Patent ID: 7682884
Filing Date: 2010-03-23
Classification: H01L

Abstract:
1. A method for fabricating a pixel structure, comprising: providing a substrate; forming a first conductive layer on the substrate; providing a first shadow mask above the first conductive layer, wherein the first shadow mask exposes a portion of the first conductive layer; irradiating the first conductive layer through the first shadow mask with a laser beam, wherein the laser beam directly irradiates into the portion of the first conductive layer exposed by the first shadow mask so as to directly remove the portion of the first conductive layer to form a gate electrode; forming a gate insulating layer on the substrate to cover the gate electrode; forming a semiconductor layer on the gate insulating layer; providing a second shadow mask above the semiconductor layer, wherein the second shadow mask exposes a portion of the semiconductor layer; irradiating the semiconductor layer through the second shadow mask with a laser beam, wherein the laser beam directly irradiates into the portion of the semiconductor layer exposed by the second shadow mask so as to directly remove the portion of the semiconductor layer to form a channel layer; forming a second conductive layer on the channel layer and the gate insulating layer; providing a third shadow mask above the second conductive layer, wherein the third shadow mask exposes a portion of the second conductive layer; irradiating the second conductive layer through the third shadow mask with a laser beam, wherein the laser beam directly irradiates into the portion of the second conductive layer exposed by the third shadow mask so as to form a source electrode and a drain electrode on the channel layer at both sides of the gate electrode, wherein the gate electrode, the channel layer, the source electrode, and the drain electrode constitute a thin film transistor (TFT); forming a passivation layer on the gate insulating layer and the TFT; providing a fourth shadow mask above the passivation layer, wherein the fourth shadow mask exposes a portion of the passivation layer; irradiating the passivation layer through the fourth shadow mask with a laser beam, wherein the laser beam directly irradiates into the portion of the passivation layer exposed by the fourth shadow mask so as to form a contact opening in the passivation layer, wherein the contact opening exposes a portion of the drain electrode; forming a third conductive layer to cover the passivation layer; providing a fifth shadow mask above the third conductive layer, wherein the fifth shadow mask exposes a portion of the third conductive layer; and irradiating the third conductive layer through the fifth shadow mask with a laser beam, wherein the laser beam directly irradiates into the portion of the third conductive layer exposed by the fifth shadow mask so as to make the remaining third conductive layer to form a pixel electrode, wherein the pixel electrode is connected to the drain through the contact opening.