Patent Publication Number: US-2022228257-A1

Title: Tungsten deposition on a cobalt surface

Description:
BACKGROUND 
     For fin field-effect transistor (FinFET) structures, such as a 5 nanometer (nm) node, cobalt material may be used as a contact plug and tungsten material may be disposed on an upper surface of the cobalt material to form a tungsten via of a contact loop. A process for forming the contact loop may include deposition of a titanium-based material into a cavity of a semiconductor device (e.g., a silicon wafer), rapid thermal heat annealing, deposition of cobalt within the cavity of the semiconductor device, planarization of the cobalt, and then deposition of tungsten material for the tungsten via. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Aspects of the present disclosure are best understood from the following detailed description when read with the accompanying figures. It is noted that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. 
         FIG. 1  is a diagram of an example environment in which systems and/or methods described herein may be implemented. 
         FIGS. 2A-2E  are diagrams of one or more example implementations described herein. 
         FIG. 3  is a diagram of an example semiconductor device formed based on the example techniques described in connection with  FIGS. 2A-2E . 
         FIG. 4  is a diagram of example components of one or more devices of  FIG. 1 . 
         FIGS. 5 and 6  are flowcharts of examples of tungsten deposition on a cobalt surface. 
     
    
    
     DETAILED DESCRIPTION 
     The following disclosure provides many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. 
     Further, spatially relative terms, such as “outer,” “lower,” “above,” “upper” and the like, may be used herein for ease of description to describe one element or feature&#39;s relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The apparatus may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein may likewise be interpreted accordingly. 
     In some cases, processes for forming a contact loop may include deposition of a titanium-based material into a cavity of a semiconductor device (e.g., a silicon wafer), rapid thermal heat annealing, depositing cobalt within the cavity of the semiconductor device, planarizing the cobalt, and then depositing tungsten material for the tungsten via. However, this process may result in relatively high resistivity between the tungsten material and the cobalt material based on the tungsten via being nonuniform and/or oxygen or nitrogen bonded to the cobalt material between the cobalt material and the tungsten material. 
     Some implementations described herein provide techniques and apparatuses for tungsten deposition on a cobalt surface. In some implementations described herein, a process for forming a contact loop may include depositing cobalt material within a cavity of a semiconductor device (e.g., as a contact plug). The process may also include polishing an upper surface of the cobalt material to form a planarized upper surface of the cobalt material. The process may further include performing a hydrogen soak (e.g., with hydrogen gas) before depositing tungsten material (e.g., a tungsten via) onto an upper surface of the cobalt material. 
     In some implementations, the hydrogen soak may cause greater than 50% (e.g., a majority) of the cobalt material (e.g., greater than 50% of the upper surface of the cobalt material) to be in a hexagonal close-packed (HCP) phase, which may improve contact resistance between the cobalt material and the tungsten material. In some implementations, the contact resistance may be reduced (e.g., to about 375 ohms from about 588 ohms) for a tungsten via in a FinFET structure. In some implementations, the hydrogen soak may prevent or reduce bonding of nitrogen and/or oxygen with the upper surface of the cobalt material. In some implementations, the hydrogen soak may remove nitrogen and/or oxygen from the upper surface of the cobalt material before depositing the tungsten material. 
       FIG. 1  is a diagram of an example environment  100  in which systems and/or methods described herein may be implemented. As shown in  FIG. 1 , environment  100  may include a plurality of semiconductor processing tools  102 - 108  and a wafer/die transport device  110 . The plurality of semiconductor processing tools  102 - 108  may include a deposition tool  102 , a soaking tool  104 , a chemical-mechanical polishing (CMP) tool  106 , an etching tool  108 , and/or other the like. The semiconductor processing tools included in example environment  100  may be included in a semiconductor clean room, a semiconductor foundry, a semiconductor processing and/or manufacturing facility, and/or the like. 
