Semiconductor precision equipment: The core support for industrial advancement

Semiconductor precision equipment: The core support for industrial advancement 

In the global semiconductor industry's accelerating evolution towards high-end and intelligent manufacturing, technological breakthroughs in precision equipment have become a key force driving the industry's autonomy and controllability. Every step in wafer manufacturing, from transfer and alignment to processing, relies on nanometer-level precision motion control technology. Since its establishment in 2023, Huzhou Prim Semiconductor Co., Ltd., as an innovative leader in the domestic semiconductor equipment field, has focused on nanometer-level ultra-precision motion control technology, building a core equipment matrix centered around precision motion stages, air-bearing rotation axes, wafer alignment stages, and wafer transfer systems, injecting strong momentum into the rise of domestic semiconductor equipment. 

Precision motion stage: The "skeletal system" with nanometer accuracy 

If the wafer processing flow is the "neural network" of semiconductor manufacturing, then the precision motion stage is the "skeletal system" that supports the entire system. Huzhou Prim's nanometer-level ultra-high precision motion platform, equipped with self-developed air-floatation hydrostatic technology and nanometer interferometry feedback compensation system, has achieved a positioning accuracy of 50 nanometers and a repeat positioning accuracy of 35 nanometers. The new generation of products has further improved the positioning accuracy to within 30 nanometers, reaching the international advanced level. 

The design of a precision motion stage requires consideration of multiple technical elements. In terms of structural design, its frame must have sufficient strength and rigidity to prevent vibrations during processing from affecting accuracy. The drive system employs high-precision servo motors, capable of precisely controlling each minute movement of the platform. The position feedback system uses high-precision sensors to monitor the platform's position in real time, ensuring the accuracy of the motion trajectory. The accompanying control software coordinates the operation of each component, achieving a unified smoothness and precision in motion. 

In semiconductor manufacturing, precision motion stages are widely used in core processes such as photolithography machines, etching machines, and testing equipment. They can precisely control the movement and positioning of wafers, ensuring that every minute position on the wafer meets the design requirements during processes like photolithography and etching. This reduces material waste and improves the production yield of chips. As chip manufacturing processes advance towards 3nm, 2nm, and even more advanced technologies, the precision requirements for motion stages are becoming increasingly stringent. The technological breakthroughs of Huzhou Primetech provide crucial support for domestic high-end chip manufacturing. 

Air flotation rotating shaft: The "joint hinge" of precise motion 

In the microscopic world of semiconductor manufacturing, the control of nanometer-level precision is the key to determining the performance and yield of chips. The air-floatation rotating shaft is one of the core components that achieve this high-precision operation, and it can be regarded as the "joint hub" of precise motion. 

The core technology of the air flotation rotating shaft lies in the dynamic pressure air bearing, which realizes a fundamental change in the bearing method from "sliding" to "floating". Different from the traditional sliding friction mode where solid surfaces directly contact each other, the dynamic pressure air bearing uses air as the working medium. Through ingenious structural design, when the moving parts rotate at high speed, a very thin air film is automatically "wedged" into the bearing gap, thus lifting the rotor and achieving non-contact support. This design not only completely eliminates the friction between solids and the heat generated thereby, but also enables the moving platform to make extremely small displacements, ensuring the smoothness and accuracy of the movement. 

The air-bearing rotating shaft has extensive applications in semiconductor manufacturing, such as in critical processes like wafer dicing, inspection, alignment, grinding/thinning, etc., all of which rely on its support. During the wafer alignment process, the air-bearing rotating shaft can precisely control the rotation angle of the wafer, ensuring that the alignment marks on the wafer accurately align with those of the subsequent processing equipment. In the wafer grinding stage, it can stably drive the wafer to rotate, guaranteeing uniform grinding and thereby enhancing the wafer's flatness and processing quality. Huzhou Primex's in-depth research and development in air-bearing rotating shaft technology provide a reliable guarantee for high-precision operations in semiconductor manufacturing. 

