Apparatus for crystal growth

An apparatus for crystal growth in the liquid phase comprising:

• an electric furnace means for producing temperature differences vertically and for providing a plurality of isothermal curved planes vertically spaced from each other within said furnace;
• a reactor defining a chamber which is within and is heated by said electric furnace;
• a jig assembly means which is set in said reactor chamber and which includes an upper part and a lower part, the lower part being fixed and being arranged to hold on its upper surface a plurality of substrates, said lower part having means for positioning said substrates whereby a planar surface of each of said substrates on which the liquid phase crystal growth is to be made extends tangentially to an isothermal plane, said means for positioning said plurality of substrates including means for positioning the planar surface of at least one substrate aslant with respect to any position perpendicular or parallel to the vertical axis of said jig assembly means or to the center plane defined between the upper and lower parts of the jig assembly means, and the upper part having reservoir means for containing a solution for crystal growth;
• and
• control means to bring the solution for the growth in said reservoir means of said upper part into contact with said planar surface of each of said substrates and then to separate said solution and said planar surface.