GAS EXHAUST FRAMES INCLUDING PATHWAYS HAVING SIZE VARIATIONS, AND RELATED APPARATUS AND METHODS

Embodiments of the present disclosure relate to gas exhaust frames including pathways having size variations, for use in a substrate processing chamber, and related apparatus and methods. In one or more embodiments, a processing chamber includes a chamber body, and a window. The processing chamber includes one or more heat sources, a substrate support, a liner, and a pre-heat ring. The processing chamber includes one or more gas inlets, and a first set of exhaust pathways positioned on a first side of a reference plane. The first set of exhaust pathways have a first cross-sectional area gradient that increases along a first direction. The processing chamber includes a second set of exhaust pathways positioned on a second side of the reference plane. The second set of exhaust pathways have a second cross-sectional area gradient that increases along a second direction that is opposite of the first direction.

BACKGROUND

Field

Embodiments of the present disclosure relate to gas exhaust frames including pathways having size variations, for use in a substrate processing chamber, and related apparatus and methods.

Description of the Related Art

Continuous reduction in size of semiconductor devices is dependent upon more precise control of, for instance, the flow and temperature of process gases delivered to a semiconductor process chamber. Oftentimes, in a cross-flow chamber, a process gas may be delivered to the chamber and directed across the surface of a substrate to be processed. The deposition uniformity on the substrate may be affected by, for example, gas flow rates.

For example, the non-uniformity in gas flow rates can involve a plume-shaped profile of gas concentrations. Additionally, modularity of adjusting process parameters can be limited, which can hinder deposition uniformity (such as center-to-edge uniformity).

Therefore, a need exists for improved processing chambers that facilitate deposition uniformity, and methods of using the same.

SUMMARY

Embodiments of the present disclosure relate to gas exhaust frames including pathways having size variations, for use in a substrate processing chamber, and related apparatus and methods.

In one or more embodiments, a processing chamber applicable for use in semiconductor manufacturing includes a chamber body, and a window, the chamber body and the window at least partially defining a processing volume. The processing chamber includes one or more heat sources configured to heat the processing volume, a substrate support disposed in the processing volume, a liner at least partially lining the chamber body, and a pre-heat ring disposed in the processing volume and at least partially supported by the liner. The processing chamber includes one or more gas inlets, and a first set of exhaust pathways positioned opposite of the one or more gas inlets on a first side of a reference plane. The first set of exhaust pathways have a first cross-sectional area gradient that increases along a first direction. The processing chamber includes a second set of exhaust pathways positioned opposite of the one or more gas inlets on a second side of the reference plane. The second set of exhaust pathways have a second cross-sectional area gradient that increases along a second direction that is opposite of the first direction.

In one or more embodiments, a gas exhaust frame for insertion in a processing chamber applicable for use in semiconductor manufacturing. The gas exhaust frame includes a first outer face, a second outer face, and a third outer face. The second outer face and the third outer face extend relative to the first outer face along a length, and the gas exhaust frame has a height between the second outer face and the third outer face. The gas exhaust frame includes a plurality of exhaust pathways having a size variation such that at least part of each exhaust pathway of the plurality of exhaust pathways is different in size than each of the other exhaust pathways of the plurality of exhaust pathways.

In one or more embodiments, a method of altering a processing chamber applicable for use in semiconductor processing includes positioning a liner in a processing volume, the liner including an opening. The method includes positioning one or more gas exhaust frames at least partially in the opening of the liner. The one or more gas exhaust frames include a first set of exhaust pathways positioned on a first side of a reference plane, the first set of exhaust pathways having a first cross-sectional area gradient that increases along a first direction. The one or more gas exhaust frames include a second set of exhaust pathways positioned on a second side of the reference plane, the second set of exhaust pathways having a second cross-sectional area gradient that increases along a second direction that is opposite of the first direction. The method includes fluidly connecting the one or more exhaust frames to an exhaust assembly.

DETAILED DESCRIPTION

Embodiments of the present disclosure relate to gas exhaust frames including pathways having size variations, for use in a substrate processing chamber, and related apparatus and methods. The size variations facilitate modularity in adjusting gas parameters (such as zones of flow rate, zones of pressure, and/or zones of temperature) to facilitate enhanced deposition uniformity (such as center-to-edge uniformity).

FIG.1is a schematic side cross-sectional view of a processing chamber100, according to one or more embodiments. The processing chamber100is a deposition chamber. In one or more embodiments, the processing chamber100is an epitaxial deposition chamber. The processing chamber100is utilized to grow an epitaxial film on a substrate102. The processing chamber100creates a cross-flow of precursors across a top surface150of the substrate102.

The processing chamber100includes an upper body156, a lower body148disposed below the upper body156, and a flow module112disposed between the upper body156and the lower body148. The upper body156, the flow module112, and the lower body148form at least part of a chamber body. Disposed within the chamber body is a substrate support106, an upper window108(such as an upper dome), a lower window110(such as a lower dome), a plurality of upper heat sources141, and a plurality of lower heat sources143. As shown, a controller195is in communication with the processing chamber100and is used to control processes and methods, such as at least part of the operations of the methods described herein.