     Deposition tool  102  is a semiconductor processing tool that includes a semiconductor processing chamber and one or more devices capable of depositing various types of materials onto a semiconductor device. For example, deposition tool  102  may include a chemical vapor deposition device (e.g., an electrostatic spray device, an epitaxy device, and/or another type of chemical vapor deposition device), a physical vapor deposition device (e.g., a metal deposition device, a sputtering device, and/or another type of physical vapor deposition device), an atomic layer deposition device, and/or the like. In some implementations, deposition tool  102  may deposit a metal layer onto a source region or a drain region of a semiconductor device, may deposit a contact material to form a contact (e.g., a self-aligned contact) of a semiconductor device, and/or the like as described herein. 
     Soaking tool  104  is a semiconductor processing tool that includes one or more devices capable of soaking material of a surface of a wafer or a semiconductor device. For example, soaking tool  104  may include a chamber into which a gas may be filled to react with material on a surface of a wafer or displace other gaseous material. In some implementations, soaking tool  104  may include a vacuum pump to remove and/or reduce gaseous material from the chamber, a gas inlet through which desired soaking gas may enter the chamber, and/or the like. In some implementations, the desired soaking gas may react with material on a surface of a wafer or displace other gaseous material from the surface of the wafer or the semiconductor device (e.g., based on relative densities of the soaking gas and the other gaseous material. 
     CMP tool  106  is a semiconductor processing tool that includes one or more device capable of polishing or planarizing various layers of a wafer or semiconductor device. In some implementations, CMP tool  106  may polish or planarize a layer of deposited or plated material. 
     Etching tool  108  is a semiconductor processing tool that includes one or more devices capable of etching (e.g., removing) material from a surface of a wafer or a semiconductor device. For example, etching tool  108  may include a wet etching device, a dry etching device, a laser etching device, a chemical etching device, a plasma etching device, a reactive ion etching device, a sputter etching device, a vapor phase etching device, and/or the like. In some implementations, etching tool  108  may remove a layer from a semiconductor device as described herein. 
     Wafer/die transport device  110  includes a mobile robot, a robot arm, a tram or rail car, and/or another type of device that are used to transport wafers and/or dies between semiconductor processing tools  102 - 108  and/or to and from other locations such as a wafer rack, a storage room, and/or the like. In some implementations, wafer/die transport device  110  may be a programmed device to travel a particular path and/or may operate semi-autonomously or autonomously. 
     The number and arrangement of devices shown in  FIG. 1  are provided as one or more examples. In practice, there may be additional devices, fewer devices, different devices, or differently arranged devices than those shown in  FIG. 1 . Furthermore, two or more devices shown in  FIG. 1  may be implemented within a single device, or a single device shown in  FIG. 1  may be implemented as multiple, distributed devices. Additionally, or alternatively, a set of devices (e.g., one or more devices) of environment  100  may perform one or more functions described as being performed by another set of devices of environment  100 . 
       FIGS. 2A-2E  are diagrams of one or more example implementations  200  described herein. Example implementation(s)  200  may include one or more example implementations of a process for tungsten deposition on a cobalt surface. In some implementations, example implementation(s) may include a process of forming a contact loop within a semiconductor device (e.g., a FinFET device). One or more of example implementation(s)  200  may include depositing cobalt material within a cavity of a semiconductor device, performing a CMP process on an upper surface of the cobalt material, performing a hydrogen soak on the semiconductor device, and depositing tungsten material onto an upper surface of the cobalt material. Based on performing the hydrogen soak on the semiconductor device before depositing the tungsten material, a resistivity between the cobalt material and the tungsten material may be reduced. 
     As shown in  FIG. 2A , a cavity  202  may be formed in a semiconductor device. For example, one or more semiconductor processing tools, such as a deposition tool (e.g., deposition tool  102 ) and an etching tool (e.g., etching tool  108 ), may perform one or more deposition operations and one or more etching operations to form the cavity  202 . One or more titanium-based layers may be deposited within the cavity  202 . For example, a deposition tool (e.g., deposition tool  102 ) may deposit the one or more titanium-based layers within the cavity  202 . The one or more titanium-based layers may include a titanium and silicon layer  204  (e.g., titanium disilicide) and/or a titanium, silicon, and nitrogen layer  206  (e.g., titanium silicon nitride). 
