EP3216038A1 - Ultrakompakter mikrokondensator und verfahren zu seiner herstellung - Google Patents
Ultrakompakter mikrokondensator und verfahren zu seiner herstellungInfo
- Publication number
- EP3216038A1 EP3216038A1 EP15807607.5A EP15807607A EP3216038A1 EP 3216038 A1 EP3216038 A1 EP 3216038A1 EP 15807607 A EP15807607 A EP 15807607A EP 3216038 A1 EP3216038 A1 EP 3216038A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- water
- dielectric
- layers
- ultra
- 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- Withdrawn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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/10—Metal-oxide dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1272—Semiconductive ceramic capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
- H01G4/308—Stacked capacitors made by transfer techniques
Definitions
- the present invention relates to the fields of physics, materials science, and micro- and nanoelectronics, and relates to ultra-compact microcapacitors, such as may be used in electrical and electronic devices, and to a method of making these ultra-compact microcapacitors.
- Capacitors can be found in almost all electrical and electronic devices.
- the area of the electrically conductive layer is important. The larger this area, the greater the electrical capacity.
- capacitors are installed as electrical components in electrical or electronic devices. The required construction area should therefore be as low as possible. The smaller this construction area, the smaller the electrical or electronic device can be built.
- layers are applied to a substrate and subsequently rolled up.
- the mechanism of reeling can be realized by applying the layers in a state of tension and then relaxing or by applying and then removing a sacrificial layer.
- the plasma or wet-chemical etching of a silicon substrate is known, so that the taut, two-dimensional structure structured thereon is rolled up and formed into a three-dimensional structure.
- layer structures are also known which are arranged on a sacrificial layer and are rolled up by removing the sacrificial layer.
- the speed at which the sacrificial layer can be undercut and the strained layer separates from the substrate is a maximum of ⁇ ⁇ ⁇ / h [C.C.B. Bufon et al., Nano Letters, 2010, 10, 2506-2510].
- a method for the production of capacitors in which a layer structure is rolled up by oxidation of a sacrificial layer.
- a hydrogel may also be used, which is brought into contact with water, thereby absorbing the water, swells and leads to the rolling up of the layer stack.
- a disadvantage of the known state of the art is that the production of coiled capacitors requires a comparatively long duration for the reeling process.
- the removal of the materials used for the sacrificial layer must be done by means of etching.
- dilute hydrogen peroxide which is harmful to human skin and a bleaching agent, is used as the etching medium. When exposed for a long time, it has a corrosive effect on metal layers and is therefore a major disadvantage for long rolling times.
- Another disadvantage is the large construction area required for capacitors and the still insufficient capacity of capacitors.
- the object of the present invention is to provide an ultra-compact microcapacitor having the highest possible capacity and specifying a cost-effective, environmentally friendly and time-saving method for producing such an ultra-compact microcapacitor.
- the ultra-compact microcapacitor according to the invention consists of a rolled-up layer stack of alternately arranged layers of dielectric and / or electrically insulating and electrically conductive materials with roll-up lengths of the layer stack of at least 1 mm and an absolute electrical storage capacity of at least 10 nF.
- the capacitor has an absolute electrical storage capacity between 0.05 and 1 F.
- the rolled-up layer stack has dimensions of 10 to 100 ⁇ diameter.
- the layer stack comprises a layer of at least one dielectric and / or electrically insulating material, a layer of at least one first electrically conductive material, a further layer of at least one dielectric and / or electrically insulating material and a layer of at least one second electrically conductive material and wherein the layers of the dielectric and / or electrically insulating material, the layers of the electrically conductive material substantially completely covered, wherein still advantageously further layers of the dielectric and / or electrically insulating material and layers of the electrically conductive material are arranged alternately one above the other.
- At least one layer containing a water-soluble cellulose derivative and / or a layer containing a water-soluble polymer are applied to a substrate,
- a layer of at least one dielectric and / or electrically insulating material thereon a layer of at least a first electrically conductive material, thereon a layer of at least one dielectric and / or electrically insulating material, thereon a layer of at least one second electrically conductive material and a layer of at least one dielectric and / or electrically insulating material is arranged thereon,
- the layer stack is rolled up at a winding speed of more than 0.1 mm / min.
- methylcellulose is used as the water-soluble cellulose derivative.
- polyvinyl alcohol and / or polyacrylic acid as the water-soluble polymer.
- the other layer materials of the layer stack are partially removed at least at a portion of this layer, wherein advantageously the partial removal of the layer materials of the layer stack by means of an HF or a dilute HF solution or mechanically realized.
- AIO x advantageously Al 2 O 3, SiO x , advantageously S1O 2, AITiO x , SiTiO x , HfO x , TaO x , ZrO x , HfSiO x , ZrSiO x , TiZrO x , TiZrWO x , TiO x , SrTiO x , PbTiO x , SiAIO x , metal nitrides, aluminum nitrides AIN y , silicon nitrides SiN y , AIScN y , metal oxynitrides, aluminum oxynitrides AIO x N y , silicon oxynitrides SiO x N y , HfSiO x N y and / or SiC z O x N y is used. It is
- microcapacitors which are ultra-compact, while having a high capacity and being produced by a method which is cost-effective, environmentally friendly, time-saving and material-saving.
- ultra-compact microcapacitors consist of a rolled-up layer stack of alternating layers of dielectric and / or electrically insulating and electrically conductive materials with Aufrollin the layer stack of 0.5 mm to 30 mm. Due to the large Aufrollin the ultra-compact microcapacitors of the invention achieve an absolute electrical storage capacity of at least 50 nF.
- the ultra-compact microcapacitors according to the invention can be arranged by their rolled-up construction on a very small construction area on an electronic or electrical component and thus have a per cm 2 construction area comparatively very high electrical storage capacity.
- capacitors in the micro-scale or nanoscale order of magnitude which have a large absolute electrical storage capacity and at the same time a small construction area, are to be regarded as ultra-compact microcondensers.
- the construction area according to the invention is the necessary area on an electrical or electronic component, for example on a circuit board in an electrical or electronic device, to which the micro-capacitor is arranged.
- the ultra-compact microcapacitors according to the invention are inexpensively, environmentally friendly, time-saving and gentle to materials by a process in which at least one layer containing a water-soluble cellulose derivative and / or a layer containing a water-soluble polymer is applied to a substrate as a sacrificial layer.
- These layers are substantially, as completely as possible, so completely covering each other applied to each other.
- the sacrificial layer is substantially completely or completely removed from the substrate by means of water and / or an organic solvent and / or an organic solvent mixture, and the layer stack is rolled up at a winding speed of at least or more than 0.1 mm / min.
- the layers are rolled up.
- the particular advantage of the invention is that no highly corrosive etching medium must be used for removing the sacrificial layer, but either very little water or very little very dilute solvent / solvent mixture (in the range ml / l water / organic solvent) and thus the rolling up of the layers is triggered.
- the other layer materials of the layer stack for example mechanically or by applying an HF or a dilute HF solution to the respective site, partially removed and thus the access of the rolling medium water and / or the organic solvent and / or the organic solvent mixture is ensured to the sacrificial layer.
- the deposition of the layers is preferably carried out by means of atomic layer deposition (ALD), chemical vapor deposition (CVD) or physical vapor deposition.
- a layer of methylcellulose with a concentration of 1 mg / ml of water in a centrifuge is completely covered on a silicon substrate with a 1 ⁇ m thick thermal silicon dioxide layer spun at a speed of 4500 rpm and then baked on a hot plate at 120 ° C for 5 minutes and dried.
- This methylcellulose layer typically below 5 nm in thickness, is the sacrificial layer.
- a 1 1 nm thick Al 2 O 3 layer is completely deposited at 150 ° C. covering the methylcellulose layer.
- This dielectrically acting Al 2 O 3 layer also serves as an insulating layer between the two metallic electrodes after rolling up and for protecting the sacrificial layer from the following process steps and the humidity.
- the first electrode of the capacitor by electron beam evaporation is ever a strained electrically conductive layer consisting of 15 nm Ti and subsequently 20 nm Cr deposited at a rate of 0.1 nm / s.
- a second 1 1 nm thick Al 2 O 3 layer is again deposited by atomic layer deposition completely covering the electrically conductive layers at 150 ° C.
- the deposition of the second electrically conductive layer of 10 nm Cr follows at a rate of 0.1 nm / s.
- an area over the entire width of the layer stack is again marked by optical lithography at one of the narrow ends, in which the oxide covering the layer stack is removed by reactive ion etching for 5 min.
- An ultra-compact microcapacitor produced in this way has a diameter of 80 ⁇ as rolled-up layer stack, and an absolute electrical storage capacity of 0.2 F with a base area of 800 ⁇ 80 ⁇ 2 .
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Semiconductor Integrated Circuits (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014222535.3A DE102014222535B3 (de) | 2014-11-05 | 2014-11-05 | Verfahren zur Herstellung eines ultrakompakten Mikrokondensators und damit hergestellter Kondensator |
| PCT/EP2015/075822 WO2016071450A1 (de) | 2014-11-05 | 2015-11-05 | Ultrakompakter mikrokondensator und verfahren zu seiner herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3216038A1 true EP3216038A1 (de) | 2017-09-13 |
Family
ID=54838311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15807607.5A Withdrawn EP3216038A1 (de) | 2014-11-05 | 2015-11-05 | Ultrakompakter mikrokondensator und verfahren zu seiner herstellung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10153093B2 (de) |
| EP (1) | EP3216038A1 (de) |
| DE (1) | DE102014222535B3 (de) |
| WO (1) | WO2016071450A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016223029A1 (de) * | 2016-11-22 | 2018-05-24 | Leibniz-Institut Für Festkörper-Und Werkstoffforschung Dresden E.V. | Dreidimensionaler tomograf |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2047909B (en) * | 1978-12-25 | 1982-10-06 | Karpov V D | Dry film photoresist |
| DE10159415B4 (de) | 2001-12-04 | 2012-10-04 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Verfahren zur Herstellung einer Mikrospule und Mikrospule |
| ATE511195T1 (de) | 2007-08-07 | 2011-06-15 | Max Planck Gesellschaft | Verfahren zur herstellung eines kondensators und kondensator |
| US20120135237A1 (en) | 2009-04-28 | 2012-05-31 | The Johns Hopkins University | Self-assembly of lithographically patterned polyhedral nanostructures and formation of curving nanostructures |
-
2014
- 2014-11-05 DE DE102014222535.3A patent/DE102014222535B3/de active Active
-
2015
- 2015-11-05 US US15/524,461 patent/US10153093B2/en active Active
- 2015-11-05 WO PCT/EP2015/075822 patent/WO2016071450A1/de not_active Ceased
- 2015-11-05 EP EP15807607.5A patent/EP3216038A1/de not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| RAVIKANT SHARMA ET AL: "Large-Area Rolled-Up Nanomembrane Capacitor Arrays for Electrostatic Energy Storage", ADVANCED ENERGY MATERIALS, vol. 4, no. 9, 24 June 2014 (2014-06-24), DE, pages 1301631, XP055305768, ISSN: 1614-6832, DOI: 10.1002/aenm.201301631 * |
| See also references of WO2016071450A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016071450A1 (de) | 2016-05-12 |
| DE102014222535B3 (de) | 2016-03-17 |
| US10153093B2 (en) | 2018-12-11 |
| US20170358394A1 (en) | 2017-12-14 |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LEIBNIZ-INSTITUT FUER FESTKOERPER- UND WERKSTOFFFO Owner name: MURATA MANUFACTURING CO., LTD. |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SUZUKI, SHOICHIRO Inventor name: GRIMM, DANIEL Inventor name: BAUER, MARTIN Inventor name: SCHMIDT, OLIVER G. |
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