The substrate support106is disposed between the upper window108and the lower window110. The substrate support106includes a support face123that supports the substrate102. The plurality of upper heat sources141are disposed between the upper window and a lid154. The plurality of upper heat sources141form a portion of the upper lamp module155. The lid154may include a plurality of sensors disposed therein or thereon for measuring the temperature within the processing chamber100. The plurality of lower heat sources143are disposed between the lower window110and a floor152. The plurality of lower heat sources143form a portion of a lower lamp module145. The upper window108and the lower window110are formed of an energy transmissive material, such as quartz.

A process volume136and a purge volume138are formed between the upper window108and the lower window110. The process volume136and the purge volume138are part of an internal volume defined at least partially by the upper window108, the lower window110, an upper liner122, and a lower liner109.

The internal volume has the substrate support106disposed therein. The substrate support106includes a top surface on which the substrate102is disposed. The substrate support106is attached to a shaft118. The shaft118is connected to a motion assembly121. The motion assembly121includes one or more actuators and/or adjustment devices that provide movement and/or adjustment for the shaft118and/or the substrate support106within the processing volume136.

The substrate support106may include lift pin holes107disposed therein. The lift pin holes107are sized to accommodate lift pins132for lowering and lifting of the substrate102to and from the substrate support106before or and a deposition process is performed. The lift pins132may rest on lift pin stops134when the substrate support106is lowered from a process position to a transfer position. The lift pin stops134can be coupled to a second shaft104through a plurality of arms.

The flow module112includes one or more gas inlets114(a plurality is shown), a plurality of purge gas inlets164, and one or more gas exhaust outlets116. In one or more embodiments, the plurality of gas inlets114and the plurality of purge gas inlets164are disposed on the opposite side of the flow module112from the one or more gas exhaust outlets116. The upper liner122and the lower liner109are disposed on an inner surface of the flow module112and protect the flow module112from reactive gases used during deposition operations and/or cleaning operations. The gas inlet(s)114and the purge gas inlet(s)164are each positioned to flow a gas parallel to the top surface150of a substrate102disposed within the process volume136. The gas inlet(s)114are fluidly connected to one or more process gas sources151and one or more cleaning gas sources153. The purge gas inlet(s)164are fluidly connected to one or more purge gas sources162. The one or more gas exhaust outlets116are fluidly connected to an exhaust pump157. One or more process gases supplied using the one or more process gas sources151can include one or more reactive gases (such as one or more of silicon (Si), phosphorus (P), and/or germanium (Ge)) and/or one or more carrier gases (such as one or more of nitrogen (N2) and/or hydrogen (H2)). One or more purge gases supplied using the one or more purge gas sources162can include one or more inert gases (such as one or more of argon (Ar), helium (He), hydrogen (H2), and/or nitrogen (N2)). One or more cleaning gases supplied using the one or more cleaning gas sources153can include one or more of hydrogen (H) and/or chlorine (CI). In one or more embodiments, the one or more process gases include silicon phosphide (SiP) and/or phospine (PH3), and the one or more cleaning gases include hydrochloric acid (HCl).

The one or more gas exhaust outlets116are further connected to or include an exhaust system178. The exhaust system178fluidly connects the one or more gas exhaust outlets116and the exhaust pump157. The exhaust system178can assist in the controlled deposition of a layer on the substrate102. In one or more embodiments, the exhaust system178is disposed on an opposite side of the processing chamber100relative to the gas inlet(s)114and/or the purge gas inlets164. The exhaust system178includes a pair of gas boxes179and a common gas box180.

A pre-heat ring200is disposed outwardly of the substrate support106. The pre-heat ring200is supported on a ledge of the lower liner109. The pre-heat ring200is described further inFIGS.2-10. In one or more embodiments, the pre-heat ring200and/or the liners109and/or122are formed of one or more of quartz (such as transparent quartz, e.g. clear quartz; opaque quartz, e.g., white or grey quartz; and/or black quartz), silicon carbide (SiC), and/or graphite coated with SiC.

One or more process gases P1flow from the gas inlet(s)114, into the processing volume136, and over the substrate102to form (e.g., epitaxially grow) one or more layers on the substrate102while the heat sources141,143heat the pre-heat ring200and the substrate102. After flowing over the substrate102, the one or more process gases P1flow out of the internal volume through the one or more gas exhaust outlets116. The flow module112can be at least part of a sidewall of the processing chamber100. The present disclosure also contemplates that one or more purge gases can be supplied to the purge volume138(through the plurality of purge gas inlets164) during the deposition operation, and exhausted from the purge volume138.

The lower liner109includes an opening190(such as an upper recess), and a pair of gas exhaust frames600A,600B (a first gas exhaust frame600A is shown inFIG.1) are positioned at least partially in the opening190. The gas exhaust frames600A,600B are further described in relation toFIG.5below.

