Company Filing History:
Years Active: 2004-2007
Title: Innovations of John L Glasper
Introduction
John L Glasper is a notable inventor based in Malvern, GB. He has made significant contributions to the field of photodetector technology, holding 2 patents that showcase his innovative approach to solving complex engineering challenges.
Latest Patents
One of his latest patents is for an avalanche photodiode with reduced sidewall defects. This invention incorporates a photodetector circuit that features an avalanche photodiode structure with a contact layer forming an ohmic contact over an annular region with the annular guard ring. The fabrication process utilizes a substrate that can either be the handle wafer of a p− silicon-on-insulator wafer or a p-Si substrate with an insulating SiO layer. The process includes creating a window in the insulating layer through conventional photolithographic and etching techniques. A n+ guard ring is formed by diffusing donor impurities into the substrate, and a thinner insulating SiO layer is thermally grown to cover the exposed surface of the substrate within the window. The use of the thin oxide layer reduces the area of the interface between the silicon of the layer and the SiO of the layer during selective epitaxial deposition, leading to fewer epitaxial defects at the window edge. This innovative fabrication process does not significantly increase complexity, as the overall number of masks or process steps remains similar to conventional methods.
Career Highlights
John L Glasper is currently employed at Qinetiq Limited, where he continues to develop cutting-edge technologies. His work has been instrumental in advancing the capabilities of photodetectors, which are crucial in various applications, including telecommunications and imaging systems.
Collaborations
He has collaborated with notable colleagues such as David John Robbins and Alan D Marrs, contributing to a dynamic and innovative work environment.
Conclusion
John L Glasper's contributions to the field of photodetector technology exemplify the spirit of innovation. His patents reflect a commitment to advancing technology while maintaining efficiency in fabrication processes.