation Hitachi, lead (Pb) was added to the iron garn effects. Results indicated that Pb-substitut produced only half of the Faraday rotational material had shown.…”