As shown, a controller195is in communication with the processing chamber100and is used to control processes and methods, such as at least some of the operations of the methods described herein.

The controller195is configured to receive data or input as sensor readings from a plurality of sensors. The sensors can include, for example: sensors that monitor growth of layer(s) on the substrate102; sensors that monitor growth or residue on inner surfaces of chamber components of the processing chamber100(such as inner surfaces of the upper window108and/or the liners109,122); sensors that monitor gas flow of the one or more process gases P1; and/or sensors that monitor temperatures of the substrate102, the substrate support106, the upper window108, and/or the liners109,122. The controller195is equipped with or in communication with a system model of the processing chamber100. The system model includes a heating model, a deposition model, a coating model, a rotational position model, and/or a gas flow model. The system model is a program configured to estimate parameters (such as a gas flow rate, a center-to-edge uniformity profile, a gas pressure, a processing temperature, a rotational position of component(s), a heating profile, a coating condition, and/or a cleaning condition) within the processing chamber100throughout a deposition operation and/or a cleaning operation. The controller195is further configured to store readings and calculations. The readings and calculations include previous sensor readings, such as any previous sensor readings within the processing chamber100. The readings and calculations further include the stored calculated values from after the sensor readings are measured by the controller195and run through the system model. Therefore, the controller195is configured to both retrieve stored readings and calculations as well as save readings and calculations for future use. Maintaining previous readings and calculations enables the controller195to adjust the system model over time to reflect a more accurate version of the processing chamber100.

The controller195can monitor, estimate an optimized parameter, adjust a size of a cross-sectional area of an exhaust pathway of the gas exhaust frames600A,600B, detect a coating condition for the upper window108, generate an alert on a display, halt a deposition operation, initiate a chamber downtime period, delay a subsequent iteration of the deposition operation, initiate a cleaning operation, detect a cleaning condition for the upper window108, halt the cleaning operation, adjust a heating power, and/or otherwise adjust the process recipe.

The controller195includes a central processing unit (CPU)198(e.g., a processor), a memory196containing instructions, and support circuits197for the CPU198. The controller195controls various items directly, or via other computers and/or controllers. In one or more embodiments, the controller195is communicatively coupled to dedicated controllers, and the controller195functions as a central controller.

The controller195is of any form of a general-purpose computer processor that is used in an industrial setting for controlling various substrate processing chambers and equipment, and sub-processors thereon or therein. The memory196, or non-transitory computer readable medium, is one or more of a readily available memory such as random access memory (RAM), dynamic random access memory (DRAM), static RAM (SRAM), and synchronous dynamic RAM (SDRAM (e.g., DDR1, DDR2, DDR3, DDR3L, LPDDR3, DDR4, LPDDR4, and the like)), read only memory (ROM), floppy disk, hard disk, flash drive, or any other form of digital storage, local or remote. The support circuits197of the controller195are coupled to the CPU198for supporting the CPU198. The support circuits197include cache, power supplies, clock circuits, input/output circuitry and subsystems, and the like. Operational parameters (e.g., a center-to-edge profile, the coating condition, a pressure for process gases P1, a processing temperature, a heating profile, a flow rate for process gases P1, a pressure for cleaning gases, a flow rate for cleaning gases, and/or a rotational position of the substrate support106) and operations are stored in the memory196as a software routine that is executed or invoked to turn the controller195into a specific purpose controller to control the operations of the various chambers/modules described herein. The controller195is configured to conduct any of the operations described herein. The instructions stored on the memory, when executed, cause one or more of operations of method2000(described below) to be conducted in relation to the processing chamber100. The controller195and the processing chamber100are at least part of a system for processing substrates.

The various operations described herein (such as the operations—for example operation2016—of the method2000) can be conducted automatically using the controller195, or can be conducted automatically or manually with certain operations conducted by a user.

In one or more embodiments, the controller195includes a mass storage device, an input control unit, and a display unit. The controller195monitors the temperature of the substrate102, the temperature of the substrate support106, the temperature of the upper window108, the process gas flow, and/or the purge gas flow. In one or more embodiments, the controller195includes multiple controllers195, such that the stored readings and calculations and the system model are stored within a separate controller from the controller195which controls the operations of the processing chamber100. In one or more embodiments, all of the system model and the stored readings and calculations are saved within the controller195.

The controller195is configured to control the sensor devices, the deposition, the cleaning, the rotational position, the heating, and gas flow through the processing chamber100by providing an output to the controls for the heat sources, the gas flow, and the motion assembly121. The controls include controls for the sensor devices, the upper heat sources141, the lower heat sources143, the process gas source151, the purge gas source162, the motion assembly121, and the exhaust pump157.

The controller195is configured to adjust the output to the controls based on the sensor readings, the system model, and the stored readings and calculations. The controller195includes embedded software and a compensation algorithm to calibrate measurements. The controller195can include one or more machine learning algorithms and/or artificial intelligence algorithms that estimate optimized parameters for the deposition operations and/or the cleaning operations (such as for adjusting a deposition operation (e.g. the process recipe), halting the deposition operation, initiating a chamber downtime period, delaying a subsequent iteration of the deposition operation, initiating a cleaning operation, halting the cleaning operation, adjusting a heating power, and/or adjusting the cleaning operation). The optimized parameter can include, for example, a center-to-edge profile for the substrate102(which facilitates uniformity) with respect to temperature, gas flow rate, substrate position, and/or deposition thickness.

