WO2004097930A1 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- WO2004097930A1 WO2004097930A1 PCT/JP2003/005456 JP0305456W WO2004097930A1 WO 2004097930 A1 WO2004097930 A1 WO 2004097930A1 JP 0305456 W JP0305456 W JP 0305456W WO 2004097930 A1 WO2004097930 A1 WO 2004097930A1
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- Prior art keywords
- film
- layer
- semiconductor device
- rooster
- interlayer insulating
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 31
- 239000010410 layer Substances 0.000 claims abstract description 258
- 239000011229 interlayer Substances 0.000 claims abstract description 109
- 239000010936 titanium Substances 0.000 claims abstract description 80
- 239000010949 copper Substances 0.000 claims abstract description 34
- 238000005498 polishing Methods 0.000 claims abstract description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 10
- 239000001257 hydrogen Substances 0.000 claims abstract description 10
- 241000287828 Gallus gallus Species 0.000 claims description 77
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 56
- 238000004519 manufacturing process Methods 0.000 claims description 45
- 238000000151 deposition Methods 0.000 claims description 29
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 16
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 15
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 7
- 229910052715 tantalum Inorganic materials 0.000 claims description 7
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 7
- 238000009940 knitting Methods 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 24
- 229910004298 SiO 2 Inorganic materials 0.000 description 32
- 230000002411 adverse Effects 0.000 description 26
- 238000004544 sputter deposition Methods 0.000 description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 10
- 229910052721 tungsten Inorganic materials 0.000 description 10
- 239000010937 tungsten Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000000758 substrate Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000001259 photo etching Methods 0.000 description 2
- 244000005894 Albizia lebbeck Species 0.000 description 1
- 206010063659 Aversion Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14643—Photodiode arrays; MOS imagers
- H01L27/14654—Blooming suppression
- H01L27/14656—Overflow drain structures
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/7685—Barrier, adhesion or liner layers the layer covering a conductive structure
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/7685—Barrier, adhesion or liner layers the layer covering a conductive structure
- H01L21/76852—Barrier, adhesion or liner layers the layer covering a conductive structure the layer also covering the sidewalls of the conductive structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14643—Photodiode arrays; MOS imagers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/10—Applying interconnections to be used for carrying current between separate components within a device
- H01L2221/1068—Formation and after-treatment of conductors
- H01L2221/1073—Barrier, adhesion or liner layers
- H01L2221/1078—Multiple stacked thin films not being formed in openings in dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/53204—Conductive materials
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53214—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being aluminium
- H01L23/53223—Additional layers associated with aluminium layers, e.g. adhesion, barrier, cladding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/53204—Conductive materials
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53228—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being copper
- H01L23/53238—Additional layers associated with copper layers, e.g. adhesion, barrier, cladding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a semiconductor device and a method for manufacturing the same, and more particularly, to a semiconductor device that is a CMOS image sensor and a method for manufacturing the same. Background art.
- CMOS image sensors and CCD image sensors are widely known as image sensors.
- CMOS image sensors are widely used in mobile phones and the like because they have lower image quality than CCD image sensors but consume less and are smaller in size.
- a unit pixel of a CMOS image sensor is composed of one photodiode and three or four transistors.
- FIG. 1A shows a unit pixel 110 of a 3-transistor type CMOS image sensor 100
- FIG. 1B shows a unit pixel 110 of a 4-transistor type CMOS image sensor 100.
- the former has a photodiode (PD) 120, a source follower transistor (SF-TR) 130, a select transistor (SCT-TR) 140, and a reset transistor (RST-TR) 150.
- the latter has a transfer Equipped with a transistor (TF-TR) 160.
- the PD 120 generates a signal charge by photoelectric conversion, and the SF-TR 130 converts the signal charge into a signal ⁇ .
- SCT-TR140 is used to select unit pixel 110
- RST-TR150 is used to reset PD120
- TF-TR160 is used to transfer signal charge from PD120 to SF-TR130.
- You. PD 120 is connected to reset ⁇ line 125 via RST-TR 150
- SF-TR 130 is connected to signal voltage readout line 135 via SCT-TR 140.
- SCT—TR140 is connected to select line 145
- RST—TR150 is connected to reset line 155
- TF—TR160 Is connected to the transfer line 165.
- the H 2 7 U Le by executing the H 2 7 U Le at the final stage of the wafer process, by reducing the interface state of S i / S i O 2 oxide film interface generated by damage in the wafer process, the junction leakage Often suppressed.
- the H 2 7 Neil has a disadvantage as follows regarding Rooster structure of the CMOS image sensor.
