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Cheongju, South Korea

Key Foundry Co., Ltd

USPTO Granted Patents = 42

Trademarks = 1

Forward Citations = 35

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34 inventors (with patents filed for the assignee):

Min Kuck Cho (7 out of 13 patents)

Kee Sik Ahn (7 out of 14 patents)

Sung Bum Park (7 out of 14 patents)

4. Hyun Kwang Shin (6 out of 12 patents)

5. Seong Jun Park (6 out of 10 patents)

6. Jung Hwan Lee (6 out of 15 patents)

7. Yang Beom Kang (5 out of 13 patents)

8. Jong Min Cho (5 out of 7 patents)

9. Tae Hoon Lee (5 out of 15 patents)

10. Su Jin Kim (5 out of 9 patents)

11. Kwang Il Kim (4 out of 18 patents)

12. Young Bae Kim (4 out of 19 patents)

13. Kang Sup Shin (3 out of 14 patents)

14. Jin Seong Chung (3 out of 6 patents)

15. In Chul Jung (3 out of 8 patents)

Core Competencies:

Non-Volatile Memory

High Voltage Devices

Manufacturing Method

Deep Trench Structure

Electrical Fuse

Analog-to-Digital Converter

Controllable Channel Length

Split Gate MOSFET

CMOS Transistor

Schottky Barrier Diodes

Memory Device Array

Gate-Through Implantation

42 patents: Sort by Forward Citations

1. 11923368 - Semiconductor device with junction FET transistors having multi pinch-off voltages (2024-03-05),

2. 11915767 - Negative voltage switching device and non-volatile memory device using the same (2024-02-27),

3. 11862695 - Split gate power MOSFET and split gate power MOSFET manufacturing method (2024-01-02),

4. 11856769 - Semiconductor device with single poly non-volatile memory device and manufacturing method (2023-12-26),

5. 11854817 - Manufacturing method for deep trench capacitor with scalloped profile (2023-12-26),

6. 11854622 - Electrical fuse one time programmable (OTP) memory (2023-12-26),

7. 11848061 - Non-volatile memory device including sense amplifier and method for operating the same (2023-12-19),

8. 11825650 - Single poly non-volatile memory device and manufacturing method thereof (2023-11-21),

9. 11799493 - Analog-to-digital converter and operation method thereof (2023-10-24),

10. 11791409 - High voltage semiconductor device and manufacturing method of high voltage semiconductor device (2023-10-17),

11. 11764216 - Semiconductor device with controllable channel length and manufacturing method thereof (2023-09-19),

12. 11757011 - Semiconductor device with non-volatile memory cell and manufacturing method thereof (2023-09-12),

13. 11756992 - Semiconductor device with increased isolation breakdown voltage (2023-09-12),

14. 11696440 - Nonvolatile memory device (2023-07-04),

15. 11688795 - Semiconductor device with controllable channel length and manufacturing method of semiconductor device with controllable channel length (2023-06-27),

Key Foundry Co., Ltd, based in Cheongju, South Korea, specializes in the development and manufacturing of advanced semiconductor devices. The company focuses on a range of technologies including non-volatile memory, high voltage devices, and analog-to-digital converters. Key Foundry is also engaged in producing electrical fuses, deep trench capacitors, and single poly memory solutions, emphasizing innovation in controllable channel length technologies. Its expertise positions it as a significant player in the semiconductor industry, catering to diverse applications.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Key Foundry Co., Ltd

42 Patents

#5 in Cheongju

#349 in South Korea

#16,326 in the World

Cheongju, South Korea

Key Foundry Co., Ltd

Forward Citations = 35

34 inventors:

Min Kuck Cho (7 out of 13 patents)

Kee Sik Ahn (7 out of 14 patents)

Sung Bum Park (7 out of 14 patents)

4. Hyun Kwang Shin (6 out of 12 patents)

5. Seong Jun Park (6 out of 10 patents)

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