Classifications

• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D87/00—Integrated devices comprising both bulk components and either SOI or SOS components on the same substrate
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
  • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
  • H01L21/02104—Forming layers
  • H01L21/02365—Forming inorganic semiconducting materials on a substrate
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D30/00—Field-effect transistors [FET]
  • H10D30/60—Insulated-gate field-effect transistors [IGFET]
  • H10D30/62—Fin field-effect transistors [FinFET]
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
  • H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
  • H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
  • H10D62/213—Channel regions of field-effect devices
  • H10D62/221—Channel regions of field-effect devices of FETs
  • H10D62/235—Channel regions of field-effect devices of FETs of IGFETs
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
  • H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
  • H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
  • H10D62/213—Channel regions of field-effect devices
  • H10D62/221—Channel regions of field-effect devices of FETs
  • H10D62/235—Channel regions of field-effect devices of FETs of IGFETs
  • H10D62/292—Non-planar channels of IGFETs
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
  • H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
  • H10D62/83—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
  • H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
  • H10D62/85—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group III-V materials, e.g. GaAs
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
  • H10D84/01—Manufacture or treatment
  • H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
  • H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
  • H10D84/0158—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs the components including FinFETs
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
  • H10D84/01—Manufacture or treatment
  • H10D84/02—Manufacture or treatment characterised by using material-based technologies
  • H10D84/03—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology
  • H10D84/038—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology using silicon technology, e.g. SiGe
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
  • H10D84/01—Manufacture or treatment
  • H10D84/02—Manufacture or treatment characterised by using material-based technologies
  • H10D84/08—Manufacture or treatment characterised by using material-based technologies using combinations of technologies, e.g. using both Si and SiC technologies or using both Si and Group III-V technologies
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
  • H10D86/01—Manufacture or treatment
  • H10D86/011—Manufacture or treatment comprising FinFETs
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
  • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
  • H10D86/201—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates the substrates comprising an insulating layer on a semiconductor body, e.g. SOI
  • H10D86/215—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates the substrates comprising an insulating layer on a semiconductor body, e.g. SOI comprising FinFETs

Definitions

• the present disclosure is directed to a method of forming fins from different materials on a substrate and to a substrate having fins formed from different materials and, more specifically, toward a method of forming fins on multi-layer substrate wherein some of the fins are 'formed from the material of a first layer of the substrate and some of the fins are formed from, a material of a second layer of the substrate arid toward a substrate having such fins.
• FinFET devices include a plurality of fins that may he used to form channels of a fitiFET transistor. It is sometimes desirable to form the fins from different materials. For example, it may be desirable to form some fins from a Group III - Group V material, indium arsenide or indium gallium arsenide, for example, another group of fins from germanium and, optionally, a third group of silicon fins.
• a Group III - Group V material indium arsenide or indium gallium arsenide
• germanium for example, another group of fins from germanium and, optionally, a third group of silicon fins.
• An exemplary embodiment includes a method of forming fins of different materials.
• the method includes providing a substrate comprising a layer of a first material having a top surface, masking a first portion of the substrate to form a mask while leaving a second portion of the substrate exposed, and etching a first opening at the second portion.
• the method also includes fanning a bod of a second material in the opening to a level of the top surface of the layer of the first material, removing the mask and forming fins of the first material at the first portion and forming fins of the second material at the second portion.
• Another embodiment includes a finFEt device having fins formed of at least two different materials. The device comprises a substrate having a first layer having a top surface and a first oxide layer on the first layer top surface.
• the first oxide layer has a top surface, and the first oxide layer covers a first portion of the first layer and does not cover a second portion of the first layer.
• a first body of material is formed at the second portion of the first layer, and the first body of material has a top surface even with the top surface of the first oxide layer.
• a first set of fins is formed of a first material on the first oxide layer, and a second set of fins formed of a second material is formed on the first body of material.
• An additional embodiment includes a method of forming fins of different materials.
• the method includes providing a substrate comprising a layer of a first material, a first oxide layer on the layer of the first material, a layer of a second material on the first oxide layer, and a second oxide layer on the layer of the second material .
• the substrate also includes a layer of a third material on the second oxide layer, and the layer of the third material has a top surface that forms a top surface of the substrate.
