Company Filing History:

14 out of 42,508

Hitachi, Ltd.

patents

2 out of 182

Hitachi Vlsi Engineering Corp.

patents

1 out of 4

Vlsi Engineering Corporation

patents

where one patent can have more than one assignee

Years Active: 1990-2005

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6924525 - SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE INCLUDING MEMORY CELL SECTION HAVING CAPACITOR OVER BITLINE STRUCTURE AND WITH THE MEMORY AND PERIPHERAL SECTIONS HAVING CONTACT PLUG STRUCTURES CONTAINING A BARRIER FILM AND EFFECTING ELECTRICAL CONTACT WITH MISFETS OF BOTH MEMORY AND PERIPHERAL SECTIONS (2005-08-02),

2. 6635918 - Semiconductor integrated circuit device and method for manufacturing the same (2003-10-21),

3. 6150689 - Semiconductor integrated circuit device and method for manufacturing the (2000-11-21),

4. 6108264 - Dynamic type semiconductor memory device (2000-08-22),

5. 5862095 - Semiconductor memory having both a refresh operation cycle and a normal (1999-01-19),

6. 5719815 - Semiconductor memory having a refresh operation cycle and operating at a (1998-02-17),

7. 5701031 - Sealed stacked arrangement of semiconductor devices (1997-12-23),

8. 5506804 - Dynamic Random Access Type Semiconductor Device (1996-04-09),

9. 5426616 - Semiconductor IC device having a voltage conversion circuit which (1995-06-20),

10. 5332922 - Multi-chip semiconductor package (1994-07-26),

11. 5276648 - Testing method for a semiconductor memory device (1994-01-04),

12. 5150325 - Bi-CMOS semiconductor memory device, including improved layout structure (1992-09-22),

13. 5043947 - Semiconductor memory device (1991-08-27),

14. 4941129 - Semiconductor memory device (1990-07-10),

Title: The Innovative Contributions of Tetsu Udagawa

Introduction

Tetsu Udagawa, an accomplished inventor based in Iruma, Japan, has made significant contributions to the field of semiconductor technology. With a remarkable portfolio of 14 patents, Udagawa has consistently pushed the boundaries of innovation, particularly in the design and manufacturing processes of integrated circuit devices.

Latest Patents

Among his notable inventions is a semiconductor integrated circuit device that includes a memory cell section featuring a unique capacitor over bitline structure. This design enhances the electrical contact effectiveness with the MISFETs in both memory and peripheral sections, simplifying the overall manufacturing process of DRAM. The innovations presented in his latest patents focus on reducing the sheet resistance of the gate electrode and bit lines, achieving values of 2 Ω/□ or lower. By integrating the formation of peripheral circuit interconnections during the gate electrode and bit line formation steps, Udagawa has notably reduced the number of manufacturing steps required for DRAM production.

Career Highlights

Udagawa's career has been marked by his longstanding association with respected companies such as Hitachi, Ltd. and Hitachi VLSI Engineering Corporation. His work at these esteemed organizations has allowed him to develop cutting-edge technologies and contribute to advancements in semiconductor engineering that meet the demands of an ever-evolving industry.

Collaborations

Throughout his career, Udagawa has collaborated with talented individuals in his field, including colleagues Kazumasa Yanagisawa and Masamichi Ishihara. These partnerships have fostered a rich environment for innovation and knowledge sharing, culminating in several successful projects and patents.

Conclusion

Tetsu Udagawa's contributions to the semiconductor industry are noteworthy and reflect his dedication to innovation and excellence. His patents not only enhance the functionality and efficiency of semiconductor devices but also pave the way for future advancements in technology. As an esteemed inventor, Udagawa continues to inspire future generations in the field of integrated circuit design.

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