     As shown in  FIG. 2B , another titanium-based layer, that includes nitrogen (titanium nitride  208 ), may be deposited within the cavity  202 . For example, a deposition tool (e.g., deposition tool  102 ) may deposit the titanium nitride  208  onto an upper surface (e.g., an outer surface) of the one or more titanium-based layers within the cavity  202 . The titanium nitride  208  and/or the one or more titanium-based layers may adhere the cobalt material  210  within the cavity  202 . 
     As further shown in  FIG. 2B , the cavity  202  may be filled with cobalt material  210 . For example, a deposition tool (e.g., deposition tool  102 ) may deposit the cobalt material  210  onto an upper surface (e.g., an outer surface) of the titanium nitride  208  (e.g., both within and outside of the cavity  202  as shown in  FIG. 2B ). In some implementations, the deposition tool may use a metal deposition process to deposit the cobalt material  210 . In some implementations, one or more semiconductor processing tools may perform a rapid thermal anneal (RTA) process on the semiconductor device before, and/or as part of, deposition of the cobalt material  210 . 
     As shown by  FIG. 2C , an upper surface of the cobalt material  210  may be planarized and/or polished to form a cobalt-based contact plug  212 . For example, a CMP tool (e.g., CMP tool  106 ) may planarize and/or polish the upper surface of the cobalt material  210  to form the cobalt-based contact plug  212 . In some implementations, the CMP tool may remove a portion of the cobalt material  210  and/or material of one or more of the titanium-based layers that is disposed outside of the cavity  202 . In some implementations, the upper surface of the cobalt-based contact plug  212  may be coplanar with an upper surface of the semiconductor device outside of the cavity  202 . 
     As shown by  FIG. 2D , the semiconductor device may be subjected to a hydrogen soak. For example, a soaking tool (e.g., soaking tool  104 ) may perform a hydrogen soak on the semiconductor device (e.g., at approximately 20-22 degrees Celsius, at below than 20 degrees Celcius, at above 22 degrees Celsius, or at above 50 degrees Celsius). In some implementations, when performing the hydrogen soak, the soaking tool may apply hydrogen gas  214  to the semiconductor device (e.g., in a chamber) before depositing tungsten material. The soaking tool may apply the hydrogen gas  214  for at least 3 minutes (180 seconds) to prevent and/or reduce bonding of the upper surface of the cobalt-based contact plug  212  with nitrogen and/or oxygen and/or to remove impurities from the upper surface of the cobalt-based contact plug  212 . In some implementations, the soaking tool may apply the hydrogen gas  214  for a different amount of time, such as at least 1 minute (60 seconds), at least 2 minutes (120 seconds), or at least 4 minutes (240 seconds), among other examples. 
     In some implementations, the soaking tool may perform the hydrogen soak immediately after planarizing and/or polishing the upper surface of the cobalt material  210 . In this way, the hydrogen soak may prevent and/or reduce bonding of the upper surface of the cobalt-based contact plug  212  with nitrogen and/or oxygen. For example, cobalt oxide may be reduced by hydrogen gas  214  (e.g., H 2 ) to metallic cobalt. In some implementations, the soaking tool may perform the hydrogen soak immediately before depositing tungsten on the upper surface of the cobalt-based contact plug  212 . In this way, the hydrogen soak may remove impurities from the upper surface of the cobalt-based contact plug  212 . For example, the hydrogen may bond with, and/or remove, nitrogen and/or oxygen that has bonded with the upper surface of the cobalt-based contact plug  212 . 
