Glassing Technique for Ferrite Recording Heads
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
The glassing of ferrite heads involves a heating cycle during which the viscosity of the glass is decreased to the point where it will readily flow into the front and back gaps. In the present technique two small glass rods 1 and 2 are placed in each window 3. The rods are tacked with an adhesive, one in the front apex area 4, and the other in the back gap area 5. The ferrite sandwich 6 is glassed in a horizontal position to allow the glass to flow into both the front and back gaps. With this technique, both the amount of glass flowing and the distance along which it flows are limited, which allows the high temperature hold period to be reduced and avoids the erosion of the ferrite in the gap areas.