- FIG. 2 and FIG. 3 are cross-sectional views of a principal part illustrating a CMOS image sensor and a method of manufacturing the CMOS image sensor. More specifically, Fig. 2 shows a conventional example of forming a multilayer rooster structure using CMP (chemical polishing), and Fig. 3 shows a multilayer rooster B; forming a line structure using dry etchback. This is a conventional example. The left of each figure is the rooster structure of the second and subsequent layers from the bottom, and the right of each figure is the rooster 3; ⁇ structure of the first layer from the bottom. The flow of each figure A, B, and C forms a rooster 33 ⁇ 4 structure This corresponds to the process flow.
- CMP chemical polishing
- Rooster A1 (aluminum) is used as the layer material.
- CMP may be used as shown in FIGS. 2A and 2B, or a dry pack may be used as shown in FIGS. 3A and 3B.
- a SiO 2 interlayer insulating film 30 is deposited on the lower wiring structure 20 and penetrated through the SiO 2 interlayer insulating film 30.
- a via hole (window) 21 is formed, and a TiN (titanium nitride) film 45 (with a thickness of around 50 nm) is deposited on the SiO 2 interlayer insulating film 30 to form a via hole 2.
- a W (tungsten) plug layer 50 is buried in 1 and the W plug layer 50 is planarized by CMP as shown in FIG. 2B left.
- T in H 2 is S i / S i 0 2 oxide film arrives at the interface "" Ruhazu of the at which the force midway S io 2 glabellar insulating film 3 0 through the respective S i 0 2 interlayer insulation film i It is absorbed by the film 60. Therefore, the interface state of S i / S.
- the portion 4 deposited on the SiO 2 interlayer insulating film 30 of the TiN film 45 as shown in FIG. 6 remains without being removed by dry etch-back, so that the lower surface of the Ti film 60 is not exposed on the SiO 2 interlayer insulating film 30.
- FIG. 3 B right if the first layer, in order to remain without being removed by T i film 4 also de Rye etch pack portion 4 1 deposited on S i 0 2 interlayer insulation film 3 0 0 The lower surface of the Ti film 40 is exposed on the SiO 2 interlayer insulating film 30 instead of the Ti film 60.
- Prior art documents include: (1) Japanese Patent No. 30216363, Japanese Unexamined Patent Publication (Kokai) No. 7-2633654, (3) Japanese Unexamined Patent Publication (Kokai) No. 8_2935352, and Japanese Unexamined Patent Publication (Kokai) No. Heisei 8-3. No. 4 0 4 7 No. KOKO 5 5 Japanese Patent Application Laid-Open No. 9_32 6490 6 Japanese Patent Application Laid-Open No. 10 8Japanese Patent Application Laid-Open No. 2002-505595 can be mentioned. Disclosure of the invention
- the present invention with respect to semiconductors devices Rooster structure is formed by utilizing the abrasive, and an object thereof is T i film is prevented from adversely affecting the H 2 7 Neil.
- the present invention (first invention) is directed to a plug layer embedded in a window penetrating an interlayer insulating film and planarized by chemical polishing, and extending from an unfavorable interlayer insulating film to a ttff self-plug layer.
- the present invention relates to a semiconductor device which is difficult to include with an underlying film which is formed between the Ti film and an underlying film which does not convert hydrogen.
- H 2 hydrogen
- the present invention first invention
- T i film it is possible to suppress the adverse effect on the H 2 7 Neil.
- the present invention (second invention) with respect to semiconductors devices Rooster structure is formed by utilizing the reduction ⁇ polishing, and an object thereof is to suppress the T i film adversely affects 11 2 Ayuru.
- the present invention (second invention) relates to the first invention, wherein the underlay film is a TiN (titanium nitride) film or a SiN (silicon nitride) film.
- the present invention relates to a semiconductor device.
- the wiring structure is formed by using chemical polishing. With regard to the semiconductor device to be manufactured, it is possible to suppress the Ti film from affecting the H 2 anneal.
- the present invention (third invention) relates to the semiconductor device according to the first invention, wherein the IB underlying film is penetrated by the window.
- the present invention (fourth invention) relates to the first invention, wherein the disgusting undercoating film is provided with the window
- the present invention relates to a semiconductor device having a structure formed between itself and a self-supporting Bragg layer.
- the present invention (fifth invention) relates to the first invention, wherein the underlaying film is a semiconductor device having a glue layer formed between the braiding layer and the film.
- the present invention (sixth invention) is, with respect to semiconductors devices line structure using the ⁇ polishing is formed, the purpose further and this prevents the T i film adversely affects H 2 7 Neil And
- the present invention (sixth invention) relates to any one of the first to fifth inventions, further comprising a TiN (titanium nitride) sidewall covering a side surface of the Ti film.
- Semiconductor device is, with respect to semiconductors devices line structure using the ⁇ polishing is formed, the purpose further and this prevents the T i film adversely affects H 2 7 Neil And
- the present invention (sixth invention) relates to any one of the first to fifth inventions, further comprising a TiN (titanium nitride) sidewall covering a side surface of the Ti film.
