EP1652231A1 - Dispositif comprenant au moins une source thermique formee par un element fonctionnel a refroidir, au moins un puits thermique et au moins une couche intermediaire en matiere thermoconductrice entre la source thermique et le puits thermique, ainsi que matiere thermoconductrice a utiliser notamment dans un tel dispositif - Google Patents

Dispositif comprenant au moins une source thermique formee par un element fonctionnel a refroidir, au moins un puits thermique et au moins une couche intermediaire en matiere thermoconductrice entre la source thermique et le puits thermique, ainsi que matiere thermoconductrice a utiliser notamment dans un tel dispositif

Info

Publication number
EP1652231A1
EP1652231A1 EP04738584A EP04738584A EP1652231A1 EP 1652231 A1 EP1652231 A1 EP 1652231A1 EP 04738584 A EP04738584 A EP 04738584A EP 04738584 A EP04738584 A EP 04738584A EP 1652231 A1 EP1652231 A1 EP 1652231A1
Authority
EP
European Patent Office
Prior art keywords
nanofibers
organic matrix
thermally conductive
heat
conductive composition
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Withdrawn
Application number
EP04738584A
Other languages
German (de)
English (en)
Inventor
Jürgen SCHULZ-HARDER
Ernst Hammel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rogers Germany GmbH
Original Assignee
Electrovac AG
Curamik Electronics GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electrovac AG, Curamik Electronics GmbH filed Critical Electrovac AG
Publication of EP1652231A1 publication Critical patent/EP1652231A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
    • H01L23/3737—Organic materials with or without a thermoconductive filler
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L24/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
    • H01L24/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
    • H01L2224/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
    • H01L2224/29001—Core members of the layer connector
    • H01L2224/29099—Material
    • H01L2224/29198—Material with a principal constituent of the material being a combination of two or more materials in the form of a matrix with a filler, i.e. being a hybrid material, e.g. segmented structures, foams
    • H01L2224/29199—Material of the matrix
    • H01L2224/2929—Material of the matrix with a principal constituent of the material being a polymer, e.g. polyester, phenolic based polymer, epoxy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
    • H01L2224/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
    • H01L2224/29001—Core members of the layer connector
    • H01L2224/29099—Material
    • H01L2224/29198—Material with a principal constituent of the material being a combination of two or more materials in the form of a matrix with a filler, i.e. being a hybrid material, e.g. segmented structures, foams
    • H01L2224/29298—Fillers
    • H01L2224/29299—Base material
    • H01L2224/29393—Base material with a principal constituent of the material being a solid not provided for in groups H01L2224/293 - H01L2224/29391, e.g. allotropes of carbon, fullerene, graphite, carbon-nanotubes, diamond
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
    • H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
    • H01L2224/321—Disposition
    • H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/32245—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • 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
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/13—Discrete devices, e.g. 3 terminal devices
    • H01L2924/1301—Thyristor
    • 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
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/13—Discrete devices, e.g. 3 terminal devices
    • H01L2924/1301—Thyristor
    • H01L2924/13034—Silicon Controlled Rectifier [SCR]
    • 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
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/13—Discrete devices, e.g. 3 terminal devices
    • H01L2924/1304—Transistor
    • H01L2924/1306—Field-effect transistor [FET]
    • H01L2924/13091—Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
    • 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
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/14—Integrated circuits
    • 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
    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
    • H01L2924/151—Die mounting substrate
    • H01L2924/156—Material
    • H01L2924/15786—Material with a principal constituent of the material being a non metallic, non metalloid inorganic material
    • H01L2924/15787—Ceramics, e.g. crystalline carbides, nitrides or oxides
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/0058—Laminating printed circuit boards onto other substrates, e.g. metallic substrates
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • 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
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Definitions