• the method also includes etching a first opening at a first location on the substrate through the layer of the third material and through the second oxide layer to the layer of the second material and forming a body of the second material in the first opening to a level of the top surface of the substrate.
• the method also includes etching a second opening at a second location on the substrate through the layer of the third material, the second oxide layer, the layer of the second material and the first oxide layer to the layer of the first material and forming a body of the first material in the second opening to a level of the top surface of the substrate.
• the method includes forming first fins comprising the second material at the first location, forming second fins comprising the first material at the second location and forming third fins comprising the third material at a third location.
• Another embodiment includes a method of forming fins of different materials.
• the method includes steps for providing a substrate comprising a layer of a first material having a top surface, steps for masking a first portion of the substrate to form a mask while leaving a second portion of the substrate exposed, and steps for etching a first opening at the second portion.
• the method also includes steps for forming a body of a second material in the opening to a level of the top surface of the layer of the first material, steps for removing the mask, and steps for forming fins of the first material at the first portion and forming fins of the second material at. the second portion.
• An additional embodiment includes a finFEt device having fins formed of at least two different materials.
• the device comprises a substrate having a first layer having a top surface and a first oxide layer on the first layer top surface, the first oxide layer having a top surface.
• the first oxide layer covers a first portion of the first, layer and does not cover a second portion of the first layer.
• a first body of material is formed at the second portion of the first layer, the first body of material having a top surface even with the top surface of the first oxide layer,
• First fin means for forming a first portion of a semiconductor device are provided, and second fin means for forming a second portion of a semiconductor device are provided.
• Another embodiment includes a method of forming fins of different materials.
• the method includes steps for providing a substrate comprising a layer of a first material, a first oxide layer on the layer of the first material, a layer of a second material on the first oxide layer, a second oxide layer on the layer of the second material and a layer of a third material on the second oxide layer.
• the layer of the third material has a top surface forming a top surface of the substrate.
• the method also includes steps for etching a first opening at a first location on the substrate through the layer of the third material and through the second oxide layer to the layer of the second material and steps for forming a body of the second material in the first opening to a level of the top surface of the substrate.
• the method also includes steps for etching a second opening at a second location on the substrate through the layer of the third material, the second oxide layer, the layer of the second material and the first oxide layer to the layer of the first material and steps for forming a body of the first material in the second opening to a level of the top surface of the substrate.
• the method includes steps for forming first fins comprising the second material at the first location, steps for forming second fins comprising the first material at the second location and steps for forming third fins comprising the third material at a third location.
• FIGS. 1-8 are elevational views schematically showing a wafer during different processing stages according to a first embodiment.
• FIGS. 9-15 are elevational views schematically showing a wafer during processing stages according to a second embodiment.
• FIGS, 16-23 are elevational views schematically showing a wafer during processing stages according to a third embodiment.
• FIGS. 24-31 are elevational views schematically showing a wafer during processing stages according to a fourth embodiment.
• FIGS. 32-45 are elevational views schematically showing a wafer during processing stages according to a fifth embodiment.
• FIGS. 46-52 are elevational views schematically showing a wafer during processing stages according to a sixth embodiment.
• FIG. 53 is a flowchart illustrating a method according to an embodiment
• FIG. 54 is a flowchart, illustrating a method according to another embodiment.
• FIG. 55 is a schematic diagram of an exemplary wireless communication system in which embodiments of the disclosure may be used.
• FIG. 1 is a substrate 100 comprising a silicon layer 102 having a top surface 104.
• a nitride hardmask 200 having a top surface 202 has been applied to a first portion 204 of the substrate 100 leaving a second portion 206 of the substrate 100 unmasked.
• an etching process has formed an opening 300 in the substrate 100 at the unmasked second portion 206 of the substrate.
• SiGe layer 400 shows a silicon- germanium (“SiGe”) layer 400 that is grown or otherwise formed on the substrate 100 in the opening 300 and over the top surface 202 of the nitride hardmask 200.
• SiGe can be grown directly on silicon without forming a separate buffer layer.
• the SiGe layer 400 has been chemically and/or mechanically removed down to the level of the top surface 202 of the nitride hardmask 200. Oxidizing SiGe causes it to condense, and multiple oxidation processes reduce the height of the SiGe layer 400 until a top surface 402 of the SiGe layer 400 is even with the top surface 104 of the silico layer 102, as illustrated in FIG.
