Key Findings
imec, a global leader in semiconductor research, has unveiled a groundbreaking high-density Metal-Insulator-Metal Capacitor (MIMCAP) RF interposer tailored for advanced high-frequency RF systems. This innovative platform is specifically designed for highly demanding applications such as D-band and above millimeter-wave and sub-terahertz (THz) wireless front-ends, as well as high-speed data center links requiring data transmission at hundreds of gigahertz (GHz). It critically focuses on areas where compact passive components, predictable layout-dependent behavior, and state-of-the-art packaging technology are essential. This enables seamless integration between CMOS, III-V semiconductors, and photonic dies, dramatically boosting the performance of next-generation communication systems.
Technical & Economic Details
The MIMCAP RF interposer facilitates high-density integration while maintaining the integrity of high-frequency signals. MIMCAPs, with their excellent quality factor (Q-factor) and stable capacitance values, are indispensable passive components for impedance matching and filtering in RF circuits. imec’s new platform achieves high-density integration of these MIMCAPs on the interposer, significantly reducing the RF system’s footprint and improving its power efficiency. For millimeter-wave and sub-THz bands at D-band (110-170 GHz) and beyond, high-precision packaging and interconnect technologies are crucial to minimize signal loss. This interposer has the capability to ‘bridge’ chiplets fabricated with diverse materials and process technologies—such as CMOS logic, high-performance III-V semiconductors (e.g., GaN, GaAs-based HBTs and HEMTs), and photonic dies for optical signal processing—with high-speed, reliable electrical or optical connections. This allows for extracting optimal performance from each chiplet while reducing overall system complexity.
Background & Context
The realization of next-generation communication systems beyond 5G, particularly 6G and Beyond 5G, critically hinges on the utilization of millimeter-wave and sub-THz bands at D-band and higher. While these frequency bands allow for transmitting vast amounts of data at high speeds, they are characterized by short transmission distances and strong line-of-sight propagation, necessitating high-density, low-loss RF front-ends and antenna technologies. In data centers, the increasing workload from AI and High-Performance Computing (HPC) demands inter-chip communication at hundreds of GHz data rates. Traditional packaging technologies have struggled to effectively integrate multiple heterogeneous chiplets at such ultra-high frequencies. imec’s MIMCAP RF interposer offers an innovative solution to these formidable challenges, accelerating the evolution of the communication and data center industries.
Strategic Significance & Outlook
imec’s high-density MIMCAP RF interposer technology holds the potential to dramatically enhance the performance of wireless communication systems and high-speed data center links across the D-band millimeter-wave and sub-THz spectrum. The ability to integrate III-V semiconductors with CMOS and photonics will open new avenues for the design of next-generation transceivers, radars, and sensor systems. As this technology advances toward commercialization, it is expected to enable faster, lower-latency wireless communication, leading to revolutionary applications in areas such as autonomous driving, augmented/virtual reality (AR/VR), and terabit-scale data centers. imec’s continuous R&D efforts will expedite the market introduction of these technologies, playing a vital role in shaping the future of global digital infrastructure.
Source: https://passive-components.eu/imec-presents-high-density-mimcap-rf-interposer-for-iii-v-chiplets/
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