- u-blox ag GPS communications
- U-Chip Technology Corp. SRAMs, NVMs, micro-controllers, audio power amplifier
- U-L-M PHOTONICS GMBH VCSEL (Vertical Cavity Surface Emitting Laser)
- u-Nav Microelectronics GPS chipsets
• acquired by Atheros Communications
- U.R.T. [United Radiant Technology Corporation] LCDs
- UB Video, Inc. video compression
- Uber Technologies, Inc. self driving technologies, LiDAR sensors
- Ubicom communications
- Ubidyne digital radios
- Ubilite Inc. Low Power Wi-Fi SoCs
- Ubilux Optoelectronics Corporation LED Epiwafers & LED chips on wafers
- Ubiquisys Ltd. femtocells
• acquired by Cisco Systems Inc.
- Ucomm IC testing
- UDC [Universal Display Corporation] OLEDs
- Udhaya Semiconductors Ltd photovoltaics, Crystalline Silicon
- UDT Sensors sensors, photodiodes
- UE Solar Co., Ltd. photovoltaics
- UEC [United Epitaxy Company Ltd.] VCSELs, epitaxial wafers
- Uhnder, Inc. digital radars for autonomous mobility
- Ulis silicon infrared imaging sensors
- ULM PHOTONICS optoelectronics
- UltraChip Inc. LCD drivers
- Ultrahaptics™ Limited ultrasonic free-space haptic technology
• relaunched as UltraLeap Inc.
- UltraLeap Inc. tracking and haptic technologies
- UltraRAM™ [QuInAs Technology Limited] non-volatile (combined DRAM and flash) computer memories
- UltraRF Inc. LDMOS RF semiconductors
• now Cree Microwave
- UltraSense Systems Inc. TouchPoint sensors
- UltraSoC Technologies Ltd. RISC-V processor trace IPs
• acquired by Siemens AG
- UMC [United Microelectronics] memories, microcontrollers
• check UMC too!
• for consumer ICs check Novatek!
- Umicore USA Inc. wafers
- UMS [United Monolithic Semiconductors] GaAs MMICs
- Unaxis Semiconductors
- Uni Light Technology expitxial wafers
- Unictron Technologies Corporation [UTC] chip antennas and piezoelectric ceramics
- Unichip Corp. processors, tranceivers
- Unikorn Semiconductor Corporation III-V foundry service
- UniLite Corporation. LEDs
- Union Optotronics Corp
- Union Semiconductor Inc. regulators, DC/DC converters, ESD protection, analog switches & multiplexers
- Union Semiconductor Technology Corporation memories
- Unipac Optoelectronics Corp. LCDs
• now AU Optronics
- UniPixel Inc. TMOS displays
- Uniroyal Optoelectronics [UOE] LED wafer foundry
- Uniroyal Technology Corporation [UTC]
- Unisantis Electronics three dimensional Semiconductors, SGT (Surrounding Gate Transistor), dynamic flash memories (DFM)
- Unisem
• acquired by International Rectifier Corporation
• acquired by Infineon Technologies AG
- Unisem (M) Berhad semiconductor assembly and test services
- Unisoc Communications Inc. communications & IoT
- Unisonic Technology [UTC] analog ICs
- United Epitaxy Company Ltd. [UEC] VCSELs, epitaxial wafers
- United Microelectronics [UMC] memories, microcontrollers
• check UMC too!
• for consumer ICs check Novatek!
- United Monolithic Semiconductors [UMS] GaAs MMICs
- United Radiant Technology Corporation LCDs
- United Renewable Energy [URE] photovoltaics
- United Semiconductor Japan Co., Ltd. wafer foundry
- United Silicon Carbide Inc. [UnitedSiC] SiC FETs, SiC JFETs, schottky diodes, custom SiC
• acquired by Qorvo Inc.
- United Solar Ovonic photovoltaics, Amorphous Silicon Thin Film
- United Technologies
• merged with Raytheon Company into Raytheon Technologies Corp.
- United Wireless Ltd.
• acquired by Stadium United Wireless Ltd. M2M wireless devices
- UnitedSiC [United Silicon Carbide Inc.] SiC FETs, SiC JFETs, schottky diodes, custom SiC
- Unitrode
• diodes, transistors, thyristors: Microsemi
• all other products: Texas Instruments Semiconductors
- Unity Opto Technology LEDs, infrared
- Unity Semiconductor Corp. non-volatile resistive RAMs (RRAM)
• acquired by Rambus Inc.
- Universal Display Corporation [UDC] OLEDs
- Universal Scientific Industrial Inc. electronic manufacturing services
- Universal Semiconductor Inc. [USI] Analog and Mixed Signal ASICs, Mask Programmable Arrays, Schottky Diode Networks, ESD protection ICs, MOSFETs, MEMs foundry, CMOS Foundry
- Univision Technology Inc. OLEDs
- UNO Minda Limited automobile components manufacturer, including sensors, horns & batteries
- Untether AI Corporation AI inference accelerators
- UOE [Uniroyal Optoelectronics] LED wafer foundry
- Upek Inc. fingerprint sensor chips
• merged with AuthenTec
• acquired by Apple Inc.
- uPI Semiconductors Corporation MOSFETs, TVS, sensors, DC/DC converters, LED drivers
- URE [United Renewable Energy] photovoltaics
- US Digital Corp. encoders, inclinometers
- USAR Systems keycoders, mousecoders, protocol interpreters
• check Semtech too!
- USEFUL SENSORS iNC. AI-enabled sensor modules
- Usha India Ltd photovoltaics, Crystalline Silicon
- USI [Universal Semiconductor Inc.] Analog and Mixed Signal ASICs, Mask Programmable Arrays, Schottky Diode Networks, ESD protection ICs, MOSFETs, MEMs foundry, CMOS Foundry
- USMikroChips, Inc. hall sensors
• check Melexis too!
- UTC [Unictron Technologies Corporation] chip antennas and piezoelectric ceramics
- UTC [Uniroyal Technology Corporation]
- UTMC [United Technologies Microelectronics] memories, microcontrollers
- Utron Taiwan srams, drams, graphics controllers, clock generators
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