• FIG. 7 The result is a structure 700 comprising the silicon layer 102 with the body 400 of SiGe contained therein.
• a plurality of fins 800 are formed in the structure 700 in a conventional manner as illustrated in FIG. 8.
• a first subset 802 of the fins are formed of the silicon layer 102, and a second subset 804 of the fins are formed from the body 400 of SiGe.
• a f FET device (not illustrated) can be formed, on a semiconductor die, for example, from the device of FIG. 8, which finFET device will have some fins formed of silicon and other fins formed of germanium.
• FIG. 9 illustrates a substrate 900 that includes a silicon layer 902 having a top surface 904, a bottom oxide layer 906 on the top surface 904 of the silicon layer 902 and a top layer 908 formed of a Group III-V material such as indium arsenide or indium gallium arsenide which substrate 900 may be referred to generally as a "Group III-V on insulator.”
• the top layer 908 has a top surface 910.
• a nitride hardmask 1000 having a top surface 1002 is applied to a first portion 1004 the top surface 910 of the top layer 908 leaving a second portion 1006 of the top layer 908 exposed.
• the top layer 908 and the bottom oxide layer 906 are etched to form an opening 1 100 down to the level of the top surface 904 of the silicon layer 902.
• a SiGe layer 1200 is grown or otherwise formed in the opening 1100 and on the top surface 1002 of the nitride hardmask 1000.
• the SiGe layer 1200 can be grown directly on the silicon layer 902 without the use of a buffer layer.
• the SiGe layer 1200 is mechanically and/or chemically modified to remove the portions thereof that are not in or over the opening 1 100, and the SiGe layer 1200 is thereafter oxidized to reduce its thickness to the level of the top surface 910 of the top layer 908 as illustrated in FIG. 13.
• the nitride hardmask 1000 is removed as shown in FIG. 14 leaving a substrate 1400 comprising the top layer 908 of Group III-V material with a body 1200 of SiGe in the top layer 908.
• fins 1500 are formed from the substrate 1400 including a first subset of fins 1502 formed from the Group III-V material and a second subset of fins 1504 formed from SiGe.
• a finFET device (not illustrated) can be formed from the device of FIG. 15, w 7 hich finFET device will have some fins formed of the Group III-V material and other fins formed of SiGe.
• FIGS 16-23 A process according to a third embodiment is illustrated in FIGS 16-23.
• a substrate 1600 is provided that includes a germanium bottom layer 1602 having a top surface 1604 and an oxide layer 1606 on the top surface 1604 of the bottom layer 1602.
• a Group III-V top layer 1608 is formed on the oxide layer 1606 and has a top surface 1610.
• a nitride hardmask 1700 having a top surface 1702 is applied to a first portion 1704 of the top layer 1608 leaving a second portion 1706 exposed.
• the top layer 1608 and the oxide layer 1606 are etched down to the top surface 1604 of the germanium bottom layer 1602 to form an opening 1800.
• FIG. 19 shows a body 1900 of germanium non-selectively epitaxially deposited in the opening 1800 and over the top surface 1702 of the nitride hardmask 1700
• the bottom layer 1602 and the body 1900 are both germanium, it is not necessary to use SiGe and, instead, the germanium of the body 1900 can be grown directly on the top surface 1604 of the bottom layer 1602
• FIG. 20 illustrates a substrate 2000 after a chemical mechanical polishing process has removed the portion of the body 1900 of germanium that was outside the opening 1800, and in FIG. 21, the body 1900 of germanium in the opening 1800 is oxidized and etched to reduce its thickness to a level of the top surface 1610 of the top layer 1608.
• the nitride hardmask 1700 is removed in FIG.
• a finFET device (not illustrated) can be formed from the device of FIG. 23, which finFET device will have some fins formed of the Group III-V material and other fins formed of germanium.
• FIGS. 24-31 A process according to a fourth embodiment is illustrated in FIGS. 24-31.
• FIG. 24 illustrates a substrate 2400 having a silicon layer 2402 having a top surface 2404, a first oxide layer 2406, a germanium layer 2408 having a top surface 2410 on the first oxide layer 2406, a second oxide layer 2412 on the top surface 2410, and a Group III-V top layer 2414 having a top surface 2416.