The one or more machine learning algorithms and/or artificial intelligence algorithms may implement, adjust and/or refine one or more algorithms, inputs, outputs or variables described above. Additionally or alternatively, the one or more machine learning algorithms and/or artificial intelligence algorithms may rank or prioritize certain aspects of adjustments of the process chamber100and/or the method2000relative to other aspects of the process chamber100and/or the method2000. The one or more machine learning algorithms and/or artificial intelligence algorithms may account for other changes within the processing systems such as hardware replacement and/or degradation. In one or more embodiments, the one or more machine learning algorithms and/or artificial intelligence algorithms account for upstream or downstream changes that may occur in the processing system due to variable changes of the process chamber100and/or the method2000. For example, if variable “A” is adjusted to cause a change in aspect “B” of the process, and such an adjustment unintentionally causes a change in aspect “C” of the process, then the one or more machine learning algorithms and/or artificial intelligence algorithms may take such a change of aspect “C” into account. In such an embodiment, the one or more machine learning algorithms and/or artificial intelligence algorithms embody predictive aspects related to implementing the process chamber100and/or the method2000. The predictive aspects can be utilized to preemptively mitigate unintended changes within a processing system.

The one or more machine learning algorithms and/or artificial intelligence algorithms can use, for example, a regression model (such as a linear regression model) or a clustering technique to estimate optimized parameters. The algorithm can be unsupervised or supervised. The one or more machine learning algorithms and/or artificial intelligence algorithms can optimize, for example, a heating power applied to the heat sources141,143and/or one or more sizes of one or more cross-sectional areas of one or more exhaust pathways of the gas exhaust frames600A,600B. The one or more machine learning algorithms and/or artificial intelligence algorithms can optimize, for example, a size and/or a gas conductance of at least one exhaust pathway (such as all of the exhaust pathways) of the gas exhaust frames600A,600B.

The one or more machine learning algorithms and/or artificial intelligence algorithms can optimize, for example, a center-to-edge gas concentration profile across a substrate102during deposition operations. The center-to-edge gas concentration profile can be pre-generated using simulation operations, and the one or more machine learning algorithms and/or artificial intelligence algorithms can use real-time collected data to adjust the center-to-edge gas concentration profile. The center-to-edge concentration profile is affected, for example, by the sizes of the exhaust pathways.

In one or more embodiments, the controller195automatically conducts one or more operations described herein without the use of one or more machine learning algorithms or artificial intelligence algorithms. In one or more embodiments, the controller195compares measurements (such as of gas flow rate(s)) and/or deposition thickness to data in a look-up table and/or a library to determine if adjustment(s) can be used to facilitate a center-to-edge profile. The controller195can stored measurements as data in the look-up table and/or the library.

FIG.2is a schematic top view of the processing chamber100shown inFIG.1, according to one or more embodiments.

The processing chamber100includes a gas inject assembly185. In one or more embodiments, a side gas inject assembly189can inject the one or more process gases P1in a cross-flow manner, in addition to the primary flow of the one or more process gases P1.

FIG.3is a schematic axonometric view of a pair of gas exhaust frames400A,400B, according to one or more embodiments.

FIG.4is a schematic top view of the pair of gas exhaust frames400A,400B shown inFIG.3, according to one or more embodiments.

Each of the pair of gas exhaust frames400A,400B includes a plurality of exhaust pathways411A-415A,411B-415B. For each of the pair of gas exhaust frames400A,400B, the respective plurality of exhaust pathways411A-415A,411B-415B are substantially equal in size to each other.

FIG.5is a schematic axonometric view of a pair of gas exhaust frames600A,600B, according to one or more embodiments.

FIG.6is a schematic top view of the pair of gas exhaust frames600A,600B shown inFIG.5, according to one or more embodiments.

Each gas exhaust frame600A,600B a first outer face621A,621B, a second outer face622A,622B, and a third outer face623A,623B. The second outer face622A,622B and the third outer face623A,623B extend relative to the first outer face621A,621B along a length L1. Each gas exhaust frame600A,600B has a height H1between the second outer face622A,622B and the third outer face623A,623B. Each gas exhaust frame600A,600B has a width W1that is larger than the length L1and the height H1. Each of the pair of gas exhaust frames600A,600B includes a plurality of exhaust pathways611A-615A,611B-615B. For each of the pair of gas exhaust frames600A,600B, the respective plurality of exhaust pathways611A-615A,611B-615B have a size variation such that at least part of each exhaust pathway of the respective plurality of exhaust pathways611A-615A,611B-615B is different in size than each of the other exhaust pathways of the plurality of exhaust pathways611A-615A,611B-615B. In one or more embodiments, one or more of the exhaust pathways611A-615A,611B-615B are equal in size to each other. The first outer face621A,621B is arcuate. In one or more embodiments, the size variation is a size gradient. In one or more embodiments, the size gradient is a cross-sectional area gradient. In one or more embodiments, the cross-sectional area gradient is for the cross-sectional areas shown inFIG.6of the plurality of exhaust pathways611A-615A,611B-615B.

