Patent ID: 8823002
Filing Date: 2014-09-02
Classification: H01L

Abstract:
1. A semiconductor device that has first and second TFTs, the device comprising: first and second gate electrodes that are provided for the first and second TFTs, respectively; an insulating layer that has been formed to cover the first and second gate electrodes; first and second semiconductor layers that have been formed on the insulating layer for the first and second TFTs, respectively; a first source contact layer and a first drain contact layer that have been formed on the first semiconductor layer; a second source contact layer and a second drain contact layer that have been formed on the second semiconductor layer; a first source electrode and a first drain electrode that have been formed on the first source contact layer and the first drain contact layer, respectively; and a second source electrode and a second drain electrode that have been formed on the second source contact layer and the second drain contact layer, respectively, wherein the first semiconductor layer includes a first channel layer made of microcrystalline silicon and the second semiconductor layer includes a second channel layer made of microcrystalline silicon, and wherein the crystal grains included in the first channel layer have an average grain size of less than 1 nm and the crystal grains included in the second channel layer have an average grain size of 1 nm to 10 nm.