Winfried Denk

Title: Winfried Denk: Innovator in Semiconductor Imaging

Introduction

Winfried Denk is a notable inventor based in Berkeley Heights, NJ (US). He holds a total of 4 patents that contribute significantly to the field of semiconductor imaging. His innovative approaches have enhanced the capabilities of imaging technologies, particularly in the semiconductor industry.

Latest Patents

One of Denk's latest patents is a method and apparatus for imaging semiconductor devices. This technique utilizes two-photon absorption to image semiconductor devices, which is a departure from conventional optical beam-induced imaging. The method employs light beams with frequencies insufficient to excite electrons across the semiconductor bandgap. Instead, it increases the instantaneous intensity of lower frequency light, allowing electron transitions to occur predominantly in the localized region where the beam is focused. This results in minimal absorption during passage through the substrate and maximal absorption in the component-rich active layer, enhancing the imaging of fine-detail semiconductor devices. The quadratic dependence of free carrier generation on excitation intensity not only improves resolution but also provides a three-dimensional sectioning capability.

Another significant invention by Denk is an optical beam power controller using a tiltable birefringent plate. This invention offers an inexpensive solution for fast, continuous control of a linearly polarized optical beam, such as that from a laser. The controller consists of a birefringent plate that can be tilted in relation to the beam and a polarization analyzer. Alternative double pass embodiments are designed to reduce beam displacement and the required tilt angle.

Career Highlights

Throughout his career, Winfried Denk has worked with prominent companies such as Lucent Technologies Inc. and Agere Systems Inc. His contributions to these organizations have been instrumental in advancing optical and semiconductor technologies.

Collaborations

Denk has collaborated with notable individuals in his field, including Chunhui Xu and Gadi Lenz. These partnerships have fostered innovation and development in semiconductor imaging technologies.

Conclusion

Winfried Denk's contributions to semiconductor imaging through his patents and collaborations highlight his role as a significant innovator in the field. His work continues to influence advancements in imaging technologies, making a lasting impact on the industry.