Ellis T Cha

Introduction

Ellis T. Cha, based in San Jose, California, is a renowned inventor with an impressive portfolio of 70 patents. His contributions to the field of magnetic recording technology have significantly influenced the design and functionality of hard disk drives.

Latest Patents

Among his latest innovations, Cha has developed a patented technology for patterned reader shields designed to enhance the efficiency of read/write heads in magnetic recording devices. This PMR (Perpendicular Magnetic Recording), TAMR (Thermally Assisted Magnetic Recording), and MAMR (Microwave Assisted Magnetic Recording) implementation utilizes magnetic read shields that incorporate a patterned layer of thermally absorbing material to mitigate heat production during operation. A notable feature includes a heating coil that adjusts the fly-height of the slider by generating a thermal protrusion at the air-bearing surface (ABS). Furthermore, the technology employs a unique layered design that minimizes heat transfer to the ABS, thereby maintaining optimal performance.

Another significant patent addresses the issue of lubricant and hydrocarbon accumulation in hard disk drives (HDD). Cha's slider-mounted read/write transducer features a novel topology that prevents the attraction and buildup of these materials. This design includes a system of channels and cavities arranged symmetrically around a central longitudinal axis, significantly improving the efficiency and durability of HDD operations.

Career Highlights

Ellis T. Cha has been instrumental in the advancement of magnetic recording technologies throughout his career. His work at well-known companies such as Sae Magnetics Limited and Headway Technologies Incorporated highlights his influence and expertise in the industry. His commitment to innovation is evident in his numerous patents, which reflect his dedication to solving complex engineering challenges.

Collaborations

Throughout his career, Cha has collaborated with esteemed colleagues, including Yen Fu and Zhu Feng. These partnerships have contributed to the successful development of pioneering technologies in magnetic recording and have expanded the boundaries of what is possible within the field.

Conclusion

Ellis T. Cha stands out as a pivotal figure in the world of magnetic recording technology. His innovative patents and collaborative spirit have not only advanced the industry but have also paved the way for future improvements. With a strong foundation built on creativity and technical prowess, Cha's contributions will continue to impact the field for years to come.