A first set of exhaust pathways611A-615A are positioned on a first side of a reference plane RP1. A second set of exhaust pathways611B-615B are positioned on a second side of the reference plane RP1, the second set of exhaust pathways having a second cross-sectional area gradient that increases along a second direction that is opposite of the first direction. When the first and second gas exhaust frames600A,600B are positioned in the opening190of the lower liner109, the first set of exhaust pathways611A-615A and the second set of exhaust pathways611B-615B are positioned opposite of the one or more gas inlets114(shown inFIG.1).

For a first gas exhaust frame600A, the cross-sectional area gradient (e.g., a first cross-sectional area gradient for the first set of exhaust pathways611A-615A) increases along a first direction D1(e.g., an arcuate direction) parallel to the first outer face621A of the first gas exhaust frame600A. For a second gas exhaust frame600B, the cross-sectional area gradient (e.g., a second cross-sectional area gradient for the second set of exhaust pathways611B-615B) increases along a second direction D2(e.g., an arcuate direction) parallel to the first outer face621B of the second gas exhaust frame600B. The second direction D2is opposite of the first direction D1.

Each gas exhaust frame600A,600B includes an arcuate bar625A,625B and a plurality of legs631A-636A,631B-636B extending relative to the respective arcuate bar625A,625B. The respective plurality of legs631A-636A,631B-636B bound the respective plurality of exhaust pathways611A-615A,611B-615B. As shown inFIG.1, the plurality of legs631A-636A,631B-636B abut against inner surface(s) of the upper liner122when positioned in the processing chamber100, and the one or more process gases P1flow vertically through the exhaust pathways611A-615A,611B-615B when exhausted from the process volume136. The respective plurality of exhaust pathways611A-615A,611B-615B include a plurality of opening sections extending into the second outer face622A,622B, and extending from the second outer face622A,622B and to the third outer face623A,623B. The plurality of opening sections include the cross-sectional area gradient along the respective first direction D1or second direction D2. The plurality of opening sections of the first set of exhaust pathways611A-615A and the plurality of opening sections of the second set of exhaust pathways611B-615B are aligned above the pre-heat ring200(as shown inFIG.1).

A first end exhaust pathway611A,611B that is nearest to a first end616A,616B of the respective gas exhaust frame600A,600B has a first cross-sectional area (in the view shown inFIG.6), and a second end exhaust pathway615A,615B that is nearest to a second end617A,617B of the respective gas exhaust frame600A,600B has a second cross-sectional area (in the view shown inFIG.6) that is larger than the first cross-sectional area by a ratio of the first cross-sectional area. In one or more embodiments, the ratio is 0.2 or greater, such as within a range of 0.2 to 0.3. In one or more embodiments, the ratio is about 0.25. For each of the first gas exhaust frame600A and the second gas exhaust frame600B, the cross-sectional area gradient increases (respectively in the direction D1and the direction D2) by a step S1between the respective plurality of exhaust pathways611A-615A,6111B-615B. In one or more embodiments, the step S1is within a range of 4.6% (0.046) to 6.8% (0.068). In one or more embodiments, the step S1is within a range of 5.7% (0.057) to 5.8% (0.058), such as about 5.74% (0.0574).

The first end exhaust pathways611A,611B are respective outward exhaust pathways that are farthest from the reference plane RP1for each set of exhaust pathways611A-615A,611B-615B. The second end exhaust pathways615A,615B are respective inward exhaust pathways that are nearest to the reference plane RP1for each set of exhaust pathways611A-615A,611B-615B.

FIG.7is a schematic axonometric view of a pair of gas exhaust frames800A,800B, according to one or more embodiments.

FIG.8is a schematic top view of the pair of gas exhaust frames800A,800B shown inFIG.7, according to one or more embodiments.

Each of the pair of gas exhaust frames800A,800B includes a plurality of exhaust pathways811A-815A,811B-815B. A first end exhaust pathway811A,811B that is nearest to the first end616A,616B of the respective gas exhaust frame800A,800B has a first cross-sectional area (in the view shown inFIG.8), and a second end exhaust pathway815A,815B that is nearest to the second end617A,617B of the respective gas exhaust frame800A,800B has a second cross-sectional area (in the view shown inFIG.8) that is larger than the first cross-sectional area by a second ratio of the first cross-sectional area. In one or more embodiments, the second ratio is 0.5 or greater, such as 0.7 or greater, for example 0.75 or greater. In one or more embodiments, the second ratio is within a range of 0.7 to 0.8, such as about 0.75. For each of the first gas exhaust frame800A and the second gas exhaust frame800B, the cross-sectional area gradient increases by a second step S2between the respective plurality of exhaust pathways811A-815A,811B-815B. In one or more embodiments, the second step S2is within a range of 10.5% (0.105) to 16% (0.16). In one or more embodiments, the second step S2is within a range of 14% (0.14) to 16% (0.16), such as about 15% (0.15).

