EP2695189A1 - Carte de circuits imprimés en céramique pourvue d'un dissipateur thermique en aluminium - Google Patents

Carte de circuits imprimés en céramique pourvue d'un dissipateur thermique en aluminium

Info

Publication number
EP2695189A1
EP2695189A1 EP12714276.8A EP12714276A EP2695189A1 EP 2695189 A1 EP2695189 A1 EP 2695189A1 EP 12714276 A EP12714276 A EP 12714276A EP 2695189 A1 EP2695189 A1 EP 2695189A1
Authority
EP
European Patent Office
Prior art keywords
circuit board
printed circuit
heat sink
soldered
metallization
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Withdrawn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
EP12714276.8A
Other languages
German (de)
English (en)
Inventor
Alexander Dohn
Alfred Thimm
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.)
Ceramtec GmbH
Original Assignee
Ceramtec 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 Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of EP2695189A1 publication Critical patent/EP2695189A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/80—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with pins or wires
    • 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
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • 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
    • H01L23/367—Cooling facilitated by shape of device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/508—Cooling arrangements characterised by the adaptation for cooling of specific components of electrical circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/86—Ceramics or glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • H01L23/367—Cooling facilitated by shape of device
    • H01L23/3677—Wire-like or pin-like cooling fins or heat sinks
    • 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
    • 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
    • H01L23/3735—Laminates or multilayers, e.g. direct bond copper ceramic substrates
    • 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
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • H05K1/0203—Cooling of mounted components
    • 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
    • H05K3/0061—Laminating printed circuit boards onto other substrates, e.g. metallic substrates onto a metallic substrate, e.g. a heat sink
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/64—Heat extraction or cooling elements
    • H01L33/642—Heat extraction or cooling elements characterized by the shape
    • 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
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]

Definitions

  • the invention relates to a printed circuit board made of ceramic with an upper side and a lower side, wherein sintered metallization regions are arranged on the upper side and the lower side is designed as a heat sink.
  • Such a ceramic circuit board is known from WO 2007/107601 A3.
  • the invention has the object to improve a printed circuit board made of ceramic according to the preamble of claim 1 so that.
  • the heat dissipation of components on the top of the circuit board is improved
  • this object is achieved in that also sintered metallization areas are arranged on the bottom on which a metallic heat sink is soldered. Due to the sintered metallization areas on the underside and the soldering of the metal heat sink, a particularly good heat dissipation is achieved from the top of the printed circuit board to the metallic heat sink.
  • solder preferably a refractory brazing alloy having a melting point between 450 and 660 ° C is achieved.
  • Metallic heat sinks have a high thermal conductivity.
  • the printed circuit board is made of aluminum oxide or aluminum nitride.
  • the circuit board is made of aluminum nitride, which has a particularly good thermal conductivity.
  • the metallic heat sink is made of aluminum.
  • Aluminum has a high thermal conductivity.
  • the metallic heat sink consists of a carrier plate with a connection side and an active side, and the heat sink with the connection side is soldered onto the metallization regions of the underside of the circuit board and has cooling elements projecting on the active side. By projecting cooling elements, the surface of the heat sink is increased and can radiate the heat introduced better.
  • the protruding cooling elements are a plurality of needles in the nature of a pin cushion.
  • the surface is extremely enlarged in a small space.
  • the top of the circuit board is concave or convex, whereby when using the circuit board as a lamp, the radiated light can be focused or scattered.
  • a method according to the invention for producing a printed circuit board is characterized in that a ceramic substrate pre-metallized on both sides by sintered metallization regions is produced, the metallization areas being gold, silver, silver alloys, active plating with galvanic coatings such as Ni + Au or thick-film aluminum or alternative methods such as Thin-film or plasma spraying is metallized and then the heat sink is soldered with its connection side on the underside of the circuit board, wherein as solder preferably a refractory brazing material with a melting point between 450 and 660 ° C is used.
  • soldering with brazing in the temperature range mentioned a necessary solid compound is achieved with good heat transfer performance. There is no clamping, screwing or gluing, as they have defects that are avoided when brazing with brazing.
  • the circuit board is used as a lamp or part of a lamp, wherein on the upper side of the printed circuit board LEDs are optionally soldered with associated circuit and / or electrical components.
  • the circuit may be covered for protection with an opaque lid.
  • the printed circuit board 2 has an upper 2a and a lower side 2b, wherein a soldered metallic heat sink 3 is arranged on the lower side 2b.
  • An essential feature of the invention is that both the upper side 2a and the lower side 2b are formed as ceramic circuit boards 2. This is achieved by applying sintered metallization regions on the upper side 2a and lower side 2b. Sintered metallization regions are described in WO 2007107601 A2. On the upper side 2a or on the localized metallization regions, components such as LEDs and / or a circuit can be soldered directly.
  • the advantage lies, inter alia, in the fact that the heat generated by the components is conducted directly into the ceramic of the printed circuit board 2 due to the high thermal conductivity.
  • the ceramic substrate preferably of AIN, pre-metallized on both sides by sintered metallization regions is metallized with gold, silver, silver alloys, active solder with galvanic coatings such as Ni + Au or with aluminum in thick film technology or alternative methods (thin film, plasma spraying, etc.) (base metallization). Both sides of the substrate can also be covered with different metallization.
  • the circuit board made of aluminum nitride, since in this case the thermal conductivity is extremely high.
  • a metallic heat sink 3 is soldered in a suitable geometry on the underside 2b of the ceramic circuit board 2 or on its base-metallized side.
  • the heat sink 3 is preferably made of aluminum (injection molding, cast part or the like).
  • the solder is preferably a refractory brazing material with a melting point between 450 and 660 ° C, the printed circuit board 2 on the base metallization and the braze with the metallic heat sink 3 firmly connects. There is no clamping, screwing or gluing.
  • the ceramic circuit board 2 which has both sides sintered Metallmaschines Kunststoffe and thus both sides of a board, or can be used, is on one side to the cooler side, i. towards the metallic heat sink 3, preferably flat.
  • the surface On the component side, i. on the top 2a where LEDs 6 are preferably arranged, the surface may also be convex or concave curved. As a result, when the components are LEDs 6, the light is scattered or bundled.
  • the braze used to braze the metallic heat sink 3 is preferably a commercially available aluminum brazing alloy (TMP aluminum brazing paste-39), as used to repair aluminum components, solid and good at 570 ° C.
  • thermally conductive over 50 W / mK
  • thermally conductive over 50 W / mK
  • the mounting side ie on the bottom 2b mechanically or chemically well cleaned (free of oxide) aluminum cooler 3 is connected.
  • the electrical components such as diodes, LEDs 6, transistors or similar. are then soldered with any other required components such as resistors or drivers with a soft solder in the temperature range at preferably 100-400 ° C in a second step on the top 2a of the pre-metallized ceramic circuit board 2. This creates a good heat transfer, especially for power components.
  • connection to the electrical network is preferably carried out by connector strips on the upper side 2a of the ceramic or via bonding wires from the ceramic to the outside.
  • LEDs 6 soldered
  • single or group lenses can be glued or soldered for protection or light scattering. Even opaque lid can serve to close the circuit.
  • the ceramic circuit board according to the invention can be used as a lamp or as part of a lamp.
  • FIG. 1 shows a printed circuit board 2 according to the invention with its top 2a and bottom 2b.
  • a metallic heat sink 3 is soldered aluminum.
  • the ceramic of the printed circuit board 2 is aluminum nitride.
  • the printed circuit board 2 is round in this example.
  • the sintered metallization areas are not visible in this figure.
  • the metallic heat sink 3 is made of aluminum and is formed like a pincushion, i. consists of a support plate 4, which is soldered onto the ceramic circuit board 2.
  • a plurality of protruding cylindrical needles 5 are arranged on the carrier plate 4.
  • FIG. 2 shows the upper side 2 a of the printed circuit board 2 according to FIG. 1.
  • the soldered electrical components are identified by the reference numeral 6.
  • the power lines are applied in thick film technology and marked with the reference numeral 7. These power lines 7 and the components 6 are soldered onto the sintered metallization regions. The metallization areas are not visible in the figure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Materials Engineering (AREA)
  • Power Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Led Device Packages (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Structure Of Printed Boards (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

