WO2006005095A1 - Werkstoff für leitbahnen aus kupferlegierung - Google Patents
Werkstoff für leitbahnen aus kupferlegierung Download PDFInfo
- Publication number
- WO2006005095A1 WO2006005095A1 PCT/AT2005/000262 AT2005000262W WO2006005095A1 WO 2006005095 A1 WO2006005095 A1 WO 2006005095A1 AT 2005000262 W AT2005000262 W AT 2005000262W WO 2006005095 A1 WO2006005095 A1 WO 2006005095A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- elements
- interconnects
- group
- separation
- sputtering target
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- 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
- H01L23/53233—Copper alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/10—Alloys based on copper with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49866—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers characterised by the materials
-
- 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
-
- 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
- H01L2924/30—Technical effects
- H01L2924/301—Electrical effects
- H01L2924/3011—Impedance
Definitions
- the invention relates to a material for interconnects made of a copper alloy with Cu> 90 At.% And a sputtering target for the deposition of this material.
- Conductor systems are a basic element of a microelectronic component and consist of one or more interconnects applied to the substrate, different coating methods such as PVD or CVD being used.
- the requirements for the electrical conductivity of the material selected for the interconnect increase, as for example in the case of gate electrodes for TFT-LCDs, since the required response times become shorter and the microelectronic components become larger. Therefore, only materials with sufficiently high electrical conductivity, such as, e.g. Aluminum or refractory metals and their alloys for use.
- copper is an ideal material. Copper deposited on glass, however, has poor film adhesion. In addition, the oxidation resistance is insufficient. Furthermore, copper has low resistance to electromigration. Electromigration occurs when an electric field is superimposed on non-directional thermal diffusion, resulting in a net flow of material in the direction of electron flow. Another problem is the high diffusion rate of copper into surrounding thin layers. When using alloys, it is important that the conductivity is minimally affected. Furthermore, it is crucial that the coating material contains no non-etchable structural constituents, as this also makes the production of defect-free electronic components very difficult. This also limits the alloy selection. There are many approaches to using copper alloys for ULSI structures. Thus, US Pat. No.
- 5,023,698 describes a Cu alloy which contains at least one element from the group Al, Be, Cr, Fe, Mg, Ni, Si, Sn and Zn.
- the Cr content is limited to 0.01 to 0.3 wt.%
- the Si content is limited to 0.01 to 0.2 wt.%.
- US Pat. No. 5,077,005 again discloses a copper alloy containing at least one element from the group In, Cd, Sb, Bi, Ti, Ag, Sn, Pb, Zr in a content of 0.0003 to 0.01% by weight.
- none of these alloys has sufficient adhesion to the glass substrate combined with sufficient oxidation resistance and resistance to electromigration.
- the object of this invention is a material for copper-based interconnects and a sputtering target for deposition thereof that meets the broad requirement profile such as low electrical resistance, good adhesion to the glass substrate, good oxidation resistance and low electromigration rate.
- the material contains 0.5 to 10 at.% Of one or more elements from the group Ca 1 Sr, Ba, Sc, Y, lanthanides, Ti, Zr, Hf, Cr and Si. It has been found that these elements in the specified concentration range increase both the adhesive strength, the deposited layer on the glass substrate, and the oxidation resistance. This is also the case for elements (Cr, Si, Ti), which lead to no improvement at lower concentration. Since the Cu content is> 90 at.% And, moreover, the alloying elements have no solubility in the Cu, it is ensured that the electrical conductivity is above that of currently used Al and refractory metal alloys.
- the alloying of 0 to 5 At.% Of one or more elements from the group Mg, V, Nb, Ta, Mo, W, Ag, Au, Fe, B has essentially no influence on the layer adhesion, but additionally increases the low-temperature oxidation resistance.
- the alloys according to the invention also have precipitated portions of a second phase, whereby the resistance to electromigration is given sufficiently. The formation of this second phase can already be seen in the
- the material contains 0.5 to 10 at.%, In particular 1 to 7 at.% Of one or more elements from the group Sc, Y, lanthanides, Cr and Si. Excellent results in terms of layer adhesion and oxidation are also achieved when 0.5 to 5 at.% Of one or more elements from the group Sc, Y, lanthanides in combination with 0.5 to 5 At.% Cr and / or Si Use especially with very good results at 1 to 4 At.% Of one or more elements from the group Sc, Y, lanthanides in combination with 0.5 to 3 At.% Cr.
- 0.1 to 3 at.% Mg, Ag and / or Au an additional improvement of the oxidation resistance can be achieved.
- sputtering targets are used, which have substantially the same chemical composition as the layer material.
