摘要:
A protection layer is formed on a semiconductor substrate having a cell array region and an alignment key region. A plurality of data storage elements are formed on the protection layer in the cell array region. An insulating layer is formed on the data storage elements, a barrier layer is formed on the insulating layer, and a sacrificial layer is formed on the barrier layer. The sacrificial layer, the barrier layer and the insulating layer are patterned to form contact holes that expose the data storage elements, and conductive plugs are formed in the contact holes. The sacrificial layer is etched to leave portions of the conductive plugs protruding from the barrier layer. The protruding portions of the conductive plugs are removed by polishing.
摘要:
A dielectric layer is formed on a region of a microelectronic substrate. A sacrificial layer is formed on the dielectric layer, and portions of the sacrificial layer and the dielectric layer are removed to form an opening that exposes a portion of the region. A conductive layer is formed on the sacrificial layer and in the opening. Portions of the sacrificial layer and the conductive layer on the dielectric layer are removed to leave a conductive plug in the dielectric layer and in contact with the region. Removal of the sacrificial layer and portions of the conductive layer on the dielectric layer may include polishing to expose the sacrificial layer and to leave a conductive plug in the sacrificial layer and the dielectric layer, etching the sacrificial layer to expose the dielectric layer and leave a portion of the conductive plug protruding from the dielectric layer, and polishing to remove the protruding portion of the conductive plug. Phase-change memory devices formed by such techniques are also discussed.
摘要:
A protection layer is formed on a semiconductor substrate having a cell array region and an alignment key region. A plurality of data storage elements are formed on the protection layer in the cell array region. An insulating layer is formed on the data storage elements, a barrier layer is formed on the insulating layer, and a sacrificial layer is formed on the barrier layer. The sacrificial layer, the barrier layer and the insulating layer are patterned to form contact holes that expose the data storage elements, and conductive plugs are formed in the contact holes. The sacrificial layer is etched to leave portions of the conductive plugs protruding from the barrier layer. The protruding portions of the conductive plugs are removed by polishing.
摘要:
A protection layer is formed on a semiconductor substrate having a cell array region and an alignment key region. A plurality of data storage elements are formed on the protection layer in the cell array region. An insulating layer is formed on the data storage elements, a barrier layer is formed on the insulating layer, and a sacrificial layer is formed on the barrier layer. The sacrificial layer, the barrier layer and the insulating layer are patterned to form contact holes that expose the data storage elements, and conductive plugs are formed in the contact holes. The sacrificial layer is etched to leave portions of the conductive plugs protruding from the barrier layer. The protruding portions of the conductive plugs are removed by polishing.
摘要:
A dielectric layer is formed on a region of a microelectronic substrate. A sacrificial layer is formed on the dielectric layer, and portions of the sacrificial layer and the dielectric layer are removed to form an opening that exposes a portion of the region. A conductive layer is formed on the sacrificial layer and in the opening. Portions of the sacrificial layer and the conductive layer on the dielectric layer are removed to leave a conductive plug in the dielectric layer and in contact with the region. Removal of the sacrificial layer and portions of the conductive layer on the dielectric layer may include polishing to expose the sacrificial layer and to leave a conductive plug in the sacrificial layer and the dielectric layer, etching the sacrificial layer to expose the dielectric layer and leave a portion of the conductive plug protruding from the dielectric layer, and polishing to remove the protruding portion of the conductive plug. Phase-change memory devices formed by such techniques are also discussed.
摘要:
A dielectric layer is formed on a region of a microelectronic substrate. A sacrificial layer is formed on the dielectric layer, and portions of the sacrificial layer and the dielectric layer are removed to form an opening that exposes a portion of the region. A conductive layer is formed on the sacrificial layer and in the opening. Portions of the sacrificial layer and the conductive layer on the dielectric layer are removed to leave a conductive plug in the dielectric layer and in contact with the region. Removal of the sacrificial layer and portions of the conductive layer on the dielectric layer may include polishing to expose the sacrificial layer and to leave a conductive plug in the sacrificial layer and the dielectric layer, etching the sacrificial layer to expose the dielectric layer and leave a portion of the conductive plug protruding from the dielectric layer, and polishing to remove the protruding portion of the conductive plug. Phase-change memory devices formed by such techniques are also discussed.
摘要:
A dielectric layer is formed on a region of a microelectronic substrate. A sacrificial layer is formed on the dielectric layer, and portions of the sacrificial layer and the dielectric layer are removed to form an opening that exposes a portion of the region. A conductive layer is formed on the sacrificial layer and in the opening. Portions of the sacrificial layer and the conductive layer on the dielectric layer are removed to leave a conductive plug in the dielectric layer and in contact with the region. Removal of the sacrificial layer and portions of the conductive layer on the dielectric layer may include polishing to expose the sacrificial layer and to leave a conductive plug in the sacrificial layer and the dielectric layer, etching the sacrificial layer to expose the dielectric layer and leave a portion of the conductive plug protruding from the dielectric layer, and polishing to remove the protruding portion of the conductive plug. Phase-change memory devices formed by such techniques are also discussed.
摘要:
A method of fabricating a phase change memory device includes the use of first, second and third polishing processes. The first polishing process forms a first contact portion using a first sacrificial layer and the second polishing process forms a phase change material pattern using a second sacrificial layer. After removing the first and second sacrificial layers to expose resultant protruding structures of the first contact portion and the phase change material pattern, a third polishing process is used to polish the resultant protruding structures using an insulation layer as a polishing stopper layer.
摘要:
A contact structure that includes a first pattern formed on a substrate, wherein the first pattern has a recessed region in an upper surface thereof, a planarized buffer pattern formed on the first pattern, and a conductive pattern formed on the planarized buffer pattern.
摘要:
A contact structure that includes a first pattern formed on a substrate, wherein the first pattern has a recessed region in an upper surface thereof, a planarized buffer pattern formed on the first pattern, and a conductive pattern formed on the planarized buffer pattern.