HTCC (High Temperature Co - fired Ceramic) involves mixing ceramic powder with additives such as solvents, binders, dispersants, and plasticizers to form a slurry. Green ceramic tapes are obtained through tape casting technology. After cutting them into films of a fixed size, laser drilling is performed. Screen printing technology is used to fill the holes and design circuits on each layer with metals like tungsten, molybdenum, and molybdenum - manganese. Then, the green bodies are laminated, pressed, cut, and sintered. Finally, vertical interconnection between different layers is achieved, and the combination of metal and ceramic is completed.
The HTCC flattening machine is a key equipment specially designed for processing HTCC green ceramic sheets and related products, and it plays an important role in the HTCC process. Its main function is to accurately flatten HTCC green ceramic sheets, ensuring the flatness and stability of the green ceramic sheets in subsequent processing, thereby effectively improving the quality and performance of the final products.
1. Equipment Functions and Principles
(1) Function Overview
Green Ceramic Sheet Flattening: It can flatten the filled raised slurry or printed patterns on the cast HTCC green ceramic sheets under specific temperature and pressure conditions. By precisely controlling the pressure and temperature, the unevenness on the surface of the green ceramic sheets is eliminated, providing a good foundation for subsequent processes such as lamination and sintering.
Uniform Pressure Application: It can realize uniform pressurization of the product materials. In the production process of HTCC products, uniform pressure is crucial. It can ensure that all parts of the green ceramic sheets are stressed uniformly, avoiding defects such as deformation and delamination caused by uneven pressure, greatly improving the stability and consistency of the products, and reducing the defect rate.
(2) Working Principle
Based on the theory of elasticity and plasticity, the pressure head of the equipment is used to apply pressure to the HTCC green ceramic sheets. When the pressure head acts on the green ceramic sheets, the green ceramic sheets undergo elastic deformation under pressure. With the continuous increase of pressure, the green ceramic sheets gradually enter the plastic deformation stage, thereby realizing the correction and flattening of surface unevenness. At the same time, the equipment is equipped with precise pressure and temperature control systems to ensure the stability of pressure and temperature during the flattening process, meeting the flattening process requirements of different HTCC green ceramic sheets.
2. Equipment Features and Advantages
(1) High - precision Pressure Control
Precise Pressure Regulation: It adopts an advanced hydraulic system and high - precision pressure sensors, which can realize stepless regulation of the flattening pressure with a regulation accuracy of ±0.1MPa. Whether it is for thin green ceramic sheets or special materials that require high pressure for flattening, the pressure can be accurately set and controlled to ensure the consistency and stability of the flattening effect.
High Pressure Uniformity: Through the optimally designed pressure head structure and pressure distribution system, it ensures that the pressure is evenly distributed in the entire flattening area, with a pressure deviation of l ess than ±1%. This feature effectively avoids problems such as deformation and cracks of the green ceramic sheets caused by excessive or insufficient local pressure, significantly improving the product quality and yield.
(2) Precise Temperature Control
Wide Temperature Control Range: The HTCC flattening machine is equipped with a complete heating and temperature control system, with a temperature control range from room temperature to 200℃, which can meet the temperature requirements of different HTCC green ceramic sheet materials during the flattening process. Whether it is for temperature - sensitive special green ceramic sheet materials or temperature conditions required by conventional processes, precise regulation and control can be achieved.
High Temperature Control Precision: It adopts the PID intelligent temperature control algorithm, combined with high - precision temperature sensors, with a temperature control accuracy of ±1℃. A stable temperature environment is conducive to the uniform flow and plastic deformation of the materials inside the green ceramic sheets, ensuring the flattening effect while reducing the impact of temperature fluctuations on the performance of the green ceramic sheets.
(3) Efficient and Stable Operation Performance
High - reliability Structural Design: The main frame is made of high - strength steel, which has excellent rigidity and stability after precision processing and strict quality inspection. During long - term continuous operation, the equipment can withstand huge pressure and frequent operations, and is not prone to deformation, loosening and other problems, ensuring high reliability and long service life of the equipment.
Advanced Transmission and Control System: It is equipped with an advanced motor drive system and PLC control system, realizing the automation and intelligence of equipment operation. Operators only need to set relevant parameters on the human - machine interface, and the equipment can automatically complete the flattening operation according to the preset program, with simple operation and stable operation. At the same time, the equipment is equipped with a complete fault diagnosis and alarm function, which can timely detect and solve problems during operation, improving production efficiency and the convenience of equipment maintenance.
(4) Good Operation Convenience
User - friendly Human - Machine Interface: A large - size color touch screen is used as the human - machine interaction interface. The interface design is simple and intuitive, and the operation is convenient and easy to understand. Operators can easily complete operations such as parameter setting, equipment start and stop, and operation status monitoring through the touch screen, greatly reducing the labor intensity and operation difficulty of operators.
Quick Mold Change System: In order to meet the flattening needs of HTCC green ceramic sheets of different specifications, the equipment is equipped with a quick mold change system. Through simple operations, the mold can be replaced in a short time, improving the versatility and production flexibility of the equipment, and adapting to diversified production tasks.
3. Application Fields
The HTCC flattening machine is widely used in various links of the HTCC multi-layer ceramic device industry, including but not limited to the production of the following products:
HTCC Chip Oxygen Sensor: In the production process of chip oxygen sensors, the precise flattening of green ceramic sheets by the HTCC flattening machine helps to ensure the consistency and stability of the internal structure of the sensor, thereby improving the measurement accuracy and reliability of the sensor.
HTCC Ceramic Package: For the manufacture of HTCC ceramic packages, the flattening machine can ensure the flatness of the green ceramic sheets before lamination and sintering, so that the package has better sealing and electrical performance when encapsulating electronic components.
HTCC Pressure Sensor: In the production of pressure sensors, the flatness of the green ceramic sheets directly affects the pressure sensing accuracy of the sensor. The HTCC flattening machine provides a good flattening effect for the green ceramic sheets through uniform pressure and precise temperature control, thereby improving the overall performance of the pressure sensor.
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