     In some implementations, performing the hydrogen soak may induce an increased amount of HCP phase cobalt, which may improve uniformity on the upper surface of the cobalt-based contact plug  212 . With an improved uniformity, the upper surface may form an improved electrical connection (e.g., with reduced resistivity) with tungsten material deposited on the upper surface. In prior processes (e.g., without the hydrogen soak), a cobalt-based contact plug may have greater than 50% (e.g., about 67%) of the cobalt-based contact plug  212  in a face centered cubic (FCC) phase. However, based on performing the hydrogen soak, a cobalt-based contact plug may have greater than 50% of the cobalt-based contact plug  212  in an HCP phase. For example, the cobalt-based contact plug  212  may have at least 55% in the HCP phase (e.g., a ratio of HCP:FCC of 55%:45%) or about 59% in the HCP phase (e.g., a ratio of HCP:FCC of 59%:41%), or about 65% in the HCP phase (e.g., a ratio of HCP:FCC of 65%:35%), among other examples. 
     As shown in  FIG. 2E , a tungsten via  216  may be deposited onto the upper surface of the cobalt-based contact plug  212 . For example, a deposition tool (e.g., deposition tool  102 ) may deposit the tungsten via  216  onto the upper surface of the cobalt-based contact plug  212 . In some implementations, the tungsten via  216  and the cobalt-based contact plug  212  may interface at a contact plug tungsten via contact  218 . In some implementations, the deposition tool may deposit the tungsten via  216  using a vapor deposition process. In some implementations, the deposition tool may deposit the tungsten via  216  after performance of one or more deposition and/or etching operations (e.g., by etching tool  108 ) to form a cavity into which the deposition tool may deposit tungsten material to form the tungsten via. In some implementations, the etching tool may etch additional materials used to form the cavity, such as a photoresist layer, a mask, a nitride layer, and/or an oxide layer, among other examples. In some implementations, based on performing the hydrogen soak before depositing the tungsten via  216 , a resistivity between the cobalt-based contact plug  212  (e.g., at the contact plug tungsten via contact  218 ) and the tungsten via  216  may be less than about 375 ohms, and in some cases less than about 170 ohms, which may reduce an amount of a voltage drop across the tungsten via  216  and the cobalt-based contact plug  212  and/or reduce an amount of power consumed when operating the semiconductor device. In some implementations, the resistivity between the cobalt-based contact plug  212  and the tungsten via  216  may be a different amount of resistance, such as less than 400 ohms, less than about 300 ohms, or less than about 200 ohms, among other examples. In other words, based on performing the hydrogen soak on the semiconductor device before depositing the tungsten material, a resistivity between the cobalt material and the tungsten material may be reduced (e.g., by about half or by more than half, among other examples). 
     The number and arrangement of structures, layers, and/or the like shown in  FIGS. 2A-2E  are provided as an example. In practice, a semiconductor device including additional structures and/or layers, fewer structures and/or layers, different structures and/or layers, or differently arranged structures and/or layers than those shown in  FIGS. 2A-2E  may be processed according to the techniques described above in connection with  FIGS. 2A-2E . 
       FIG. 3  is a diagram of a semiconductor device  300  (e.g., a FinFET) formed based on the example techniques described in connection with  FIGS. 2A-2E . In some implementations, the semiconductor device  300  may include a FinFET structure, such as a 5 nm node, with a cobalt-based contact plug  212  and a tungsten via  216  that interface at a contact plug tungsten via contact  218 . The cobalt-based contact plug  212  may be disposed within a cavity of the semiconductor device  300  on an upper surface (e.g., an outer surface) of a layer of titanium-based material within the cavity. In other words, the layer of titanium-based material may be disposed within the cavity and on a lower surface of the cobalt-based contact plug  212 . 
     In some implementations, the layer of titanium-based material may include one or more sub-layers of titanium-based material. For example, the layer of titanium-based material may include a sublayer of material including titanium and silicon (e.g., TiSi layer  204 ), a sublayer of material including titanium, silicon, and nitrogen (TiSiN layer  206 ), and/or a sublayer of material including titanium and nitrogen (TiN layer  208 ), among other examples. 
