Patent ID: 8704235

Claim:
A semiconductor circuit having a capacitor and a thin film transistor (TFT), comprising: a substrate; a semiconductor layer and a first capacitor electrode formed on the substrate, the first capacitor electrode being doped to be conductive; an insulating layer covering the semiconductor layer and the first capacitor electrode; a gate electrode disposed on the insulating layer and corresponding to a portion of the semiconductor layer, wherein the thickness of the gate electrode is greater than 1000 Å and less than 5000 Å; a second capacitor electrode disposed on the insulating layer and corresponding to the first capacitor electrode, wherein the gate electrode comprises a first conductive layer corresponding to the portion of the semiconductor layer and a second conductive layer disposed on the first conductive layer, wherein the second conductive layer is substantially thicker than the first conductive layer and the second capacitor electrode, wherein the first conductive layer and the second capacitor electrode are formed of the same material and wherein the first and second conductive layers are configured to block dopants during an ion doping process and the second capacitor electrode is configured to pass through the dopants during the ion doping process; and an intermediate insulating layer formed directly on the insulating layer, the second conductive layer and the second capacitor electrode, wherein the intermediate insulating layer includes: a first portion formed directly over the second conductive layer, a second portion formed directly over the second capacitor electrode, and a third portion formed directly over the insulating layer, wherein a second distance between a top surface of the second portion and a top surface of the substrate is greater than a third distance between a top surface of the third portion and the top surface of the substrate, and wherein the second distance is less than a first distance between a top surface of the first portion and the top surface of the substrate.