EP1665351A2 - Structure multi-zones apte a subir un recuit par irradiation lumineuse et procede de mise en oeuvre de ladite structure - Google Patents
Structure multi-zones apte a subir un recuit par irradiation lumineuse et procede de mise en oeuvre de ladite structureInfo
- Publication number
- EP1665351A2 EP1665351A2 EP04816130A EP04816130A EP1665351A2 EP 1665351 A2 EP1665351 A2 EP 1665351A2 EP 04816130 A EP04816130 A EP 04816130A EP 04816130 A EP04816130 A EP 04816130A EP 1665351 A2 EP1665351 A2 EP 1665351A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- layer
- characteristic
- zones
- thermal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/009—Working by laser beam, e.g. welding, cutting or boring using a non-absorbing, e.g. transparent, reflective or refractive, layer on the workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/53—Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P34/00—Irradiation with electromagnetic or particle radiation of wafers, substrates or parts of devices
- H10P34/40—Irradiation with electromagnetic or particle radiation of wafers, substrates or parts of devices with high-energy radiation
- H10P34/42—Irradiation with electromagnetic or particle radiation of wafers, substrates or parts of devices with high-energy radiation with electromagnetic radiation, e.g. laser annealing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
Definitions
- the invention relates to techniques of annealing by radiation or light irradiation, in particular by laser, in particular of thin layers, but also of solid materials.
- Laser annealing is a known technique for annealing thin layers. This technique uses the fact that a thin layer can be optically absorbent at certain wavelengths. By using a laser whose wavelength corresponds to the spectral range where the layer absorbs light, there is absorption of photons and heating of the layer to be annealed. Temperatures can be very high (a few hundred degrees to a few thousand degrees) depending on the absorption coefficient of the material and the characteristics of the laser (in particular power, wavelength, repetition frequency, width and shape of pulses) .
- the absorbent layer (s) of a multilayer structure can be selectively annealed by light irradiation, in particular by laser, to modify the physical or chemical characteristics of certain layers directly irradiated by the laser.
- annealing difficulties arise in certain cases, in particular when a layer to be annealed is little or not absorbent, or even when there is no laser having emission lines in the length ranges d wave for which the layer to be annealed is absorbent. In fact, the emission wavelengths of the lasers are discrete and those which an industrialist may have do not necessarily cover the spectral range of interest. Another problem arises when an area or a layer, which would be absorbent or for which there could be an available wavelength, would however exhibit poor or insufficient resistance to light flux.
- the invention relates to an annealing process or a process for modifying a characteristic, for example a characteristic, by thermal effect. physical or chemical, from a first zone in a first material, process in which a laser beam is directed towards a second zone in a second material, the diffusion of the thermal energy from the second towards the first zone allowing the modification by effect thermal or annealing thereof.
- a characteristic for example a characteristic, by thermal effect.
- physical or chemical from a first zone in a first material, process in which a laser beam is directed towards a second zone in a second material, the diffusion of the thermal energy from the second towards the first zone allowing the modification by effect thermal or annealing thereof.
- Each of the materials may include one or more types of atoms or molecules, and may for example be an alloy or a composite material.
- the invention uses, near or in the vicinity of or in contact with the zone to be annealed, which is for example in the form of a thin layer, another zone, for example also in the form of a
- the absorbent zone will heat up and, by heat transfer, cause the temperature in the zone to be annealed to rise.
- the temperature rise may be greater than 100 ° C or several hundred degrees C, for example greater than 500 ° C or 1000 ° C.
- the second zone has, for example, an absorption on light irradiation greater than that of the first zone.
- the second material will preferably be chosen for its thermal diffusion properties: it will be preferable to have a material that can best transfer, and in particular to the first zone, the heat generated by the laser.
- the two zones may or may not be in contact with each other. For example, they can be made up of two neighboring portions of the same layer or even by two neighboring zones of a solid material.
- the first material is SrTi ⁇ 3 and the second of metal, for example platinum.
- the invention also relates to a system of materials or a heterogeneous assembly or a heterogeneous system of materials comprising: - a first zone made of a first material, having a physical and / or chemical characteristic capable of being thermally modified, - a second zone in a second material, for absorbing at least part of a laser radiation at a wavelength, and for transferring at least a part of thermal energy resulting from this absorption towards the first zone.
- FIG. 1 represents a first embodiment of the invention.
- a layer 2 allows absorption of a laser beam 10 and a transfer of heat to neighboring areas or layers, and in particular to a layer 4 to be annealed or the characteristic of which it is desired to modify.
- the assembly also rests on a substrate 6.
- a laser beam 10 is directed towards the layer 2 or focused in this layer 2, the reference 12 designating the laser impact, that is to say the zone where most of the laser energy is absorbed.
- the reference 12 designating the laser impact, that is to say the zone where most of the laser energy is absorbed.
- thermal diffusion a zone 14 around the impact 12 is heated. The heating, or thermal energy, will therefore partially diffuse from zone 2, towards zone 4 which can receive or is able to receive this thermal energy.
- a physical, chemical or structural characteristic of this zone 4 is thereby modified, at least locally in zone 4, a modification which persists or which is durable or permanent even after the laser beam has been stopped.