Wafer alignment stage: The "Precision Guardian" of Chip Yield 

The wafer alignment stage is a crucial piece of equipment in semiconductor manufacturing. Its primary function is to accurately align wafers for subsequent lithography or etching processes. The alignment accuracy directly affects the yield and performance of chips, making it a "precise guardian" of chip yield. 

Modern wafer alignment stages are typically equipped with high-precision optical systems and advanced motion control technologies, enabling sub-micron or even nanometer-level alignment accuracy. During the alignment process, image processing techniques are usually employed to detect feature points on the wafer, and through real-time feedback control systems, the position of the motion platform is fine-tuned to ensure precise wafer alignment. The advancement of this technology has significantly enhanced the efficiency and reliability of wafer production. 

The wafer aligner of Huzhou Prim has been designed with the strict requirements of semiconductor manufacturing in mind. It features excellent anti-vibration performance, maintaining stability during high-speed movement and positioning without being affected by external interference factors. Additionally, it is highly automated, enabling rapid wafer alignment and reducing waiting time between processes, thereby enhancing the overall efficiency of the production line. Before the lithography process, the wafer aligner adjusts the wafer to the specified angle and feeds it into the exposure equipment, ensuring precise alignment of the mask pattern and the wafer crystal orientation. During the etching process, it guarantees accurate control of the anisotropic etching direction, laying the foundation for the performance of the chip. 

Wafer transfer system: The "efficient vein" of the production process 

The wafer transfer system is a device used to automate the transfer of wafers during the semiconductor manufacturing process. It acts as the "efficient artery" of the production flow, connecting various processing stages and ensuring the rapid and precise transfer of wafers between different equipment. 

The working principle of the wafer transfer system mainly relies on mechanical arms and flexible automatic control algorithms. When the system receives a transfer command, the mechanical arm uses vacuum adsorption technology to grasp the wafer, precisely positions it with high-precision sensors, and then moves the wafer to the designated position along the preset path. To ensure accuracy, the system is also equipped with real-time position monitoring and correction mechanisms to guarantee the stability and safety of the wafer during the transfer process. 

The wafer transfer systems of Huzhou Prim are widely used in multiple process steps such as lithography, etching, and ion implantation in the semiconductor industry. They not only enhance production efficiency, reduce manual intervention and human errors, but also effectively lower the risk of wafer damage caused by human operation, thereby improving the safety and reliability of the production process. With the continuous advancement of chip manufacturing technology, the design of wafer transfer systems has become increasingly complex. The products of Huzhou Prim can meet higher precision requirements and faster transfer speeds, and adapt to the transfer needs of wafers of different sizes and materials, providing a strong guarantee for the efficient operation of semiconductor production lines. 

The Rise of Domestic Precision Equipment 

The technological innovation of Huzhou Prim Semiconductor Co., Ltd. is a microcosm of the rise of domestic semiconductor precision equipment. Against the backdrop of the accelerated reconfiguration of the global semiconductor industry landscape, Chinese semiconductor equipment enterprises are breaking foreign technological monopolies through independent innovation and promoting the realization of industrial autonomy and controllability. 

From the breakthrough in nanometer-level precision of the precision motion stage to the non-contact support technology of the air-bearing rotating shaft, and then to the precise alignment of the wafer alignment stage and the efficient transfer of the wafer handling system, Huzhou Prim has built a complete precision solution for the entire wafer processing process. The collaborative operation of these core devices has formed a complete precision motion control ecosystem, providing solid technical support for the development of domestic semiconductor equipment. 

In the future, with the deep integration of artificial intelligence, the Internet of Things and other technologies with semiconductor manufacturing, semiconductor precision equipment will develop in a more intelligent and automated direction. Domestic enterprises such as Huzhou Prim will continue to increase R&D investment, constantly break through technological bottlenecks, improve the performance and reliability of products, inject continuous impetus into the high-quality development of China's semiconductor industry, and promote the occupation of a more important position by domestic semiconductor equipment in the global market.