RDIMMs for Liquid Immersion Servers

Conformally Coated RDIMMs

Challenges with Standard RDIMMs in Liquid Immersion

When exposed to dielectric fluids used in liquid immersion cooling, standard RDIMMs may experience:

• Corrosion due to changes in the physical and chemical properties of the PCB and electrical components
• Fading of component markings, making identification difficult
• Degradation of module labels, hindering tracking and inventory management

Benefits of Conformally Coated RDIMMs

By using conformally coated DDR5 RDIMMs from SMART Modular in liquid immersion servers, data centers can:

• Ensure long-term reliability of memory modules in liquid cooling environments
• Maintain component and module identification for easier maintenance and tracking
• Maximize the benefits of liquid immersion cooling without compromising memory performance

Key Features of SMART’s Conformal Coating Process

To address these challenges, SMART Modular applies a conformal coating to DDR5 RDIMMs specifically designed for use in liquid immersion servers. This thin polymeric film conforms to the printed circuit board, providing comprehensive protection for the module’s components.

• Applied at a thickness of 25-250μm
• Protects against liquid, moisture, dust, and corrosive chemicals like sulfur dioxide
• Utilizes in-house, leading-edge equipment with a fully automated spray application
• Uses high-quality acrylic, polyurethane, silicone, and epoxy coating materials

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Conformally coated DDR5 RDIMMs in this innovative product line represent a critical component in the successful implementation of liquid immersion cooling solutions, helping data centers address power and heat challenges while maintaining system reliability and performance.