WO2008026520A1 - Dispositif à semi-conducteur et tableau de connexion multicouche - Google Patents
Dispositif à semi-conducteur et tableau de connexion multicouche Download PDFInfo
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- WO2008026520A1 WO2008026520A1 PCT/JP2007/066478 JP2007066478W WO2008026520A1 WO 2008026520 A1 WO2008026520 A1 WO 2008026520A1 JP 2007066478 W JP2007066478 W JP 2007066478W WO 2008026520 A1 WO2008026520 A1 WO 2008026520A1
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- wiring
- wiring layer
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Definitions
- the present invention relates to a semiconductor device having a multilayer wiring structure such as an IC or LSI, and a multilayer wiring board having a multilayer wiring structure on a substrate including at least one of a semiconductor, a conductor, and an insulator.
- a multilayer wiring structure is used in order to cope with an increase in the length and area of wiring accompanying the integration of various elements therein.
- miniaturization of wiring patterns has been promoted in order to cope with further higher integration, and the cross-sectional area of the wiring has been reduced.
- the current flowing through the wiring has increased in order to realize high-speed operation. Tend to. That is, in these semiconductor devices, the density of current flowing through each wiring tends to increase.
- inter-layer heat transfer is performed by providing thermal vias filled with an insulator (A1N) having a larger thermal conductivity than the interlayer insulating film in the through-holes formed in the interlayer insulating film.
- A1N an insulator having a larger thermal conductivity than the interlayer insulating film in the through-holes formed in the interlayer insulating film.
- Patent Document 1 Japanese Patent Laid-Open No. 9 129725
- Patent Document 2 International Publication WO00 / 74135
- an object of the present invention is to provide a thermal via having a low relative dielectric constant and to provide a multilayer wiring structure capable of simultaneously realizing a low dielectric constant and high thermal conductivity of interlayer insulation. To do.
- Another object of the present invention is to provide a multilayer wiring board in which interlayer insulation of a multilayer wiring structure can simultaneously realize low dielectric constant and high thermal conductivity.
- Still another object of the present invention is to provide a semiconductor device having a multilayer wiring structure capable of simultaneously realizing a low dielectric constant and a high thermal conductivity.
- At least one of a semiconductor, a conductor, and an insulator is included.
- the relative dielectric constant is averaged between the first wiring layer in the multilayer wiring structure and the second wiring layer thereon. 2.
- a gas or insulator of 5 or less is interposed, a conductive connector is provided between at least one wiring in the first wiring layer and at least one wiring in the second wiring layer, and
- a multilayer wiring board is obtained, wherein an insulating thermal conductor having a relative dielectric constant of 5 or less is provided between a predetermined wiring in the first wiring layer and a predetermined wiring in the second wiring layer.
- the thermal conductivity of the insulator thermal conductor is It is preferable that the thermal conductivity is greater than
- the insulator interposed between the first wiring layer and the second wiring layer may include a material layer containing carbon and fluorine.
- the material layer is preferably an insulating layer mainly composed of a fluorocarbon layer.
- the insulator interposed between the first wiring layer and the second wiring layer may include a material layer containing carbon and hydrogen.
- the material layer is preferably, for example, an insulating layer mainly composed of a hydrated carbon layer, or an insulating layer in which a fluorocarbon layer and a hydrated carbon layer are mixed.
- the insulator heat conductor may include a material containing silicon, carbon, and nitrogen, for example, SiCN.
- the first wiring layer in the multilayer wiring structure and the second wiring thereon Gas or insulation with a relative dielectric constant of 2.5 or less on average between the wiring layer
- a desired conductive connector is provided between at least one wiring in the first wiring layer and at least one wiring in the second wiring layer, and a predetermined wiring in the first wiring layer And a predetermined wiring in the second wiring layer, an insulating heat conductor having a relative dielectric constant of 5 or less is provided.