- the physical or chemical characteristics of the material of zone 4 which one seeks to modify with this technique are, for example, one or more optical and / or electrical and / or magnetic and / or thermal, and / or crystalline or amorphous characteristics. , and / or its chemical composition (as in the case of diffusion by annealing of dopants).
- the duration of irradiation by the laser will depend on the desired transformation, the absorption of layer 2, its heat diffusion properties (coefficient of thermal conductivity) towards layer 4 and the heat absorption capacities. and the heating of this layer 4.
- the transfer of heat to the zone to be annealed will depend on the temperature reached in the zone which absorbs the radiation, and on the thermal constants of the latter as well as of the zone to annealing.
- the absorption of a layer is linked to the absorption coefficient of the material of this layer and to its thickness.
- the irradiation can be carried out through a support of said zones, this support having to be transparent to at least part of the light irradiation.
- the thin layer 2 which absorbs the radiation can be produced by any type of deposition process, CVD, PVD or sol-gel for example.
- Another embodiment relates to the annealing of a material of the SrTi0 3 type.
- These materials are used as materials with high dielectric permittivity. They exhibit high dielectric constants when they are crystallized. Furthermore, the constraints imposed by the components in which these materials are integrated impose a process temperature below 450 ° C. However, these materials are amorphous when they are produced at temperatures typically below 600 ° C.
- the laser annealing which makes it possible to heat the layer of SrTi0 3 to the crystallization temperature, without heating the structures of the complete device, is in this respect interesting. In order to anneal these materials, it is possible to use a laser, for example based on triplicate YAG.
- This type of laser emits at wavelengths close to 350 nm.
- a layer of SrTi0 3 to be annealed has, at 350 nm, a very low absorption coefficient and the coupling of the energy of the laser pulse with this layer is weak.
- Simulations show that a 200 nm thick layer absorbs 3% of the energy, which does not allow the temperature in the material with high permittivity to be raised sufficiently. Simulations were carried out for a structure such as that of FIG. 2 and comprising a silicon substrate 20, a layer 22 of SiO 2, a layer 24 of Platinum and the layer 26 of material with a high dielectric constant K, for example in SrTi0 3 .
- the platinum 24 which will play the role of absorbent layer and which will transfer to the material 26 part of the energy which it has absorbed. Simulations of temperature rises in this structure were made, in the case of the impact of a laser pulse of 30 ns at the wavelength of 350 nm. The fluence chosen for the simulations is 300 mJ / cm 2 . As we said, the material 26 is not very absorbent at 350nm (3% absorption in a 200nm layer); it is platinum 24 (Pt) which mainly absorbs light energy (88% absorption) and heats by conduction the material which is in contact with it. FIG.
- This figure shows that, under these irradiation conditions (pulse duration of 30 ns), it is possible to reach, over the entire thickness of the material 26, temperatures favorable to the crystallization of the material, for example between 700 and 800 ° vs.
- Figure 4 shows, for a laser pulse of 30ns duration and a fluence of 300mJ / cm 2 , thermal profiles plotted at different depth levels in layer 26: at the interface layer 26 - layer 24 (curve I), at middle of layer 26 (curve II) and at the interface layer 26 - air (layer
- SrTi03 has been given, but the invention also applies to the modification of materials of the “High K” type, or materials of high dielectric constant K, for example greater than 3 or 3.9 and less than 100 such as yttrium oxide (Y 2 O 3 ), aluminum (A1 2 0 3 ), zirconium oxide (Zr0 2 ), or Hafnium oxide (Hf ⁇ 2).
- materials of the “High K” type or materials of high dielectric constant K, for example greater than 3 or 3.9 and less than 100
- materials of the “High K” type for example greater than 3 or 3.9 and less than 100
- Other materials with a high constant K are for example PbZrTi0 3 , BaTi0 3r PbTi0 3r BaSrTi0 3 .
- the invention also applies to the annealing of solid materials comprising a zone to be annealed and a zone adjacent to or in contact with the zone to be annealed, this neighboring zone absorbing and diffusing, towards the zone to be annealed, light energy at the wavelength of a radiation source, in particular of the laser type. It also applies to the case of a layer comprising, as illustrated in FIG. 5, a first zone 30 which absorbs radiation 40 focused at point 42 and which will diffuse thermal energy towards a second zone 32, close to the first or in contact with it. This energy makes it possible to modify a characteristic of this second zone such as a physical or chemical characteristic already indicated above. These two zones are for example made of the same material, the zone 32 further having a particular doping.
- the annealing according to the invention can be used to crystallize amorphous materials (increase in dielectric permittivities in materials of the “High K” type for example). It can also allow elements to be broadcast in materials (dopants in materials used in microelectronics for example), or to locally modify the morphology of certain materials (for optical recordings of CD or DVD type). - If we take the example of Figure 1, the invention also applies to the case where the zone 4 could have an absorption at the wavelength of the beam 10 but would have insufficient resistance to the light flux. Here again, a variant would be to distribute the light flux over the two zones 2 and 4. Finally, the example was given of a beam 10 coming from a laser, but it may also be radiation from another type of source, including a consistent source.
