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[6-K] Tower Semiconductor Ltd Current Report (Foreign Issuer)

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Tower Semiconductor and Xscape Photonics announced a validated prototype and a validation kit for the industry’s first monolithically integrated, optically pumped, multi-wavelength on‑chip laser source built on Tower’s PH18 silicon photonics platform. The solution supports CWDM and DWDM wavelength grids and is aimed at AI datacenter fabrics to improve bandwidth density, power efficiency, and scalability by embedding programmable multi‑color lasers on‑chip, optically pumped by a single continuous‑wave external laser. Xscape’s ChromX platform (based on CombX technology) is presented as compatible with existing modulators and detectors to simplify design and reduce component count. The release cites LightCounting projections that sales of optical transceivers and LPO/CPO for AI clusters will exceed $10 billion in 2026 and reach $20 billion by 2030. The statement includes a standard safe harbor noting forward‑looking statements are subject to risks.

Tower Semiconductor e Xscape Photonics hanno annunciato un prototipo convalidato e un kit di validazione per la prima sorgente laser multi‑lunghezza d'onda integrata monoliticamente e pompata otticamente su chip, realizzata sulla piattaforma di fotonica su silicio PH18 di Tower. La soluzione supporta le griglie di lunghezze d'onda CWDM e DWDM ed è pensata per le interconnessioni dei data center AI, per aumentare la densità di banda, l'efficienza energetica e la scalabilità integrando laser programmabili multicolore sul chip, pompati otticamente da un singolo laser esterno a onda continua. La piattaforma ChromX di Xscape (basata sulla tecnologia CombX) è compatibile con modulatori e rivelatori esistenti, semplificando il progetto e riducendo il numero di componenti. Il comunicato cita le proiezioni di LightCounting secondo cui le vendite di transceiver ottici e LPO/CPO per cluster AI supereranno $10 billion in 2026 e raggiungeranno $20 billion by 2030. La dichiarazione include un consueto avviso di safe harbor che indica come le affermazioni prospettiche siano soggette a rischi.

Tower Semiconductor y Xscape Photonics anunciaron un prototipo validado y un kit de validación para la primera fuente láser en chip, multilonqueza y monolíticamente integrada, alimentada ópticamente, construida sobre la plataforma de fotónica en silicio PH18 de Tower. La solución admite las rejillas de longitudes de onda CWDM y DWDM y está dirigida a las redes de centros de datos de IA para mejorar la densidad de ancho de banda, la eficiencia energética y la escalabilidad mediante la integración de láseres multicolor programables en el chip, alimentados ópticamente por un solo láser externo de onda continua. La plataforma ChromX de Xscape (basada en la tecnología CombX) es compatible con moduladores y detectores existentes para simplificar el diseño y reducir el número de componentes. El comunicado cita proyecciones de LightCounting que prevén que las ventas de transceptores ópticos y LPO/CPO para clústeres de IA superarán $10 billion in 2026 y alcanzarán $20 billion by 2030. La declaración incluye la típica advertencia de safe harbor que señala que las manifestaciones prospectivas están sujetas a riesgos.

Tower Semiconductor와 Xscape Photonics는 Tower의 PH18 실리콘 포토닉스 플랫폼 기반으로 업계 최초의 단일 칩 내에서 단일 모놀리식 통합, 광학 펌프 방식의 다중 파장 온칩 레이저 소스에 대한 검증된 프로토타입과 검증 키트를 발표했습니다. 이 솔루션은 CWDM 및 DWDM 파장 그리드를 지원하며 AI 데이터센터 패브릭을 대상으로 대역폭 밀도, 전력 효율성 및 확장성을 향상시키기 위해 설계되었으며, 단일 연속파 외부 레이저로 광학 펌프되는 프로그램 가능한 다색 레이저를 칩에 내장합니다. Xscape의 ChromX 플랫폼(CombX 기술 기반)은 기존 변조기 및 검출기와 호환되어 설계를 단순화하고 부품 수를 줄여줍니다. 보도자료는 LightCounting의 전망을 인용해 AI 클러스터용 광학 트랜시버 및 LPO/CPO 매출이 $10 billion in 2026을 초과하고 $20 billion by 2030에 이를 것으로 예측한다고 전했습니다. 성명에는 전망성 진술이 위험에 노출될 수 있음을 알리는 표준 안전 항구(safe harbor) 고지가 포함되어 있습니다.

