Back plane

Claim 1

A multiple voltage power bus comprising: a laminate structure composed of at least two layers of electrically conductive material and at least an intervening layer of insulating material, the layers defining a first array of channels extending through the laminate structure normal to the layers, the first array of channels being formed by apertures in the layers, each channel of said first array having at least one aperture in one of the electrically conductive layers which is of reduced cross-sectional area when compared to the aperture in the layer of insulating material defining that channel, and each electrically conductive layer having at least one of the apertures of reduced cross-sectional area, the layers further defining a second array of channels extending through the laminate structure and interspersed at regular intervals with respect to the channels defining the first array, the channels of said second array each being of uniform cross-sectional area; electrically conductive terminal pins mounted in each channel of said first array in close-contact with the apertures in the layers of conductive material having reduced cross-sectional area whereby electrical contact is established between said layers having apertures of reduced area and the terminal pins; insulating means interposed in said channels of said first array between the terminal pins and the electrically conductive layers which are not in contact therewith; electrical circuit component means mounted in the channels of said second array, said component means having conductors extending outwardly therefrom with respect to said laminate structure; and means displaced from the surface of said laminate structure for electrically connecting said conductors to selected of said terminal pins.