- the thermal conductivity of the insulator thermal conductor is the heat conductivity of the insulator. It is preferable that the conductivity is larger than the conductivity! /.
- the insulator interposed between the first wiring layer and the second wiring layer may include a material layer containing carbon and fluorine.
- the material layer is preferably an insulating layer mainly composed of a fluorocarbon layer.
- the insulator interposed between the first wiring layer and the second wiring layer may include a material layer containing carbon and hydrogen.
- the material layer is preferably, for example, an insulating layer mainly composed of a hydrated carbon layer, or an insulating layer in which a fluorocarbon layer and a nodular carbon layer are mixed.
- the insulator thermal conductor may include a material containing silicon, carbon, and nitrogen.
- SiCN may be used.
- a gas or an insulator having an average relative dielectric constant of 2.5 or less is interposed between the first wiring layer and the second wiring layer, and the relative dielectric constant.
- a multilayer wiring structure with a low dielectric constant and a high thermal conductivity by forming a thermal via using an insulator with a thermal conductivity of 5 or less.
- FIG. 1 is a cross-sectional view showing a schematic configuration of a semiconductor device to which the present invention is applied.
- FIG. 2 shows a configuration of an interlayer insulating film used in the semiconductor device according to the first embodiment of the present invention.
- FIG. 3 is a partial cross-sectional view showing the configuration of a semiconductor device according to a second embodiment of the present invention.
- FIG. 4A is a diagram for explaining a method for forming a thermal via of the semiconductor device shown in FIG. 3.
- FIG. 4A is a diagram for explaining a method for forming a thermal via of the semiconductor device shown in FIG. 3.
- 4B is a diagram for explaining a method for forming a thermal via of the semiconductor device shown in FIG. 3.
- 4C is a view for explaining a method for forming a thermal via of the semiconductor device shown in FIG. 3.
- 4D is a diagram for explaining a method for forming a thermal via of the semiconductor device shown in FIG. 3.
- 5A is a diagram for explaining a method of forming a conductive via of the semiconductor device shown in FIG. 3.
- 5B is a diagram for explaining a method of forming the conductive via of the semiconductor device shown in FIG. 3.
- the semiconductor device has at least a first wiring layer and a second wiring layer thereon on a substrate including a semiconductor region.
- a substrate including a semiconductor region For example, as shown in FIG. 1, seven layers of wiring layers 101 to 107 formed on a silicon substrate 100, between them, between the lowermost wiring layer 101 and the substrate 100, and the uppermost layer It may have interlayer insulating films 109 to 116 disposed between the wiring layer 107 and the heat dissipation device 108.
- the boundary between the wiring layer and the interlayer insulating film is not shown.
- the numerical values shown on the left side of each wiring layer and the numerical values shown on the right side of each interlayer insulating film show examples of the layer thickness and film thickness, respectively.
- the numerical values shown below the wiring layer 101 and above the wiring layer 106 show examples of the wiring width and wiring pitch, respectively.
- the semiconductor device means a device in which an electric circuit or an electric element is formed on a single substrate at high density, that is, a device in which transistors, resistors, capacitors, etc. are integrated. Specifically, IC and LSI.
- the substrate in addition to the silicon substrate on which the semiconductor element is formed, for example, a metal substrate, a general semiconductor substrate, an insulator substrate such as glass or plastic, or a semiconductor after being coated with an insulator film
- a metal substrate covered with a film, an insulator substrate covered with a semiconductor film, or the like can be used.
- the substrate to allow for use as the conductive substrate, at least the surface and / or the electrical conductivity of the material (semiconductor material such as Si or GaAs) which constitutes the rear surface 10- 8 (Omega ' C ⁇ 1 or more is desirable. Further, the surface and / or the back surface of the substrate is preferably as flat as possible since various elements and the like are produced thereon.
- the metal Ta, Ti, W, Co, Mo, Hf, Ni, Zr, Cr, V, Pd, Au, Pt, Mn, Nb, Cu, Ag, or Al are preferable.
