Stewart K Griffiths

Title: Stewart K Griffiths: Innovator in X-ray Lithography and Portable Detection Technologies

Introduction

Stewart K Griffiths is a notable inventor based in Livermore, California, with a remarkable portfolio of 12 patents. His work primarily focuses on advancements in X-ray lithography and portable detection technologies, showcasing his commitment to innovation in these fields.

Latest Patents

One of Griffiths' latest patents is the "Vitreous carbon mask substrate for X-ray lithography." This invention utilizes vitreous carbon as a substrate material for creating masks used in X-ray lithography. The new substrate allows for a thinner mask absorber, which enhances mask accuracy. An alternative embodiment of this invention involves using vitreous carbon as a LIGA substrate, where the VC wafer blank is etched in a reactive ion plasma, followed by bonding an X-ray resist. This surface treatment ensures good adhesion of the X-ray photoresist and facilitates the nucleation and adhesion of electrodeposited metal for LIGA mold-making. Additionally, the VC substrate effectively minimizes secondary radiation effects that can lead to delamination of the X-ray resist from the substrate.

Another significant patent is the "Portable apparatus for separating sample and detecting target analytes." This invention provides portable devices and methods for determining the presence of a target analyte. The device is designed to be hand-held, allowing a sample to be injected into it. A microfluidic separation occurs within the device, and at least one separated component is detected by an internal detection module. The presence of the target analyte is then indicated on an output interface, making it a valuable tool for various applications.

Career Highlights

Griffiths has had a distinguished career, working with prominent organizations such as Sandia Corporation and Sandia National Laboratories. His contributions to these institutions have significantly advanced the fields of technology and innovation.

Collaborations

Throughout his career, Griffiths has collaborated with notable colleagues, including Robert H Nilson and Brad S Mattson. These partnerships have fostered a collaborative environment that has led to groundbreaking advancements in their respective fields.

Conclusion

Stewart K Griffiths exemplifies the spirit of innovation through his contributions to X-ray lithography and portable detection technologies. His extensive patent portfolio and collaborations highlight his impact on the industry.