Abstract:
An amorphous silicon thin film is formed on a substrate first. Then the thin film is irradiated by a laser plus having an irradiation interval along a first direction to re-crystallize the thin film into a polysilicon thin film. A light source is thereafter focused into a micro spot having a diameter smaller than the irradiation interval, and the polysilicon thin film is irradiated by the micro spot moving along the first direction and having a relative moving distance to obtain a spectrum.
Abstract:
A method of fabricating a polysilicon film by an excimer laser crystallization process. First, a substrate comprising a first region and a second region is provided. An amorphous silicon layer and a mask layer are formed on the substrate in sequence. Then, a photo-etching process is performed to remove the mask layer in the first region. A heat-retaining capping layer is formed on the mask layer and the amorphous silicon layer. After that, an excimer laser crystallization process is performed so that the amorphous silicon layer in the first region is crystallized into a polysilicon film.
Abstract:
A method of fabricating a polysilicon film by an excimer laser crystallization process is disclosed. First, a substrate with a first region, a second region surrounding the first region, and a third region is provided. An amorphous silicon film is formed on the substrate. A photo-etching process is performed to remove parts of amorphous silicon film in the third region to form an alignment mark. Then, a mask layer is formed on the amorphous silicon film and a second photo-etching process is performed to remove the mask layer in the first region to expose the amorphous silicon film in the first region. After that, an excimer laser irradiation process is performed so that the amorphous silicon film in the first region is crystallized and becomes a polysilicon film.