  • Heat source and the heat sink and thermal conductive mass in particular
  • the invention relates to an arrangement or device according to the preamble of claim 1 and to a thermally conductive mass for the intermediate layer of such a device according to the preamble of claim 36.
  • Heat source in the sense of the invention is generally to be understood as a part of the device or arrangement which contains at least one heat-generating functional element, for example a corresponding component or a group of components.
  • heat source in the sense of the invention is in particular an electrical or to understand electronic component, a group of several such components, an integrated circuit or else an electrical or electronic circuit that contains one or more such components, integrated circuits, etc.
  • heat sink is generally to be understood as a part of the device or arrangement according to the invention to which the heat from the heat source, for example for cooling, is to be transferred as optimally as possible.
  • heat sink in the sense of the invention also includes To understand part of the arrangement according to the invention, which is used to cool the electrical or electronic components.
  • Thermally conductive mass in the sense of the invention is to be understood in particular as a material in the liquid, viscous, pasty or solid state which, as an intermediate layer between the heat source and the heat sink, ensures optimal heat transfer over as large an area as possible, even if the Corresponding surfaces intended for heat transfer (heat transfer surfaces) between the heat source and the heat sink, for example due to production, are not completely flat and / or are not significantly roughness.
  • the temperature change leads according to a knowledge on which the invention is based at the transition between the heat source (component, circuit or module) and the heat sink apparently to a mechanical pump effect, with the effect that the thermal paste, in particular also the components causing the thermal conductivity of this paste, increasingly in a reduced area, for example in the edge area of the heat transfer surfaces between the heat source and the heat sink are concentrated so that there is a sharp reduction in the area actually available for heat transfer and thus a deterioration in the cooling effect.
  • the object of the invention is to show an arrangement which avoids these disadvantages and enables stable heat transfer between a heat source and a heat sink even over a long operating period.
  • a thermally conductive mass which is particularly suitable for the intermediate layer of the arrangement according to the invention, is designed in accordance with claim 36.
  • the intermediate layer or the thermally conductive mass of this intermediate layer present between the heat source and the heat sink has a high thermal conductivity. Furthermore, due to the use of the nanofibers, this intermediate layer is stable even over a long operating time, that is to say, especially in the case of frequent temperature changes in the region of this intermediate layer, there is no, or at least no noticeable Change this layer. According to one finding on which the invention is based, the nanofibers therefore also have a stabilizing effect on the intermediate layer.
  • Fig. 1 shows the basic structure of a simplified schematic representation
  • FIG. 2 shows a schematic representation of a device for testing the thermal conductivity of the intermediate layer used in the device according to the invention or of the material used for this intermediate layer (thermal paste);
  • Fig. 3 is a graphical representation of the change in temperature of a sample heated by the intermediate layer according to the invention, together with the temperature profile in comparative measurements.
  • Fig. 4-6 in an enlarged view, the intermediate layer in the device according to Figure 1 between the heat source and the heat sink, namely in different embodiments of the invention; Fig. 7 - 1 1 different versions of a device according to the invention.
  • 1 is a heat source, the thermal energy of which is via a
  • Heat sink 2 is to be derived.
  • the heat source 1 is, for example, an electrical or electronic component, preferably an electrical or electronic power component, for example a semiconductor component, such as a transistor, mosfet, diode, also laser diode, integrated circuit, thyristor, laser diode or the like, or else an electrical or electronic Circuit (also module), which has one or more electrical or electronic components that generate power loss during operation and must therefore be cooled.
  • the heat sink 2 can also be designed in any way, in such a way that it is suitable for dissipating the thermal power supplied by the heat source 1.
  • the heat source 1 and heat sink 2 are connected to one another in a suitable manner, so that they are directly adjacent to one another on two essentially planar surface sides 1.1 and 2.1 (heat transfer surfaces).
  • the heat source 1 and the heat sink 2 are screwed together or else connected and braced in another way.
  • an intermediate layer or layer 3 made of a material with a high thermal conductivity is provided between the heat source 1 and the heat sink 2.
  • the intermediate layer 3 or the material forming this intermediate layer are selected such that, at least in the operation of the heat-generating components, it creates a heat-conducting connection with low resistance between the heat source 1 and the heat sink 2, even in the region of unevenness in the heat transfer surfaces.
