Location History:
- Milpitas, CA (US) (2006)
- Sunnyvale, CA (US) (2002 - 2013)
Company Filing History:
21 out of 1,214 
2 out of 118 Years Active: 2002-2013
Title: Innovations of Chen-Jung Chien in Magnetic Recording Technologies
Introduction
Chen-Jung Chien, an inventor based in Sunnyvale, CA, has made significant contributions to the field of magnetic recording. With an impressive portfolio of 23 patents, Chien has focused his innovative efforts on enhancing magnetic pole designs and hard bias structures used in read heads for data storage devices.
Latest Patents
Two of his notable patents include the following:
1. **Self-aligned full side shield PMR and method to make it** - This invention describes a magnetic pole suitable for perpendicular magnetic recording. The write pole is symmetrically positioned relative to its side shields and features at least three additional surfaces that are oriented in planes normal to the substrate’s top surface.
2. **Hard bias design for extra high-density recording** - This patent introduces a hard bias structure for biasing a free layer in a magnetoresistive (MR) element within a read head. The structure comprises a composite hard bias layer with a CoCrPt/CoCrPt configuration, where the upper CoCrPt layer exhibits a larger coercivity (Hc) value and has a thickness 2 to 10 times greater than that of the lower CoCrPt layer. The design may also include a BCC underlayer, such as FeCoMo, enhancing the magnetic moment of the hard bias structure. The optimization of thicknesses for the BCC underlayer and CoCrPt layers achieves a larger process window and reduced output asymmetry during read operations.
Career Highlights
Throughout his career, Chen-Jung Chien has worked with reputable companies in the technology sector, including Headway Technologies, Incorporated and Magic Technologies, Inc. His insights and contributions have helped advance the efficiency and performance of magnetic recording technologies.
Collaborations
Chien has collaborated with esteemed colleagues such as Chyu-Jiuh Torng and Cherng-Chyi Han, further enhancing the depth of research and innovation in his field.
Conclusion
Chen-Jung Chien's legacy in the magnetic recording industry is characterized by innovation and collaboration. His patents not only reflect his expertise but also contribute to the ongoing evolution of data storage technologies. As these technologies continue to advance, the impact of Chien's inventions will remain significant in shaping the future of magnetic data recording.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.