- the sputtering targets according to the invention are preferably produced by means of powder metallurgical process techniques, in which case it is possible to use as consolidation techniques both pressing / sintering techniques, hot pressing techniques, hot isostatic pressing techniques and infiltration techniques. Furthermore, a subsequent forming step, for example, by rolling, extrusion or planforming proves to be advantageous.
- the grain size is ⁇ 500 microns.
- the advantageous grain size is ⁇ 200 ⁇ m and, in the case of rolled or extruded products, refers to a measurement in cross section, for forged products to a corresponding measurement transverse to the direction of flow of the material.
- the density of the sputtering targets is advantageously> 97%, preferably> 98.5%, with converted sputtering targets> 99.8% of the theoretical density.
- Copper powder with a grain size of 130 microns was mixed with the respective alloy powders in a diffusion mixer. After filling the powder mixture into a non-alloy steel container and degassing treatment, the container was evacuated and sealed gas-tight.
- the hot compaction takes place in a HIP plant at a temperature of 100 to 200 ° C below the respective solidus temperature of the copper alloy forming and 2000 bar.
- the density was included in all alloy variants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Physical Vapour Deposition (AREA)
- Conductive Materials (AREA)
- Electrodes Of Semiconductors (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800236865A CN1985014B (zh) | 2004-07-15 | 2005-07-11 | 铜合金制造的导线材料 |
JP2007520614A JP2008506040A (ja) | 2004-07-15 | 2005-07-11 | 銅合金から製造した導電線のための材料 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATGM501/2004 | 2004-07-15 | ||
AT0050104U AT7491U1 (de) | 2004-07-15 | 2004-07-15 | Werkstoff für leitbahnen aus kupferlegierung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006005095A1 true WO2006005095A1 (de) | 2006-01-19 |
Family
ID=38160537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2005/000262 WO2006005095A1 (de) | 2004-07-15 | 2005-07-11 | Werkstoff für leitbahnen aus kupferlegierung |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2008506040A (de) |
KR (1) | KR20070039914A (de) |
CN (1) | CN1985014B (de) |
AT (1) | AT7491U1 (de) |
WO (1) | WO2006005095A1 (de) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1811057A1 (de) * | 2006-01-23 | 2007-07-25 | W.C. Heraeus GmbH | Sputtertarget mit hochschmelzender Phase |
JP2008051840A (ja) * | 2006-08-22 | 2008-03-06 | Mitsubishi Materials Corp | 熱欠陥発生がなくかつ密着性に優れた液晶表示装置用配線および電極並びにそれらを形成するためのスパッタリングターゲット |
JP2008057031A (ja) * | 2006-07-31 | 2008-03-13 | Mitsubishi Materials Corp | 熱欠陥発生のない液晶表示装置用配線および電極並びにそれらを形成するためのスパッタリングターゲット |
JP2008107710A (ja) * | 2006-10-27 | 2008-05-08 | Mitsubishi Materials Corp | 熱欠陥発生が少なくかつ表面状態の良好な液晶表示装置用配線および電極並びにそれらを形成するためのスパッタリングターゲット |
JP2008205420A (ja) * | 2006-10-18 | 2008-09-04 | Mitsubishi Materials Corp | 熱欠陥発生が少なくかつ表面状態の良好なtftトランジスターを用いたフラットパネルディスプレイ用配線および電極並びにそれらを形成するためのスパッタリングターゲット |
JP2009169268A (ja) * | 2008-01-18 | 2009-07-30 | Mitsubishi Materials Corp | 密着性に優れた液晶表示装置用配線および電極 |
JP2009185323A (ja) * | 2008-02-05 | 2009-08-20 | Mitsubishi Materials Corp | 熱欠陥発生がなくかつ密着力に優れた液晶表示装置用配線および電極 |
EP2220264A1 (de) * | 2007-10-24 | 2010-08-25 | H. C. Starck, Inc. | Mit refraktärem metall dotierte sputtertargets |
CN102736333A (zh) * | 2012-06-18 | 2012-10-17 | 深圳市华星光电技术有限公司 | 一种阵列基板、液晶显示装置和阵列基板的制作方法 |
CN103459654A (zh) * | 2011-03-01 | 2013-12-18 | 吉坤日矿日石金属株式会社 | 铜钛合金制溅射靶、使用该溅射靶形成的半导体布线以及具备该半导体布线的半导体元件和器件 |
CN104046809A (zh) * | 2014-06-05 | 2014-09-17 | 锐展(铜陵)科技有限公司 | 一种汽车电子设备用铜合金线的制备方法 |
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- 2005-07-11 KR KR1020077000235A patent/KR20070039914A/ko not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
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JP2008506040A (ja) | 2008-02-28 |
KR20070039914A (ko) | 2007-04-13 |
AT7491U1 (de) | 2005-04-25 |
CN1985014B (zh) | 2010-06-02 |
CN1985014A (zh) | 2007-06-20 |
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