- MIM capacities consisting of a substrate / metal / "high k" / metal material stack (the metal layers serving as electrical conductors in the capacity). These metal layers can be used directly to cause heating of the “high K” material, according to one of the embodiments described above of the process of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Recrystallisation Techniques (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0350562A FR2859820B1 (fr) | 2003-09-17 | 2003-09-17 | Structure multi-zones apte a subir un recuit par irradiation lumineuse et procede de mise en oeuvre de ladite structure |
| PCT/FR2004/050430 WO2005027209A2 (fr) | 2003-09-17 | 2004-09-14 | Structure multi-zones apte a subir un recuit par irradiation lumineuse et procede de mise en oeuvre de ladite structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1665351A2 true EP1665351A2 (fr) | 2006-06-07 |
Family
ID=34203558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04816130A Withdrawn EP1665351A2 (fr) | 2003-09-17 | 2004-09-14 | Structure multi-zones apte a subir un recuit par irradiation lumineuse et procede de mise en oeuvre de ladite structure |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20070036994A1 (fr) |
| EP (1) | EP1665351A2 (fr) |
| FR (1) | FR2859820B1 (fr) |
| WO (1) | WO2005027209A2 (fr) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2921752B1 (fr) * | 2007-10-01 | 2009-11-13 | Aplinov | Procede de chauffage d'une plaque par un flux lumineux. |
| US8586398B2 (en) * | 2008-01-18 | 2013-11-19 | Miasole | Sodium-incorporation in solar cell substrates and contacts |
| US8536054B2 (en) * | 2008-01-18 | 2013-09-17 | Miasole | Laser polishing of a solar cell substrate |
| US8546172B2 (en) | 2008-01-18 | 2013-10-01 | Miasole | Laser polishing of a back contact of a solar cell |
| FR2938116B1 (fr) * | 2008-11-04 | 2011-03-11 | Aplinov | Procede et dispositif de chauffage d'une couche d'une plaque par amorcage et flux lumineux. |
| US9859121B2 (en) * | 2015-06-29 | 2018-01-02 | International Business Machines Corporation | Multiple nanosecond laser pulse anneal processes and resultant semiconductor structure |
| WO2020212736A1 (fr) * | 2019-04-17 | 2020-10-22 | Arcelormittal | Procédé de fabrication d'un ensemble par soudage au laser |
| WO2020212735A1 (fr) | 2019-04-17 | 2020-10-22 | Arcelormittal | Procédé de fabrication d'un ensemble par soudage à l'arc submergé (saw) |
| WO2020212737A1 (fr) * | 2019-04-17 | 2020-10-22 | Arcelormittal | Procédé de fabrication d'un substrat métallique revêtu par dépôt de métal au laser |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437139A (en) * | 1982-12-17 | 1984-03-13 | International Business Machines Corporation | Laser annealed dielectric for dual dielectric capacitor |
| JPH073908B2 (ja) * | 1987-07-16 | 1995-01-18 | 三菱電機株式会社 | 半導体発光装置の製造方法 |
| JPH0241785A (ja) * | 1988-08-02 | 1990-02-09 | Toyo Seikan Kaisha Ltd | レーザマーキング部材 |
| GB9206086D0 (en) * | 1992-03-20 | 1992-05-06 | Philips Electronics Uk Ltd | Manufacturing electronic devices comprising,e.g.tfts and mims |
| JP3108797B2 (ja) * | 1992-10-26 | 2000-11-13 | 富士通株式会社 | 高誘電率誘電体薄膜の製造方法 |
| US5756369A (en) * | 1996-07-11 | 1998-05-26 | Lsi Logic Corporation | Rapid thermal processing using a narrowband infrared source and feedback |
| US6380044B1 (en) * | 2000-04-12 | 2002-04-30 | Ultratech Stepper, Inc. | High-speed semiconductor transistor and selective absorption process forming same |
| US6635541B1 (en) * | 2000-09-11 | 2003-10-21 | Ultratech Stepper, Inc. | Method for annealing using partial absorber layer exposed to radiant energy and article made with partial absorber layer |
-
2003
- 2003-09-17 FR FR0350562A patent/FR2859820B1/fr not_active Expired - Fee Related
-
2004
- 2004-09-14 US US10/571,128 patent/US20070036994A1/en not_active Abandoned
- 2004-09-14 EP EP04816130A patent/EP1665351A2/fr not_active Withdrawn
- 2004-09-14 WO PCT/FR2004/050430 patent/WO2005027209A2/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005027209A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2859820A1 (fr) | 2005-03-18 |
| WO2005027209A3 (fr) | 2005-12-08 |
| WO2005027209A2 (fr) | 2005-03-24 |
| FR2859820B1 (fr) | 2006-06-09 |
| US20070036994A1 (en) | 2007-02-15 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20060316 |
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| AK | Designated contracting states |
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| AX | Request for extension of the european patent |
Extension state: AL HR LT LV MK |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HYOT, BERANGERE Inventor name: HUE, JEAN Inventor name: ANDRE, BERNARD |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE |
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| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20080922 |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20130403 |