- the Ti film is formed on the semiconductor device in which the cock 3 structure is formed using chemical polishing. 2 It is possible to further suppress the adverse effect on anneal.
- the present invention (seventh invention), with respect to semiconductors devices Tori ⁇ structure is formed by utilizing the reduction ⁇ polishing, and further suppresses this that T i film adversely affects H 2 7 Neil Aim.
- the present invention (seventh invention) relates to any one of the first to fifth inventions, wherein the self rooster layer is the highest rooster layer or the lowest rooster layer in the multilayer structure.
- the present invention relates to a semiconductor device characterized by the following.
- the present invention in regard to the uppermost rota layer in which the area of the lower surface of the Ti film is large, the lower surface of the underlying film that does not press H 2 (hydrogen) instead of the Ti film is exposed on the interlayer insulating film. since issued, in the semiconductor device in which the wiring structure is Togi ⁇ the i spoon «m polishing is formed, T i film it is possible to further suppress the adverse effect on the H 2 7 Neil.
- the present invention is, in the semiconductor device in which the wiring structure by utilizing the dry etch back is Ru is formed, T i film is intended to suppress an adverse effect on the H 2 7 ale.
- the present invention relates to a bragg layer buried in a window penetrating through an interlayer insulating film and planarized by dry etch back, and a braid layer between the self-interlayer insulating film and the plug layer. It has a rooster layer containing A 1 (aluminum) and Noritsu C U (copper) deposited only on the self-plug layer, and the rooster 3 ⁇ layer is the lowest rooster layer in the multi-layer rooster 3-wire structure.
- the present invention relates to a semiconductor device.
- the lower surface of the ⁇ i film is not substantially exposed in the interlayer insulating film with respect to the lowermost rooster layer which is a bottleneck when forming the rooster structure using the dry etch pack.
- T i film it is possible to suppress the adverse effect on the H 2 7 Neil.
- the present invention (a ninth invention) relates to the semiconductor device according to the first or eighth invention which is a CMOS image sensor.
- the present invention provides a Ta (tantalum) film or a TaN (tantalum nitride) film deposited on an interlayer insulating film, a tantalum Ta film, or a disgusting TaN film.
- the present invention relates to a semiconductor device comprising a layer containing Cu (copper) deposited thereon, and a CMOS image sensor.
- the present invention (the eleventh invention) relates to a method for manufacturing a semiconductor device that forms a pit structure by using polishing and polishing, in which the Ti film is prevented from adversely affecting H 2 ayule.
- the present invention includes a step of forming a window penetrating an interlayer insulating film, a step of embedding a plug layer in a ttn self-window, a step of flattening a key layer by mechanical polishing, and A step of depositing a Ti (titanium) film so as to extend from the interlayer insulating film on the ttil layer to the bragg layer, and A 1 (aluminum) on the key Ti film.
- a semiconductor device comprising: a step of depositing a wiring layer containing (copper); and a step of forming a layer underlayer that does not cause hydrogen between the inter-layer insulating film and the self-Ti film. And a method for producing the same.
- a line structure is formed using chemical mechanical polishing because the lower surface of the underlying film that does not compress H 2 (hydrogen) is exposed in the interlayer insulating film instead of the Ti film.
- H 2 hydrogen
- the present invention (twelfth invention) relates to a method for manufacturing a semiconductor device in which a ⁇ structure is formed by using chemical polishing, with the object of suppressing a Ti film from adversely affecting H 2 anneal. I do.
- the present invention (twelfth invention) relates to the eleventh invention, wherein the underlay film is a TiN (titanium nitride) film or a SiN (silicon nitride) film. And a method of manufacturing a semiconductor device.
- the present invention (the 12th invention)
- the lower surface of the TiN film or the SiN film is exposed in the interlayer insulating film instead of the Ti film. for the preparation how a semiconductor device for forming a can T i film is prevented from adversely affecting the H 2 7 Neil It becomes.
- the present invention (the thirteenth invention) relates to the eleventh invention, and relates to an it ⁇ method for manufacturing a semiconductor device, characterized in that the film is penetrated by an aversion window.
- the present invention (a fourteenth invention) is directed to the method of manufacturing the semiconductor device according to the eleventh invention, wherein the underlay film is formed between the disgusting window and the plug layer. About.
- the present invention (a fifteenth invention) is directed to the semiconductor device according to the first invention, characterized in that the ftil self-underlaying film is formed between the knitting 3 bragg layer and the disgusting Ti film. It relates to the manufacturing method.
- the present invention (the sixteenth invention) relates to a method for manufacturing a semiconductor device that forms a fiber structure by using polishing and polishing, further suppressing the Ti film from adversely affecting H 2 anneal. With the goal.
