Claims
- 1. A merged thin film magnetic head including an inductive write structure and a magnetoresistive sensor comprising:a nonmagnetic substrate; a first shield layer disposed above said substrate; a second shield/pole layer that serves as a first magnetic pole of said inductive write structure; a protection layer over said second shield/pole layer in a pattern that exposes a window for forming a pedestal to support said inductive write structure; a second magnetic pole layer over said second shield/pole layer and over said window; and a pedestal formed below said inductive write structure, and recessed channels formed in said second shield/pole layer for defining said pedestal.
- 2. The merged magnetoresistive head of claim 1 wherein said magnetoresistive element is either an anisotropic magnetosresistive element, a spin-valve element or a giant magnetoresistive element.
- 3. The merged magnetoresistive head of claim 1 wherein said protection layer is nonmagnetic.
- 4. The merged magnetoresistive head of claim 1 wherein said protection layer consists essentially of thin Ta (100-300 Å), Al2O3 (5000-15000 Å) and thick Ta film (2000-10000 Å).
- 5. The merged magnetoresistive head of claim 1 wherein said protection layer consists essentially of nonmagnetic material such as SiO2, Si3N4, TaW, and Cr.
- 6. A thin film merged magnetic head including an inductive write structure having top and bottom poles, and a magnetoresistive sensor, comprising:a nonmagnetic substrate; a first shield layer disposed on said substrate; a second shield layer that functions as a bottom pole of said inductive write structure; a magnetoresistive read element disposed between said first and second shield layers; a pole tip region associated with said top and bottom poles; a write gap; an extra write gap over said write gap; a protection layer in the form of a window defining channels formed in said second shield layer.
Parent Case Info
This is a division of application Ser. No. 09/015,970 filed Jan. 30, 1998 now U.S. Pat. No. 5,996,213.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
5438747 |
Krounbi et al. |
Aug 1995 |
|
5640753 |
Schultz et al. |
Jun 1997 |
|
5878481 |
Feng et al. |
Mar 1999 |
|
5996213 |
Shen et al. |
Dec 1999 |
|