  • the thickness of the intermediate layer 3 is chosen to be as small as possible, for example in such a way that this intermediate layer 3
  • Unevenness of the surface sides 1.1 and 2.1 are just equalized or compensated.
  • the thickness of the intermediate layer 3 is in the range between 0.01 and 0.5 mm.
  • the material used for the intermediate layer 3 consists of at least one organic component as a matrix and of this organic one Component of embedded carbon nanofibers, which can be in a wide variety of forms, for example single-walled nanotubes as double-walled or multiple-walled nanotubes or in another form, for example those with herringbone-like surface structures, which ensure optimal integration into the organic matrix.
  • the nanofibers have a length in the range between 1 and 100 ⁇ m and a thickness in the range from approximately 1.3 nm to 300 nm, the ratio of length to thickness being at least 10.
  • at least a large part of the nanofibers embedded in the organic matrix has a length greater than 10 ⁇ m.
  • the length of the nanofibers for example, is randomly oriented in the intermediate layer.
  • the proportion of nanofibers in the organic matrix is in the range between 1 to 70 percent by weight based on the total weight of the material or the thermally conductive composition, with a proportion between 5 and 20 percent by weight having very good properties, in particular also with regard to thermal conductivity and stability can be achieved.
  • a major advantage of the intermediate layer 3 is that a stable structure for the intermediate layer is achieved through the use of the nanofibers, ie even if the organic matrix is in the liquid or pasty state at least during the operation of the heat source 1, the remains Intermediate layer 3 forming mass remains stable, ie a separation or displacement of the nanofibers, for example, from the middle of the surface sides 1 .1 and 2.1 at their edge area, etc., as is the case, for example, with known thermal pastes, in particular at changing temperatures on the Heat source is observed does not occur. This is obviously due to the fact that the nanofibers hold or fixate each other in the matrix, but also possibly other additives or components added to the organic matrix.
  • oils such as e.g. Silicone oil.
  • the organic matrix i.a. also substances or mixtures of substances that are at least in one
  • Temperature range which the heat source 1 has during its operation i.e. is liquid in a temperature range of about 40 to 80 °.
  • the following are suitable as the organic matrix: Waxes or thermoplastics.
  • the heat source 1 and the heat sink 2 are pressed against one another via the intermediate layer 3, specifically with a surface pressure in the range between approximately 0.1 to 100 bar.
  • the use of carbon or carbon nanofibers in the organic matrix has the advantage that a high thermal conductivity is achieved for the intermediate layer 3.
  • the material used for the intermediate layer 3 also has electrically insulating properties, in spite of a thermal conductivity that approximately corresponds to the thermal conductivity of aluminum.
  • elastomeric organic compounds can be used as the matrix component, for example elastomeric plastics, such as, for example, silicone rubber, or else polymers, for example polycarbonate, polypropylene, polyethylene, etc.
  • elastomeric plastics such as, for example, silicone rubber
  • polymers for example polycarbonate, polypropylene, polyethylene, etc.
  • the use of a matrix made of an elastomeric material has the advantage that 3 changes in the contact pressure P can be compensated for at least within certain limits by the elastic formation of the intermediate layer such that the intermediate layer 3 always within both limits against both
  • the experimental arrangement shown in FIG. 2 essentially consists of two square plates 5.1 and 5.2 made of metal, namely aluminum.
  • the two plates each have an edge length of 5 cm and a thickness of 0.2 cm and are provided parallel to one another and spaced apart, with a gap 6 of 150 ⁇ m.
  • An electrical heating device 5.3 is provided on the surface side of the plate 5.1 facing away from the plate 5.2, with a power of 1.2 watts.
  • the plate 5.2 is blackened on its surface side facing away from the plate 5.1, in such a way that the temperature of the plate 5.2 can be measured without contact using an infrared camera 7.
  • FIG. 3 shows the time course of the temperature measured with the infrared camera 7, specifically with the curve a there for the case of an air gap 6 of 150 between the two plates 5.1 and 5.2, with curve b for the case that the gap 6 is filled with pure aluminum, and with curve c for the case that the gap 6 is bridged with the material of the intermediate layer 3, ie with a paste consisting of the organic matrix of silicone oil with a proportion of carbon nanofibers of 10 percent by weight.
  • the curve c has a marked approximation to curve b and also runs clearly above curve a, which confirms the advantageous high thermal conductivity coefficient of the mass consisting of the organic matrix and the nanofibers.
  • the mass forming the intermediate layer 3 consists only of the organic matrix and the added nanofibers.
  • Other components or additives are conceivable, for example heat-conducting ceramics in powder form, for example Al 2 O 3 , Aln, BN, Si 3 N 4 SiC, BeO, ZrO, etc. are conceivable.
