Method of manufacturing a semiconductor device having selective epitaxial silicon layer on contact pads
First Claim
1. A method of manufacturing a semiconductor device comprising:
- forming wirings separated from each other on a semiconductor substrate, each of the wirings including a first conductive layer pattern and an insulating mask layer pattern formed on the first conductive layer pattern;
forming insulating spacers on sidewalls of the wirings;
forming self-aligned contact pads including portions of a second conductive layer, each of the self-aligned contact pads making contact with surfaces of the insulating spacers to fill a gap between the wirings;
forming an interlayer dielectric layer on the substrate wherein the contact pads are formed;
partially etching the interlayer dielectric layer to form contact holes exposing the contact pads; and
forming a selective epitaxial silicon layer on the contact pads exposed through the contact holes to cover the insulating mask layer pattern.
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Accused Products
Abstract
Wirings including first conductive layer patterns and insulating mask layer patterns are formed on a substrate. Insulating spacers are formed on sidewalls of the wirings. Self-aligned contact pads including portions of a second conductive layer are formed to contact with surfaces of the insulating spacers and to fill up a gap between the wirings. An interlayer dielectric layer is formed on the substrate where the contact pads are formed and is then partially etched to form contact holes exposing the contact pads. A selective epitaxial silicon layer is formed on the contact pads exposed through the contact holes to cover the insulating mask layer patterns. Thus, a short-circuit between the lower wiring and an upper wiring formed in the contact holes is prevented.
27 Citations
24 Claims
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1. A method of manufacturing a semiconductor device comprising:
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forming wirings separated from each other on a semiconductor substrate, each of the wirings including a first conductive layer pattern and an insulating mask layer pattern formed on the first conductive layer pattern; forming insulating spacers on sidewalls of the wirings; forming self-aligned contact pads including portions of a second conductive layer, each of the self-aligned contact pads making contact with surfaces of the insulating spacers to fill a gap between the wirings; forming an interlayer dielectric layer on the substrate wherein the contact pads are formed; partially etching the interlayer dielectric layer to form contact holes exposing the contact pads; and forming a selective epitaxial silicon layer on the contact pads exposed through the contact holes to cover the insulating mask layer pattern. - View Dependent Claims (2, 3, 4)
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5. A method of manufacturing a semiconductor device comprising:
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forming wirings separated from each other on a semiconductor substrate, each of the wirings including a first conductive layer pattern and an insulating mask layer pattern formed on the first conductive layer pattern; forming insulating spacers on sidewalls of the wirings; forming at least two self-aligned contact pads using mask patterns having bar shapes that include openings having at least two different contact regions, each of the at least two self-aligned contact pads in contact with portions of the substrate between the wirings; forming an interlayer dielectric layer on the substrate where the at least two self-aligned contact pads are formed; partially etching the interlayer dielectric layer to form a contact hole exposing one of the at least two self-aligned contact pads; and forming a selective epitaxial silicon layer on the one of the at least two self-aligned contact pads to cover the insulating mask layer pattern. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of manufacturing a semiconductor device comprising:
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forming gate lines that cross active regions on a semiconductor substrate, wherein each of the gate lines includes a gate mask layer pattern and gate spacers formed on sidewalls of the gate mask layer pattern so that storage node contact regions and bit line contact regions are formed on portions of the substrate between the gate lines; forming first contact pads connected to the storage node contact regions and second contact pads connected to the bit line contact regions using self-aligned contact mask patterns having bar shapes that include openings exposing the active regions; forming an interlayer dielectric layer on the substrate where the first and second contact pads are formed; partially etching the interlayer dielectric layer to form storage node contact holes having line shapes so that one first contact pad and an adjacent first contact pad arranged in a direction substantially parallel to the gate lines are exposed by each of the storage node contact holes; forming a selective epitaxial silicon layer on the first contact pads exposed by the storage node contact holes to cover the gate mask layer patterns; and forming storage node contact plugs in the storage node contact holes, wherein the storage node contact plugs are electrically connected to the first contact pads. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification