WO2011040253A1 - 電子部品の冷却構造、電子機器 - Google Patents
電子部品の冷却構造、電子機器 Download PDFInfo
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- WO2011040253A1 WO2011040253A1 PCT/JP2010/066050 JP2010066050W WO2011040253A1 WO 2011040253 A1 WO2011040253 A1 WO 2011040253A1 JP 2010066050 W JP2010066050 W JP 2010066050W WO 2011040253 A1 WO2011040253 A1 WO 2011040253A1
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- metal plate
- cooling structure
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- heat
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- 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
- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/427—Cooling by change of state, e.g. use of heat pipes
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- 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
- H01L23/40—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
- H01L23/4006—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws
- H01L2023/4037—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws characterised by thermal path or place of attachment of heatsink
- H01L2023/4056—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws characterised by thermal path or place of attachment of heatsink heatsink to additional heatsink
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- 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
- H01L23/40—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
- H01L23/4006—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws
- H01L2023/4075—Mechanical elements
- H01L2023/4081—Compliant clamping elements not primarily serving heat-conduction
-
- 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
Definitions
- the present invention relates to cooling of electronic components such as semiconductor devices, and more particularly to a cooling structure of electronic components and an electronic apparatus for a device composed of a packaged semiconductor chip.
- a cooler such as a heat sink or a heat pipe is grounded to the semiconductor element.
- the grounding surface of the cooler forms a heat transfer path with respect to the surface of the heating element through a thin film layer mainly made of a polymer material called Thermal Interface Material (TIM).
- TIM Thermal Interface Material
- Patent Document 1 describes a structure in which a collision flow is directly supplied to the vicinity of the element center where particularly high cooling capacity is required by eliminating fins of the heat sink. In such a structure, it is possible to directly supply cool air to the vicinity of the element center region, but on the other hand, it is necessary to eliminate the fin in that region, and a trade-off with the heat radiation efficiency by the fin occurs.
- Patent Document 2 proposes a structure for setting the pressure generation position of a clip for fixing the heat sink near the center of the heat sink. This makes it possible to reduce the thermal resistance in the TIM region.
- heat absorption is limited to the surface in contact with the element.
- the role of the thermal resistance distribution in the TIM region is large, and its influence can be seen from the fact that the thermal resistance in the region where abnormally high pressure is generated when the ground balance becomes unbalanced is greatly reduced.
- a region where an abnormally low pressure is generated occurs, and the thermal resistance in that region is greatly deteriorated.
- Patent Document 2 proposes a structure that can always maintain a large contact pressure near the center of the element even when the contact balance becomes unbalanced.
- the heat absorption area during cooling is limited to the element area.
- Patent Document 3 proposes a cooling structure using a heat pipe.
- the cooling structure is fixed by a leaf spring, and the force is generated near the center of the CPU.
- the heat pipe is installed near the center of the CPU because it has the highest endothermic effect on the surface in contact with the heat pipe. It is most efficient to generate the pressure of the leaf spring in the center, but in reality, pressure cannot be applied to the hollow heat pipe, so it must be eccentric from that center.
- the above-described conventional cooling structure for electronic parts and electronic devices equipped with the same have problems such as an increase in heat generation, an increase in heat generation area, imbalance in grounding balance of the cooling structure, and uneven temperature distribution. .
- An increase in the heat generation amount and the heat generation area suggests an increase in local heat generation density, and there is a risk that the reliability of the apparatus is lowered and the fan load is increased. And there was a possibility of causing deterioration of grounding balance and deterioration of temperature distribution in the element.
- the electronic component cooling structure on the first side includes a semiconductor element, a substrate on which the semiconductor element is mounted, a metal plate that contacts one surface of the semiconductor element via a thermal interface material, and absorbs heat, and is connected to the metal plate
- a cooling structure of an electronic component having at least a heat pipe, The metal plate is in contact with both the semiconductor element and the substrate through the thermal interface material.
- a fulcrum for fixing a cooler composed of the metal plate and the heat pipe to the semiconductor element may be provided on the metal plate facing the substrate.
- the heat pipe is grounded to the metal plate facing the semiconductor element. Moreover, the said heat pipe should just be earth
- the thermal interface material is made of liquid or grease, and may be filled in both the space between the semiconductor surface and the metal plate and between the substrate surface and the metal plate.
