Abstract: To provide a sputtering target structure which has good machinability and thermal conductivity and has good wettability with soldering materials, which is inexpensive and can be used repeatedly for a long period of time, and which is free from problems of cracking and peeling of the sputtering target therein, a sputtering target structure is formed by bonding a sputtering target and a backing plate. The backing plate is formed of a material that has the difference in the linear expansion coefficient between it and the sputtering target material of at most 2×10?6/K, and a copper plate having a thickness of from 0.3 to 1.5 mm is disposed on at lest one face of the backing plate.

Abstract: To provide a sputtering target structure which has good machinability and thermal conductivity and has good wettability with soldering materials, which is inexpensive and can be used repeatedly for a long period of time, and which is free from problems of cracking and peeling of the sputtering target therein, a sputtering target structure is formed by bonding a sputtering target and a backing plate. The backing plate is formed of a material that has the difference in the linear expansion coefficient between it and the sputtering target material of at most 2×10?6/K, and a copper plate having a thickness of from 0.3 to 1.5 mm is disposed on at lest one face of the backing plate.

Abstract: To provide a sputtering target structure which has good machinability and thermal conductivity and has good wettability with soldering materials, which is inexpensive and can be used repeatedly for a long period of time, and which is free from problems of cracking and peeling of the sputtering target therein, a sputtering target structure is formed by bonding a sputtering target and a backing plate. The backing plate is formed of a material that has the difference in the linear expansion coefficient between it and the sputtering target material of at most 2×10?6/K, and a copper plate having a thickness of from 0.3 to 1.5 mm is disposed on at lest one face of the backing plate.

Abstract: A chromium weld material comprising chromium as a main component and either one of or an appropriate combination of elements selected from the group IVb metals of the periodic table, Al, metals belonging to the groups VIIb, VIII, and Ib of the periodic table, Nb, and Ta and, if desired, at least one of rare earth elements, a chromium rolled article comprising chromium as a main component and either one of or an appropriate combination of elements selected from Al, Ti, Zr, Hf, Y, rare earth elements, and elements belonging to the groups Vb, VIb, and VIIb of the periodic table, and a process for producing said rolled article by cross-rolling under specific temperature and output rate conditions are disclosed. The weld material provides a weld free from deterioration of mechanical characteristics. The rolled article exhibits excellent tensile characteristics. The process provides a rolled sheet of small thickness without causing craking.

Abstract: The present invention relates to giant grains or single crystals of chromium. Hitherto, since single crystals of chromium were generally obtained by a floating zone method, it was difficult to obtain an optionally shaped chromium single crystal. The present invention has been made in order to overcome these problems and provides a process for producing single crystals of chromium by secondary recrystallization. That is, it has been found that control of the amount of impurities present in a chromium component such as, for example, Co, Ti, Al, Si, and Ca, has a good influence on the formation of single crystals of chromium. For example, if chromium to which the above-described Ti, Al, Si, and Ca have been added in an amount of from 0.0002 wt % to 0.1 wt %, calculated as oxides thereof, or to which from 0.01 to 3 wt % of Co has further been added, is sintered and the resulting chromium molding is heated treated, single crystals of chromium having a complicated shape can be obtained.

Abstract: A chromium weld material comprising chromium as a main component and either one of or an appropriate combination of elements selected from the group IVb metals of the periodic table, Al, metals belonging to the groups VIIb, VIII, and Ib of the periodic table, Nb, and Ta and, if desired, at least one of rare earth elements, a chromium rolled article comprising chromium as a main component and either one of or an appropriate combination of elements selected from Al, Ti, Zr, Hf, Y, rare earth elements, and elements belonging to the groups Vb, VIb, and VIIb of the periodic table, and a process for producing said rolled article by cross-rolling under specific temperature and output rate conditions are disclosed. The weld material provides a weld free from deterioration of mechanical characteristics. The rolled article exhibits excellent tensile characteristics. The process provides a rolled sheet of small thickness without causing craking.

Abstract: A method for producing a single crystal of chromium is disclosed, comprising sintering a chromium molding to thereby apply thereto a thermal strain and heat treating the resulting thermally strained chromium molding. The method achieves high efficiency of crystal growth and produces a single-crystal chromium molding of complicated shape.