I. Main Uses and Functions of Molybdenum
Molybdenum is a silvery-white metallic element with excellent physical and chemical properties, making it widely used in various fields. The following are the main uses and functions of molybdenum:
1. Steel Industry: Molybdenum dominates the steel industry, accounting for approximately 80% of total molybdenum consumption. It improves steel's strength, hardness, wear resistance, and corrosion resistance, resulting in better performance and a longer service life. For example, molybdenum-containing stainless steel is widely used in corrosive environments such as the chemical and marine industries.
2. Chemical Industry: Molybdenum compounds are widely used as catalysts in the chemical industry. For example, molybdenum disulfide can be used as a catalyst for hydrodesulfurization and hydrocarbon cracking, while molybdenum oxide is used in the manufacture of various pigments and dyes.
3. Electronics Industry: Molybdenum is primarily used as an electrode material in the electronics industry. Due to its high-temperature stability and good electrical conductivity, molybdenum electrodes are widely used in electronic devices such as electron tubes, transistors, and rectifiers. Molybdenum is also used in the manufacture of heating elements and heat shields in vacuum furnaces.
II. Key Application Steps of Molybdenum in Semiconductor Manufacturing
With the rapid advancement of semiconductor technology, the application of molybdenum in this field has become increasingly widespread. The following are three key application steps for molybdenum in semiconductor manufacturing:
1. Ion implantation: In this process, molybdenum is used as the ion source material. Ion implantation is a method of introducing dopant atoms into silicon wafers, which can change the wafer's conductivity. Due to its high melting point and excellent corrosion resistance, molybdenum can withstand the reaction of dopant gases and erosion by plasma within the chamber, thus ensuring the stability and efficiency of ion implantation.
2. Molecular beam epitaxy equipment: Molecular beam epitaxy is a high-precision, high-quality semiconductor material growth technology. In this process, molybdenum is used as the material for baffles, substrate holders, and other components within the vacuum chamber. Due to its high hardness and flatness, molybdenum ensures the accuracy and consistency of the semiconductor crystal structure.
3. Photolithography masks: During the photolithography process, a material is used as a mask to protect certain areas on the silicon wafer from the photoresist. Molybdenum foil is widely used as a photolithography mask material due to its high precision, high repeatability, and excellent corrosion resistance.
