IN Brief:
- GlobalFoundries announced the FDX Fusion FD-SOI process roadmap on 9 October.
- The company targets seven-nanometre-class digital performance alongside mixed-signal integration.
- GlobalFoundries plans to begin manufacturing the technology in Dresden in 2028.
GlobalFoundries has unveiled FDX Fusion, a future fully depleted silicon-on-insulator semiconductor process platform intended to combine advanced digital capability with functions needed for sensing, communication and control in physical AI systems.
The roadmap was announced on 9 October. GlobalFoundries expects the first FDX Fusion generation to deliver seven-nanometre-class digital performance and plans to commence manufacturing the technology at its Dresden facility in Germany during 2028. Those are development and manufacturing targets, not specifications verified on production devices currently available to customers.
FD-SOI uses a thin active silicon layer separated from the underlying substrate by a buried insulator. The resulting transistor structure offers different electrostatic and leakage characteristics from conventional bulk silicon implementations, making it one option for systems balancing digital processing with power and analogue requirements.
The company is positioning FDX Fusion as an extension of its existing FDX process technology rather than a conventional leading-edge logic-node announcement. Its stated target concerns the level of digital performance it expects to achieve alongside functions that are difficult to combine on a process designed exclusively around dense digital logic.
Mixed-signal devices bring analogue measurement or control functions together with digital computation. An industrial sensor interface, for example, may require low-noise signal conditioning, analogue-to-digital conversion, processing, non-volatile memory and a communication channel. Each function imposes different electrical and layout constraints.
RF circuits face requirements unlike those of ordinary digital logic. Gain, noise, linearity, parasitic capacitance and interconnect effects influence how well an amplifier or transceiver operates. Placing RF and digital components on a common semiconductor platform can reduce some external connections but also introduces integration compromises that must be resolved at circuit and process level.
Embedded memory adds another set of design considerations, including retention, endurance, programming conditions and interactions with surrounding fabrication steps. A process roadmap that promises logic, analogue and memory integration must ultimately provide device models and qualified manufacturing rules supporting each function.
GlobalFoundries describes its target applications using the sequence sense, think, act and communicate. Such devices interact directly with their surroundings, rather than processing large datasets only in central computing infrastructure. Their circuitry may require a combination of local processing, physical interfaces and energy-efficient communications.
The company's use of the term physical AI does not establish a single standard semiconductor architecture. Equipment such as industrial control hardware, robotic systems and connected sensors can have very different duty cycles, environmental conditions and safety constraints, affecting the components that designers choose.
Fabrication technology is only part of the integration challenge. Circuit designers need accurate transistor and passive-device models, supported libraries and rules covering how physical structures can be placed and connected. They must also consider manufacturing variability, reliability and test requirements when moving from a roadmap to a qualified chip design.
Dresden is the planned manufacturing location for FDX Fusion, but the process announcement must be distinguished from GlobalFoundries' separately announced SPRINT construction milestone. The factory expansion concerns future wafer capacity, while FDX Fusion describes the process capabilities GlobalFoundries intends to develop for devices made at the site.
The roadmap establishes the direction of the FD-SOI portfolio and a proposed manufacturing start. It does not identify customer production tape-outs, validated yield figures or volume shipments of FDX Fusion devices, and such milestones should not be inferred from the company's investment in the Dresden facility.
The proposed 2028 start makes the availability date an important distinction for equipment developers planning present-generation products. Circuit selection for a current design requires an available process design kit and established qualification evidence; the October FDX Fusion roadmap does not yet provide a basis for claiming those production resources are available.
Engineers evaluating the eventual platform will need published electrical characteristics, design enablement tools and silicon results before comparing it with alternative processes. The disclosed timetable leaves further process development and manufacturing qualification ahead before the technology can support commercial device production.