  • further additions or components are possible, for example in the form of metal particles, such as those made of silver, copper, gold or alloys of these metals.
  • metal particles or particles made of metal alloys can also be used as additives, which (particles) change into the molten state at temperatures above 50 ° C.
  • the nanofibers contained in the organic matrix are at least partially with at least one metal or one Coated metal alloy, for example electrically or electrolytically and / or chemically.
  • FIG. 4 again shows the intermediate layer 3 consisting of the organic matrix and those embedded in this matrix in an enlarged partial representation
  • Nanofibers 8 and possibly other additives or components are shown in such a way that they are embedded or crumpled in the matrix.
  • FIG. 5 shows, in a representation like FIG. 4, the intermediate layer 3 in a further possible embodiment.
  • the nanofibers 8 are oriented at least for the most part with their longitudinal extension perpendicular or approximately perpendicular to the surface sides 1.1 and 2.1.
  • an electrical voltage for example the voltage of a DC voltage source 9
  • the voltage is chosen so that there is an electrical field strength of about 1 volt per ⁇ m within the intermediate layer 3.
  • the thermal conductivity of the intermediate layer 3 is significantly improved by the alignment of the nanofibers 8.
  • the voltage applied also results in additional stabilization. In a practical embodiment, this low electric field strength within the intermediate layer 3 can e.g. be easily realized by a corresponding potential difference between the heat source 1 and the heat sink 2.
  • FIG. 6 shows a further embodiment in a representation similar to FIG.
  • the nanofibers embedded in the organic matrix can at least for the most part also be connected to one another to form a two- or three-dimensional structure, for example in a type of fabric or a nonwoven material (fleece) or else in a three-dimensional one porous structure or a three-dimensional network or lattice.
  • FIG. 7 again shows a schematic representation of a device according to the invention with the heat source 1 and a heat sink 2a, which is formed by a cooling element or passive cooler 10 with a large number of cooling fins or pins or pin-like projections on the side facing away from the heat source 1 is.
  • the cooler 10 is arranged to dissipate the heat in the air stream of a blower or fan 1 1.
  • FIG. 8 shows the device according to the invention with a heat sink formed by an active cooler 12.
  • the active cooler 12 is, for example, a micro cooler, as is e.g. is described in DE 197 10 783 A1.
  • This cooler 12 is flowed through by a cooling medium, for example water or a cooling medium containing water, and is arranged for this purpose in a coolant circuit which has a circulating pump 13, an external recooler 14 with blower 15 and a compensating or collecting container 16 for the cooling medium.
  • a cooling medium for example water or a cooling medium containing water
  • FIG. 9 shows an embodiment of the device according to the invention, in which the heat sink is formed by a heat pipe 16.
  • this heat pipe 17 has a cooling medium that can be evaporated by heating, for example alcohol or another evaporable organic medium.
  • at least two parallel flow paths are provided in the closed, elongated housing are connected to one another at least at the two ends of the housing, specifically a channel-like flow path for the evaporated cooling medium and a capillary-like flow path for the liquid phase of the cooling medium.
  • the heat source 1 is connected via the intermediate layer 3.
  • a cooler 18 for example having a plurality of cooling fins or corresponding projections or pins, which is arranged in the air flow of a blower 19.
  • FIG. 10 shows a further possible embodiment of a device according to the invention, in which the heat sink 2 is formed by a heat pipe 20 serving as a heat spreader and by a cooler 21 corresponding to the cooler 10.
  • the cooler 21 is in turn in the air flow of a blower, not shown, or else the cooler 21 is corresponding to the cooler 12 as active, i.e. coolant through which a coolant flows, for example in the form of a microcooler.
  • the mode of operation of the heat pipe 20 corresponds to that of the heat pipe 17, but with that
  • the area where the heat source 1 is provided is located in the middle of the housing of the heat pipe 20, that is to say it is symmetrical at least with respect to a plane oriented perpendicular to the surface side 1.1 of the heat source 1.
  • FIG. 1 1 shows an embodiment in which an electronic circuit 23 produced using a ceramic-metal substrate, preferably a copper-ceramic substrate, is provided on the heat sink, which is generally designated 2 in this figure.
  • the substrate 22 consists, in a manner known per se, of a ceramic layer, for example of an aluminum oxide or aluminum nitride ceramic, and is e.g. provided with the likewise known DCB or active soldering process with a metallization formed by a metal foil, for example copper foil.
  • the upper metallization 22.2 is structured in conductor tracks, contact areas, etc.
  • the power component 24 is also attached to this metallization, for example by soldering.
  • the lower metallization 22.3 is used for heat spreading and cooling and is connected via the intermediate layer 3 to the heat sink 2, which in turn can be designed as desired and according to the respective application, for example also in a manner as described above in connection with FIGS. 7-10 has been described.

