Company Filing History:

11 out of 2,297

Digital Equipment Corporation

1 out of 832,761

Other

patents

Years Active: 1989-1996

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5559654 - Narrow track thin film head for high track density recording (1996-09-24),

2. 5404635 - Method of making a narrow track thin film head (1995-04-11),

3. 5221422 - Lithographic technique using laser scanning for fabrication of (1993-06-22),

4. 5159511 - Biasing conductor for MR head (1992-10-27),

5. 5111352 - Three-pole magnetic head with reduced flux leakage (1992-05-05),

6. 5081554 - Biasing conductor for MR head (1992-01-14),

7. 5075956 - Method of making recording heads with side shields (1991-12-31),

8. 4985985 - Solenoidal thin film read/write head for computer mass storage device (1991-01-22),

9. 4972287 - Having a solenoidal energizing coil (1990-11-20),

10. 4935832 - Recording heads with side shields (1990-06-19),

11. 4900650 - Method of producing a pole piece with improved magnetic domain structure (1990-02-13),

12. 4885649 - Thin film head having a magneto-restrictive read element (1989-12-05),

13. 4877480 - Lithographic technique using laser for fabrication of electronic (1989-10-31),

Title: Shyam C Das: Innovator in Thin Film Head Technology

Introduction

Shyam C Das is a notable inventor based in Sudbury, MA (US), recognized for his contributions to the field of thin film head technology. He holds a total of 13 patents, showcasing his innovative approach to high track density recording.

Latest Patents

Among his latest patents is the "Narrow track thin film head for high track density recording." This invention outlines a process for fabricating a thin film head that defines an easy axis parallel to the track in the narrow poletip, eliminating the need for a very high magnetic field in the plating cell. The process involves sheet depositing a magnetic layer, followed by a sheet of gap material, and then another magnetic layer. This can be accomplished through either a vacuum technique or an electroplating process. If vacuum processing is utilized, all three depositions can occur in one pumpdown. The use of sheet magnetic films results in a very small demagnetizing field, requiring only a small orienting field, unlike the larger field needed in prior art.

Another significant patent is the "Method of making a narrow track thin film head," which shares similar features and processes as the previous patent, emphasizing the innovative techniques developed by Das.

Career Highlights

Shyam C Das has worked with prominent companies, including Digital Equipment Corporation, where he applied his expertise in developing advanced technologies. His work has significantly impacted the field of data storage and recording technologies.

Collaborations

Das has collaborated with notable individuals such as Michael L Mallary and Jamaluddin Khan, contributing to the advancement of thin film head technology through teamwork and shared expertise.

Conclusion

Shyam C Das is a distinguished inventor whose work in thin film head technology has led to significant advancements in high track density recording. His innovative patents and collaborations reflect his commitment to pushing the boundaries of technology.

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