- the present invention (a sixteenth invention) is a method according to any one of the first to fifteenth aspects, wherein a step of forming a TiN (titanium nitride) sidewall covering a side surface of the Ti film is provided.
- the present invention relates to a method for manufacturing a semiconductor device, further comprising:
- the present invention since the side surfaces of the Ti film are covered with the TiN sidewalls, the present invention relates to a method of manufacturing a semiconductor device that forms a 3 ⁇ 4-line structure using chemical polishing. , the T i film further prevented from adversely affecting the H 2 7 Yule is allowed affirmative g.
- the present invention (the first invention 7), with respect to the manufacturing method of the semiconductor body apparatus for forming a Tori ⁇ structure using the reduction Miyabi ⁇ polishing, further suppress the T i film adversely affects H 2 7 Neil The purpose is to do.
- the present invention (the seventeenth invention) is the invention according to the first to fifteenth or fifteenth aspect, wherein the self-roof layer is the uppermost severe dilayer or the lowermost roan layer in the multilayer wiring structure. And a method of manufacturing a semiconductor device.
- the lower surface of the underlying film which does not awaken H 2 (hydrogen) instead of the Ti film, relates to the uppermost fiber layer in which the area of the lower surface of the Ti film increases.
- abrasive for the production method of a semiconductor device for forming a 3 ⁇ 4-ray structure utilizing a it is possible to T i film is further suppressed from adversely affecting the H 2 7 Neil Become.
- the present invention uses a dry etch back to form an X-ray structure. Respect manufacturing method of a semiconductor device that aims to prevent the T i film adversely affects 11 2 Aniru.
- the present invention includes a step of forming a window penetrating through an interlayer insulating film, a step of embedding a plug layer in a disgusting window, and a step of flattening a disgusting plug layer by dry etch packing.
- the present invention relates to a method for manufacturing a semiconductor device, characterized in that the knitting layer 3 / line layer is the lowest layer in the multilayer wiring structure.
- the lowermost rooster which is a bottleneck in forming the rooster structure using dry etch back; 3; the lower surface force of the Ti film; since it is a child so as not to be exposed, with respect to a method of manufacturing a semiconductor device for forming a Tori ⁇ structure using a dry etch back, and suppresses this that T i film adversely affects H 2 7 Neil Becomes possible.
- the present invention (the nineteenth invention) relates to the method of manufacturing a semiconductor device according to the eleventh or eighteenth invention, wherein the method is a method of manufacturing a CMOS image sensor.
- the present invention includes a step of depositing a Ta (tantalum) film or a TaN (tantalum nitride) film on an interlayer insulating film; Depositing a layer of Cu (copper) on the substrate, and a method of manufacturing a CMOS image sensor.
- FIG. 1 is a plan view showing a unit pixel of a CMOS image sensor and a circuit configuration diagram.
- FIG. 2 is a cross-sectional view of a principal part showing a CMOS image sensor and a method (CMP) for manufacturing the same.
- FIG. 3 shows the CMOS image sensor and its manufacturing method.
- FIG. 3 is a cross-sectional view of a main part showing (dry etch back).
- FIG. 4 is a cross-sectional view of a principal part showing a first embodiment of a CMOS image sensor and a method of manufacturing the same.
- FIG. 5 is a diagram for explaining the sidewall.
- FIG. 6 is a diagram for explaining the alignment mark.
- FIG. 7 is a top view of the CMOS image sensor according to the first embodiment.
- FIG. 8 is a side view of the CMOS image sensor according to the first embodiment.
- FIG. 9 is a side view of the CMOS image sensor according to the first embodiment.
- FIG. 10 is a sectional view of a principal part showing a second embodiment of the CMOS image sensor and a method of manufacturing the same.
- FIG. 11 is a fragmentary cross-sectional view showing a third embodiment of the CMOS image sensor and a method of manufacturing the same.
- FIG. 12 is a fragmentary cross-sectional view showing a fourth embodiment of the CMOS image sensor and a method of manufacturing the same.
- FIG. 13 is a top view of the CMOS image sensor according to the fourth embodiment.
- FIG. 14 is a side view of the CMOS image sensor according to the fourth embodiment.
- FIG. 15 is a sectional view of a principal part showing a fifth modification of the CMOS image sensor and its manufacturing method.
- FIG. 16 is a side view of the CMOS image sensor according to the fifth embodiment. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 4 is a cross-sectional view of a principal part showing a first embodiment of the CMOS image sensor and its manufacturing method. More specifically, FIG. 4 shows an embodiment in which a multilayer structure is formed using CMP (chemical polishing).
- Fig. 4 The left is the rooster structure of the second and subsequent layers from the bottom.
