SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME
First Claim
1. A method for manufacturing a semiconductor device, the method comprising:
- forming a first insulating film on a semiconductor substrate;
processing the first insulating film into a predetermined pattern;
forming a first gate electrode structure on the first insulating film, the first gate electrode structure having a smaller width than that of the processed first insulating film in a channel length direction;
introducing a first impurity of a first conductivity type into the semiconductor substrate via the processed first insulting film using the first gate electrode structure as a mask; and
introducing a second impurity of the first conductivity type into the semiconductor substrate using the first gate electrode structure and the first insulating film as a mask.
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Abstract
According to one embodiment, a method for manufacturing a semiconductor device comprises forming a first insulating film on a semiconductor substrate, processing the first insulating film into a predetermined pattern, forming a first gate electrode structure on the first insulating film, the first gate electrode structure having a smaller width than that of the processed first insulating film in a channel length direction, introducing a first impurity of a first conductivity type into the semiconductor substrate via the processed first insulting film using the first gate electrode structure as a mask, and introducing a second impurity of the first conductivity type into the semiconductor substrate using the first gate electrode structure and the first insulating film as a mask.
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Citations
20 Claims
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1. A method for manufacturing a semiconductor device, the method comprising:
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forming a first insulating film on a semiconductor substrate; processing the first insulating film into a predetermined pattern; forming a first gate electrode structure on the first insulating film, the first gate electrode structure having a smaller width than that of the processed first insulating film in a channel length direction; introducing a first impurity of a first conductivity type into the semiconductor substrate via the processed first insulting film using the first gate electrode structure as a mask; and introducing a second impurity of the first conductivity type into the semiconductor substrate using the first gate electrode structure and the first insulating film as a mask. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A semiconductor device comprising:
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paired first impurity diffusion regions of a P type formed in a surface region of a semiconductor substrate; paired second impurity diffusion regions of a P type sandwiched between the paired first impurity diffusion regions and formed adjacent to the paired first impurity diffusion regions, the paired second impurity diffusion regions having a lower impurity concentration than that of the first impurity diffusion regions; a channel region sandwiched between the paired second impurity diffusion regions; a gate insulating film formed on the second impurity diffusion regions and on the channel region; and a gate electrode formed on the gate insulating film and substantially immediately above the channel region and having a smaller width than that of the gate insulating film in a channel length direction, wherein the paired first impurity diffusion regions are formed in a self-aligned manner with respect to the gate insulating film. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification