Abstract: An insulator is formed on a substrate, on which numerous first conductivity-type crystalline semiconductor particles are deposited on and brought into contact with the substrate. A second conductivity-type semiconductor layer for forming a PN-junction between the layer and the crystalline semiconductor particles is formed over the crystalline semiconductor particles and the insulator. The second conductivity-type semiconductor layer comprises a semiconductor layer including a crystalline semiconductor and an amorphous semiconductor in a mixed manner.

Abstract: A tablet selecting apparatus comprising a horizontally rotatable circular perforated plate having a multiplicity of perforations for passing reject tablets therethrough, a vibrator for giving vibrations to the perforated plate, a tablet feeding chute having a feeding outlet disposed above and opposed to the perforated plate at a position other than the center of the plate, an acceptable tablet blocking member provided adjacent the feeding outlet on one side thereof opposite to the direction of rotation of the perforated plate and spaced from the perforated plate by a clearance not permitting passage of the tablets therethrough, a compressed air injecting duct provided adjacent the blocking member on one side thereof opposite to the direction of rotation of the perforated plate and having an air outlet directed toward the outer periphery of the perforated plate, and a reject tablet receptacle disposed below the perforated plate.