- Fig. 4 The right is the rooster structure of the first layer from the bottom.
- Fig. 4 The flow of A, B and C is the process of forming the rooster structure. Equivalent to flow.
- FIG. 4 A As shown in the left, lower Rooster 3 by CVD; depositing a S i 0 2 interlayer insulation film 3 0 on ⁇ structure 2 0, S i 0 2 interlayer insulating film 3 by sputtering 0 (the thickness 1 5 0 nm before and after) directly underlying film 5 5 on by depositing, via holes (windows) 2 1 penetrating the S I_ ⁇ 2-layer insulating film 3 0 and underlying film 5 5 formed and, by depositing through underlying film 5 5 on S i 0 2 interlayer insulation film 3 0 T i N (titanium down nitride) film 4 5 (thickness 5 0 nm before and after) the spa Ttaringu , CVD A W (tungsten) plug layer 50 is buried in the hole 21 and the W plug layer 50 is flattened by CMP as shown in FIG. 4B left. The underlay membrane 5 5 has been penetrated by the viahorne 21.
- a Si0 2 interlayer insulating film 30 is deposited on a Si substrate 10 on which pixels and the like have been formed by CVD, and the Si2 ⁇ (the thickness 1 5 0 nm before and after) directly underlying film 5 5 on second interlayer insulating film 3 0 by depositing a contact through the S i 0 2 interlayer insulation film 3 0 and underlying film 5 5 Hall (window) to form a 1 1, after depositing the via underlying film 5 5 on S i 0 2 interlayer insulation film 3 0 T i (titanium) film 4 0 (the 2 0 nm before and after) by sputtering A TiN (titanium nitride) film 45 (HJ ⁇ around 50 nm) is deposited, and a W (tungsten) plug layer 50 is buried in the contact hole 11 by CVD.
- the W plug layer 50 is planarized by CMP.
- the underlying film 55 which is the underlying film of the A1 wiring layer 70, is a film that does not emit H 2 (hydrogen), here, TiN (titanium nitride). Film or SiN (silicon nitride) film.
- H 2 hydrogen
- TiN titanium nitride
- SiN silicon nitride
- the Ti (titanium) film 60 / TiN (titanium nitride) film 65 extends from over the SiO 2 interlayer insulating film 30 to over the W plug layer 50 by sputtering.
- A1 (aluminum) to which a trace amount of Cu (copper) is added is used as a material of the A1 wiring layer 70.
- the portion 56 deposited on the SiO 2 interlayer insulating film 30 of the underlay film 55 remains as shown in FIG. the results in the formation of the underlying film 55 between the S I_ ⁇ second interlayer insulating film 30 and the T i layer 60.
- the underlying film 55 is formed between the S i 0 2 interlayer insulating film 30 and the Ti film 60, and the lower surface of the Ti film 60 is covered with the underlying film 55, thereby replacing the Ti film 60.
- an overlying film 86 (thickness: 30 to 50 nm) is further deposited on the W plug layer 50 by sputtering, and RIE (reactive 'ion' etching) by a 1 Rooster 3 side to T i N (titanium nitride) of ⁇ layer 70 or we form a side wall 87, be deposited to S i0 2 interlayer insulation film 90 Good.
- the overlying film 86 which is a film to be overlaid on the wiring layer 70, is a SiN (silicon nitride) film or a SiON (silicon nitride oxide) film. It is prevented from being removed.
- the lower surface of the Ti film 60 becomes Si 0 2 in addition to not expose the interlayer insulating film 30, the side surfaces of the T i layer 60 is not exposed to the S i O 2 interlayer insulating film 90, T i film 6 ⁇ is given an adverse effect on H 2 7 Neil Is further suppressed. Furthermore, by covering the sides of the T i layer 80 in T i N Saiduo Lumpur 87, T i layer 80 is prevented from adversely affect the H 2 7 Neil. Furthermore, by covering the side surface of the A1 layer 70 with the TN sidewall 87, reflected light noise (see the arrow in FIG. 9) that is inconvenient for the CMOS image sensor is suppressed.
- a resist pattern is formed in which only the alignment mark of the lower layer B / line structure 20 and the via hole 21 of the scribe is formed.
- the lower layer 3 ⁇ structure 20 of the alignment mark of the scribe may be exposed by etching. This facilitates alignment between the lower wiring structure 20 and the via hole 21 in photolithography.
- CMOS image sensor according to the first embodiment will be described with reference to a top view and a side view.
- FIG. 7 is a top view of the CMOS image sensor according to the first embodiment. More specifically, FIG. 7A is a top view of the Si substrate 10, FIG. 7B is a top view of the first layer (lowest wiring layer), and FIG. 7C is a second layer of the rooster. 3; Top view of the bran structure. Fig. 7D is a top view of the rooster B ⁇ structure in the third layer (top rooster layer).