Tower Semiconductor et Xscape Photonics ont annoncé un prototype validé et un kit de validation pour la première source laser sur puce monolithiquement intégrée, pompée optiquement et multi‑longueurs d'onde de l'industrie, réalisée sur la plateforme de photonique sur silicium PH18 de Tower. La solution prend en charge les grilles de longueurs d'onde CWDM et DWDM et vise les infrastructures de centres de données IA afin d'améliorer la densité de bande passante, l'efficacité énergétique et la scalabilité en intégrant des lasers multicolores programmables sur puce, pompés optiquement par un seul laser externe en onde continue. La plateforme ChromX de Xscape (basée sur la technologie CombX) est présentée comme compatible avec les modulateurs et détecteurs existants pour simplifier la conception et réduire le nombre de composants. Le communiqué cite des projections de LightCounting selon lesquelles les ventes de transceivers optiques et de LPO/CPO pour les clusters IA dépasseront $10 billion in 2026 et atteindront $20 billion by 2030. La déclaration inclut un avertissement standard de safe harbor précisant que les déclarations prospectives sont soumises à des risques.

Tower Semiconductor und Xscape Photonics haben einen validierten Prototyp und ein Validierungskit für die erste monolithisch integrierte, optisch gepumpte, mehrwellige On‑Chip‑Laserquelle der Branche angekündigt, die auf Towers PH18 Silicon‑Photonics‑Plattform basiert. Die Lösung unterstützt CWDM‑ und DWDM‑Wellenlängengitter und richtet sich an KI‑Rechenzentrums‑Fabrics, um Bandbreitendichte, Energieeffizienz und Skalierbarkeit zu verbessern, indem programmierbare Mehrfarbenlaser on‑chip integriert werden, die optisch von einem einzigen externen Dauerstrichlaser gepumpt werden. Xscapes ChromX‑Plattform (auf Basis der CombX‑Technologie) ist mit bestehenden Modulatoren und Detektoren kompatibel, um das Design zu vereinfachen und die Anzahl der Komponenten zu reduzieren. Die Mitteilung zitiert Prognosen von LightCounting, wonach der Umsatz mit optischen Transceivern und LPO/CPO für KI‑Cluster $10 billion in 2026 übersteigen und bis $20 billion by 2030 erreichen wird. Die Erklärung enthält einen üblichen Safe‑Harbor‑Hinweis, dass zukunftsgerichtete Aussagen Risiken unterliegen.

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Insights

TL;DR: Monolithic multi‑wavelength on‑chip lasers on a high‑volume silicon photonics platform could materially simplify AI datacenter optical fabric design.

The announcement describes a technically meaningful prototype: a programmable, optically pumped multi‑color laser integrated on Tower’s PH18 platform supporting CWDM/DWDM. That integration removes the need for hybrid III‑V laser sourcing or multiple external lasers, which can lower assembly complexity and potentially improve reliability for GPU‑to‑GPU and GPU‑to‑HBM links. Compatibility with existing modulators and detectors on PH18 is commercially important because it enables a clearer path from prototyping to volume production on a multi‑sourced foundry ecosystem. The press release does not disclose performance metrics (power, linewidth, channel count, yield) or customer commitments, so technical viability at scale remains to be proven.

TL;DR: The product targets a high‑growth optical interconnect market, but no revenue, customers, or timelines are provided to quantify near‑term financial impact.

Tower and Xscape position the offering for AI datacenter fabrics and cite LightCounting market projections of >$10B in 2026 and $20B by 2030, signalling a large addressable market. The release highlights manufacturability via Tower’s PH18 and a validation kit availability, which is relevant for adoption cadence. However, the disclosure omits revenue guidance, customer design wins, production readiness metrics, and cost or margin implications. Investors should note the press release contains forward‑looking statements and does not provide quantifiable financial outcomes.

