Simplified Floppy Disk Head Without Erase Cores
Original Publication Date: 1985-Feb-01
Included in the Prior Art Database: 2005-Feb-18
The heads used in the floppy disk drives today utilize a read/write head followed by a tunnel erase head. The assembly of this head is a complex process with many parts. The present heads are further faced with noise problems created by cross talk from the erase heads into the read/write channel. This article teaches how to reduce the number of pieces to six and to eliminate the cross-talk noise problem by eliminating the second set of heads - the erase heads. In this system, the same head used to read or write a 6.5-mil track is also used to create an erased track 13 mils wide. This is accomplished by creating a gap, as shown in Fig. 1. In this configuration, normal current through the coil will cause sufficient flux to overcome the coercivity of the disk at the 6.