- the thermal interface material may be made of a solid or a heat conductive sheet, and may be filled in both spaces between the semiconductor surface and the metal plate and between the substrate surface and the metal plate.
- the electronic device is characterized in that the electronic component cooling structure described in each of the above items is mounted.
- the heat receiving area can be made larger than before by contacting the cooler heat absorption surface with both the heating element surface and the package substrate surface.
- the package can be cooled with a smaller thermal resistance, and the temperature and reliability of the semiconductor element can be reduced.
- the fulcrum for fixing the heat sink can be fixed at a point close to the center of the element.
- the installation balance can be improved, and the cooling performance of an important element central region can be improved.
- a cooling structure with a more uniform temperature distribution within the element can be provided.
- the heat pipe can be grounded with a low profile, and the apparatus can be thinned.
- FIG. 2 is a cross-sectional view taken along line AA in FIG. It is a top view which shows the cooling structure of the electronic component in 2nd embodiment.
- FIG. 4 is a cross-sectional view taken along line AA in FIG. It is a top view which shows the cooling structure of the electronic component in 3rd embodiment.
- FIG. 6 is a cross-sectional view taken along line AA in FIG. It is a top view which shows the cooling structure of the electronic component in 4th embodiment.
- FIG. 8 is a cross-sectional view taken along line AA in FIG. It is a top view which shows the cooling structure of the electronic component in 5th embodiment.
- FIG. 10 is a cross-sectional view taken along line AA in FIG. 9. It is a top view which shows an example of an electronic device.
- FIG. 1 is a plan view showing a cooling structure of an electronic component in the first embodiment
- FIG. 2 is a cross-sectional view taken along line AA in FIG.
- a semiconductor package in which a rectangular semiconductor element of 10 mm ⁇ 20 mm is mounted on a substrate of about 40 mm square is taken.
- 1 is a semiconductor element
- 2 is a substrate
- 3 is a metal plate
- 4 is a heat pipe
- 5 is a leaf spring
- 6 is a fastening screw
- 7 is a fixed fulcrum
- 8 is a thermal interface material.
- the metal plate 3 forming the endothermic surface is protruded in accordance with the size of the semiconductor element 1 at the center.
- a fixed fulcrum 7 for fixing the leaf spring 5 is provided at the center of the protruding surface, and the leaf spring 5 is installed in all directions.
- the ground pressure passes through one point of the fixed fulcrum 7 so that the inclination of the heat absorption surface with respect to the surface of the heating element is minimized.
- the heat pipe 4 is installed around the projecting region so as to surround it from the outside.
- the cooling capacity is improved by increasing the heat absorption area of the cooler.
- FIG. 3 is a plan view showing a cooling structure of an electronic component in the second embodiment
- FIG. 4 is a cross-sectional view taken along line AA in FIG.
- This embodiment is an example in which the heat pipe 4 is formed so as to overlap the semiconductor element 1 by installing a plate spring 5 for fixing in a region in contact with the substrate 2.
- FIG. 5 is a plan view showing a cooling structure of an electronic component in the third embodiment
- FIG. 6 is a cross-sectional view taken along line AA in FIG.
- This embodiment is an example in which two heat pipes 4 are arranged so as to extend in a direction orthogonal to the long side direction of the semiconductor element 1.
- FIG. 7 is a plan view showing a cooling structure of an electronic component in the fourth embodiment
- FIG. 8 is a cross-sectional view taken along line AA in FIG.
- one heat pipe 4 and a leaf spring 5 are arranged in parallel so as to extend in a direction orthogonal to the long side direction of the semiconductor element 1.
- FIG. 9 is a plan view showing an electronic component cooling structure in the fifth embodiment
- FIG. 10 is a cross-sectional view taken along the line AA in FIG.
- a fixing plate spring 5 is installed in a region in contact with the substrate 2, and two heat pipes 4 are formed on both sides that do not overlap the semiconductor element 1.
- FIG. 11 is a plan view illustrating an example of an electronic device.
- 9 is a personal computer main body
- 10 is a hard disk drive
- 11 is a DVD drive
- 12 is a substrate
- 13 is a CPU package
- 14 is a fan
- 15 is a radiation fin.
