Coherent Introduces Bondable Diamond Thermal Spreaders Reducing Interface Resistance by 99%
Coherent Corp. has launched state-of-the-art Bondable Diamond thermal spreaders with specialized surface finishes enabling direct bonding to semiconductor dies up to 100mm square, reducing interface thermal resistance by as much as 99%. The solution supports materials including silicon, SiC, GaN, AlGaN, GaAs and indium phosphide for enhanced device cooling.
1. Event Participation and Strategic Focus
Coherent Corp. will present its full photonics and advanced materials portfolio at SPIE Photonics West in San Francisco from January 20–22, 2026. The company plans to underscore cross-market applications spanning AI datacenter cooling, semiconductor and display capital equipment, life sciences instrumentation, precision manufacturing, and emerging quantum and sensing technologies. According to Chief Marketing Officer Dr. Sanjai Parthasarathi, Photonics West offers a platform to engage with over 23,000 industry professionals, reinforce customer relationships and shape the sector’s development through keynote and panel presentations.
2. Bondable Diamond Thermal Solutions
Coherent introduced bondable diamond heat spreaders engineered with ultra-high thermal conductivity exceeding 1,800 W/m·K. These diamond substrates, available in square die sizes up to 100 mm, feature controlled surface roughness below 5 nm RMS and flatness within 500 nm total indicator reading. Direct fusion and hybrid bonding options reduce interface thermal resistance by up to 99% versus conventional thermal interface materials, enabling GPU and GaN device junction temperatures to drop by as much as 25 °C under 300 W/cm² heat flux.
3. Ultra-Fast Lasers, Fiber Assemblies and Programmable Optics
Key product launches include Sapphire XT, a compact visible laser with integrated controller optimized for super-resolution imaging and quantum sensing; OCT Specialty Fiber Assemblies delivering insertion loss under 0.5 dB and return loss better than 55 dB for catheter-based multimodal clinical systems; and the Waveshaper 1000A Sharp programmable optical filter offering spectral resolution down to 5 GHz FWHM. The FieldMax Touch Pro meter extends handheld laser power measurement to 1 kHz pulse repetition rates with ±0.5% accuracy, tailored for production-line environments.
4. Live Demonstrations and Thought Leadership
Attendees can witness live demonstrations of Coherent’s thermo-electric generation system converting up to 5 kW of datacenter waste heat into usable power, and a CO₂ electro-optic modulator delivering sub-microsecond beam switching for high-throughput PCB via drilling. Coherent will co-present a quantum entropy demonstration with Quside, showcasing a mass-manufacturable vertical-cavity surface-emitting laser providing runtime-verified randomness suitable for next-generation encryption. Executive sessions include a panel on co-packaged optics led by Dr. Parthasarathi and a presentation on >50% efficient Tm-doped fiber lasers for 2 µm systems by Joshua Bradford.