Patent ID: 7012026
Filing Date: 2006-03-14
Classification: G01L,H01L

Abstract:
1. A method of producing a polycrystalline silicon electrically-conducting region, comprising: providing a substrate with an insulating layer and a layer of doped amorphous silicon; positioning a shadow mask having an opening, between a laser source and the substrate having the insulating layer and the doped amorphous silicon layer, wherein a contour of the shadow mask opening defines a contour of the electrically conducting region; performing electromagnetic irradiation on the doped amorphous silicon using the laser source to produce the polycrystalline silicon electrically conducting region; depositing a metallic layer at least partially above the electrically conducting region; and before the depositing step: removing remaining portions of amorphous silicon selectively, in a plasma containing one of hydrogen and halogen without using a photolithographic step; and applying a passivation layer covering at least the electrically conducting region.