Tower Semiconductor e Xscape Photonics hanno annunciato un prototipo convalidato e un kit di validazione per la prima sorgente laser multi‑lunghezza d'onda integrata monoliticamente e pompata otticamente su chip, realizzata sulla piattaforma di fotonica su silicio PH18 di Tower. La soluzione supporta le griglie di lunghezze d'onda CWDM e DWDM ed è pensata per le interconnessioni dei data center AI, per aumentare la densità di banda, l'efficienza energetica e la scalabilità integrando laser programmabili multicolore sul chip, pompati otticamente da un singolo laser esterno a onda continua. La piattaforma ChromX di Xscape (basata sulla tecnologia CombX) è compatibile con modulatori e rivelatori esistenti, semplificando il progetto e riducendo il numero di componenti. Il comunicato cita le proiezioni di LightCounting secondo cui le vendite di transceiver ottici e LPO/CPO per cluster AI supereranno $10 billion in 2026 e raggiungeranno $20 billion by 2030. La dichiarazione include un consueto avviso di safe harbor che indica come le affermazioni prospettiche siano soggette a rischi.

Tower Semiconductor y Xscape Photonics anunciaron un prototipo validado y un kit de validación para la primera fuente láser en chip, multilonqueza y monolíticamente integrada, alimentada ópticamente, construida sobre la plataforma de fotónica en silicio PH18 de Tower. La solución admite las rejillas de longitudes de onda CWDM y DWDM y está dirigida a las redes de centros de datos de IA para mejorar la densidad de ancho de banda, la eficiencia energética y la escalabilidad mediante la integración de láseres multicolor programables en el chip, alimentados ópticamente por un solo láser externo de onda continua. La plataforma ChromX de Xscape (basada en la tecnología CombX) es compatible con moduladores y detectores existentes para simplificar el diseño y reducir el número de componentes. El comunicado cita proyecciones de LightCounting que prevén que las ventas de transceptores ópticos y LPO/CPO para clústeres de IA superarán $10 billion in 2026 y alcanzarán $20 billion by 2030. La declaración incluye la típica advertencia de safe harbor que señala que las manifestaciones prospectivas están sujetas a riesgos.

Tower Semiconductor와 Xscape Photonics는 Tower의 PH18 실리콘 포토닉스 플랫폼 기반으로 업계 최초의 단일 칩 내에서 단일 모놀리식 통합, 광학 펌프 방식의 다중 파장 온칩 레이저 소스에 대한 검증된 프로토타입과 검증 키트를 발표했습니다. 이 솔루션은 CWDM 및 DWDM 파장 그리드를 지원하며 AI 데이터센터 패브릭을 대상으로 대역폭 밀도, 전력 효율성 및 확장성을 향상시키기 위해 설계되었으며, 단일 연속파 외부 레이저로 광학 펌프되는 프로그램 가능한 다색 레이저를 칩에 내장합니다. Xscape의 ChromX 플랫폼(CombX 기술 기반)은 기존 변조기 및 검출기와 호환되어 설계를 단순화하고 부품 수를 줄여줍니다. 보도자료는 LightCounting의 전망을 인용해 AI 클러스터용 광학 트랜시버 및 LPO/CPO 매출이 $10 billion in 2026을 초과하고 $20 billion by 2030에 이를 것으로 예측한다고 전했습니다. 성명에는 전망성 진술이 위험에 노출될 수 있음을 알리는 표준 안전 항구(safe harbor) 고지가 포함되어 있습니다.

Tower Semiconductor et Xscape Photonics ont annoncé un prototype validé et un kit de validation pour la première source laser sur puce monolithiquement intégrée, pompée optiquement et multi‑longueurs d'onde de l'industrie, réalisée sur la plateforme de photonique sur silicium PH18 de Tower. La solution prend en charge les grilles de longueurs d'onde CWDM et DWDM et vise les infrastructures de centres de données IA afin d'améliorer la densité de bande passante, l'efficacité énergétique et la scalabilité en intégrant des lasers multicolores programmables sur puce, pompés optiquement par un seul laser externe en onde continue. La plateforme ChromX de Xscape (basée sur la technologie CombX) est présentée comme compatible avec les modulateurs et détecteurs existants pour simplifier la conception et réduire le nombre de composants. Le communiqué cite des projections de LightCounting selon lesquelles les ventes de transceivers optiques et de LPO/CPO pour les clusters IA dépasseront $10 billion in 2026 et atteindront $20 billion by 2030. La déclaration inclut un avertissement standard de safe harbor précisant que les déclarations prospectives sont soumises à des risques.

