Core Viewpoint - The article emphasizes the critical role of Thermal Interface Materials (TIM) in managing heat dissipation in AI chips, particularly as power densities increase significantly in the era of AI computing [2][3]. Group 1: AI Era Challenges in Chip Thermal Management - The rapid growth of AI model parameters has led to an exponential increase in chip power density, presenting a fundamental engineering challenge for the semiconductor industry [3]. - The total power of GPU packages is projected to rise dramatically, with NVIDIA's B200 GPU exceeding 1000W and future models potentially reaching 15,360W by 2032 [4]. Group 2: Consequences of Ineffective Thermal Management - Poor thermal management can cause irreversible damage to chip systems, including thermal throttling and accelerated wear of metal interconnects, significantly reducing chip lifespan [5]. - A 10°C increase in junction temperature can decrease MOSFET carrier mobility by 2-5%, leading to a substantial drop in device performance [5]. Group 3: Advanced Packaging Technologies and New Challenges - Modern AI chips utilize advanced packaging techniques, integrating multiple chiplets, which complicates thermal management due to increased thermal resistance [6]. - The CoWoS packaging by NVIDIA exemplifies this trend, with unprecedented dimensions and thermal management requirements [6]. Group 4: Strategic Importance of TIM - TIM contributes approximately 30-50% of the total thermal resistance in the heat path from chip to cooling liquid, making its optimization crucial for enhancing system performance [11]. - The effectiveness of cooling systems is limited if heat cannot be efficiently transferred from the chip surface to the cooling plate, highlighting the importance of TIM [8]. Group 5: TIM Layer System - TIM is categorized into three layers: TIM1 (between die and IHS), TIM1.5 (for lidless packages), and TIM2 (between IHS and heatsink), each with specific performance requirements [12][18]. - TIM1 is critical for heat flow density and is primarily composed of high-fill thermal grease and nano-silver sintering materials [16]. Group 6: Market Trends in TIM Materials - The market for TIM materials includes various technologies such as thermal grease, phase change materials, and thermal pads, each with distinct advantages and limitations [22][23][24]. - Liquid metal is emerging as a high-end TIM option due to its superior thermal conductivity, although it faces challenges in material compatibility and long-term reliability [26]. Group 7: Supply Chain of TIM Materials - Key suppliers in the TIM market include Dow, Henkel, DuPont, and Indium Corporation, each offering a range of thermal interface materials tailored for high-performance applications [27][28][29][30]. - The competitive landscape for thermal management materials is evolving, with a focus on innovations in TIM technologies that can meet the demands of next-generation AI infrastructure [56].