- As the semiconductor Si, Ge, GaAs, or C (diamond) is preferable. Examples of insulators covered with a semiconductor film include SiO (silicon oxide) and SiN (silicon nitride).
- A1N aluminum nitride
- Al 2 O aluminum oxide
- a composite membrane is preferred.
- Metals coated with an insulator film and then with a semiconductor film include Ta, Ti, W, Co, Mo, Hf, Ni, Zr, Cr, V, Pd, Au, Pt, Mn, Nb, Cu , Ag, or Al are preferred.
- metal wiring, polysilicon, or polycide can be used as wiring of the first wiring layer and the second wiring layer.
- the metal thin film used for this wiring is a high-vacuum metal deposition sputter or metal chloride at high temperature so as not to form an oxide-like intermediate layer with the semiconductor surface. It is produced by the CVD method.
- Examples of the material for the metal thin film include the following.
- GaAs semiconductor devices there are Au, Al, Ni, Pt, and alloys containing these as main components.
- the semiconductor device according to the present embodiment has an electrical connection between the first wiring layer and the second wiring layer. It has a first insulator (interlayer insulating film) that is electrically insulated.
- first insulator interlayer insulating film
- an interlayer insulating film is also provided between these wiring layers.
- the first insulator has a base layer 201 and a CF (fluoro-force one-bon) film 202 formed thereon.
- the underlayer is, for example, a SiCN film, a SiN film, a SiCO film, a SiO film, a CH film, or the like.
- Their relative dielectric constant is 4 or less.
- the relative dielectric constant of the SiCO film is 3 or less, and the relative dielectric constant of the CH film is 2.5 or less.
- the CF film 202 is formed by, for example, CVD that decomposes a fluorocarbon gas as a reaction gas with Xe or Kr plasma.
- the CF film 202 is formed by CVD that decomposes the fluorocarbon gas with Ar plasma.
- a CF film having a two-layer structure (202a and 202b in FIG. 2) can be obtained by sequentially performing these CVDs.
- the CF film formed by Ar plasma has a lower relative dielectric constant than the CF film formed by Xe or Kr plasma. In any case, the relative dielectric constant can be lowered to 2 or less, or about 1.7.
- the fluorocarbon gas has a general formula C F (where n is 2
- An unsaturated aliphatic fluoride represented by F (n is an integer of 2 to 8) can be used.
- fluorocarbons represented by the general formula C F such as fluorocarbons containing fluorocyclobutane
- Bonn is preferred.
- the first CF film is removed from 5 to 5 by Xe or Kr plasma.
- a second CF film is formed to 280 to 500 nm by Ar plasma.
- N gas is introduced into the Ar gas plasma to generate nitrogen radicals (plasma is generated only by N gas).
- Nitrogen radicals may be generated), and degassing from the surface of the CF film may be reduced by nitriding the surface of the CF film (thickness 1 to 5 nm, preferably 2 to 3 nm). This eliminates film peeling and allows the relative dielectric constant to be controlled within the range of 1.7 to 2.2.
- annealing is performed in an inert gas atmosphere, preferably under reduced pressure of about lTorr (about 133 Pa).
- a CH film may be used instead of the CF film or laminated on the CF film. As described above, the CH film can have a low relative dielectric constant of 2.5 or less. CH film is like C H or C H
- a gas is introduced together with Ar, etc. to make it into plasma, and it is formed by CVD.
- the interlayer insulating film has a Si N film, Si on the upper surface of the formed CF film and / or CH film.
- a multilayer film composed of a CN film, a SiCO film, a CH film, or a combination thereof may be formed.
- the relative dielectric constant of the interlayer insulating film configured as described above is formed so as to be less than 2.5 on the average (as a whole).
- the thermal conductivity of the CF film is 0.13—0.21 (W / mK), and 10 ⁇ 7 to 6.2 ⁇ 2 of SiO.
