This inventor holds 9 USPTO granted patents. Top assignee: U.S. Philips Corporation. Active years: 1984-2000.
Company Filing History:
Years Active: 1984-2000
Title: The Innovative Contributions of Robertus D Verhaar
Introduction
Robertus D Verhaar is a prominent inventor based in Eindhoven, Netherlands. He has made significant contributions to the field of semiconductor technology, particularly in non-volatile memory and CMOS transistors. With a total of 9 patents to his name, Verhaar's work has had a lasting impact on the industry.
Latest Patents
One of Verhaar's latest patents is a method of manufacturing a non-volatile memory and a CMOS transistor. This invention provides a method of combining an EPROM (or EEPROM) with a standard CMOS process. After growing the gate oxide, a lightly doped polycrystalline or amorphous silicon layer is deposited. In this layer, the floating gate of the memory cells is defined, while the surface outside the memory matrix remains covered with poly I. The source/drain implantation in the memory cells is then carried out, with the poly layer situated outside the memory matrix masked against heavy implantation. A second poly layer can be provided from which the control gates of the memory cells are formed, creating a coherent layer with the existing poly I layer outside the matrix. In a subsequent series of steps in a standard CMOS process, n-ch and p-ch MOSTs are provided, with n-type gates for the n-ch MOSTs and p-type gates for the p-ch MOSTs being formed from the poly I layer.
Another notable patent is for a semiconductor device having an embedded non-volatile memory and method. This invention relates to an integrated circuit with an embedded non-volatile memory with a floating gate. At least two poly layers of equal or substantially equal thickness are used for this device. The first poly layer is for the floating gate and for the gates of NMOS and PMOS in the logic portion of the circuit. The second poly layer serves exclusively for the control electrode above the floating gate. This design helps prevent issues like overetching and bridging during saliciding by ensuring that the control electrode and the logic gates have the same thickness.
Career Highlights
Robertus D Verhaar is currently associated with U.S. Philips Corporation, where he continues to innovate and contribute to advancements in semiconductor technology. His work has been instrumental in enhancing the performance and reliability of memory devices.
Collaborations
Throughout his career, Verhaar has collaborated with notable colleagues, including Leendert De Bru