- the thermal interface material 8 may be liquid or grease.
- the thermal interface material 8 may be a solid or a heat conductive sheet.
- semiconductor devices such as electronic devices, notebook / desktop PCs, workstations, and servers that require cooling.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
本願は、2009年9月30日に、日本に出願された特願2009-226148号に基づき優先権を主張し、その内容をここに援用する。
パッケージの全体構造を利用する冷却構造とすることで、冷却性能の向上だけでなく、接地バランスの改善、素子内温度分布の均一化を通じた冷却性能の安定化も求められている。
第1の側面の電子部品の冷却構造は、半導体素子と、該半導体素子が実装された基板と、前記半導体素子の一面に熱界面材料を介して接し吸熱する金属板と、該金属板に接続されたヒートパイプと、を少なくとも有する電子部品の冷却構造であって、
前記金属板が前記半導体素子と前記基板の両方に対して、前記熱界面材料を介して接することを特徴とする。
また、前記金属板と前記ヒートパイプからなる冷却器を前記半導体素子に対して固定する支点を、前記基板に対面する前記金属板に設ければよい。
また、前記ヒートパイプが前記基板に対面する前記金属板に接地されていればよい。
また、前記熱界面材料は固体もしくは熱伝導性シートからなり、前記半導体面と前記金属板との間、および前記基板面と前記金属板との間の両方の空間に充填されていればよい。
また、大きな吸熱面積を利用してヒートパイプが設置されることにより、ヒートシンク固定のための支点を素子中央に近い点で固定することが可能となる。設置バランスの向上させることが出来、重要な素子中央領域の冷却性を改善することができる。
さらに、設置バランスの向上の結果、素子内温度分布がより均一な冷却構造が提供できる。
そして、ヒートパイプを低背に接地することが可能で、装置の薄型化が可能となる。
図1は、第一実施形態における電子部品の冷却構造を示す平面図であり、図2は、図1におけるA-A線での断面図である。
ここでは、例えば、10mm×20mmの長方形の半導体素子が約40mm正方の基板に実装された半導体パッケージをとり挙げる。図1、2において、1は半導体素子、2は基板、3は金属板、4はヒートパイプ、5は板バネ、6は締結ねじ、7は固定支点、8は熱界面材料をそれぞれ示す。
図3は、第二実施形態における電子部品の冷却構造を示す平面図であり、図4は、図3におけるA-A線での断面図である。この実施形態は、固定用の板バネ5を基板2に接する領域に設置することで、半導体素子1に重なるようにヒートパイプ4を形成した例である。
図5は第三実施形態における電子部品の冷却構造を示す平面図であり、図6は図5におけるA-A線での断面図である。この実施形態は、半導体素子1の長辺方向と直交する方向に延びるように2本のヒートパイプ4を配した例である。
図7は、第四実施形態における電子部品の冷却構造を示す平面図であり、図8は、図7におけるA-A線での断面図である。この実施形態は、半導体素子1の長辺方向と直交する方向に延びるように1本のヒートパイプ4と、板バネ5とを平行に配した例である。
図9は、第五実施形態における電子部品の冷却構造を示す平面図であり、図10は、図9におけるA-A線での断面図である。この実施形態は、固定用の板バネ5を基板2に接する領域に設置し、かつ、半導体素子1に重ならない両側に2本のヒートパイプ4を形成した例である。
図11は、電子機器の一例を示す平面図である。
図11において、9はパーソナルコンピューター本体、10はハードディスクドライブ、11はDVDドライブ、12は基板、13はCPUパッケージ、14はファン、15は放熱フィンをそれぞれ示す。
こうした構成によれば、接地圧力を板バネ構造で発生させる場合、低背な冷却構造が可能となるが、従来は発熱素子直上に接地されたヒートパイプの高さに制限されていた。上記の実施形態によれば、ヒートパイプはより背の低いパッケージ基板上に接地することが可能で、冷却構造を含めて低背にすることが可能で、小型化が進む携帯端末などの電子機器の一層の小型化にも寄与する。
なお、上記の各実施形態において、熱界面材料8は液体もしくはグリースであってもよい。あるいは、熱界面材料8は固体もしくは熱伝導性シートであってもよい。
2 基板
3 金属板
4 ヒートパイプ
5 板バネ
6 締結ねじ
7 固定支点
8 熱界面材料
9 パーソナルコンピューター本体
10 ハードディスクドライブ
11 DVDドライブ
12 基板
13 CPUパッケージ
14 ファン
15 放熱フィン
Claims (9)
- 半導体素子と、
該半導体素子が実装された基板と、
前記半導体素子の一面に熱界面材料を介して接し吸熱する金属板と、
該金属板に接続されたヒートパイプと、を少なくとも有する電子部品の冷却構造であって、
