AlN HTCC Package & Heat Sink for Optical Modules

In high-speed optical modules, thermal management and protection must be addressed simultaneously. The aluminum nitride HTCC package optical module​ combines AlN's high thermal conductivity with hermeticity through a high-temperature co-fired ceramic (HTCC) process, providing a moisture-proof, dust-proof, and corrosion-resistant sealed environment for TOSA/ROSA cavities and outer housings, while also meeting the low-loss transmission requirements for high-frequency signals.

The AlN ceramic housing for transceiver​is a typical product of this process.

Compared with traditional Kovar metal housings, AlN ceramic housings offer both insulation and thermal paths, avoiding the grounding complexity and weight penalties associated with metal shielding cavities. Several suppliers now offer mature HTCC AlN housing solutions across the full 100G–1.6T portfolio, typically with two units per module, making them the mainstream choice for long-haul telecom and high-end data center applications.

For localized heat dissipation, the aluminum nitride heat sink optical transceiver​ sits directly against hot spots on EML lasers or silicon photonics engines, working with thermal interface materials (TIM) to rapidly spread localized heat. Together with the AlN laser diode submount for silicon photonics, it forms a dual-layer thermal path of "submount + heat sink," effectively suppressing temperature buildup within the sealed cavity.

For CPO (co-packaged optics) architectures, the aluminum nitride CPO substrate​ is emerging as a critical base material for switch-side silicon photonics engines. CPO co-packages the optical engine with the ASIC, resulting in heat densities far beyond those of pluggable modules. AlN's high thermal conductivity and CTE matching characteristics further amplify its advantages in this scenario. Driven by overall demand for the high thermal conductivity AlN substrate data center, the combination of HTCC housings, localized heat sinks, and CPO substrates is forming three high-value incremental markets for AlN in the optical module sector.

Xiamen Juci specializes in manufacturing High Purity AlN Powder, AlN Granule, Thermal Conductive Filler, and AlN Ceramics—products that have earned consistent recognition and positive feedback from customers worldwide. Should you have any requirements, please do not hesitate to contact us.

Contact: Jenny Qin / 진현혜 

Phone: +86 151-5177-8700

Wechat ID: JENNY-8866

Xiamen Juci Technology Co., Ltd.

Email: qinxianhui@chinajuci.com

Website: www.jucialnglobal.com