- FIGS. 7B, 7C, and 7D show the A1 wiring layer 70 and the SiO 2 interlayer insulating film 90, respectively.
- the suffix “A” is given to the A1 wiring layer 7 ° of the first layer and the SiO 2 interlayer insulating film 90, and the A 1 wiring layer 70 and the Si 0 the second interlayer insulating film 90 to "subscript B" was Shasun the "» C "is the a + 1 wiring 'layer' 70 according to the third layer and S i O 2 interlayer insulating film 90.
- FIG. 7A shows PD 120, SF-TR 130, SCT-TR 140, RST-TR 150, and TF-TR 160 as shown in FIG.
- the select line 145 and the transfer line 165 as shown in FIG. 1 are shown.
- FIG. 7B the reset line 155 as shown in FIG. 1 (A 1 part of the wire layer 70A) 1
- FIG. 7C shows the reset line 125 and the signal ⁇ readout line 135 (part of the A1 three-wire layer 70B) ′ as shown in FIG.
- this CMOS image sensor has four transistors.
- Figure 7 A are furthermore, W Bragg layer 5 0 and a floating diffusion (FD), and W Bragg layer 5 0 ⁇ 2 5 reset mil wire 1 2 5, signal ® ⁇ for readout line 1 3 5 W plug layer 5 0 1 3 5 is illustrated.
- FD floating diffusion
- FIG. 8 and 9 are side views of the CMOS image sensor according to the first embodiment. More specifically, FIG. 8 is a cross-sectional view of XIX2 in FIG. 7, and FIG. 9 is a cross-sectional view of Y1Y2 in FIG.
- the rooster & ⁇ structures of the first, second and third layers are all assumed to be the rooster 3 ⁇ structure described in FIG. 4 as the first embodiment.
- the area of the uppermost wiring layer A 1 rooster B; ⁇ layer 70 is the other layer A 1 rooster ⁇ / ⁇ layer Often larger than the area of 70.
- FIGS. 7 to 9 show such a case. Therefore, the area of the lower surface of the Ti film 60 of the uppermost rooster layer is often larger than the area of the lower surface of the Ti film 60 of the other layers. Therefore, an adverse effect by H 2 7 Neil than T i layer 6 0 topmost Rooster B / line layer and T i film 6 0 Other layers sagging. Therefore, particularly for the uppermost rooster fiber layer, it can be said that the advantage of adopting the rooster 3; ⁇ structure described in FIG. 4 as the first embodiment is great.
- the area of the A1 layer 70 is often large because the A1 layer 70 is used as a light shielding layer.
- FIG. 10 is a cross-sectional view of a principal part showing a second embodiment of the CMOS image sensor and its manufacturing method. More specifically, FIG. 10 shows an embodiment in which a multilayer wiring structure is formed using CMP (chemical polishing).
- Fig. 10 shows the rooster a ⁇ structure of the second and subsequent layers from the bottom, and the flow of Fig. 10 A, B, and C corresponds to the flow of the process of forming the rooster line structure.
- the second embodiment is a modification of the first embodiment, and has common points with the first embodiment. (Column of the first embodiment), and the differences from the first embodiment are as follows (column of the second embodiment).
- TiN (titanium nitride) film 45 (also around 200 nm in the restaurant) that also doubles as an underlying film directly on the interlayer insulating film 30, and use the underlying film for the via hole 21 by CVD.
- a W (tungsten) plug layer 50 is buried through the TiN film 45, and the W plug layer 50 is planarized by CMP as shown in FIG. 10B.
- the TiN film 45 also serving as the underlying film is formed between the via hole 21 and the W plug layer 50.
- FIG. 11 is a sectional view of a principal part showing a third embodiment of a CMOS image sensor and a method of manufacturing the same. More specifically, FIG. 11 shows an embodiment in which a multilayer wiring structure is formed using CMP (chemical mechanical polishing).
- Fig. 11 Left is the fiber structure of the second and lower layers from the bottom.
- Fig. 10 Right is the wiring structure of the first layer from the bottom.
- Fig. 11 Flows of ⁇ , ⁇ , and C form the wiring structure. This corresponds to the process flow.
- the third embodiment is a modified example of the first embodiment, and has common points with the first embodiment, as described above (in the column of the first embodiment). The differences are as follows (column for the third embodiment).
- Window 21 21 a TiN (titanium nitride) film 45 (lff is around 50 nm) is deposited on the SiO 2 interlayer insulating film 30 by sputtering, and W is formed in the via hole 21 by CVD. (Tungsten) The plug layer 50 is buried, and the W plug layer 50 is planarized by CMP as shown on the left side of FIG. 11B.
