Core Viewpoint - The article discusses the shift in the semiconductor industry towards advanced materials for thermal management, particularly the adoption of 12-inch silicon carbide (SiC) substrates by TSMC, moving away from gallium nitride (GaN) [2][5]. Group 1: Thermal Management Challenges - The increasing density and power consumption of chips due to AI accelerators and high-performance computing (HPC) applications are creating significant thermal management challenges [2][3]. - Traditional ceramic substrates are becoming inadequate for the thermal flux demands of modern chip designs, necessitating a shift to more efficient materials [2][3]. Group 2: Advantages of Silicon Carbide (SiC) - SiC is recognized for its high thermal conductivity, reaching approximately 500 W/mK, which is significantly higher than common ceramic substrates like alumina or sapphire [2]. - The material's unique properties, including high mechanical strength and thermal shock resistance, make it suitable for both 2.5D and 3D packaging architectures [4][5]. - TSMC's transition to SiC is seen as a strategic move to enhance thermal management capabilities, aligning with the industry's need for efficient heat dissipation solutions [5][6]. Group 3: TSMC's Strategic Shift - TSMC plans to phase out its GaN business by 2027, reallocating resources to SiC, which is viewed as more aligned with long-term market needs for thermal management [5]. - The company aims to leverage its existing 12-inch wafer manufacturing experience to facilitate the integration of SiC, minimizing the need for new manufacturing systems [3][5]. - TSMC's focus on ensuring crystal integrity and surface flatness in SiC substrates is critical for achieving high yield rates in production [3][5]. Group 4: Competitive Landscape - Other leading companies, such as Intel, are also prioritizing thermal management as a core competitive advantage, indicating a broader industry trend [6]. - While alternatives like diamond and graphene offer high thermal conductivity, their cost and scalability issues limit their mainstream adoption, positioning SiC as a practical compromise [6].