Roland R Stohr

Title: Roland R. Stohr: Innovator in Multilayer Interwiring Structures

Introduction

Roland R. Stohr is a notable inventor based in Nufringen, Germany. He has made significant contributions to the field of electrical engineering, particularly in the development of innovative interwiring structures. With a total of 3 patents to his name, Stohr's work exemplifies the intersection of creativity and technology.

Latest Patents

One of Stohr's latest patents is for a modular multilayer interwiring structure. This invention comprises a plurality of relatively small parts produced separately as sub-units. Each layer of the final structure is formed by joining a respective set of unit parts in one plane. The multilayer structure is built by stacking these layers, ensuring that the units of one layer are not vertically aligned with those of an adjacent layer. Each unit part includes at least one layer of conductive material, which may be patterned into diverse interconnection lines. Throughconnections extending from the frontside to the backside of the units are provided using a standardized array of via holes filled with conductive material. This design allows each unit to form an individual part of a more complex multilayer interwiring structure.

Another significant patent by Stohr is a contact probe arrangement for electrically connecting a test system. This arrangement includes a stack of perforated plates through which extend multiple contact probes. The stack consists of two kinds of plates, with the first kind forming the lowermost plates that have holes permitting vertical placement of the contact probes onto the contact pads of the device to be tested. The second kind of plates has variously shaped holes, allowing the contact probes to adapt to height differences caused by irregularities in the surface of the device. This innovative design ensures low contact resistance between the contact probe and the contact pad.

Career Highlights

Stohr's career is marked by his association with the International Business Machines Corporation (IBM), where he has contributed to various projects and innovations. His work has had a lasting impact on the field of electrical engineering and has paved the way for advancements in multilayer interwiring technologies.

Collaborations

Throughout his career, Stohr has collaborated with notable colleagues, including Thomas Bayer and Johann Greschner. These collaborations have further enriched his work and contributed to the development of innovative solutions in the industry.

Conclusion

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