FIG.9is a schematic axonometric view of a pair of gas exhaust frames1000A,1000B, according to one or more embodiments.

FIG.10is a schematic top view of the pair of gas exhaust frames1000A,1000B shown inFIG.9, according to one or more embodiments.

Each of the pair of gas exhaust frames1000A,1000B includes a plurality of exhaust pathways1011A-1015A,1011B-1015B. A first end exhaust pathway1015A,1015B that is nearest to the second end617A,617B of the respective gas exhaust frame1000A,1000B has a first cross-sectional area (in the view shown inFIG.10), and a second end exhaust pathway1011A,1011B that is nearest to the first end616A,616B of the respective gas exhaust frame1000A,1000B has a second cross-sectional area (in the view shown inFIG.10) that is larger than the first cross-sectional area by the ratio described above in relation toFIG.6.

For a first gas exhaust frame1000A, the cross-sectional area gradient increases along a first direction D3(e.g., an arcuate direction) parallel to the first outer face621A of the first gas exhaust frame1000A. For a second gas exhaust frame1000B, the cross-sectional area gradient increases along a second direction D4(e.g., an arcuate direction) parallel to the first outer face621B of the second gas exhaust frame1000B. The second direction D4is opposite of the first direction D3. For each of the first gas exhaust frame1000A and the second gas exhaust frame1000B, the cross-sectional area gradient increases (respectively in the first direction D3and the second direction D4) by the step S1(described above in relation toFIG.6) between the respective plurality of exhaust pathways1011A-1015A,1011B-1015B.

FIG.11is a schematic axonometric view of a pair of gas exhaust frames1200A,1200B, according to one or more embodiments.

FIG.12is a schematic top view of the pair of gas exhaust frames1200A,1200B shown inFIG.11, according to one or more embodiments.

Each of the pair of gas exhaust frames1200A,1200B includes a plurality of exhaust pathways1211A-1215A,1211B-1215B. A first end exhaust pathway1215A,1215B that is nearest to the second end617A,617B of the respective gas exhaust frame1200A,1200B has a first cross-sectional area (in the view shown inFIG.12), and a second end exhaust pathway1211A,1211B that is nearest to the first end616A,616B of the respective gas exhaust frame1200A,1200B has a second cross-sectional area (in the view shown inFIG.12) that is larger than the first cross-sectional area by the second ratio described above in relation toFIG.8.

For a first gas exhaust frame1200A, the cross-sectional area gradient increases along the first direction D3(e.g., an arcuate direction) parallel to the first outer face621A of the first gas exhaust frame1200A. For a second gas exhaust frame1200B, the cross-sectional area gradient increases along the second direction D4(e.g., an arcuate direction) parallel to the first outer face621B of the second gas exhaust frame1200B. For each of the first gas exhaust frame1200A and the second gas exhaust frame1200B, the cross-sectional area gradient increases (respectively in the first direction D3and the second direction D4) by the second step S2(described above in relation toFIG.8) between the respective plurality of exhaust pathways1211A-1215A,1211B-1215B.

FIG.13is a schematic axonometric view of a pair of gas exhaust frames1400A,1400B, according to one or more embodiments. The gas exhaust frames1400A,1400B can be used at least partially in place of the gas exhaust frames600A,600B shown inFIGS.1and5.

FIG.14is a schematic front view of the pair of gas exhaust frames1400A,1400B shown inFIG.13, according to one or more embodiments.

A first gas exhaust frame1400A includes a first set of exhaust pathways1411A-1415A. The first set of exhaust pathways1411A-1415A include a plurality of opening sections1431A-1435A extending into a first outer face1421A of the first gas exhaust frame1400A, and from the first outer face1421A and to a second outer face1424A of the first gas exhaust frame1400A. The plurality of opening sections1431A-1435A of the first set include the first cross-sectional area gradient increasing in the first direction D1.

A second gas exhaust frame1400B includes a second set of exhaust pathways1411B-1415B. The second set of exhaust pathways1411B-1415B include a plurality of opening sections1431B-1435B extending into a first outer face1421B of the second gas exhaust frame1400B. The plurality of opening sections1431B-1435B of the second set include the second cross-sectional area gradient increasing in the second direction D2.

In one or more embodiments (as shown inFIGS.13and14), the first cross-sectional area gradient and/or the second cross-sectional area gradient include the ratio and/or the first step S1(described in relation toFIG.6). The present disclosure contemplates that the first cross-sectional area gradient and/or the second cross-sectional area gradient can include the second ratio and/or the second step S2(described in relation toFIG.8).

The gas exhaust frames1400A,1400B can be inserted through one or more sidewalls of the processing chamber100, and can extend at least partially into the opening190of the lower liner109.

