Jozeph Peter Karl Hoefsmit

Title: Jozeph Peter Karl Hoefsmit: Semiconductor Device Inventor

Introduction

Jozeph Peter Karl Hoefsmit is an inventor associated with Stadskanaal, the Netherlands. His work includes semiconductor devices designed to improve mounting, heat transfer, and reliability. He is credited with 2 patents and has worked with Koninklijke Philips N.V. and NXP B.V.

Latest Patents

Hoefsmit’s patent portfolio includes two inventions focused on semiconductor device design and manufacturing.

“Semiconductor device and method of manufacturing thereof” describes a device with a semiconductor element mounted on a conductive bottom plate and protected by an insulating resin encapsulation. A stepped cavity along the plate’s edge helps control the resin during manufacturing, allowing the finished device to mount flat while retaining effective heat transfer through the bottom plate. The invention also describes a straightforward, low-cost manufacturing method and identifies discrete power devices, such as LDMOSFETs, as potential applications.

“Semiconductor device with a diode, and method of manufacturing such a device” addresses diode reliability, particularly in high-voltage or high-power applications. Its design electrically isolates a portion of a semiconductor region and connects that portion to the other semiconductor region, with the second connection conductor positioned on the isolated portion. This arrangement supports direct surface mounting and is intended to reduce breakdown and high leakage current. The patent also describes simple, inexpensive manufacturing approaches, including separating semiconductor regions with a groove and forming a conductive channel using a current pulse.

Career Highlights

Hoefsmit’s listed company affiliations include Koninklijke Philips N.V. and NXP B.V. His patented work addresses practical challenges in semiconductor packaging, power-device heat management, diode mounting, and electrical reliability.

Collaborations

His listed coworkers include Nicolaus Antonius Maria Koper and Pieter Weyert Lukey.

Conclusion

Jozeph Peter Karl Hoefsmit’s two patents reflect a focus on manufacturable semiconductor designs that improve device mounting, thermal performance, and reliability.