Magnetic head having a pole piece with a double pedestal structure

A magnetic head which includes a pole piece with a double pedestal structure has improved overwrite capabilities and reduced fringing fields. The magnetic head has first and second pole pieces and a gap layer which separates the first and the second pole pieces. The first pole piece includes a first...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	KHERA GAUTAM MOHAN, SHEN YONG, HSU YIMIN
Format:	Patent
Sprache:	eng
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A magnetic head which includes a pole piece with a double pedestal structure has improved overwrite capabilities and reduced fringing fields. The magnetic head has first and second pole pieces and a gap layer which separates the first and the second pole pieces. The first pole piece includes a first pole piece layer, a bottom pedestal portion formed over the first pole piece layer at an air bearing surface (ABS), and a top pedestal portion formed over the bottom pedestal portion. The top pedestal portion has a thickness that is no more than half of that of the bottom pedestal portion and a length that is no more than half of that of the bottom pedestal portion. Advantageously, a throat height of the magnetic head is reduced from use of the top pedestal portion whereas the mechanical reliability of the first pole piece is increased from use of the bottom pedestal portion.