• a nitride hardmask 2500 having a top surface 2502 is applied to a first portion 2504 of the top layer 2414 leaving a second portion 2506 of the top layer 2414 exposed.
• FIG. 24 illustrates a substrate 2400 having a silicon layer 2402 having a top surface 2404, a first oxide layer 2406, a germanium layer 2408 having a top surface 2410 on the first oxide layer 2406, a second oxide layer 2412 on the top surface 2410, and a Group III-V top layer 2414 having a top surface 2416.
• the top layer 2414 and the second oxide layer 2412 are etched at the second portion 2506 down to the top surface 2410 of the germanium layer 2408 to form an opening 2600.
• a body 2700 of germanium is grown in the opening 2600 which extends out of the opening 2600 and onto the top surface 2502 of the nitride hardmask 2500. Because the body 2700 of germanium is grown on a germanium layer 2408, a separate buffer layer is not required. Thereafter, as illustrated in FIG. 28, the portion of body 2700 on the top surface 2502 of the nitride hardmask 2500 is chemically and/or mechanically removed, and, in FIG.
• the body 2700 of germanium is oxidized and etched to reduce its thickness to the level of the top surface 2416 of the top layer 2414.
• the nitride hardmask 2500 is removed leaving a substrate 3000 comprising the top layer 2414 of the Group III-V material with a germanium body 2700 therein.
• the substrate 3000 is processed in a conventional manner to form fins 3100 illustrated in FIG 31 , a first subset 3102 of which are formed of the Group III-V material and a second subset 3104 of which are formed of germanium from the body 2700 of germanium.
• a finFET device (not illustrated) can be formed from the device of FIG, 31 , w 7 hich finFET device will have some fins fomied of the Group III-V material and other fins formed of germanium.
• FIGS. 24- 31 are somewhat similar to the embodiment of FIGS. 16-23.
• providing a silicon substrate 2400 for the germanium layer 2408 allows the substrate to be handled with conventional equipment for processing silicon while still providing a germanium layer 2408 on which to grow the germanium body 2700.
• the substrate 1600 of FIGS. 16-23 can be used to form fins in a manner similar to the method of FIGS 24-31 but, because it includes a germanium bottom layer 1602, the substrate 1600 must be processed by equipment specifically configured to handle germanium, which material is typically more fragile that silicon and more difficult to handle.
• FIGS. 32-45 illustrate a process according to a fifth embodiment, in which fins of three different materials are formed on a substrate.
• FIG. 32 illustrates a substrate 3200 having a silicon layer 3202 having a top surface 3204, a first oxide layer 3206, a germanium layer 3208 having a top surface 3210 on the first oxide layer 3206, a second oxide layer 3212 on the top surface 3210, and a Group III-V top layer 3214 having a top surface 3216.
• a nitride hardmask 3300 having a top surface 3302 is applied to a first portion 3304 of the top layer 3214 leaving a second portion 3306 of the top layer 3214 exposed.
• FIG. 32 illustrates a substrate 3200 having a silicon layer 3202 having a top surface 3204, a first oxide layer 3206, a germanium layer 3208 having a top surface 3210 on the first oxide layer 3206, a second oxide layer 3212 on the top surface 3210, and a Group III-V top layer 32
• FIG. 35 illustrates a body 3500 of germanium grown in the opening 3400 which extends out of the opening 3400 and onto the top surface 3302 of the nitride hardmask 3300. Because the body 3500 of germanium is grown on a germanium layer 3208, a separate buffer layer is not required. Thereafter, as illustrated in FIG. 36, the portion of body 3500 on the top surface 3302 of the nitride hardmask 3300 is chemically and/or mechanically removed, and, in FIG.
• the body 3500 of germanium is oxidized and etched to reduce its thickness to the level of the top surface 3216 of the top layer 3214
• the nitride hardmask 3300 is removed leaving a substrate comprising the top layer 3214 of the Group III-V material with a germanium body 3500 therein, the substrate having a top surface comprising the top of the top layer 3214 of Group III-V material.
• the process of the fifth embodiment is similar to the process of the fourth embodiment.
