This inventor holds 2 USPTO granted patents. Top assignee: Siemens Aktiengesellschaft. Active years: 2004-2005.
Company Filing History:
Years Active: 2004-2005
Title: The Innovative Contributions of Stefan Lesjak
Introduction
Stefan Lesjak is a notable inventor based in Ettlingen, Germany. He has made significant contributions to the field of electrical substrate processing, holding 2 patents that showcase his innovative approach to technology.
Latest Patents
One of his latest patents is titled "Arrangement and method for processing electrical substrates using lasers." This invention utilizes a diode-pumped, quality-controlled, pulsed solid-state laser for processing electric circuit substrates. The laser can emit radiation with a wavelength between 266 nm and 1064 nm, a pulse repetition rate between 1 kHz and 1 MHz, and a pulse length of 30 ns to 200 ns, with an average power ranging from 1 W to around 5 W. The operating modes can be adjusted via a controller, allowing the laser to perform various operations such as drilling, etch removal, or exposure, depending on the application. The laser beam can be precisely deflected on the substrate using a galvo mirror deflector unit.
Another significant patent by Lesjak is the "Method for producing a trench structure in a polymer substrate." This method aims to create a trench structure with steep sidewalls that are free of residues, particularly in glass-fiber-reinforced substrates. The process involves using a conformal mask with cutouts that correspond to the desired trench structure. The laser beam is guided over the mask cutouts, ensuring that only the high-energy portions of the beam interact with the polymer surface, effectively removing the substrate material, including any glass fiber reinforcement.
Career Highlights
Stefan Lesjak is currently employed at Siemens Aktiengesellschaft, where he continues to develop innovative solutions in the field of electrical engineering. His work has contributed to advancements in laser technology and substrate processing.
Collaborations
Lesjak collaborates with talented individuals such as Hubert De Steur and Wei Pan, enhancing the innovative capabilities of his projects.
Conclusion
Stefan Lesjak's contributions to the field of electrical substrate processing through his patents demonstrate his commitment to innovation and technology. His work at Siemens Aktiengesellschaft continues to influence advancements in laser applications and substrate processing techniques.