William Stokes

Title: Innovations by William Stokes in Magnetic Recording Technology

Introduction

William Stokes is an accomplished inventor based in Milpitas, CA (US). He has made significant contributions to the field of magnetic recording technology. His innovative methods have paved the way for advancements in the fabrication of perpendicular magnetic recording heads.

Latest Patents

William Stokes holds a patent for a method of reducing main pole corrosion during aluminum oxide etch. This patent describes a technique for removing an alumina layer around a main pole layer during the fabrication process. The method involves immersing a substrate in a series of aqueous solutions purged with an inert gas to eliminate oxygen, thereby preventing corrosion of the main pole. The process includes soaking the substrate in deionized water, followed by immersion in an etching bath at approximately 80°C with a pH of 10.5. The bath chemistry is primarily based on sodium carbonate and sodium bicarbonate, with nitrogen purging to enhance etch uniformity and minimize residue. After etching, the substrate is rinsed in a second deionized water bath and subjected to a quick dump rinse before drying.

Career Highlights

William Stokes is associated with Headway Technologies, Incorporated, where he has contributed to various projects in magnetic recording technology. His expertise in etching processes has been instrumental in improving the quality and reliability of magnetic recording heads.

Collaborations

William has collaborated with notable colleagues, including David K Wagner and Chien-Li Lin, who have also made significant contributions to the field.

Conclusion

William Stokes is a prominent inventor whose work in reducing corrosion during the fabrication of magnetic recording heads has had a lasting impact on the industry. His innovative methods continue to influence advancements in technology.