This inventor holds 3 USPTO granted patents. Top assignee: Siemens Aktiengesellschaft. Active years: 1979-1989.
Location History:
- Munich, DE (1979)
- Aschheim, DE (1981 - 1989)
Company Filing History:
Years Active: 1979-1989
Title: Erhard Lehmann: Innovator in Semiconductor Technology
Introduction
Erhard Lehmann is a notable inventor based in Aschheim, Germany. He has made significant contributions to the field of semiconductor technology, holding a total of 3 patents. His work focuses on improving the efficiency and performance of power switch devices.
Latest Patents
One of his latest patents is a semiconductor power switch with a thyristor. This innovative power switch device comprises an asymmetrically blocking thyristor (ASCR) connected in series with a diode. The ASCR and the diode require only about half the central zone thickness compared to a symmetrically blocking thyristor designed for the same blocking voltage in reverse direction. This design results in a much lower blocking delay charge (Q.sub.rr) for the series connection of the ASCR and diode.
Another significant patent is a circuit arrangement for reducing the recovery time of a thyristor. This arrangement features a control electrode, a main emitter electrode, and at least one auxiliary emitter electrode positioned between the main emitter electrode and the control electrode. It includes two current sources, one delivering a pulse of one polarity connected between the control electrode and the auxiliary emitter electrode, and the other delivering a pulse of the opposite polarity connected between the auxiliary emitter electrode and the main emitter electrode.
Career Highlights
Erhard Lehmann is currently employed at Siemens Aktiengesellschaft, a leading global technology company. His work at Siemens has allowed him to develop and patent innovative solutions that enhance semiconductor technology.
Collaborations
Throughout his career, Lehmann has collaborated with notable colleagues, including Peter Voss and Peter Wojtalla. These collaborations have contributed to the advancement of technology in their respective fields.
Conclusion
Erhard Lehmann's contributions to semiconductor technology through his patents and work at Siemens highlight his role as an influential inventor. His innovative designs continue to impact the industry positively.