• a second nitride hard mask 3900 having a top surface 3902 is formed on the top surface 3802 of the substrate leaving a third portion 3904 at a location spaced from the second portion 3306 exposed.
• the top layer 3214, the second oxide layer 3212, the germanium layer 3208 and the first oxide layer 3206 are etched to form an opening 4000 that extends to the top surface 3204 of the silicon layer 3202, and in FIG.
• a body of silicon 4100 is formed on the top surface 3204 of the silicon layer 3202 which fills the opening 4000 and covers the top surface 3902 of the nitride hardmask 3900.
• the body of silicon 4100 is chemically and/or mechanically removed from the top surface 3902 of the nitride hardmask and oxidized, as illustrated in FIG. 43, until it is at the level of the top surface 3216 of the top layer 3214.
• the second nitride hardmask 3900 is removed, as illustrated in FIG. 44, leaving a substrate 4400 having a first region 3500 of germanium and a second region 4100 of silicon in the top layer 3214 of Group III-V material.
• This substrate 4400 is processed in a conventional manner to form a plurality of fins 4500, illustrated in FIG. 45.
• a first subset 4502 of the fins 4500 comprise the Group III-V material
• a second subset 4504 of the fins 4500 comprise germanium from the germanium body 3500
• a third subset 4506 of the fins 4500 comprise silicon from the second region 4100 of silicon.
• Growing the germanium on the existing germanium layer 3208 and growing the silicon on the silicon layer 3202 allows the formation of three different types of fins for use in a finFET (not illustrated) without the need to form a buffer layer for each of the different materials.
• FIGS. 46-51 illustrate a method according to a sixth embodiment.
• a silicon substrate 4600 has a silicon layer 4602 having a top surface 4604, a first oxide layer 4606 on the top surface 4604, a germanium layer 4608 on the first oxide layer 4606 and having a top surface 4610, a second oxide layer 4612 on the top surface 4610 of the germanium layer 4608.
• a top layer 4614 comprising a Group III-V material and having a top surface 4616 is formed on the second oxide layer 4612.
• a nitride hardmask 4618 having a top surface 4620 is formed on the top surface 4616 of the top layer 4614.
• This structure is generally similar to the structure of FIG. 33.
• a location for forming fins of silicon was determined independently of the location for forming fins of germanium.
• the present embodiment allows more precise control of the relative locations of these two sets of fxns.
• a top mask layer 4622 is applied to the top surface 4620 of the nitride hardmask 4618 with a first opening 4624 at a location for forming germanium fins and a second opening 4626 at a location for forming silicon fins, and, as illustrated in FIG. 47, a first opening 4700 is etched in the nitride hardmask 4618 at the first opening 4624, and a second opening 4702 is etched in the nitride hardmask 4618 at the second opening 4626. in FIG.
• the first opening is filled with a shield body of material 4800, a bottom anti-reflective material (BARC) or a photoresist or organic carbon containing film, for example, which could be formed by spin coating followed by a lithographic and development process.
• the body of material 4800 could comprise carbon-doped SiO x and be deposited by a plasma enhanced chemical vapor depositio (PECVD) process followed by lithographic process and etch.
• PECVD plasma enhanced chemical vapor depositio
• a body 4900 of silicon is grown in the opening 4802 up to the top mask layer 4622.
• the shield body of material 4800 is removed, and an opening 5002 is formed at the first opening 4624 of the top mask layer 4622.
• the top layer 4614 and second oxide layer 4612 are etched to the level of the germanium layer 4608, and, as illustrate in FIG. 51 , a body 5102 of germanium is grown in the opening 5002 up to the top mask layer 4622.
• top mask layer 4622 and the nitride hardmask 4618 are then removed to leave a substrate 5200 having a germanium body 5102 and a silicon body 4900 each surrounded by the top layer 4614 formed of the Group III-V material, which substrate can be formed into a substrate having three different types of fins substantially as shown in FIG. 45.
• a method according to an embodiment is illustrated in FIG. 53 and includes a block 5300 of providing a substrate comprising a layer of a first material having a top surface, a block 5302 of masking a first portion of the substrate leaving a second portion of the substrate exposed, a block 5304 of etching a first opening at the second portion, a block 5306 of forming a body of a second material in the opening to a level of the top surface of the layer of the first material, a block 5308 of removing the mask and a block 5310 of forming fins of the first material at the first portion and forming fins of the second material at the second portion.
