Abstract: A semiconductor device is described in which a conductive layer overlaps a dielectric layer forming a composite electrical device deposited over selected portions of a semiconductor substrate chemically isolating the conductive layer portion of the composite electrical device from the substrate, thereby preventing diffusion of dopant material through the dielectric layer into and out of the conductive layer while simultaneously allowing for tunneling of electrons through the dielectric layer to and from the conductive layer and the semiconductor substrate.

Abstract: A cross-shaped gameboard has four arms extending radially from a central area and equiangularly spaced by 90.degree. from each other. The arms are of equal dimensions. A pocket is provided in each of the arms in the area of the end thereof farthest from the central area. Each of the pockets is adapted to accommodate a marble. A plurality of channels are formed in each of the arms and extend radially from the pocket in each of the arms. Rails extend along the edges of the arms to retain marbles on the arms. A plurality of marbles are provided. At the center of the gameboard, the marble are arranged in a square pattern such that when an additional marble is held at a height above the gameboard and dropped to a central area among the marbles, the marbles will be struck by the dropped marble and displaced thereby. The object of the game is to attempt to displace the marbles from the center of the gameboard and cause each to roll along an arm and fall into a pocket at the end of an arm.