Company Filing History:
4 out of 113 
1 out of 830 
Years Active: 1977-1980
Title: Johann Hofer: Innovator in Semiconductor Technology
Introduction
Johann Hofer is a notable inventor based in Kirchdorf, Germany. He has made significant contributions to the field of semiconductor technology, holding a total of 5 patents. His work focuses on processes that enhance the production and efficiency of silicon-based materials.
Latest Patents
One of Hofer's latest patents is a process for determining the effective doping agent content of hydrogen. This innovative method involves zone drawing a silicon rod of the highest purity in the presence of hydrogen to be tested. By redetermining the specific resistance of the silicon rod, the concentration of the doping agent in the hydrogen can be computed. This stepwise determination allows for the assessment of doping agent levels at different points along the rod.
Another significant patent is for the manufacture of silicon with a large surface area bonded to a substrate. This process includes depositing silicon onto panel-shaped substrates of glassy carbon, which are heated to temperatures above the melting point of silicon. The cooling process is carefully controlled to ensure the silicon adheres effectively to the substrate, making it particularly useful in the manufacture of solar cells.
Career Highlights
Throughout his career, Johann Hofer has worked with prominent companies such as Wacker-Chemitronic Gesellschaft für Elektronik-Grundstoffe mbH and Wacker-Chemie GmbH. His experience in these organizations has contributed to his expertise in semiconductor materials and processes.
Collaborations
Hofer has collaborated with notable colleagues, including Dietrich Schmidt and Karl E. Huber. Their joint efforts have further advanced the field of semiconductor technology.
Conclusion
Johann Hofer's innovative work in semiconductor technology and his contributions through multiple patents highlight his importance in the field. His processes for determining doping agent content and manufacturing silicon panels are paving the way for advancements in solar energy and electronics.