     In some implementations, the TiSi layer  204  may have a thickness in a range from approximately 4 nanometers to approximately 8 nanometers. In some implementations, the TiSiN layer  206  may have a thickness in a range from approximately 7 angstroms to approximately 15 angstroms. In some implementations, the TiN layer  208  may have a thickness in a range from approximately 5 angstroms to approximately 15 angstroms. 
     The tungsten via may have a width W 1   302  and a depth D 1   304 . In some implementations, the width W 1   302  may be in a range from approximately 11 nanometers to approximately 17 nanometers. In some implementations, the depth D 1   304  may be in a range from approximately 12 nanometers to approximately 35 nanometers. 
     In some implementations, the cobalt-based contact plug may have a width W 2   306  and a depth D 2   308 . In some implementations, the width W 2   306  may be in a range from approximately 10 nanometers to approximately 20 nanometers. In some implementations, the depth D 2   308  may be in a range from approximately 35 nanometers to approximately 50 nanometers. 
     In some implementations, the semiconductor device  300  may include a substrate  309  (e.g., a silicon-based substrate), one or more source/drains  310  (e.g., source regions and/or drain regions), one or more gates  312 , and/or one or more gate spacers  314 . The gate spacers and/or an insulating cap (e.g., a dielectric material) may electrically insulate the one or more gates  312  from the tungsten via  216  and/or one or more additional contacts of the semiconductor device  300 . Additionally, or alternatively, an interlayer dielectric material may electrically insulate the one or more gates  312  from the tungsten via  216 . 
     As indicated above,  FIG. 3  is provided as an example. Other examples may differ from what is described with regard to  FIG. 3 . 
       FIG. 4  is a diagram of example components of a device  400 . In some implementations, deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or wafer/die transport device  110  may include one or more devices  400  and/or one or more components of device  400 . As shown in  FIG. 4 , device  400  may include a bus  410 , a processor  420 , a memory  430 , a storage component  440 , an input component  450 , an output component  460 , and a communication interface  470 . 
     Bus  410  includes a component that enables wired and/or wireless communication among the components of device  400 . Processor  420  includes a central processing unit, a graphics processing unit, a microprocessor, a controller, a microcontroller, a digital signal processor, a field-programmable gate array, an application-specific integrated circuit, and/or another type of processing component. Processor  420  is implemented in hardware, firmware, or a combination of hardware and software. In some implementations, processor  420  includes one or more processors capable of being programmed to perform a function. Memory  430  includes a random access memory, a read only memory, and/or another type of memory (e.g., a flash memory, a magnetic memory, and/or an optical memory). 
     Storage component  440  stores information and/or software related to the operation of device  400 . For example, storage component  440  may include a hard disk drive, a magnetic disk drive, an optical disk drive, a solid state disk drive, a compact disc, a digital versatile disc, and/or another type of non-transitory computer-readable medium. Input component  450  enables device  400  to receive input, such as user input and/or sensed inputs. For example, input component  450  may include a touch screen, a keyboard, a keypad, a mouse, a button, a microphone, a switch, a sensor, a global positioning system component, an accelerometer, a gyroscope, an actuator, and/or the like. Output component  460  enables device  400  to provide output, such as via a display, a speaker, and/or one or more light-emitting diodes. Communication interface  470  enables device  400  to communicate with other devices, such as via a wired connection and/or a wireless connection. For example, communication interface  470  may include a receiver, a transmitter, a transceiver, a modem, a network interface card, an antenna, and/or the like. 
     Device  400  may perform one or more processes described herein. For example, a non-transitory computer-readable medium (e.g., memory  430  and/or storage component  440 ) may store a set of instructions (e.g., one or more instructions, code, software code, program code, and/or the like) for execution by processor  420 . Processor  420  may execute the set of instructions to perform one or more processes described herein. In some implementations, execution of the set of instructions, by one or more processors  420 , causes the one or more processors  420  and/or the device  400  to perform one or more processes described herein. In some implementations, hardwired circuitry may be used instead of or in combination with the instructions to perform one or more processes described herein. Thus, implementations described herein are not limited to any specific combination of hardware circuitry and software. 