前記金属板が前記半導体素子と前記基板の両方に対して、前記熱界面材料を介して接することを特徴とする電子部品の冷却構造。 - 前記金属板と前記ヒートパイプからなる冷却器を前記半導体素子に対して固定する支点を、前記半導体素子に対面する前記金属板に設けたことを特徴とする請求項1記載の電子部品の冷却構造。
- 前記金属板と前記ヒートパイプからなる冷却器を前記半導体素子に対して固定する支点を、前記基板に対面する前記金属板に設けたことを特徴とする請求項1記載の電子部品の冷却構造。
- 前記ヒートパイプが前記半導体素子に対面する前記金属板に接地されていることを特徴とする請求項1記載の電子部品の冷却構造。
- 前記ヒートパイプが前記基板に対面する前記金属板に接地されていることを特徴とする請求項1記載の電子部品の冷却構造。
- 前記熱界面材料は液体もしくはグリースからなり、前記半導体面と前記金属板との間、および前記基板面と前記金属板との間の両方の空間に充填されていることを特徴とする請求項1記載の電子部品の冷却構造。
- 前記熱界面材料は固体もしくは熱伝導性シートからなり、前記半導体面と前記金属板との間、および前記基板面と前記金属板との間の両方の空間に充填されていることを特徴とする請求項1記載の電子部品の冷却構造。
- 請求項1に記載された電子部品の冷却構造を搭載したことを特徴とする電子機器。
- 請求項7に記載された電子部品の冷却構造を搭載したことを特徴とする電子機器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US13/498,892 US8908373B2 (en) | 2009-09-30 | 2010-09-16 | Cooling structure for an electronic component and electronic instrument |
JP2011534193A JPWO2011040253A1 (ja) | 2009-09-30 | 2010-09-16 | 電子部品の冷却構造、電子機器 |
CN2010800431977A CN102549742A (zh) | 2009-09-30 | 2010-09-16 | 电子部件的冷却构造、电子仪器 |
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JP2009-226148 | 2009-09-30 | ||
JP2009226148 | 2009-09-30 |
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JP (1) | JPWO2011040253A1 (ja) |
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WO (1) | WO2011040253A1 (ja) |
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- 2010-09-16 JP JP2011534193A patent/JPWO2011040253A1/ja active Pending
- 2010-09-16 CN CN2010800431977A patent/CN102549742A/zh active Pending
- 2010-09-16 US US13/498,892 patent/US8908373B2/en not_active Expired - Fee Related
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2019160976A (ja) * | 2018-03-12 | 2019-09-19 | 富士通株式会社 | 冷却機構付き基板 |
JP7000931B2 (ja) | 2018-03-12 | 2022-01-19 | 富士通株式会社 | 冷却機構付き基板 |
JP2021534588A (ja) * | 2018-08-20 | 2021-12-09 | コメット アーゲー | Rfコンポーネント用マルチスタック冷却構造 |
JP7116843B2 (ja) | 2018-08-20 | 2022-08-10 | コメット アーゲー | Rfコンポーネント用マルチスタック冷却構造 |
CN112133684A (zh) * | 2020-09-11 | 2020-12-25 | 安徽龙芯微科技有限公司 | 一种散热盖接地封装结构及其工艺 |
CN112133684B (zh) * | 2020-09-11 | 2022-08-02 | 安徽龙芯微科技有限公司 | 一种散热盖接地封装结构及其工艺 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2011040253A1 (ja) | 2013-02-28 |
US8908373B2 (en) | 2014-12-09 |
US20120193076A1 (en) | 2012-08-02 |
CN102549742A (zh) | 2012-07-04 |
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