Zheng Quan Shi Bao Wang·2025-09-18 23:55Core Viewpoint - Silicon carbide (SiC) is emerging as a new solution for chip heat dissipation, with Huawei recently announcing two patents related to SiC thermal management [2][6]. Group 1: Huawei's Patents - Huawei has filed two patents involving SiC for thermal management, aimed at enhancing the thermal conductivity of electronic devices [2]. - The first patent focuses on a thermal composition and its applications in electronic component cooling and chip packaging [2]. - The second patent pertains to a thermal absorbing composition for electronic components and circuit boards [2]. Group 2: Industry Trends - NVIDIA is reportedly switching the intermediate substrate material in its next-generation Rubin processors from silicon to SiC to improve heat dissipation, with large-scale adoption expected by 2027 [6]. - SiC has superior thermal conductivity, with a thermal conductivity of 500 W/mK, compared to silicon's 150 W/mK and ceramic substrates' 200-230 W/mK [7]. - The increasing power of AI chips, such as NVIDIA's GPUs, necessitates improved heat dissipation solutions, as the power of the H200 chip has risen from 700W to 1400W [7]. Group 3: Market Potential - The use of SiC intermediate layers can reduce GPU chip junction temperatures by 20-30°C and lower cooling costs by 30%, preventing performance throttling due to overheating [8]. - The market for SiC applications is expanding from power electronics to packaging and cooling solutions, creating new growth opportunities [9]. - A projection indicates that if NVIDIA's H100 chips were to switch to SiC intermediate layers, it would require approximately 76,190 substrates based on current production metrics [9]. Group 4: Stock Market Response - Following NVIDIA's entry into the SiC cooling sector, related stocks in the A-share market have seen significant increases, with companies like Lushou Technology and Tianyue Advanced rising over 30% since September [11]. - Companies such as Tianyue Advanced and Sanan Optoelectronics are actively pursuing innovations in SiC products for various applications, including power devices and thermal management [11][12]. - Financing data shows that several SiC-related stocks have received substantial investments, with Tongfu Microelectronics leading with an increase of 7.01 billion yuan in financing [14].