Tower Semiconductor und Xscape Photonics haben einen validierten Prototyp und ein Validierungskit für die erste monolithisch integrierte, optisch gepumpte, mehrwellige On‑Chip‑Laserquelle der Branche angekündigt, die auf Towers PH18 Silicon‑Photonics‑Plattform basiert. Die Lösung unterstützt CWDM‑ und DWDM‑Wellenlängengitter und richtet sich an KI‑Rechenzentrums‑Fabrics, um Bandbreitendichte, Energieeffizienz und Skalierbarkeit zu verbessern, indem programmierbare Mehrfarbenlaser on‑chip integriert werden, die optisch von einem einzigen externen Dauerstrichlaser gepumpt werden. Xscapes ChromX‑Plattform (auf Basis der CombX‑Technologie) ist mit bestehenden Modulatoren und Detektoren kompatibel, um das Design zu vereinfachen und die Anzahl der Komponenten zu reduzieren. Die Mitteilung zitiert Prognosen von LightCounting, wonach der Umsatz mit optischen Transceivern und LPO/CPO für KI‑Cluster $10 billion in 2026 übersteigen und bis $20 billion by 2030 erreichen wird. Die Erklärung enthält einen üblichen Safe‑Harbor‑Hinweis, dass zukunftsgerichtete Aussagen Risiken unterliegen.



UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K
 
REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
OF THE SECURITIES EXCHANGE ACT OF 1934
 
For the month of August 2025 No.5

Commission File Number 0-24790

TOWER SEMICONDUCTOR LTD.
(Translation of registrant's name into English)

Ramat Gavriel Industrial Park
P.O. Box 619, Migdal Haemek, Israel 2310502
(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒        Form 40-F ☐


On August 25, 2025, the Registrant and Xscape Photonics Unveiled the
Industry’s First Optically Pumped On-Chip Multi-Wavelength Laser
Platform for AI Datacenter Fabrics


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

  TOWER SEMICONDUCTOR LTD.  
       
Date: August 25, 2025
By:
/s/ Nati Somekh  
   
Name:  Nati Somekh
 
   
Title:    Corporate Secretary
 



Xscape Photonics and Tower Semiconductor Unveil the Industry’s First Optically Pumped
On-Chip Multi-Wavelength Laser Platform for AI Datacenter Fabrics

Monolithically integrated, optically pumped, programmable multi-color laser built on Tower’s PH18
platform enables scalable CWDM/DWDM optical fabrics for disaggregated AI clusters
 
MIGDAL HAEMEK, Israel and SANTA CLARA, Calif. – Aug. 25, 2025 - Tower Semiconductor (NASDAQ/TASE: TSEM), a leading foundry of high-value analog semiconductor solutions, and Xscape Photonics, a U.S.-based innovator in advanced photonic interconnects funded by industry leaders such as NVIDIA and Cisco, today announced the successful prototyping and validation kit availability of the industry’s first on-chip, optically pumped, multi-wavelength laser source. Built on Tower’s mature, high-volume PH18 Silicon Photonics platform, the solution supports CWDM and DWDM wavelength grids and is tailored for AI datacenter fabrics, where bandwidth density, power efficiency, and scalability are essential.

The optical interconnect market for AI datacenters is expected to grow, driven by the rising demand for high-speed, low-latency connectivity in hyperscale AI deployments. According to LightCounting, sales of optical transceivers and LPO/CPO for AI clusters are expected to reach more than $10 billion in 2026, double the size of sales in 2024. LightCounting projects these sales to reach $20 billion by 2030.

This breakthrough from Tower Semiconductor and Xscape Photonics enables a path toward high performance, high reliability, lower cost and a simplified supply chain by monolithically embedding programmable multi-color lasers on-chip, pumped optically by a single CW external laser. It also eliminates the need to source for multiple externally modulated lasers or require hybrid III-V integration. Xscape Photonics’ solution simplifies design, reduces latency and component count, and is especially impactful for GPU-to-GPU and GPU-to-HBM optical links in AI clusters. Leveraging Tower’s high-volume modular PH18 platform, the solution offers a seamless upgrade path for existing customers, fully compatible with established photonic components such as modulators and detectors.