     The number and arrangement of components shown in  FIG. 4  are provided as an example. Device  400  may include additional components, fewer components, different components, or differently arranged components than those shown in  FIG. 4 . Additionally, or alternatively, a set of components (e.g., one or more components) of device  400  may perform one or more functions described as being performed by another set of components of device  400 . 
       FIG. 5  is a flowchart of an example process  500  associated with tungsten deposition on a cobalt surface. In some implementations, one or more process blocks of  FIG. 5  may be performed by one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or wafer/die transport device  110 ). Additionally, or alternatively, one or more process blocks of  FIG. 5  may be performed by one or more components of device  400 , such as processor  420 , memory  430 , storage component  440 , input component  450 , output component  460 , and/or communication interface  470 . 
     As shown in  FIG. 5 , process  500  may include depositing cobalt material within a cavity of the semiconductor device (block  510 ). For example, the one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or other the like) may deposit cobalt material  210  within a cavity  202  of the semiconductor device  300 , as described above. 
     As further shown in  FIG. 5 , process  500  may include polishing an upper surface of the cobalt material (block  520 ). For example, the one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or other the like) may polish an upper surface of the cobalt material  210 , as described above. 
     As further shown in  FIG. 5 , process  500  may include performing a hydrogen soak on the semiconductor device (block  530 ). For example, the one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or other the like) may perform a hydrogen soak (e.g., as shown by  FIG. 2D ) on the semiconductor device  300 , as described above. 
     As further shown in  FIG. 5 , process  500  may include depositing tungsten material onto the upper surface of the cobalt material (block  540 ). For example, the one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or other the like) may deposit tungsten material  216  onto the upper surface of the cobalt material  210  after performing the hydrogen soak on the semiconductor device  300 , as described above. 
     Process  500  may include additional implementations, such as any single implementation or any combination of implementations described below and/or in connection with one or more other processes described elsewhere herein. 
     In a first implementation, performing the hydrogen soak comprises applying, before depositing the tungsten material, hydrogen gas to the semiconductor device. 
     In a second implementation, alone or in combination with the first implementation, applying the hydrogen gas to the semiconductor device comprises applying the hydrogen gas for at least 180 seconds. 
     In a third implementation, alone or in combination with one or more of the first and second implementations, after performing the hydrogen soak, greater than 50% of the cobalt material is in a hexagonal close-packed phase. 
     In a fourth implementation, alone or in combination with one or more of the first through third implementations, at least about 55% of the cobalt material is in the hexagonal close-packed phase. 
     In a fifth implementation, alone or in combination with one or more of the first through fourth implementations, a resistivity between the cobalt material and the tungsten material is less than about 400 ohms. 
     In a sixth implementation, alone or in combination with one or more of the first through fifth implementations, process  500  includes depositing, before depositing the cobalt material within the cavity, a titanium-based material within the cavity, wherein the titanium-based material adheres the cobalt material within the cavity. 
     In a seventh implementation, alone or in combination with one or more of the first through sixth implementations, the hydrogen soak prevents or reduces nitrogen bonding to the upper surface of the cobalt material before deposition of the tungsten material. 
     In an eighth implementation, alone or in combination with one or more of the first through seventh implementations, the hydrogen soak removes one or more of oxygen or nitrogen molecules from the upper surface of the cobalt material. 
     Although  FIG. 5  shows example blocks of process  500 , in some implementations, process  500  may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in  FIG. 5 . Additionally, or alternatively, two or more of the blocks of process  500  may be performed in parallel. 
