Abstract: An aluminum porcelain composition, is described, of the ternary Al.sub.2 O.sub.3 --CaO--TiO.sub.2 system, having a compositional range defined by points A, B, C, and D in the composition diagram set forth in the drawing, wherein the points A, B, C, and D represent the following molar fractions of Al.sub.2 O.sub.3, CaO, and TiO.sub.2 :______________________________________ Al.sub.2 O.sub.3 CaO TiO.sub.2 ______________________________________ point A 0.94 0.04 0.02 point B 0.81 0.14 0.05 point C 0.81 0.02 0.17 point D 0.94 0.01 0.05.

Abstract: A dielectric ceramic composition, which has a high dielectric constant, low loss and stable temperature characteristics suited for the microwave frequency range, is obtained by the present invention. The dielectric ceramic composition according to the present invention is expressed as (Ba.sub.x Sr.sub.1-x)(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 and with a mole fraction range of 0.ltoreq.x<1.

Abstract: A memory cell of a dynamic storage device is composed of a MOSFET and a capacitor. On a single semiconductor substrate, a plurality of such memory cells are regularly arranged so as to form a plurality of columns, with the result that they constitute a memory cell array or a memory cell mat. The capacitor for the memory cell is made up of a semiconductor region of the type which possesses a conductivity opposite to that of the semiconductor substrate, and a conductor film which is formed of polycrystalline silicon or the like on the semiconductor region through a comparatively thin insulating film. The areas of the capacitors in the memory cell column situated at an end portion of the memory cell mat are made larger than those of the capacitors of the memory cells at an inner or central portion of the memory cell mat. The memory cells at the end portion of the memory cell mat come to have information holding times equivalent to those of the memory cells at the central portion of the memory cell mat.

Abstract: A field-effect liquid-crystal type display device employing a twisted alignment method is provided with a pair of electrode glass plates spaced apart from each other and a field-effect type liquid crystal with a positive dielectric anisotropy loaded in the space defined by the plates, the plates being disposed in such a manner that an angle formed by the alignment treatment directions of the plates is changed a proper angle from 90.degree., so that the twisting direction of molecules in the liquid crystal is unified and the liquid crystal type display device is improved to show homogeneity, and thus to reduce the number of dirty domains or spots in display.