• FIG. 54 Another method according to an embodiment is illustrated in FIG. 54 and includes a block 5400 of providing a substrate comprising a layer of a first material, a first oxide layer on the layer of the first material, a layer of a second material on the first oxide layer, a second oxide layer on the layer of the second material and a layer of a third material on the second oxide layer, the layer of the third material having a top surface forming a top surface of the substrate.
• the method also includes a block 5402 of etching a first opening at a first location on the substrate through the layer of the third material and through the second oxide layer to the layer of the second material, a block 5404 of forming a body of the second material in the first opening to a level of the top surface of the substrate, a block 5406 of etching a second opening at a second location on the substrate through the layer of the third material, the second oxide layer, the layer of the second material and the first oxide layer to the layer of the first material, a block 5408 of forming a body of the first material in the second opening to a level of the top surface of the substrate and a block 5410 of forming first fins comprising the second material at the first location, forming second fins comprising the first material at the second location and forming third fins comprising the third material at a third location.
• Figure 55 illustrates an exemplary wireless communication system 5500 in which one or more embodiments of the disclosure may be advantageously employed.
• Figure 55 shows three remote units 5520, 5530, and 5550 and two base stations 5540. It will be recognized that conventional wireless communication systems may have many more remote units and base stations.
• the remote units 5520. 5530, and 5550 include integrated circuit or other semiconductor devices 5525, 5535 and 5555 (including finFET's having fins of different materials as disclosed herein), which are among embodiments of the disclosure as discussed further below.
• Figure 55 shows forward link signals 5580 from the base stations 5540 and the remote units 5520, 5530, and 5550 and reverse link signals 5590 from the remote units 5520, 5530, and 5550 to the base stations 5540.
• the remote unit 5520 is shown as a mobile telephone
• the remote unit 5530 is shown as a portable computer
• the remote unit 5550 is shown as a fixed location remote unit in a wireless local loop system.
• the remote units may be any one or combination of a mobile phone, hand-held personal communication system (PCS) unit, portable data unit such as a personal data or digital assistant (PDA), navigation device (such as GPS enabled devices), set top box, music player, video player, entertainment unit, fixed location data unit such as meter reading equipment, or any other device that stores or retrieves data or computer instructions, or any combination thereof.
• PCS personal communication system
• PDA personal data or digital assistant
• navigation device such as GPS enabled devices
• Set top box music player, video player, entertainment unit
• fixed location data unit such as meter reading equipment
• Figure 55 illustrates remote units according to the teachings of the disclosure, the disclosure is not limited to these exemplary illustrated units. Embodiments of the disclosure may be suitably employed in any device having active integrated circuitry including memory and on-chip circuitry
• a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
• An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
• an embodiment of the invention can include a computer readable media embodying a method for forming a substrate having fins of different materials. Accordingly, the invention is not limited to illustrated examples and any means for performing the functionality described herein are included in embodiments of the invention.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Condensed Matter Physics & Semiconductors (AREA)
• General Physics & Mathematics (AREA)
• Manufacturing & Machinery (AREA)
• Computer Hardware Design (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Power Engineering (AREA)
• Thin Film Transistor (AREA)
• Insulated Gate Type Field-Effect Transistor (AREA)
• Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51352812

Family Applications (1)

Country Status (6)

Families Citing this family (9)

Citations (7)

Family Cites Families (14)

• 2013
  • 2013-08-01 US US13/956,398 patent/US9396931B2/en not_active Expired - Fee Related
• 2014
  • 2014-07-25 WO PCT/US2014/048270 patent/WO2015017283A1/en not_active Ceased
  • 2014-07-25 JP JP2016531780A patent/JP2016529708A/ja active Pending
  • 2014-07-25 CN CN201480043551.4A patent/CN105453251B/zh not_active Expired - Fee Related
  • 2014-07-25 EP EP14750893.1A patent/EP3028301A1/en not_active Withdrawn
  • 2014-07-25 KR KR1020167005361A patent/KR20160038031A/ko not_active Withdrawn
• 2016
  • 2016-07-14 US US15/210,420 patent/US20160322391A1/en not_active Abandoned

Patent Citations (7)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events