Tower Semiconductor Ltd. (NASDAQ / TASE: TSEM)

2. Core Business Model & Operations

Tower Semiconductor operates as a pure-play specialty foundry. It does not sell standard, off-the-shelf branded semiconductor chips to end consumers. Instead, its revenue model is built on:

• Customer Co-Development and Fabrication: Manufacturing custom silicon wafers designed by customer engineering teams using Tower's proprietary, specialized process technologies.
• Process Transfer and Customization: Transferring proprietary customer manufacturing flows into Tower's fabrication facilities, optimizing yield, and scaling them to mass production.
• Turnkey Manufacturing and Design Support: Offering complete design kits (PDKs), multi-project wafer (MPW) prototyping runs, device modeling, intellectual property (IP) blocks, and post-fabrication test services.

3. Technology Platforms & Specialized Manufacturing Offerings

Tower Semiconductor develops and deploys specialized process platforms across multiple silicon wafer sizes (200mm and 300mm), serving diverse high-growth sectors:

A. Radio Frequency (RF) and High-Performance Analog (HPA)

• Silicon-Germanium (SiGe) BiCMOS: Integrates high-speed heterojunction bipolar transistors with standard CMOS. Used in optical transceivers, radar systems, high-speed wireline transceivers, and satellite communications requiring low noise figures and cutoff frequencies exceeding 300 GHz.
• RF SOI (Silicon-on-Insulator): Enables low-loss, high-linearity RF front-end modules, antenna switches, low-noise amplifiers (LNAs), and power amplifiers for 5G/6G mobile devices, Wi-Fi connectivity, and IoT infrastructure.
• RF CMOS: Cost-effective analog and mixed-signal radio frequency process technologies for consumer and industrial wireless transmitters and receivers.

B. Silicon Photonics (SiPho)

• Integrated Photonic ICs (PICs): Combines photonic components (waveguides, modulators, photodetectors) on silicon substrates to enable high-bandwidth optical data transmission.
• Heterogeneous Integration & Co-Packaged Optics (CPO): High-speed optical transceivers designed for hyperscale data centers, AI compute clusters, and optical interconnects.
• Emerging Quantum & AI Platforms: Manufacturing capabilities supporting ultra-low-loss silicon nitride (SiN) waveguides and optical engines for next-generation quantum computing and optical neural networks.

C. Power Management and BCD (Bipolar-CMOS-DMOS)

• High-Voltage BCD Technologies: Monolithic integration of standard CMOS logic, bipolar analog control circuits, and DMOS power transistors on a single die, supporting voltage ranges from 5V up to several hundred volts.
• Applications: Power management ICs (PMICs), battery management systems (BMS), DC-DC converters, motor drivers, and power distribution units for electric vehicles (EVs) and industrial equipment.
• Galvanic Isolation & Smart Power: Specialized substrate and isolation techniques to withstand high breakdown voltages and harsh operating temperatures.

D. CMOS Image Sensors (CIS) & Non-Imaging Sensors

• Custom Pixel Design & High-End CIS: Advanced pinned-photodiode pixels offering low dark current, high dynamic range (HDR), global shutter functionality, and low noise.
• End-Use Markets: Medical X-ray sensors (large-format flat panels), dental radiography, industrial machine vision, automotive Advanced Driver Assistance Systems (ADAS), traffic monitoring, and scientific imaging.
• Stacking and 3D Integration: Wafer-to-wafer and die-to-wafer bonding configurations that separate the sensing pixel array from the underlying signal processing logic.

E. Micro-Electro-Mechanical Systems (MEMS) & Transducers

• MEMS Manufacturing: Fabrication of physical, acoustic, and environmental transducers integrated with CMOS circuitry.
• Products Supported: Microphones, pressure sensors, micro-mirrors for LiDAR and projection systems, RF MEMS resonators, and microfluidic/bio-sensor chips for diagnostic medical devices.

F. Mixed-Signal CMOS & Embedded Non-Volatile Memory (eNVM)

• Embedded Memory Options: Integration of embedded Flash, One-Time-Programmable (OTP), and Multiple-Time-Programmable (MTP) non-volatile memory arrays into standard analog/logic flows.
• Applications: Smart cards, microcontrollers, sensor readout ICs, and ultra-low-power consumer devices.

4. Foundry Services and Design Enablement

To support customers from concept through production, Tower Semiconductor provides an integrated suite of technical services:

A. Design Enablement & EDA Support

• Process Design Kits (PDKs): Comprehensive toolkits configured for major Electronic Design Automation (EDA) platforms (e.g., Cadence, Synopsys, Siemens EDA), featuring verified design rule checking (DRC), layout-versus-schematic (LVS), and parasitic extraction.
• Accurate Device Modeling: Advanced compact models (BSIM, PSP, HICUM) that capture RF noise, thermal behavior, non-linear distortion, and statistical process variations.
• Silicon-Verified IP: Silicon-proven foundation IP including I/O cells, standard logic libraries, bandgaps, voltage references, and ADC/DAC converters.

B. Multi-Project Wafer (MPW) Shuttle Runs

• Regularly scheduled MPW runs that allow multiple customers to share mask costs on single wafer lots, facilitating cost-effective prototyping, silicon validation, and low-volume proof-of-concept testing.

C. Aerospace & Defense Trusted Foundry Services

• On-shore manufacturing capabilities in the United States compliant with ITAR (International Traffic in Arms Regulations) and defense security standards, providing secure fabrication of mission-critical communication, radar, and imaging components.

5. Global Manufacturing Infrastructure

Tower Semiconductor operates a distributed network of 200mm (8-inch) and 300mm (12-inch) fabrication facilities across three continents:

| Facility Location | Wafer Size | Primary Process Capabilities | | :--- | :--- | :--- | | Migdal HaEmek, Israel (Fab 2) | 200mm | CMOS, Mixed-Signal, Power Management, Specialized Sensor Technologies | | Newport Beach, California, USA (Fab 3) | 200mm | SiGe BiCMOS, RF Analog, Silicon Photonics, MEMS, ITAR/Aerospace Platforms | | San Antonio, Texas, USA (Fab 9) | 200mm | High-Voltage BCD, Advanced Power Management, Mixed-Signal CMOS | | Tonami & Uozu, Japan (TPSCo) | 200mm / 300mm | High-Density Image Sensors, 300mm Power Management, 45nm/65nm RF CMOS | | Agrate, Italy (Fab 11 - Partner Facility) | 300mm | Shared 300mm fab structure (with STMicroelectronics) for Analog/Power/BCD |

Note: TPSCo (Tower Partners Semiconductor Co., Ltd.) is a Japanese manufacturing partnership in which Tower Semiconductor holds a 51% controlling majority stake, with Nuvoton Technology Corporation holding 49%.

6. Target Markets & Applications

Tower Semiconductor's manufacturing solutions power products in several global industries:

• Mobile Communications & Wireless: RF switches, power amplifiers, and antenna tuners inside 5G smartphones, base stations, and satellite links.
• Automotive & Electrification: Battery management ICs, motor controllers, LiDAR transceivers, radar front-ends, and in-cabin sensing systems.
• Datacenter Infrastructure & AI Hardware: Silicon photonic transceivers and optical transimpedance amplifiers (TIAs) facilitating high-speed data interconnects.
• Healthcare & Medical Technology: Large-area digital X-ray detectors, ultrasound beamformers, and endoscopy sensors.
• Industrial & Smart Grid: Factory automation controllers, high-voltage switch-mode power supplies, and environmental monitoring sensors.
• Aerospace & Defense: High-reliability RF receivers, secure communication links, and thermal/infrared imaging modules.