FIG.15is a schematic axonometric view of the pair of gas exhaust frames1400A,1400B shown inFIGS.13and14, according to one or more embodiments. The gas exhaust frames1400A,1400B can be used at least partially in place of the gas exhaust frames600A,600B shown inFIGS.1and5.

FIG.16is a schematic front view of the pair of gas exhaust frames1400A,1400B shown inFIG.15, according to one or more embodiments.

In the implementation shown inFIGS.15and16, the plurality of opening sections1431A-1435A of the first set include the first cross-sectional area gradient increasing in the first direction D3, and the plurality of opening sections1431B-1435B of the second set include the second cross-sectional area gradient increasing in the second direction D4.

FIG.17is a schematic axonometric view of a pair of gas exhaust frames1800A,1800B, according to one or more embodiments. The gas exhaust frames1800A,1800B can be used at least partially in place of the gas exhaust frames600A,600B shown inFIGS.1and5.

FIG.18is a schematic front view of the pair of gas exhaust frames1800A,1800B shown inFIG.17, according to one or more embodiments.

A first gas exhaust frame1800A includes a first set of exhaust pathways1811A-1815A. The first set of exhaust pathways1811A-1815A include a plurality of first opening sections1831A-1835A extending into the first outer face1421A of the first gas exhaust frame1800A, and a plurality of second opening sections1841A-1845A intersecting the plurality of first opening sections1831A-1835A at an angle. In one or more embodiments, the plurality of second opening sections1841A-1845A include the first cross-sectional area gradient that increases in the first direction D1(e.g., toward the reference plane RP1). The present disclosure contemplates that the first cross-sectional area gradient can increase in the first direction D3(e.g., away from the reference plane RP1). A first opening section1835A and a second opening section1845A are shown in ghost forFIG.17for an end exhaust gas pathway1815A of the first gas exhaust frame1800A.

A second gas exhaust frame1800B includes a second set of exhaust pathways1811B-1815B. The second set of exhaust pathways1811B-1815B include a plurality of first opening sections1831B-1835B extending into the first outer face1421B of the second gas exhaust frame1800B. The plurality of first opening sections1831B-1835B of the second set include the second cross-sectional area gradient increasing in the second direction D2(e.g., toward the reference plane RP1). The present disclosure contemplates that the second cross-sectional area gradient can increase in the second direction D4(e.g., away from the reference plane RP1).

In one or more embodiments (as shown inFIGS.17and18), the first cross-sectional area gradient and/or the second cross-sectional area gradient include the ratio and/or the first step S1(described in relation toFIG.6). The present disclosure contemplates that the first cross-sectional area gradient and/or the second cross-sectional area gradient can include the second ratio and/or the second step S2(described in relation toFIG.8).

In one or more embodiments, for each of the pair of gas exhaust frames1800A,1800B, the respective plurality of first opening sections1831A-1835A,1831B-1835B are substantially equal in size (e.g., cross-sectional area size) to each other.

The plurality of first opening sections1831A-1835A,1831B-1835B and the plurality of second opening sections1841A-1845A,1841B-1845B are shown as elongated slots inFIGS.17and18. The present disclosure contemplates that the plurality of first opening sections1831A-1835A,1831B-1835B and/or the plurality of second opening sections1841A-1845A,1841B-1845B can be circular in shape, ovular in shape, and/or rectangular in shape (as shown for the exhaust pathways411A-415A,411B-415B inFIGS.3and4).

The present disclosure contemplates that gas exhaust frames discussed herein (such as the gas exhaust frames1800A,1800B) can be omitted, and the exhaust pathways discussed herein (such as the sets of exhaust pathways1811A-1815A,1811B-1815B) can be formed in one or more components (such as the lower liner109) of the processing chamber100.

The present disclosure contemplates that the gas exhaust frames discussed herein can replace at least part of the gas boxes179shown inFIG.2. For example, ledge sections1861A,1861B of the gas exhaust frames1800A,1800B can at least partially replace vertical sections of the gas boxes179shown inFIG.2.

The present disclosure contemplates that although five exhaust pathways are shown for each gas exhaust frame herein, a different number (e.g., more or less, such as two, three, four, six, or more) exhaust pathways can be used for each gas exhaust frame. The number may depend, for example, on process requirements and/or design constraints.

FIG.19is a schematic flow diagram of a method2000of altering a processing chamber applicable for use in semiconductor processing, according to one or more embodiments.

Operation2002includes positioning a liner in a processing volume. The liner includes an opening.

Operation2004includes positioning and/or adjusting one or more gas exhaust frames at least partially in the opening of the liner. The one or more gas exhaust frames include a first set of exhaust pathways positioned on a first side of a reference plane. The first set of exhaust pathways have a first cross-sectional area gradient that increases along a first direction. The one or more gas exhaust frames include a second set of exhaust pathways positioned on a second side of the reference plane. The second set of exhaust pathways have a second cross-sectional area gradient that increases along a second direction that is opposite of the first direction. In one or more embodiments, the positioning and/or adjusting of the one or more gas exhaust frames adjusts a conductance of gas flow through the liner. In one or more embodiments, the positioning and/or adjusting of the one or more gas exhaust frames adjusts one or more of a flow ratio, a pressure, a temperature, and/or a purge flow of gas(es) through the liner.

