Patent ID: 7633373
Filing Date: 2009-12-15
Classification: H01C

Abstract:
1. A method of forming a thin film resistor on a semiconductor wafer, the method comprising: forming a first isolation layer over the semiconductor wafer; forming spaced-apart first and second conductive landing pads that touch the first isolation layer, the first isolation layer having a top surface, the first and second conductive landing pads having top surfaces; forming a resistive region having a bottom surface that touches the top surface of the first isolation layer and the top surfaces of the first and second conductive landing pads, the top surface of the first conductive landing pad, the top surface of the second conductive landing pad, and substantially all of the bottom surface of the resistive region lying in a single plane; forming a second isolation layer that touches the resistive region and the spaced-apart first and second conductive landing pads, the second isolation layer having a top surface; and making electrical connections with the spaced-apart first and second conductive landing pads through the second isolation layer.