       FIG. 6  is a flowchart of an example process  600  associated with tungsten deposition on a cobalt surface. In some implementations, one or more process blocks of  FIG. 6  may be performed by one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or wafer/die transport device  110 ). Additionally, or alternatively, one or more process blocks of  FIG. 6  may be performed by one or more components of device  400 , such as processor  420 , memory  430 , storage component  440 , input component  450 , output component  460 , and/or communication interface  470 . 
     As shown in  FIG. 6 , process  600  may include depositing cobalt material within a cavity of the semiconductor device (block  610 ). For example, the one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or other the like) may deposit cobalt material  210  within a cavity  202  of the semiconductor device  300 , as described above. 
     As further shown in  FIG. 6 , process  600  may include performing a hydrogen soak on the semiconductor device, wherein, after performing the hydrogen soak, greater than 50% of the cobalt material is in a hexagonal close-packed phase (block  620 ). For example, the one or more semiconductor processing tools may perform a hydrogen soak (as shown in  FIG. 2D ) on the semiconductor device  300 , wherein, after performing the hydrogen soak, greater than 50% of the cobalt material is in a hexagonal close-packed phase, as described above. 
     As further shown in  FIG. 6 , process  600  may include depositing tungsten material onto an upper surface of the cobalt material (block  630 ). For example, the one or more semiconductor processing tools (e.g., deposition tool  102 , soaking tool  104 , CMP tool  106 , etching tool  108 , and/or other the like) may deposit tungsten material  216  onto an upper surface of the cobalt material  210  after performing the hydrogen soak on the semiconductor device  300 , as described above. 
     Process  600  may include additional implementations, such as any single implementation or any combination of implementations described below and/or in connection with one or more other processes described elsewhere herein. 
     In a first implementation, performing the hydrogen soak comprises applying, before depositing the tungsten material, hydrogen gas to the semiconductor device. 
     In a second implementation, alone or in combination with the first implementation, applying the hydrogen gas to the semiconductor device comprises applying the hydrogen gas for at least about 180 seconds. 
     In a third implementation, alone or in combination with one or more of the first and second implementations, a resistivity between the cobalt material and the tungsten material is less than about 200 ohms. 
     In a fourth implementation, alone or in combination with one or more of the first through third implementations, process  600  includes performing, before performing the hydrogen soak, a chemical-mechanical polishing process on the cobalt material. 
     Although  FIG. 6  shows example blocks of process  600 , in some implementations, process  600  may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in  FIG. 6 . Additionally, or alternatively, two or more of the blocks of process  600  may be performed in parallel. 
     Based on performing the hydrogen soak before depositing the tungsten via, a resistivity between cobalt material (e.g., a cobalt-based contact plug) and tungsten material (e.g., a tungsten via) may be reduced, which may reduce an amount of a voltage drop across the tungsten via  216  and the cobalt-based contact plug  212  and/or reduce an amount of power consumed when operating the semiconductor device. 
     As described in greater detail above, some implementations described herein provide a semiconductor device and one or more methods for forming a tungsten via of a semiconductor device by depositing tungsten material on a cobalt surface after performing a hydrogen soak. 
     In some implementations, a method of forming a tungsten via of a semiconductor device includes depositing cobalt material within a cavity of the semiconductor device and polishing an upper surface of the cobalt material. The method further includes performing a hydrogen soak on the semiconductor device before depositing tungsten material onto the upper surface of the cobalt material. 
     In some implementations, a method of forming a tungsten via of a semiconductor device includes depositing cobalt material within a cavity of the semiconductor device. The method additionally includes performing a hydrogen soak on the semiconductor device such that, after performing the hydrogen soak, greater than 50% of the cobalt material is in a hexagonal close-packed phase. The method further includes depositing tungsten material onto an upper surface of the cobalt material. 
     In some implementations, a semiconductor device includes a cobalt-based contact plug within a cavity of the semiconductor device. Greater than 50% of cobalt material of the cobalt-based contact plug is in a hexagonal closed-packed phase. The semiconductor device also includes a tungsten via disposed on an upper surface of the cobalt-based contact plug. The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.