- a SiO 2 interlayer insulating film 30 is deposited, a T3 ⁇ 4 film 55 is deposited, a contact horn layer 11 is formed, and a Ti film 40 is deposited.
- a TiN film 45 from above and embedding the W plug layer 50, and flattening the W plug layer 50 as shown in Fig. 4B right
- C VD pixel as shown in Fig. 11A right
- the SiO 2 interlayer insulating film 30 is deposited on the Si substrate 10 on which the like is formed, and the contact hole (window) 11 penetrating the SiO 2 interlayer insulating film 30 is formed, and sputtering is performed.
- T i titanium
- T iN titanium nitride
- the underlying film 55 (see FIG. 11C) is directly extended from the SiO 2 interlayer insulating film 30 to the W plug layer 50 by sputtering. (About 50 nm) is deposited, and in the same manner as in FIG.
- Ti extends from above the SiO 2 interbrow insulating film 30 to above the W Titanium) film 60 / TiN (titanium nitride) film 65 / A 1 (aluminum) Rooster B; layer 70ZTi (titanium) film 80ZT iN (titanium nitride) film 8.5 is deposited in this order from the bottom, and Si 0 causes deposited second interlayer insulating film 90.
- the underlay film 55 is formed between the W plug layer 50 and the Ti film 60.
- the underlying film 55 which is the underlying film of the A1 wiring layer 70, is a film that does not transmit H 2 (hydrogen), here a TiN (titanium nitride) film.
- H 2 hydrogen
- TiN titanium nitride
- the underlying film 55 is formed between the SiO 2 interlayer insulating film 30 and the Ti film 60. This is the same as in the first embodiment.
- FIG. 12 is a fragmentary cross-sectional view showing a fourth embodiment of the CMOS image sensor and its manufacturing method. More specifically, FIG. 12 is an example of forming a multilayer rooster 3; line structure using dry etchback. Fig. 12 left shows the rooster 5; 2 structure from the second layer from the bottom, and Fig. 12 right shows the rooster B; line structure of the first layer from the bottom. Fig. 12 shows the flow of rooster 3; ⁇ It corresponds to the flow of the process for forming the structure. '
- a S i O 2 interlayer insulation film 30 on the lower layer 3 ⁇ 4 ⁇ structure 20 by CVD depositing a S i O 2 interlayer insulation film 30 on the lower layer 3 ⁇ 4 ⁇ structure 20 by CVD, bi Ahoru penetrating the S i O 2 layers Ze' 30 ( Window) 21 is formed, and a TiN (titanium nitride) film 45 lff is deposited around 50 nm on the SiO 2 interlayer insulating film 30 by sputtering, and W (tungsten) is formed in the via hole 21 by CVD.
- the plug layer 50 is embedded and the W plug layer 50 is flattened by a dry etch pack as shown in FIG.
- a contact hole (window) 11 penetrating through 30 is formed, and a Ti (titanium) film 40 (thickness of about 20 nm) is deposited on the SiO 2 interlayer insulating film 30 by sputtering.
- Ti (titanium) film 40 thickness of about 20 nm
- Ti nitride) Film 45 ID? Is around 50 nm
- W (tungsten) plug layer 50 is buried in contact hole 11 by CVD, and dry etch back as shown in Fig. 12B right. As a result, the W plug layer 50 is flattened.
- Figure 12 shows the second and subsequent layers.
- Rooster 3 ⁇ 4tsuru 70ZT i (titanium) membrane 80ZT iN (titanium nitride) membrane 85 in this order around 2 Onm / / 5 Onm / 0.3.1-1.
- A1 wiring layer 70 As a material for the A1 wiring layer 70, A1 (aluminum) to which a trace amount of Cu (copper) is added is used here.
- the A1 wiring layer 70 is deposited only on approximately the W plug layer 50 of the SiO 2 interlayer insulating film 30 and the W plug layer 50. by the can to not be substantially exposed on the lower surface 3 I_ ⁇ second interlayer insulating film 4 0 Ding 1 film 4 0. Therefore, T i layer 4 0 is prevented from adversely affecting the 11 2 Aniru.
- CMOS image sensor according to the fourth embodiment will be described based on a top view and a side view.
- FIG. 13 is a top view of the CMOS image sensor according to the fourth embodiment.
- Fig. 13 corresponds to Fig. 7
- Fig. 13 A is a top view of the Si substrate 10
- Fig. 13 B is the rooster H ⁇ structure of the first layer (the lowest rooster line layer).
- Fig. 13C is a top view of the wiring structure of the second layer
- Fig. 13D is a top view of the rooster B ⁇ structure of the third layer (top rooster B; ⁇ layer). is there.
- the CMOS image sensor of FIG. 7 is a four-transistor type
- the CMOS image sensor of FIG. 13 is a three-transistor type.