- the interlayer insulating film penetrates in order to electrically and thermally connect between the wirings of the wiring layers positioned above and below (for example, between the wirings of the first wiring layer and the second wiring layer).
- a hole (not shown) is formed.
- This through hole is also called a via hole, and can be generally produced by a technique called photoetching.
- the hole diameter is determined based on the width of the wiring located above and below. This through hole is used as a through hole for electrically connecting the wirings and as a dummy hole for thermally connecting the wirings.
- the through hole (conductive connection body) is a through-hole formed in the interlayer insulating film filled with a conductive material.
- the purpose of the through hole is to establish conduction between the upper and lower wirings that are electrically separated by the first insulator. Therefore, the through hole is provided only at a position necessary for circuit formation, and cannot be provided at an arbitrary position.
- the through hole can be formed by a known method.
- the through-hole can transfer not only electrical signals but also heat.
- a dummy hole (insulating thermal conductor) is a through-hole formed in an interlayer insulating film filled with a second insulator having a thermal conductivity larger than that of the first insulator. .
- the wire can transfer heat from one wire to the other wire faster than the first insulator between the upper and lower wires electrically separated by the first insulator. Therefore, the dummy hole is also called a thermal via.
- thermal vias By providing thermal vias, when the temperature of a certain wiring rises, heat can be quickly transferred to other wiring, heat dissipation can be promoted, and abnormal temperature rise of each wiring can be suppressed. Since the dummy hole is an insulator, it does not transmit electrical signals. Therefore, the dummy hole can be provided at an arbitrary place.
- SiCN is used as the second insulator. SiCN can achieve sufficient heat conduction even when a CF film is used as an interlayer insulation film, which has a high thermal conductivity of about 100 W / mK. In addition, the relative dielectric constant of SiCN is 5 or less (about 4.0), and the average relative dielectric constant of the interlayer insulating film is not significantly increased.
- SiCN is formed, for example, by plasma treatment using SiH / C H / N.
- silane gas (SiH) / ethylene (C H) organic silane is used.
- a heat dissipation device 108 may be provided on the uppermost layer of the semiconductor device of the present embodiment.
- the heat dissipation device is, for example, a conductive film or a fin structure made of a material having high thermal conductivity (for example, Ag, Cu, Au, Al, Ta, Mo).
- the dielectric constant of the substantial interlayer insulating material is reduced to ensure high-speed operation, and dummy holes are introduced at necessary points between the wirings with high thermal conductivity SiCN. By doing so, it is possible to improve the reliability of the wiring by suppressing the temperature rise of the wiring.
- Si CN instead of Si CN, use an insulator with a dielectric constant of 5 or less and a thermal conductivity higher than that of CF or CH film.
- FIG. 3 shows a partial configuration of a semiconductor device according to the second embodiment of the present invention.
- the interlayer insulating film between the wiring layers is removed by removing the thermal via (corresponding to the dummy hole in the first embodiment) and the interlayer insulation is formed by the gas! / It is an integrated circuit with a wiring structure.
- this semiconductor device includes a p-type substrate 301, a CMOS configuration n-wall 302, an nMOS source region 303, an nMOS drain region 304, an nMOS gate insulating film 305, nM It includes an OS gate electrode 306, an nMOS source electrode 307, and an nMOS drain electrode 308.
- the semiconductor device also includes a pMOS drain region 309, a pMOS source region 310, a pMOS gate insulating film 312, a pMOS gate electrode 311, a pMOS source electrode 313, and a pMOS drain electrode 314.
- the semiconductor device further includes an element isolation region (SiO, etc.) 315,
- It includes a back electrode 317, one or more layers of metal wiring 318, conductive vias (through hole nozzles 319 of the first embodiment), and thermal pins 320.
- the thermal via 320 is shown to connect between the metal wirings 318 adjacent in the vertical direction in the figure.
