Semiconductor Core
Overview
A semiconductor is a material with electrical conductivity between that of a conductor and an insulator, serving as the core component that acts as the brain of modern electronic devices. Semiconductor core refers to the technological elements and industrial ecosystem spanning design, manufacturing processes, materials, equipment, and packaging, forming the foundation for next-generation technologies such as artificial intelligence, autonomous driving, 5G/6G communications, and the Internet of Things.
Main Content
1. Basic Principles and Types of Semiconductors
Semiconductors are made from various materials such as silicon (Si), gallium arsenide (GaAs), and silicon carbide (SiC). Through a doping process that introduces impurities into pure semiconductors, they are divided into P-type (excess holes) and N-type (excess electrons) semiconductors, and their junctions form diodes, transistors, and other devices. Major semiconductor devices include memory semiconductors (DRAM, NAND Flash), system semiconductors (CPU, GPU, AP, MCU), analog semiconductors, and optical semiconductors.
2. Core Semiconductor Manufacturing Processes
Semiconductor manufacturing involves hundreds of ultra-precision steps. The core processes are as follows:
- Wafer Fabrication: High-purity silicon ingots are thinly sliced to create wafers.
- Oxidation and Deposition: Silicon oxide films (SiO₂) are formed, and insulating and conductive layers are deposited using chemical vapor deposition (CVD).
- Photolithography: Photoresist (PR) is applied, and ultraviolet light is irradiated through a mask to transfer circuit patterns. EUV (extreme ultraviolet) lithography is key for sub-7nm ultra-fine processes.
- Etching: Patterned areas are removed chemically and physically. Dry etching is advantageous for high precision.
- Ion Implantation: Doping materials are accelerated and implanted into the wafer to adjust electrical properties.
- Metal Wiring: Copper or aluminum is used to form interconnects between devices.
- Inspection and Packaging: After electrical testing, chips are diced and mounted in packages. Recently, 2.5D/3D packaging and TSV (through-silicon via) technology have become essential for high-performance chips.
3. Semiconductor Design and IP
Semiconductor design uses EDA (Electronic Design Automation) tools for circuit design, layout, and verification. A division of labor has become common, where fabless companies handle only design, and foundries handle manufacturing. Core design assets, known as IP (intellectual property), are traded through architecture licenses such as ARM and RISC-V.
4. Semiconductor Materials and Equipment
- Materials: Silicon wafers, photoresist, etching gases, CMP slurries, target materials, lead frames, etc. High-purity, high-performance materials determine yield and performance.
- Equipment: Lithography equipment (ASML's EUV), etching equipment (Lam Research, Tokyo Electron), deposition equipment (Applied Materials), inspection equipment (KLA), etc. Equipment localization is key to national competitiveness.
5. Global Semiconductor Market and Supply Chain
As of 2024, the global semiconductor market size is approximately $600 billion, split between memory and system semiconductors. Key companies include Samsung Electronics, TSMC, Intel, SK Hynix, Qualcomm, AMD, and NVIDIA. Major competitive regions include the US, China, Taiwan, South Korea, Japan, and Europe. Geopolitical issues such as the Chips Act and semiconductor alliances (Chip 4) are critical for stabilizing the semiconductor supply chain.
6. Semiconductor Technology Roadmap
- Process Miniaturization: Mass production of 3nm GAA (Gate-All-Around) transistors, with 2nm and 1.4nm under development. Introduction of EUV multi-patterning and high-NA EUV.
- Packaging: 2.5D/3D stacking, hybrid bonding, and chiplet architectures maximize performance and power efficiency.
- Material Innovation: SiC and GaN power semiconductors are expanding into electric vehicles and energy infrastructure. Research into next-generation memories such as ferroelectric and phase-change memory.
- AI Semiconductors: Competition in developing dedicated AI accelerator chips, including NVIDIA GPUs, Google TPUs, AMD MI series, and domestic companies like Rebellions and Sapeon.
Latest Trends
Key semiconductor trends for 2024–2025 are as follows:
- Explosive AI Semiconductor Demand: Generative AI (e.g., ChatGPT) has driven surging demand for HBM (high-bandwidth memory) and AI accelerators. Competition between SK Hynix and Samsung Electronics in HBM3E mass production, and NVIDIA's launch of the next-generation GPU 'Blackwell'.
- Intensifying US-China Semiconductor Hegemony: Strengthened US export controls on China (ban on semiconductor equipment and EUV), China's push to foster its domestic industry (Huawei and SMIC attempting 7nm mass production). Strategic cooperation among South Korea, Taiwan, and Japan.
- Chiplets and Heterogeneous Integration: Chiplet technology, integrating multiple functional chips into a single package, is becoming standardized. Led by the UCIe (Universal Chiplet Interconnect Express) Alliance.
- Expanding Power Semiconductor Market: Driven by electric vehicles and ESS demand, the SiC and GaN material market is growing over 20% annually. Companies like Infineon, STMicroelectronics, and ON Semiconductor are taking the lead.
- Domestic Semiconductor Cluster Development: Large-scale investments in Samsung Electronics' Pyeongtaek and Yongin clusters, and SK Hynix's Yongin cluster. Government support for the K-Semiconductor Belt.
- Sustainability and Environmental Regulations: Reduction of carbon emissions in semiconductor processes, regulation of chemical use, and development of recycling technologies.
Related Topics
- [[Semiconductor Process]]
- [[EUV Lithography]]
- [[HBM Memory]]
- [[AI Semiconductor]]
- [[Foundry Industry]]
- [[Power Semiconductor]]
- [[Chiplet Architecture]]
- [[Localization of Semiconductor Equipment]]
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