Inventor
KOYA SHIGEKI
JP64 patents
⚠️ This page may combine multiple inventors who share the name “KOYA SHIGEKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MURATA MANUFACTURING CO
44 patentsUS10056476B1Aug 21, 2018
Heterojunction bipolar transistor
MURATA MANUFACTURING CO9 citations84
US10002950B1Jun 19, 2018
Bipolar transistor and method for producing the same
MURATA MANUFACTURING CO6 citations84
US10886388B2Jan 5, 2021
Heterojunction bipolar transistor
MURATA MANUFACTURING CO1 citations73
US10629712B2Apr 21, 2020
Heterojunction bipolar transistor
MURATA MANUFACTURING CO3 citations73
US10629591B2Apr 21, 2020
Semiconductor device
MURATA MANUFACTURING CO2 citations73
US10297680B2May 21, 2019
Bipolar transistor and method for producing the same
MURATA MANUFACTURING CO1 citations73
US11107909B2Aug 31, 2021
Semiconductor device
MURATA MANUFACTURING CO2 citations72
US10868155B2Dec 15, 2020
Compound semiconductor device
MURATA MANUFACTURING CO2 citations72
US11984380B2May 14, 2024
Semiconductor package, semiconductor device, semiconductor package-mounted apparatus, and semiconductor device-mounted apparatus
MURATA MANUFACTURING CO1 citations63
US11978786B2May 7, 2024
Bipolar transistor and radio-frequency power amplifier module
MURATA MANUFACTURING CO0 citations63
US11871513B2Jan 9, 2024
Multilayer wiring substrate
MURATA MANUFACTURING CO0 citations63
US11705875B2Jul 18, 2023
Power amplifier module
MURATA MANUFACTURING CO1 citations63
US11658180B2May 23, 2023
Semiconductor device having a plurality of bipolar transistors with different heights between their respective emitter layers and emitter electrodes
MURATA MANUFACTURING CO0 citations63
US11626511B2Apr 11, 2023
Semiconductor device
MURATA MANUFACTURING CO0 citations63
US11508835B2Nov 22, 2022
Bipolar transistor and method for producing the same
MURATA MANUFACTURING CO0 citations63
US11476807B2Oct 18, 2022
Power amplifier module
MURATA MANUFACTURING CO0 citations63
US11251290B2Feb 15, 2022
Bipolar transistor and method for producing the same
MURATA MANUFACTURING CO0 citations63
US11240912B2Feb 1, 2022
Multilayer wiring substrate
MURATA MANUFACTURING CO0 citations63
US11227941B2Jan 18, 2022
Bipolar transistor and method for producing the same
MURATA MANUFACTURING CO0 citations63
US11164963B2Nov 2, 2021
Bipolar transistor and radio-frequency power amplifier module
MURATA MANUFACTURING CO0 citations63
US10964693B2Mar 30, 2021
Semiconductor device having a plurality of bipolar transistors with different heights between their respective emitter layers and emitter electrodes
MURATA MANUFACTURING CO0 citations63
US12009359B2Jun 11, 2024
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US11949003B2Apr 2, 2024
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US11869957B2Jan 9, 2024
Compound semiconductor device
MURATA MANUFACTURING CO0 citations62
US11830917B2Nov 28, 2023
Unit cell and power amplifier module
MURATA MANUFACTURING CO0 citations62
US11817356B2Nov 14, 2023
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US11705509B2Jul 18, 2023
Heterojunction bipolar transistor
MURATA MANUFACTURING CO0 citations62
US11610883B2Mar 21, 2023
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US11508834B2Nov 22, 2022
Compound semiconductor device
MURATA MANUFACTURING CO0 citations62
US11495563B2Nov 8, 2022
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US11424350B2Aug 23, 2022
Heterojunction bipolar transistor
MURATA MANUFACTURING CO0 citations62
US11329146B2May 10, 2022
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US11227804B2Jan 18, 2022
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US10923470B2Feb 16, 2021
Semiconductor device
MURATA MANUFACTURING CO0 citations62
US10777669B2Sep 15, 2020
Heterojunction bipolar transistor
MURATA MANUFACTURING CO1 citations62
US9444512B2Sep 13, 2016
Semiconductor device and high-frequency module
MURATA MANUFACTURING CO2 citations62
US12308809B2May 20, 2025
Power amplification circuit
MURATA MANUFACTURING CO0 citations52
US11784245B2Oct 10, 2023
Semiconductor device
MURATA MANUFACTURING CO0 citations52
US11289434B2Mar 29, 2022
Semiconductor element and power amplification device
MURATA MANUFACTURING CO0 citations52
US11276689B2Mar 15, 2022
Semiconductor device and amplifier module
MURATA MANUFACTURING CO0 citations52
US11196394B2Dec 7, 2021
Power amplifier module
MURATA MANUFACTURING CO0 citations52
US10855232B2Dec 1, 2020
Power amplifier module
MURATA MANUFACTURING CO0 citations52
US10741680B2Aug 11, 2020
Bipolar transistor and method for producing the same
MURATA MANUFACTURING CO0 citations52
US10665704B2May 26, 2020
Bipolar transistor and radio-frequency power amplifier module
MURATA MANUFACTURING CO0 citations52
KOYA SHIGEKI
2 patentsUS8335479B2Dec 18, 2012
Semiconductor integrated circuit, RF module using the same, and radio communication terminal device using the same
KOYA SHIGEKI52 citations96
US8200167B2Jun 12, 2012
Semiconductor integrated circuit, RF module using the same, and radio communication terminal device using the same
KOYA SHIGEKI8 citations83
HITACHI LTD
1 patentKATOH KAORU
1 patentRENESAS ELECTRONICS CORP
1 patentRENESAS TECH CORP
1 patentShowing the top 50 of 64 patents by PatentIndex Score.