- the metal wiring adjacent in the horizontal direction in the figure is shown.
- the springs 318 may also be connected.
- the semiconductor device of FIG. 3 uses Cu as the metal wiring.
- the Cu wiring has a giant grain structure to reduce its resistivity. With this metal wiring and interlayer insulation using gas, the signal delay in each wiring can be reduced to about 1/8.
- the dielectric constant of BPSG (Boron— doped Phospho- Silicate Glass), a typical interlayer insulating film, is 4
- the surfaces of the metal wiring 318 and the conductive via 319 are covered with a nitride (not shown) such as titanium nitride, tantalum nitride, or silicon nitride.
- a nitride such as titanium nitride, tantalum nitride, or silicon nitride.
- the thermal via 320 can be inserted at an arbitrary position, and is based on the structural robustness and the degree of increase in the wiring temperature. The purchase location is then determined.
- This semiconductor device can be obtained by removing BPSG after being manufactured as a semiconductor device (semi-finished product) having BPSG as an interlayer insulating film. Therefore, the semi-finished product is manufactured by the same method as that for the conventional semiconductor device. Thermal vias and conductive vias are formed as follows.
- the surface of the Cu wiring 401 is stabilized on the Cu (alloy) wiring 401.
- a photoresist 406 as a pattern for forming a via hole and a via hole is sequentially formed. It corresponds to Si N 403, BPSG 404 and Si N 405 force interlayer insulating film.
- SiCN4 is obtained by plasma treatment using SiH / C H / N.
- Silane silane may be used.
- planarization processing such as CMP (Chemical Mechanical Polishing) is performed.
- the thermal via (SiCN) 407 can be formed in the BPSG 404.
- the thermal conductivity of air is 0.0241 (W / mK).
- SiCN has a relative dielectric constant of about 4, so it does not significantly increase the average relative dielectric constant of the interlayer insulation (space).
- a damascene or dual damascene process is used to form conductive vias and wiring.
- Cu is used for wiring.
- Force that can use A1 or A1 alloy for conductive vias Here, the case of using the same Cu as wiring will be explained.
- a rare gas such as Ar, Kr, or Xe is supplied from the first-stage shower plate, and Cu (hgac) (tmvs), Cu (hgacXteovs), etc., which are Cu supply sources, are supplied as Ar carrier gas.
- Cu hgac
- Cu hgacXteovs
- Ar carrier gas Ar carrier gas
- the second stage shower plate Plasma excitation by microwaves is performed at a distance of several millimeters directly below the first stage shower plate, and the second stage shower plate is installed in the diffusion plasma region, so the source gas is excessively decomposed. There is nothing.
- a semi-finished product having BPSG as an interlayer insulating film and having thermal vias and conductive vias formed at predetermined positions of BPSG is obtained.
- HF molecules dissolve in water and generate HF ions that etch SiO. That
- the moisture adsorbed on the wafer surface should be removed to at least the monolayer.
- the moisture adsorbed on the wafer surface should be removed to at least the monolayer.
- the wiring is covered with Si N, TaN, TiN, etc., and these nitrides do not react with HF gas.
- the semiconductor device of FIG. 3 can be manufactured.
- the embodiments have been described in the case of the semiconductor device.
