Company Filing History:

17 out of 25,530

Sharp Kabushiki Kaisha Corporation

Years Active: 1989-1997

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18 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5616937 - Compound semiconductor luminescent device (1997-04-01),

2. 5554877 - Compound semiconductor electroluminescent device (1996-09-10),

3. 5508522 - Method for producing a group II-VI compound semiconductor thin film and (1996-04-16),

4. 5416884 - Semiconductor waveguide structure of a II-VI group compound (1995-05-16),

5. 5270614 - Luminescent material (1993-12-14),

6. 5237182 - Electroluminescent device of compound semiconductor with buffer layer (1993-08-17),

7. 5204283 - Method of growth II-VI semiconducting compounds (1993-04-20),

8. 5198690 - Electroluminescent device of II-IV compound semiconductor (1993-03-30),

9. 5187116 - Process for preparing electroluminescent device of compound semiconductor (1993-02-16),

10. 5113233 - Compound semiconductor luminescent device (1992-05-12),

11. 5103269 - Electroluminescent device of compound semiconductor comprising ZnS or (1992-04-07),

12. 5100832 - Process for preparing epitaxial compound semiconductor (1992-03-31),

13. 5057183 - Process for preparing epitaxial II-VI compound semiconductor (1991-10-15),

14. 5055363 - Electroluminescent device of compound semiconductor (1991-10-08),

15. 5037709 - Electroluminescent device of compound semiconductor (1991-08-06),

Title: Masahiko Kitagawa: Innovator in Compound Semiconductor Technology

Introduction

Masahiko Kitagawa is a prominent inventor based in Nara, Japan. He has made significant contributions to the field of compound semiconductors, holding a total of 18 patents. His work has advanced the technology behind luminescent devices, which are crucial for various applications in electronics and optoelectronics.

Latest Patents

Among his latest patents, Kitagawa has developed a compound semiconductor luminescent device. This device comprises a semiconductor substrate and a multi-layered structure that includes at least one conductive layer, a luminescent layer, and a current injection layer. The substrate and layers are made from at least one type of II-VI group compound semiconductor. Another notable patent is for a compound semiconductor electroluminescent device. This device features a substrate with at least one through-hole and an electroluminescent part made up of multiple epitaxial compound semiconductor layers. It also includes a pair of electrodes with external leads, allowing a voltage from an external source to be directly applied to the electroluminescent part.

Career Highlights

Kitagawa has worked with notable companies such as Sharp Kabushiki Kaisha Corporation and Sharp Corporation. His experience in these organizations has allowed him to refine his expertise in semiconductor technology and contribute to innovative projects.

Collaborations

Throughout his career, Kitagawa has collaborated with esteemed colleagues, including Yoshitaka Tomomura and Kenji Nakanishi. These partnerships have fostered a creative environment that has led to groundbreaking advancements in the field.

Conclusion

Masahiko Kitagawa's contributions to compound semiconductor technology have positioned him as a key figure in the industry. His innovative patents and collaborations continue to influence the development of advanced electronic devices.

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