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For the Inventor, By the Inventor

Santa Cruz, CA, United States of America

Mary Frances Doerner

This inventor holds 29 USPTO granted patents, primarily in Magnetic Recording Media. Top assignees: Hitachi Global Storage Technologies Netherlands B.v., International Business Machines Corporation, Other. Active years: 1984-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Mary Frances Doerner. Retrieved from https://idiyas.com/inventor/mary-frances-doerner

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 29

% Patents Active = 58.6

Average Co-Inventor Count = 4.2

ph-index = 9

Forward Citations = 229(Granted Patents)


Location History:

  • San Jose, CA (US) (1984)
  • Los Gatos, CA (US) (1994)
  • Santa Cruz, CA (US) (1996 - 2008)

Company Filing History:

goldMedal15 out of 2,636 
 
Hitachi Global Storage Technologies Netherlands B.v.
 patents
silverMedal13 out of 166,325 
 
International Business Machines Corporation
 patents
bronzeMedal1 out of 834,453 
Other
 patents

Years Active: 1984-2008

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Areas of Expertise:
Magnetic Recording Disk
Thin Film Media
Antiferromagnetic Coupling
Pre-Seed Layer
CoCrFe Alloy
High Anisotropy Alloy
Ruthenium-Aluminum Layer
Ferromagnetic Films
Laminated Thin Film Disk
Nonmetallic Thin Film
Contact Recording
Magnetic Composition
29 patents (USPTO):Explore Patents
1. 7419730 - Magnetic recording disk with antiferromagnetically coupled master layer including copper (2008-09-02),
2. 7382590 - MR sensor and thin film media having alloyed Ru antiparallel spacer layer for enhanced antiparallel exchange coupling (2008-06-03),
3. 6893741 - Magnetic device with improved antiferromagnetically coupling film (2005-05-17),
4. 6872478 - Magnetic thin film media with a pre-seed layer of CrTiAl (2005-03-29),
5. 6863993 - Thin film media with a dual seed layer of RuAI/NiAIB (2005-03-08),
6. 6858331 - Magnetic thin film media with a bi-layer structure of CrTi/Nip (2005-02-22),
7. 6852430 - Magnetic thin film media with a pre-seed layer of CrTi (2005-02-08),
8. 6846543 - Thin film magnetic recording disk with ruthenium-aluminum layer (2005-01-25),
9. 6835476 - Antiferromagnetically coupled magnetic recording media with CoCrFe alloy first ferromagnetic film (2004-12-28),
10. 6723450 - Magnetic recording medium with antiparallel coupled ferromagnetic films as the recording layer (2004-04-20),
11. 6677052 - Preseed layer for a magnetic recording disk (2004-01-13),
12. 6607842 - Containing an AITa or AITi pre-seed layer, a CoCr onset layer and a CoCrPtB magnetic layer (2003-08-19),
13. 6599642 - High anisotropy alloy for thin film disk (2003-07-29),
14. 6596409 - Onset layer for thin film disk with CoPtCrB alloy (2003-07-22),
15. 6593009 - Magnetic thin film media with a pre-seed layer of CrTi (2003-07-15),

Title: **Mary Frances Doerner: Innovator in Magnetic Recording Technologies**

Introduction

Mary Frances Doerner, located in Santa Cruz, CA, is a prominent inventor recognized for her significant contributions to the field of magnetic recording technologies. With a remarkable portfolio of 29 patents, her innovative work has made a substantial impact on data storage solutions.

Latest Patents

One of her latest patents is titled "Magnetic recording disk with antiferromagnetically coupled master layer including copper." This patent describes an antiferromagnetically coupled magnetic recording medium where the master layer consists of at least two magnetic layers, with the top layer containing copper. The structure features a nonmagnetic spacer layer that facilitates the antiferromagnetic coupling of the layers. Additionally, the master layer is made up of distinct ferromagnetic materials, typically including a cobalt alloy such as CoPtCrBCu, which enhances performance when used with various substrates like circumferentially textured glass.

Another notable patent is for a "MR sensor and thin film media having alloyed Ru antiparallel spacer layer for enhanced antiparallel exchange coupling." This patent details a magnetic head composed of a free layer and an antiparallel (AP) pinned layer structure. The AP pinned layer includes at least two magnetic layers that are self-pinned antiparallel to each other, separated by an AP coupling layer made of a Ru alloy. This innovation significantly boosts the pinning field of the AP pinned layer compared to traditional configurations.

Career Highlights

Throughout her career, Mary Frances Doerner has worked at renowned companies such as Hitachi Global Storage Technologies and IBM. Her expertise and contributions in these organizations have propelled advancements in magnetic recording technology and have led to the filing of multiple essential patents.

Collaborations

Mary has collaborated with esteemed individuals including Xiaoping Bian and Kai Tang. These collaborations have been pivotal in developing innovative solutions within the realm of magnetic recording, showcasing the importance of teamwork in advancing technological frontiers.

Conclusion

Mary Frances Doerner is a notable inventor whose work continues to shape the future of magnetic recording technologies. Her impressive collection of patents reflects her commitment to innovation and excellence in her field. As data storage continues to evolve, her contributions will remain influential in pushing the boundaries of what is possible in magnetic recording mediums.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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