- the present invention can be applied to all multilayer wiring boards having a multilayer wiring structure on a substrate including at least one of a semiconductor, a conductor, and an insulator. Needless to say.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Formation Of Insulating Films (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020097000846A KR101334004B1 (ko) | 2006-08-28 | 2007-08-24 | 반도체 장치 및 다층 배선 기판 |
| US12/310,483 US7977796B2 (en) | 2006-08-28 | 2007-08-24 | Semiconductor device and multilayer wiring board |
| EP07806064A EP2059103A4 (en) | 2006-08-28 | 2007-08-24 | SEMICONDUCTOR ASSEMBLY AND MULTILAYER CONDUCTOR PLATE |
| CN2007800313659A CN101507374B (zh) | 2006-08-28 | 2007-08-24 | 半导体装置以及多层布线基板 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006231008A JP5120913B2 (ja) | 2006-08-28 | 2006-08-28 | 半導体装置および多層配線基板 |
| JP2006-231008 | 2006-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008026520A1 true WO2008026520A1 (fr) | 2008-03-06 |
Family
ID=39135803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/066478 Ceased WO2008026520A1 (fr) | 2006-08-28 | 2007-08-24 | Dispositif à semi-conducteur et tableau de connexion multicouche |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7977796B2 (ja) |
| EP (1) | EP2059103A4 (ja) |
| JP (1) | JP5120913B2 (ja) |
| KR (1) | KR101334004B1 (ja) |
| CN (1) | CN101507374B (ja) |
| TW (1) | TWI401782B (ja) |
| WO (1) | WO2008026520A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012046675A1 (ja) * | 2010-10-08 | 2012-04-12 | 国立大学法人東北大学 | 半導体装置の製造方法および半導体装置 |
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| DE102007011126B4 (de) * | 2007-03-07 | 2009-08-27 | Austriamicrosystems Ag | Halbleiterbauelement mit Anschlusskontaktfläche |
| JP5419167B2 (ja) * | 2010-08-10 | 2014-02-19 | 国立大学法人東北大学 | 半導体装置の製造方法および半導体装置 |
| WO2013125647A1 (ja) * | 2012-02-22 | 2013-08-29 | 東京エレクトロン株式会社 | 半導体装置の製造方法及び半導体装置 |
| US9246100B2 (en) * | 2013-07-24 | 2016-01-26 | Micron Technology, Inc. | Memory cell array structures and methods of forming the same |
| JP6652443B2 (ja) * | 2016-05-06 | 2020-02-26 | 株式会社日本マイクロニクス | 多層配線基板及びこれを用いたプローブカード |
| US11052228B2 (en) | 2016-07-18 | 2021-07-06 | Scientia Vascular, Llc | Guidewire devices having shapeable tips and bypass cuts |
| KR102808553B1 (ko) | 2019-09-04 | 2025-05-16 | 삼성전자주식회사 | 재배선 패턴을 가지는 집적회로 소자 |
| US11676872B2 (en) * | 2020-06-10 | 2023-06-13 | Menlo Microsystems, Inc. | Materials and methods for passivation of metal-plated through glass vias |
| CN114126187B (zh) * | 2020-08-26 | 2024-05-10 | 宏恒胜电子科技(淮安)有限公司 | 具有内埋散热结构的线路板及其制作方法 |
| US11658092B2 (en) | 2020-11-13 | 2023-05-23 | Taiwan Semiconductor Manufacturing Company, Ltd. | Thermal interconnect structure for thermal management of electrical interconnect structure |
| US20230031333A1 (en) * | 2021-07-30 | 2023-02-02 | Taiwan Semiconductor Manufacturing Company, Ltd. | Device level thermal dissipation |
| DE102022127607A1 (de) * | 2022-10-19 | 2024-04-25 | Elmos Semiconductor Se | Elektronisches Modul für eine Daisy-Chain und zum Erzeugen einer eindeutigen ID-Nummer |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW200830514A (en) | 2008-07-16 |
| US7977796B2 (en) | 2011-07-12 |
| EP2059103A4 (en) | 2010-08-04 |
| EP2059103A1 (en) | 2009-05-13 |
| JP2008053639A (ja) | 2008-03-06 |
| KR101334004B1 (ko) | 2013-11-27 |
| CN101507374A (zh) | 2009-08-12 |
| US20090283901A1 (en) | 2009-11-19 |
| TWI401782B (zh) | 2013-07-11 |
| CN101507374B (zh) | 2011-03-30 |
| JP5120913B2 (ja) | 2013-01-16 |
| KR20090046782A (ko) | 2009-05-11 |
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