Method for manufacturing a semiconductor device
First Claim
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1. A method for manufacturing a semiconductor device comprising the steps of:
- preparing a solution by dissolving or dispersing a substance in a liquid, said substance containing a catalyst for promoting a crystallization of silicon;
disposing said solution in contact with at least a portion of a semiconductor film comprising silicon on an insulating surface;
forming a continuous layer containing said catalyst in contact with said semiconductor film; and
crystallizing said semiconductor film by heating,wherein said catalyst is included in said solution at a concentration of 200 ppm or lower.
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Abstract
A process for fabricating a highly stable and reliable semiconductor, comprising: coating the surface of an amorphous silicon film with a solution containing a catalyst element capable of accelerating the crystallization of the amorphous silicon film, and heat treating the amorphous silicon film thereafter to crystallize the film.
1484 Citations
32 Claims
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1. A method for manufacturing a semiconductor device comprising the steps of:
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preparing a solution by dissolving or dispersing a substance in a liquid, said substance containing a catalyst for promoting a crystallization of silicon; disposing said solution in contact with at least a portion of a semiconductor film comprising silicon on an insulating surface; forming a continuous layer containing said catalyst in contact with said semiconductor film; and crystallizing said semiconductor film by heating, wherein said catalyst is included in said solution at a concentration of 200 ppm or lower. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for manufacturing a semiconductor device comprising the steps of:
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preparing a solution by dissolving or dispersing a substance in a liquid, said substance containing a catalyst for promoting a crystallization of silicon; disposing said solution in contact with at least a first region of a semiconductor film comprising silicon on an insulating surface; forming a continuous layer including said catalyst in contact with said first region of said semiconductor film; and heating said semiconductor film in order that crystals grow from said first region toward a second region of the semiconductor film adjacent to said first region in a direction parallel with a surface of said semiconductor film; patterning said semiconductor film into an island to form an active region of said semiconductor, said island excluding said first region of the semiconductor film, wherein said semiconductor film comprises said catalyst at a concentration not higher than 1×
1019 cm-3. - View Dependent Claims (19, 20, 21)
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22. A method for manufacturing a semiconductor device comprising the steps of:
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preparing a solution by dissolving or dispersing a substance in a liquid, said substance containing a catalyst for promoting a crystallization of silicon; disposing said solution in contact with at least a first portion of a semiconductor film comprising silicon on an insulating surface; heating said semiconductor film in order that crystals grow from said first portion toward a second portion of the semiconductor film to which said crystallization promoting material is not added, and forming said semiconductor device by using said second portion of the semiconductor film as an active region of said semiconductor device, said active region excluding said first portion, wherein said semiconductor film comprises said catalyst at a concentration of 1×
1019 atoms/cm3 or less. - View Dependent Claims (23, 24)
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25. A method for manufacturing a semiconductor device comprising the steps of:
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preparing a solution containing a substance dissolved or dispersed in a liquid, said substance containing a catalyst for promoting a crystallization of silicon, and said liquid including an interfacial active agent; disposing said solution in contact with a semiconductor film comprising silicon on an insulating surface; forming a continuous layer containing said catalyst in contact with said semiconductor film; and
thencrystallizing said semiconductor film by heating. - View Dependent Claims (26, 27, 28)
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29. A method for manufacturing a semiconductor device comprising the steps of:
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preparing a solution containing a substance dissolved or dispersed in a liquid, said substance containing a catalyst for promoting a crystallization of silicon; forming a semiconductor film on an insulating film; forming a thin oxide film in contact with said semiconductor film; disposing said solution in contact with at least a portion of said semiconductor film through said thin oxide film; forming a continuous layer including said substance in contact with said semiconductor film; and
thencrystallizing said semiconductor film by heating. - View Dependent Claims (30, 31, 32)
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Specification