“Our close collaboration with Tower has allowed us to bring to market a highly differentiated, manufacturable, and scalable solution,” said Vivek Raghunathan, CEO of Xscape Photonics. “By building on Tower’s proven and qualified high-volume PH18 platform, we’ve eliminated the need for costly hybrid laser integration and delivered the first monolithically integrated, multi-color laser source directly on-chip. This will transform how AI fabrics are architected going forward.”
Xscape Photonics is developing a multi-color laser platform, ChromX, based on its proprietary CombX technology, a programmable laser source device that allows end users—especially those already designing with Tower’s PH18 platform—to easily integrate high-performance laser sources, significantly reducing packaging complexity and component count. The laser source is compatible with existing silicon photonic modulators and detectors, opening a seamless path toward fully integrated optical interconnect for AI data center fabrics.

“We are excited to partner with Xscape Photonics in bringing this first-of-its-kind innovation to life,” said Ed Preisler, Vice President and GM of Tower Semiconductor’s RF Business Unit. “Tower’s multi-sourced and high-volume silicon photonics platform has once again demonstrated its ability to support advanced custom solutions for AI and datacenter customers at scale. This new solution exemplifies how our flexible, modular technology ecosystem enables rapid prototyping and high-volume production adoption for emerging AI and data-driven markets.”

For additional information about the company’s RF platform offering, visit here.

About Tower Semiconductor
Tower Semiconductor Ltd. (NASDAQ/TASE: TSEM), the leading foundry of high-value analog semiconductor solutions, provides technology, development, and process platforms for its customers in growing markets such as consumer, industrial, automotive, mobile, infrastructure, medical and aerospace and defense. Tower Semiconductor focuses on creating a positive and sustainable impact on the world through long-term partnerships and its advanced and innovative analog technology offering, comprised of a broad range of customizable process platforms such as SiGe, BiCMOS, mixed-signal/CMOS, RF CMOS, CMOS image sensor, non-imaging sensors, displays, integrated power management (BCD and 700V), photonics, and MEMS. Tower Semiconductor also provides world-class design enablement for a quick and accurate design cycle as well as process transfer services including development, transfer, and optimization, to IDMs and fabless companies. To provide multi-fab sourcing and extended capacity for its customers, Tower Semiconductor owns one operating facility in Israel (200mm), two in the U.S. (200mm), two in Japan (200mm and 300mm) which it owns through its 51% holdings in TPSCo, shares a 300mm facility in Agrate, Italy with STMicroelectronics as well as has access to a 300mm capacity corridor in Intel’s New Mexico factory. For more information, please visit: www.towersemi.com.

Safe Harbor Regarding Forward-Looking Statements
This press release includes forward-looking statements, which are subject to risks and uncertainties. Actual results may vary from those projected or implied by such forward-looking statements. A complete discussion of risks and uncertainties that may affect the accuracy of forward-looking statements included in this press release or which may otherwise affect Tower’s business is included under the heading “Risk Factors” in Tower’s most recent filings on Forms 20-F, F-3, F-4 and 6-K, as were filed with the Securities and Exchange Commission (the “SEC”) and the Israel Securities Authority. Tower does not intend to update, and expressly disclaim any obligation to update, the information contained in this release. 

About Xscape Photonics
Xscape Photonics develops custom photonic platform solutions designed for ultra-high bandwidth connections inside data centers to power Agentic AI systems. The company's proprietary ChromX platform targets scaling of AI computing performance in an environmentally sustainable manner and is optimized for power, cost, scale and reliability. The company recently announced the availability of EagleX, its technology evaluation kit.  To learn more, follow us on LinkedIn or visit xscapephotonics.com.

###

Tower Semiconductor Company Contact:  Orit Shahar | +972-74-7377440 | oritsha@towersemi.com
Tower Semiconductor Investor Relations Contact:  Liat Avraham | +972-4-6506154 | liatavra@towersemi.com


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