Jukka Viheriälä

Briefly

His research focuses on advanced packaging technologies and heterogeneous integration of photonics and electronics at the system level. He has recently secured highly competitive Rise-to-Challenge national research funding targeting the upscaling of quantum computers through co-integration of cryogenic photonics and electronics. Viheriälä has acted as PI or key contributor in several national and EU-funded projects, contributes actively to research commercialization stemming from Aalto University and Tampere University, and supervises post-graduate and doctoral students. He also serves as Head of the Steering Group of the Micro- and Nanofabrication Center at Tampere University and has played a key role in establishing the EU-level System-in-Package Fabrication (SiPFAB) pilot line for advanced packaging.

Research outputs and activities of the Supervisor

Research group

The Advanced Microelectronics Packaging research group develops technologies for heterogeneous and hybrid integration of photonic and electronic systems, with a strong focus on System-in-Package (SiP) fabrication. The work spans integration of active devices, passive components, substrates, and interconnects into scalable and robust system-level architectures. A key focus is on advanced SiP solutions combining high-power electronics, mixed-signal electronics, and photonics within the same package. This includes co-integration of lasers, photonic integrated circuits, detectors, and driver/readout electronics, enabling compact and high-performance systems. The group has strong engagement in emerging applications, particularly quantum technologies, where co-integrated cryogenic photonics and electronics enable scalable quantum computing platforms. Additional application areas include sensing, high-speed data transfer, and harsh-environment/high-power systems. The work emphasises reliability, manufacturability, and transition from laboratory-scale innovation to pilot-line and industrial deployment, with strong support for technology transfer and commercialization.

Research infrastructure

TAU cleanroom facilities and photonics laboratories, including the SiPFAB (System-in-Package Fabrication) pilot line for advanced packaging and heterogeneous integration, where TAU plays a central role at the EU level. Infrastructure includes state-of-the-art capabilities for die and flip-chip bonding, photonic and electronic co-integration, and system-level assembly. The facilities support advanced characterization, including high-speed electrical and optical measurements as well as cryogenic operation, enabling development of next-generation quantum and photonic systems. The infrastructure is complemented by strong national and European collaboration networks and supports both academic research and industrial innovation, including commercialization activities.