Operation2006includes fluidly connecting the one or more exhaust frames to an exhaust assembly. In one or more embodiments, the exhaust assembly includes a plurality of gas boxes and a common exhaust box that includes a common plenum.

Operation2008includes positioning a substrate on a substrate support in the processing volume.

Operation2010includes heating the substrate.

Operation2012includes flowing one or more process gases over the substrate. The process gasses form (e.g., epitaxially) one or more layers on the substrate.

Operation2014includes exhausting the one or more process gases from the chamber. The one or more process gases are exhausted through the first set of exhaust pathways and the second set of exhaust pathways of the one or more gas exhaust frames. The one or more gas exhaust frames are fluidly connected to an exhaust pump.

Optional operation2016includes adjusting a size of a cross-sectional area of one or more of: at least one exhaust passage of the first set of exhaust pathways or at least one exhaust passage of the second set of exhaust pathways. In one or more embodiments, the adjustment of the size is conducted in real-time and in an in-situ manner. For example, a block and/or a plate can be moved (e.g., actuator) in real time to adjust the size of the cross-sectional area. As an example, one or more of blocks671-675shown in ghost inFIG.6can be moved (e.g., outwardly along radial direction RD1) to block or open the respective exhaust pathway611A-615A. The present disclosure contemplates that blocks similar to the blocks671-675can be included for the second set of exhaust pathways611B-615B.

The method2000can be used to retrofit processing chambers. For example, an existing liner can be replaced with the liner referenced in operation2002to alter sizes of exhaust pathways of a processing chamber.

FIG.20is a schematic top view of a substrate102during a deposition operation, according to one or more embodiments.

FIG.21is a schematic top view of a substrate102during a deposition operation, according to one or more embodiments.

InFIG.20, a first boundary2111bounds an area having a first gas flow concentration, and a second boundary2112bounds an area having a second gas flow concentration that is higher than the first gas flow concentration of the first boundary2111.

InFIG.21, a first boundary2211bounds an area having a first gas flow concentration, and a second boundary2212bounds two areas having a second gas flow concentration that is higher than the first gas flow concentration of the first boundary2211. InFIG.21, the first and second cross-sectional area gradients described above are used to exhaust the one or more process gases P1. As shown inFIG.21, a plume shape (e.g., of the first boundary2211) is reduced relative toFIG.20(e.g., of the first boundary2111).

FIG.22is a schematic graphical view of deposition thickness versus substrate radius, according to one or more embodiments.

A first profile2301shows a deposition thickness profile across a surface of a first substrate, and a second profile2302shows a deposition thickness profile across a surface of a second substrate (using the first and second cross-sectional area gradients described above to exhaust the one or more process gases P1). As shown by the second profile2302, the deposition thickness of film epitaxially deposited on the second substrate is higher from a center of the second substrate and to an outer edge of the second substrate.

A third profile2303shows a deposition thickness profile across a surface of a third substrate. As shown by the third profile2303, gas flow over the third substrate is controlled and distributed such that a center-to-edge non-uniformity is reduced (relative to the first and second profiles2301,2302) by reducing thickness near a center of the third substrate and increasing thickness neat an outer edge of the third substrate. Benefits of the present disclosure includes adjustability of processing parameters (such as gas flow rates, processing temperatures, and/or deposition profiles-such as center-to-edge profiles); reduced gas flow non-uniformities; enhanced deposition thicknesses; increased throughput; enhanced center-to-edge deposition uniformities; modularity of adjusting processing parameters; quickly, simply, and cost-effectively adjusting exhaust pathway sizes to adjust processing parameters; and modularity in simply retrofitting a variety of processing chambers that conduct different operations (e.g., different processing operations). By using a variety of configurations for gas exhaust frames, a gas flow boundary shape can be a variety of shapes (e.g., inverted U-shaped, U-shaped, M-shaped, or W shaped) and can facilitate a variety of center-to-edge deposition thickness uniformity profiles.

The present disclosure describes apparatus, systems, and methods used in relation to epitaxial deposition chambers. The present disclosure contemplates that the apparatus, systems, and methods described herein can be used in relation to a variety of other chambers, such as other epitaxial chambers and/or chambers that conduct other processes.

It is contemplated that one or more aspects disclosed herein may be combined. As an example, one or more aspects, features, components, operations and/or properties of the processing chamber100, the controller195, the gas exhaust frames400A,400B, gas exhaust frames600A,600B, gas exhaust frames800A,800B, gas exhaust frames1000A,1000B, gas exhaust frames1200A,1200B, gas exhaust frames1400A,1400B, gas exhaust frames1800A,1800B, and/or the method2000may be combined. Moreover, it is contemplated that one or more aspects disclosed herein may include some or all of the aforementioned benefits.