the application of materials in the field of semiconductor and photovoltaic industry
relevant industry experts believe that, Graphite products, in the field of semiconductor and photovoltaic industry that use carbon graphite materials, can be used is classified into three categories, or three stages of development. First type for the moulding or extrusion, or vibration molding process method of graphite products. This type of graphite products in the field of semiconductor and photovoltaic industry application of carbon graphite materials products group, now occupies a small part of it. The second type of isostatic pressing molding process method of isotropic high purity graphite products. In the present semiconductor, pv industry it is the most widely used. It accounts for the entire world system in the field of semiconductor, photovoltaic industry more than about 80% of the amount of graphite products. The third type of carbon – carbon . This is a kind of application in the field of semiconductor and photovoltaic industry to replace graphite materials, a new type of materials and products.
The carbon – materials can be thought of in the field of semiconductor and photovoltaic industry as a heater, thermal insulation materials on the application of the third stage, is also a higher technology development phase. But does not speak now use the isotropic high purity graphite products in the future be eliminated, and all were replaced by a carbon – carbon composite materials. The relevant industry experts believe that the future application in the field of semiconductor and photovoltaic industry who is not a substitute for the two kinds of materials and products. Prediction in a, 20 years later, will develop into “half” of each market pattern.
Carbon – carbon composite material is carbon fiber reinforced carbon matrix composites. It has the advantage of light quality, good erosion resistance, good thermal shock, high damage tolerance, high temperature and high strength, strong sex can design outstanding characteristic, therefore, it is in many fields such as aerospace, aviation, atomic energy has a wide application. And the composite materials can choose fiber type, structure, quantity and matrix precursor and process conditions for the preparation of a specific use the required performance and shape, so its application scope is more and more widely, also more and more get people’s attention. Carbon – carbon composite material strength is greater than that of graphite, it has very good dimensional stability, impact resistance, good thermal shock resistance, its comprehensive mechanical performance is better than that of graphite. The material can pass purification processing, metal impurity content can be controlled in 5 parts per million.
Used as a semiconductor, photovoltaic products, industrial carbon – carbon composite material thermal field compared with the traditional graphite products, has the following advantages: (1) can greatly prolong the service life of product, reduce the number of replacement parts, so as to improve the utilization rate of equipment, reduce maintenance cost; (2) compared with the traditional graphite products, can do much more thin, thus can make use of existing equipment production size is longer, the bigger the diameter of the product, can save a lot of new equipment investment cost, also make it more uniform temperature field; (3) because of its good thermal shock resistance, in under the condition of high temperature reting repeatedly is not easy to crack, so as to avoid the change of the temperature field; (4) in the control of large diameter of the products, the traditional hot field of graphite products molding difficult, due to carbon – carbon composite material has excellent performance, the control of large diameter products abroad, mainly adopted the carbon – carbon composite material thermal field; (5) in czochralski single crystal furnace using carbon – carbon composite material as heat insulation (thermal screen), because of its heat preservation effect is good, comparable with graphite materials to save energy consumption of a certain (some research results can save 20% energy) is put forward.
According to the China electronic materials industry association survey, although the world and our country in the carbon – carbon composite material substitution in the semiconductor, pv industrial graphite products on a lot of progress, but it still exist the following problems: (1) the manufacturing cost is very high (usually in graphite products, or even higher). (2) carbon – carbon composite materials in the manufacturing production cycle is long, realize the mass production speed is low. (3) in domestic carbon – carbon composite materials the product manufacture, domestic carbon fiber material is still basically can’t production, need to rely on foreign imports. (4) due to the manufacture of semiconductor, pv industrial carbon – carbon composite materials research and development, the production history is very short, in the process of maturity is not enough, so some of the items on the performance remains to be improved.
This research report, not including semiconductor, pv industrial carbon – carbon composite material parts, and because of the development of it, for the future of semiconductor, pv industrial graphite products in the future market movements have certain influence, therefore in the report within this section, to join the aspects in this paper.
Hi-tech Material Co., Ltd is a carbon group company which is the worldwide leading manufacturer of graphite material, graphite felt and carbon carbon composite.