摘要:
A process for preparing a metallic interconnecting plug in a semiconductor device which comprises the steps of: i) forming an insulating layer on the surface of a semiconductor substrate or a metal underlayer of the semiconductor device, ii) forming a hole in the insulating layer to expose the surface of the semiconductor substrate or the metal underlayer, iii) exposing the surface of the insulating layer to the vapor of a blocking agent under a pressure ranging from 10.sup.-12 to 10 torr for a controlled time period so that a blocking layer is formed only on the outer surface of the insulating layer, the blocking layer not extending over the inside walls of the hole, iv) selectively depositing a conductive metal in the hole using a chemical vapor deposition method to form the metallic interconnecting plug which extends from the surface of the semiconductor substrate or the metal underlayer to the level of the outer surface of the insulating layer, and v) removing the blocking layer from the surface of the insulating layer.
摘要:
A method of fabricating a semiconductor device includes forming a preliminary gate pattern on a semiconductor substrate. The preliminary gate pattern includes a gate oxide pattern, a conductive pattern, and a sacrificial insulating pattern. The method further includes forming spacers on opposite sidewalls of the preliminary gate pattern, forming an interlayer dielectric pattern to expose the sacrificial insulating pattern, removing the sacrificial insulating pattern to form an opening to expose the conductive pattern, transforming the conductive pattern into a metal silicide layer and forming a metal barrier pattern along an inner profile of the opening and a metal conductive pattern to fill the opening including the metal barrier pattern. The metal silicide layer and the metal conductive pattern constitute a gate electrode.
摘要:
Methods of forming field effect transistors according to embodiments of the invention include forming a conductive gate electrode (e.g., polysilicon gate electrode) on a semiconductor substrate and forming a first metal layer on the conductive gate electrode. This first metal layer may include a material selected from a group consisting of nickel, cobalt, titanium, tantalum and tungsten. The first metal layer and the conductive gate electrode are thermally treated for a sufficient duration to convert a first portion of the conductive gate electrode into a first metal silicide region. The first metal layer and the first metal silicide region are then removed to expose a second portion of the conductive gate electrode. A second metal layer is then formed on the second portion of the conductive gate electrode. This second metal layer may include a material selected from a group consisting of nickel, cobalt, titanium, tantalum and tungsten. The second metal layer and the second portion of the conductive gate electrode are thermally treated for a sufficient duration to thereby convert the second portion of the conductive gate electrode into a second metal silicide region.
摘要:
A stacked semiconductor device comprises a lower transistor formed on a semiconductor substrate, a lower interlevel insulation film formed on the semiconductor substrate over the lower transistor, an upper transistor formed on the lower interlayer insulation film over the lower transistor, and an upper interlevel insulation film formed on the lower interlevel insulation film over the upper transistor. The stacked semiconductor device further comprises a contact plug connected between a drain or source region of the lower transistor and a source or drain region of the upper transistor, and an extension layer connected to a lateral face of the source or drain region of the upper transistor to enlarge an area of contact between the source or drain region of the upper transistor and a side of the contact plug.
摘要:
A method of forming an ohmic contact layer including forming an insulation layer pattern on a substrate, the insulation pattern layer having an opening selectively exposing a silicon bearing layer, forming a metal layer on the exposed silicon bearing layer using an electrode-less plating process, and forming a metal silicide layer from the silicon bearing layer and the metal layer using a silicidation process. Also, a method of forming metal wiring in a semiconductor device using the foregoing method of forming an ohmic contact layer.
摘要:
A method of forming an ohmic contact layer including forming an insulation layer pattern on a substrate, the insulation pattern layer having an opening selectively exposing a silicon bearing layer, forming a metal layer on the exposed silicon bearing layer using an electrode-less plating process, and forming a metal silicide layer from the silicon bearing layer and the metal layer using a silicidation process. Also, a method of forming metal wiring in a semiconductor device using the foregoing method of forming an ohmic contact layer.
摘要:
A semiconductor device includes a plurality of channel structures on a semiconductor substrate. A bit line groove having opposing sidewalls is defined between sidewalls of adjacent ones of the plurality of channel structures. A plurality of bit lines are formed on corresponding ones of the opposing sidewalls, and the plurality of bit lines are electrically isolated from each other
摘要:
There is provided a method of forming a semiconductor device having stacked transistors. When forming a contact hole for connecting the stacked transistors to each other, ohmic layers on the bottom and the sidewall of the common contact hole are separately formed. As a result, the respective ohmic layers are optimally formed to meet requirements or conditions. Accordingly, the contact resistance of the common contact may be minimized so that it is possible to enhance the speed of the semiconductor device.
摘要:
Methods of forming metal silicide layers in a semiconductor device are provided in which a first metal silicide layer may be formed on a substrate, where the first metal silicide layer comprises a plurality of fragments of a metal silicide that are separated by one or more gaps. A conductive material is selectively deposited into at least some of the gaps in the first metal silicide layer in order to electrically connect at least some of the plurality of fragments.
摘要:
A method of forming a semiconductor device may include forming an interlayer insulating layer on a semiconductor substrate, and the interlayer insulating layer may have a contact hole therein exposing a portion of the semiconductor substrate. A single crystal semiconductor plug may be formed in the contact hole and on portions of the interlayer insulating layer adjacent the contact hole opposite the semiconductor substrate, and portions of the interlayer insulating layer opposite the semiconductor substrate may be free of the single crystal semiconductor plug. Portions of the single crystal semiconductor plug in the contact hole may be removed while maintaining portions of the single crystal semiconductor plug on portions of the interlayer insulating layer adjacent the contact hole as a single crystal semiconductor contact pattern. After removing portions of the single crystal semiconductor plug, a single crystal semiconductor layer may be formed on the interlayer insulating layer and on the single crystal semiconductor contact pattern. A second interlayer insulating layer may be formed on the single crystal semiconductor layer, and a common contact hole may be formed through the second interlayer insulating layer, through the single crystal semiconductor layer, and through the first interlayer insulating layer to expose a portion of semiconductor substrate. In addition, a conductive contact plug may be formed in the common contact hole in contact with the semiconductor substrate. Related devices are also discussed.