L'invention concerne une carte de circuits imprimés (2) en céramique pourvue d'une face supérieure (2a) et d'une face inférieure (2b), des zones de métallisation frittées étant disposées sur la face supérieure (2a) et la face inférieure se présentant sous la forme d'un dissipateur thermique (3). L'objectif de l'invention est d'améliorer la dissipation thermique des composants sur la face supérieure de la carte de circuits imprimés. À cet effet, des zones de métallisation frittées sont disposées également sur la face inférieure (2b), un dissipateur thermique (3) métallique étant brasé sur ces zones de métallisation frittées.
EP12714276.8A 2011-04-04 2012-03-30 Carte de circuits imprimés en céramique pourvue d'un dissipateur thermique en aluminium Withdrawn EP2695189A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006726 2011-04-04
PCT/EP2012/055746 WO2012136579A1 (fr) 2011-04-04 2012-03-30 Carte de circuits imprimés en céramique pourvue d'un dissipateur thermique en aluminium

Publications (1)

Publication Number Publication Date
EP2695189A1 true EP2695189A1 (fr) 2014-02-12

Family

ID=45954642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12714276.8A Withdrawn EP2695189A1 (fr) 2011-04-04 2012-03-30 Carte de circuits imprimés en céramique pourvue d'un dissipateur thermique en aluminium

Country Status (10)

Country Link
US (1) US9730309B2 (fr)
EP (1) EP2695189A1 (fr)
JP (1) JP2014517497A (fr)
KR (1) KR20140034781A (fr)
CN (1) CN103563074B (fr)
BR (1) BR112013025429A2 (fr)
DE (1) DE102012205178A1 (fr)
RU (1) RU2013148615A (fr)
TW (1) TW201302046A (fr)
WO (1) WO2012136579A1 (fr)

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CN104486900A (zh) * 2014-11-07 2015-04-01 广东风华高新科技股份有限公司 用于电路板的支撑件及其制备方法
CN105305206B (zh) * 2015-11-03 2021-04-20 华中科技大学 一种适用于碟片激光器射流冲击冷却***的热沉
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Also Published As

Publication number Publication date
BR112013025429A2 (pt) 2016-12-27
CN103563074A (zh) 2014-02-05
US20140016330A1 (en) 2014-01-16
US9730309B2 (en) 2017-08-08
CN103563074B (zh) 2018-09-14
TW201302046A (zh) 2013-01-01
RU2013148615A (ru) 2015-05-10
WO2012136579A1 (fr) 2012-10-11
DE102012205178A1 (de) 2012-10-04
KR20140034781A (ko) 2014-03-20
JP2014517497A (ja) 2014-07-17

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