This inventor holds 8 USPTO granted patents. Top assignees: Delphax Systems, National Research Council of Canada, Xerox Corporation. Active years: 1981-2004.
Location History:
- Toronto, CA (1981 - 1986)
- Ottawa, CA (1986 - 2004)
Company Filing History:
3 out of 47 
1 out of 1,039 
1 out of 24,257 
Years Active: 1981-2004
Title: Dolf Landheer: Innovator in Semiconductor Technology and Ionographic Printing
Introduction
Dolf Landheer is a notable inventor based in Toronto, Canada. He has made significant contributions to the fields of semiconductor technology and ionographic printing. With a total of 8 patents to his name, Landheer's work has had a lasting impact on these industries.
Latest Patents
One of Landheer's latest patents involves the use of doped or undoped rare-earth silicates as gate dielectrics in semiconductor technology. This invention discloses the application of gadolinium silicate as a gate dielectric in metal-insulating-semiconductor devices. The fabrication process includes exposing a cleaned semiconductor substrate to a flux of rare-earth atoms, silicon atoms, and oxygen atoms, followed by annealing the resulting layer. This innovation allows for the use of higher dielectric constant materials, which reduces tunneling current through the device by enabling thicker layers.
Another significant patent is related to the development of an ionographic cartridge and printer. This invention outlines a method for creating an ionographic cartridge that works with a dielectric-coated drum to produce electrostatic images. The process includes making a printed circuit board with driver electrodes, covering it with a dielectric layer, and attaching finger electrodes that straddle the driver electrodes. This method enhances the efficiency of the printing process.
Career Highlights
Throughout his career, Dolf Landheer has worked with various companies, including Delphax Systems. His expertise in semiconductor technology and printing has positioned him as a valuable asset in the industry.
Collaborations
Landheer has collaborated with notable individuals such as Andrzej Maczuszenko and Paul E Plasschaert. These partnerships have contributed to the advancement of his innovative projects.
Conclusion
Dolf Landheer's contributions to semiconductor technology and ionographic printing demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to advancing technology in meaningful ways.