- FIG. 14 is a side view of the CMOS image sensor according to the fourth embodiment.
- FIG. 13 corresponds to FIGS. 8 and 9 and is a cross-sectional view taken along the line Z 1 Z 2 of FIG. It is assumed that the rooster B ⁇ structures of the first, second and third layers are all wiring structures as described in the fourth embodiment with reference to FIGS. -.
- the lowest rooster S; the wire layer (first layer) is not routed as rooster 3 ⁇ .
- the area of the A 1 rooster fiber layer, which is the lowest rooster layer can be reduced. That is, as shown in FIG. 1 2 C right, be deposited A 1 wiring layer 7 0 only on a substantially W plug layer 5 0 of the S i 0 2 interlayer insulation film 3 0 and W plug layer 5 0 Realistically possible.
- This ⁇ a more multi-layered 3 ⁇ layer is required, which may increase the size of the CMOS image sensor, so it can be said that it is more suitable for the 3-transistor type than the 4-transistor type.
- FIG. 15 is a fragmentary cross-sectional view showing a fifth example of the CMOS image sensor and its manufacturing method. More specifically, FIG. 15 shows an embodiment in which a multilayer wiring structure is formed using CMP (chemical polishing).
- Fig. 15 Left shows the rooster structure of the second and subsequent layers from the bottom
- Fig. 15 Right shows the wiring structure of the first layer from the bottom
- Figs. 15A and 15B show the process of forming the rooster structure. It corresponds to the flow (damascene method).
- the first layer As shown in FIG. 15 A right, by depositing S i 0 2 interlayer insulation film 30 on the S i substrate 10 which is built the pixel or the like, through the S i 0 2 interlayer insulation film 30 A contact hole (window) 11 is formed, a Ti (titanium) film 40 is deposited on the SiO 2 interlayer insulating film 30, and then a TiN (titanium nitride) film 45 is deposited. After burying a W (tungsten) plug layer 50 in the hole 11 and flattening the W plug layer 50 by CMP, a SiO 2 interlayer insulating film 90 is deposited on the SiO 2 interlayer insulating film 30.
- a wiring groove 271 penetrating through the SiO 2 interlayer insulating film 90 is formed, and a Ta film (tantalum) 260 is deposited on the SiO 2 interlayer insulating film 30 and the SiO 2 interlayer insulating film 90.
- a Cu (copper) layer 270 is embedded in the groove 271 and the C ⁇ / line layer 270 is planarized by CMP as shown in the right side of FIG. 15B.
- the Ta film 260 may be replaced with a TaN (tantalum nitride) film.
- FIG. 16 is a side view of the CMOS image sensor according to the fifth embodiment.
- the wiring structures of the first and second layers have a rota-wire structure as described in FIG. 15 as the fifth embodiment, but the rooster structure of the third layer is a diagram of the first embodiment.
- the wiring structure is as described in 4.
- two or more rooster structures from the first embodiment to the fifth embodiment may be used in combination.
- the present invention can also be applied to a five-transistor type CMOS image sensor.
- the unit pixel of the 5-transistor CMOS image sensor is used to remove excess charge in addition to the photodiode, source follower transistor, select transistor, reset transistor, and transfer transistor. And an overflow drain transistor.
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Abstract
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TW092109787A TWI228793B (en) | 2003-04-28 | 2003-04-25 | Semiconductor device and manufacturing method thereof |
JP2004571296A JPWO2004097930A1 (ja) | 2003-04-28 | 2003-04-28 | 半導体装置及びその製造方法 |
PCT/JP2003/005456 WO2004097930A1 (ja) | 2003-04-28 | 2003-04-28 | 半導体装置及びその製造方法 |
CNB038253410A CN100508162C (zh) | 2003-04-28 | 2003-04-28 | 半导体器件 |
US11/116,424 US7492047B2 (en) | 2003-04-28 | 2005-04-28 | Semiconductor device and its manufacture method |
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CN102237295B (zh) * | 2010-04-28 | 2014-04-09 | 中国科学院微电子研究所 | 半导体结构制造方法 |
CN103151299A (zh) * | 2011-12-07 | 2013-06-12 | 北大方正集团有限公司 | 多层布线铝互连工艺方法、铝线互连通孔及半导体产品 |
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JP2017092499A (ja) * | 2017-02-10 | 2017-05-25 | キヤノン株式会社 | 固体撮像装置、及び撮像システム |
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TW200423296A (en) | 2004-11-01 |
TWI228793B (en) | 2005-03-01 |
CN1701434A (zh) | 2005-11-23 |
JPWO2004097930A1 (ja) | 2006-07-13 |
CN100508162C (zh) | 2009-07-01 |
US7492047B2 (en) | 2009-02-17 |
US20050242402A1 (en) | 2005-11-03 |
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