Fin field effect transistors having liners between device isolation layers and active areas of the device
First Claim
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1. An integrated circuit device comprising:
- a first fin-type active area protruding from a first region of a substrate and comprising a first channel region of a first conductivity type;
a plurality of liners covering lower side walls of the first fin-type active area on the first region, wherein the plurality of liners comprise a first insulating liner and a first stress liner including materials different from each other, wherein the first insulating liner contacts the lower side walls of the first fin-type active area and has a first upper surface at a first height from the substrate, wherein the first stress liner is spaced apart from the lower side walls of the first fin-type active area and has a second upper surface at a second height from the substrate, and wherein the first insulating liner is between the first stress liner and the lower side walls of the first fin-type active area, and the second height is higher than the first height;
a first device isolation layer covering the lower side walls of the first fin-type active area, wherein the plurality of liners are between the first device isolation layer and the lower side walls of the first fin-type active area on the first region;
a first gate insulating layer on the first region, the first gate insulating layer extending to cover the first channel region of the first fin-type active area, the plurality of liners, and the first device isolation layer, and comprising first protrusions located on portions of the first gate insulating layer which cover the plurality of liners;
a second fin-type active area protruding from a second region of the substrate and comprising a second channel region of a second conductivity type;
a second device isolation layer covering lower side walls of the second fin-type active area on the second region;
a second insulating liner covering the lower side walls of the second fin-type active area, wherein the second insulating liner is between the second fin-type active area and the second device isolation layer on the second region; and
a second gate insulating layer on the second region, the second gate insulating layer extending to cover the second channel region, the second insulating liner, and the second device isolation layer.
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Abstract
An integrated circuit device includes a fin-type active area protruding from a substrate; a plurality of liners sequentially covering lower side walls of the fin-type active area; a device isolation layer covering the lower side walls of the fin-type active area with the plurality of liners between the device isolation layer and the fin-type active area; and a gate insulating layer extending to cover a channel region of the fin-type active area, the plurality of liners, and the device isolation layer, and including protrusions located on portions of the gate insulating layer which cover the plurality of liners.
23 Citations
19 Claims
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1. An integrated circuit device comprising:
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a first fin-type active area protruding from a first region of a substrate and comprising a first channel region of a first conductivity type; a plurality of liners covering lower side walls of the first fin-type active area on the first region, wherein the plurality of liners comprise a first insulating liner and a first stress liner including materials different from each other, wherein the first insulating liner contacts the lower side walls of the first fin-type active area and has a first upper surface at a first height from the substrate, wherein the first stress liner is spaced apart from the lower side walls of the first fin-type active area and has a second upper surface at a second height from the substrate, and wherein the first insulating liner is between the first stress liner and the lower side walls of the first fin-type active area, and the second height is higher than the first height; a first device isolation layer covering the lower side walls of the first fin-type active area, wherein the plurality of liners are between the first device isolation layer and the lower side walls of the first fin-type active area on the first region; a first gate insulating layer on the first region, the first gate insulating layer extending to cover the first channel region of the first fin-type active area, the plurality of liners, and the first device isolation layer, and comprising first protrusions located on portions of the first gate insulating layer which cover the plurality of liners; a second fin-type active area protruding from a second region of the substrate and comprising a second channel region of a second conductivity type; a second device isolation layer covering lower side walls of the second fin-type active area on the second region; a second insulating liner covering the lower side walls of the second fin-type active area, wherein the second insulating liner is between the second fin-type active area and the second device isolation layer on the second region; and a second gate insulating layer on the second region, the second gate insulating layer extending to cover the second channel region, the second insulating liner, and the second device isolation layer. - View Dependent Claims (2, 3, 4)
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5. An integrated circuit device comprising:
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a fin-type active area protruding from a substrate; a first liner extending along a first lower side wall of the fin-type active area and spaced apart therefrom; a first device isolation layer covering the first lower side wall of the fin-type active area, wherein the first liner is between the first device isolation layer and the first lower side wall of the fin-type active area and an upper end of the first liner protrudes from an upper surface of the first device isolation layer; a second liner covering a second lower side wall of the fin-type active area, wherein the second lower side wall is opposite to the first lower side wall; a second device isolation layer covering the second lower side wall of the fin-type active area, wherein the second liner is between the second device isolation layer and the second lower side wall of the fin-type active area; and a first gate insulating layer extending to cover the fin-type active area, the first liner, and the first device isolation layer, and comprising a first protrusion which cover the upper end of the first liner, wherein the first protrusion of the first gate insulating layer contacts an upper surface of the upper end of the first liner and opposite side walls thereof. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. An integrated circuit device comprising:
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a fin-type active area disposed on a substrate; a liner covering at least a portion of side walls of the fin-type active area; a device isolation layer disposed on the liner; a gate insulating layer disposed on the liner and on the device isolation layer, the gate insulating layer including protrusions covering the liner; and a gate line covering the gate insulating layer and a channel region of the fin-type active area, wherein the gate line comprises recessed surface portions contacting the protrusions. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification