Thin film transistor-liquid crystal display and manufacturing method therefor

A method for manufacturing a thin film transistor-liquid crystal display, comprising:

• depositing a gate metal on a substrate;
• forming a gate electrode by etching the gate metal;
• depositing an insulating layer on the gate electrode;
• depositing an amorphous silicon layer on the insulating layer;
• depositing an n+ amorphous silicon layer on the amorphous silicon layer;
• depositing a source/drain metal layer on the n+ amorphous silicon layer;
• after depositing the source/drain metal layer, etching the three layers of the source/drain metal layer, the n+ amorphous silicon layer and the amorphous silicon layer until the insulating layer is exposed such that the three layers have substantially the same layer pattern;
• etching the source/drain metal layer and the n+ amorphous silicon layer to form a source electrode and a drain electrode separated from each other and to expose a portion of the amorphous silicon layer between the source electrode and the drain electrode;
• and
• depositing a passivation layer covering the exposed portion of said amorphous silicon layer and the exposed portion of the insulating layer,
• wherein the etching the source/drain metal layer and the n+ amorphous silicon layer is performed after the etching the three layers.