The Development of the Human Eye

A diffused resistor structure and method for fabrication which produces the resistor electrical contacts below the surface of the semiconductor device. The resistor structure includes a resistor region of a first conductivity type surrounded at the surface of the region by a region of a second conductivity. At least two spaced semiconductor electrical contacts of a first conductivity are made to the resistor region. The contacts are below the surface of the resistor structure. Electrical contacts are provided on the surface of the structure spaced from the resistor region and electrically connected to the two spaced semiconductor contacts below the surface of the resistor structure.