Abstract

L'invention concerne un nouveau dispositif comprenant une source thermique formée, par exemple, par au moins un composant électrique ou électronique ou présentant un tel composant, comprenant un puits thermique et comprenant une couche intermédiaire en matériau thermoconducteur, placée entre la source thermique et le puits thermique. Le matériau thermoconducteur est constitué d'une matrice organique à nanofibres incorporées.
EP04738584A 2003-06-17 2004-06-02 Dispositif comprenant au moins une source thermique formee par un element fonctionnel a refroidir, au moins un puits thermique et au moins une couche intermediaire en matiere thermoconductrice entre la source thermique et le puits thermique, ainsi que matiere thermoconductrice a utiliser notamment dans un tel dispositif Withdrawn EP1652231A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003127530 DE10327530A1 (de) 2003-06-17 2003-06-17 Vorrichtung mit wenigstens einer von einem zu kühlenden Funktionselement gebildeten Wärmequelle, mit wenigstens einer Wärmesenke und mit wenigstens einer Zwischenlage aus einer thermischen leitenden Masse zwischen der Wärmequelle und der Wärmesenke sowie thermische leitende Masse, insbesondere zur Verwendung bei einer solchen Vorrichtung
PCT/DE2004/001115 WO2004114404A1 (fr) 2003-06-17 2004-06-02 Dispositif comprenant au moins une source thermique formee par un element fonctionnel a refroidir, au moins un puits thermique et au moins une couche intermediaire en matiere thermoconductrice entre la source thermique et le puits thermique, ainsi que matiere thermoconductrice a utiliser notamment dans un tel dispositif

Publications (1)

Publication Number Publication Date
EP1652231A1 true EP1652231A1 (fr) 2006-05-03

Family

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JP2006527912A (ja) 2006-12-07
DE10327530A1 (de) 2005-01-20
WO2004114404A1 (fr) 2004-12-29
CN1813348B (zh) 2011-01-12
US20070091572A1 (en) 2007-04-26
CN1813348A (zh) 2006-08-02
US7800908B2 (en) 2010-09-21
JP4711956B2 (ja) 2011-06-29

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