Patent ID: 11968823
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 13:
14. A semiconductor device comprising:
a substrate having a cell region, a peripheral region, and an interface region between the cell region and the peripheral region, the peripheral region including an active pattern, and the interface region including a device isolation layer;
a cell gate structure buried in the substrate of the cell region, and extending in the device isolation layer of the interface region of the substrate, the cell gate structure including a cell gate pattern, and a cell gate capping layer that is disposed on the cell gate pattern;
a bit line structure arranged on the cell region of the substrate, and extending on the device isolation layer of the interface region of the substrate, the bit line structure crossing the cell gate structure, the bit line structure including a bit line pattern, and a bit line capping layer that is disposed on the bit line pattern;
a peripheral gate structure arranged on the peripheral region of the substrate, and including a peripheral gate pattern and a peripheral gate capping layer that is disposed on the peripheral gate pattern;
an insulation layer on the interface region and the peripheral region of the substrate, and including a first insulation layer and a second insulation layer that is disposed on the first insulation layer;
a first direct contact passing through the insulation layer and the cell gate capping layer of the cell gate structure, and connected to the cell gate pattern of the cell gate structure;
a second direct contact passing through the insulation layer, and connected to the active pattern of the peripheral region of the substrate; and
a third direct contact passing through the bit line capping layer of the bit line structure, and connected to the bit line pattern of the bit line structure,
wherein the first direct contact includes an extension that is disposed in the second insulation layer of the insulation layer,
wherein the extension of the first direct contact includes a first horizontal width that is adjacent to a top surface of the second insulation layer of the insulation layer, and a second horizontal width that is adjacent to a bottom surface of the second insulation layer of the insulation layer,
wherein the first horizontal width of the extension of the first direct contact is greater than the second horizontal width of the extension of the first direct contact, and
wherein a vertical length of the first direct contact is greater than a vertical length of each of the second direct contact and the third direct contact.