玻璃基板，量产前夜

Core Viewpoint - The semiconductor industry is shifting from process competition to packaging innovation, with glass substrates emerging as a key material to overcome performance bottlenecks in advanced packaging [1][2]. Group 1: Industry Dynamics - Major companies like Samsung, Intel, AMD, and Nvidia are actively exploring glass substrates for next-generation chip development, indicating a strategic focus on this material [1]. - Recent developments include Japan's Rapidus exploring glass substrate technology and Samsung's plans to establish a joint venture with Sumitomo Chemical for glass substrate production [1][2]. Group 2: Advantages of Glass Substrates - Glass substrates offer significant advantages over traditional organic substrates and silicon interposers, including lower dielectric loss, excellent thermal stability, and high flatness [3][4]. - The electrical performance of glass substrates is superior, with signal transmission loss at 10GHz being only 0.3dB/mm, and dielectric loss reduced by over 50% compared to organic substrates [4]. - Glass substrates can achieve a thermal expansion coefficient (CTE) of 3-5ppm/°C, matching silicon chips and reducing warpage by 70% during thermal cycling [4]. Group 3: Types of Glass Substrates - Glass substrates are categorized into glass interposers and glass core substrates, each serving different roles in advanced packaging scenarios [3][6]. - Glass interposers are primarily used in 2.5D packaging, enabling high-density interconnections between multiple chips [6]. - Glass core substrates are aimed at 3D packaging and chiplet integration, providing a stable solution for increasing chip sizes and I/O counts [8]. Group 4: Industry Competition - The competition in the glass substrate market is intensifying, with companies like Intel, Samsung, TSMC, and new entrants like Rapidus and Absolics making significant investments and strategic moves [12][14][20]. - Intel has invested over $1 billion in developing glass substrate technology and aims for large-scale application by 2026-2030 [12][13]. - Samsung is pursuing a dual-line strategy, focusing on both rapid commercialization and long-term technological breakthroughs in glass substrates [14][15]. Group 5: Challenges and Barriers - The glass substrate industry faces challenges in scaling production, with many companies still in the early stages of development and validation [34][39]. - Key technical challenges include the efficiency and yield of TGV (Through Glass Via) processes, high-density wiring, and bonding reliability [35][41]. - Cost remains a significant barrier, with the production costs of glass substrates being substantially higher than traditional organic substrates, limiting their application in price-sensitive markets [39][40]. Group 6: Domestic Developments - Domestic companies in China are actively pursuing opportunities in the glass substrate market, leveraging their expertise in glass processing and precision manufacturing [23][30]. - Companies like BOE and Wog Glass are making strides in developing glass substrates for semiconductor packaging, with plans for mass production and technological advancements [24][25]. - The establishment of industry alliances and collaborations between academia and industry is fostering innovation and addressing common technical challenges in the glass substrate sector [30][31].