JPH1070383A - Mounting structure for heat sink - Google Patents
Mounting structure for heat sinkInfo
- Publication number
- JPH1070383A JPH1070383A JP8227125A JP22712596A JPH1070383A JP H1070383 A JPH1070383 A JP H1070383A JP 8227125 A JP8227125 A JP 8227125A JP 22712596 A JP22712596 A JP 22712596A JP H1070383 A JPH1070383 A JP H1070383A
- Authority
- JP
- Japan
- Prior art keywords
- heat sink
- heat
- integrated circuit
- circuit board
- printed circuit
- 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.)
- Granted
Links
Classifications
-
- 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
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump 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
- H01L2224/16221—Disposition the bump 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
- H01L2224/16225—Disposition the bump 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 non-metallic, e.g. insulating substrate with or without metallisation
-
- 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
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73253—Bump and layer connectors
-
- 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
- H01L2924/161—Cap
- H01L2924/1615—Shape
- H01L2924/16152—Cap comprising a cavity for hosting the device, e.g. U-shaped cap
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プリント基板に搭
載された複数個の集積回路から放射される電磁波を遮断
し、且つ各々の集積回路を効率良く放熱させるヒートシ
ンクの実装構造に関し、特にＣＰＵ、キャシュメモリー
等の複数のＬＳＩからの電磁波を遮断すると共にＬＳＩ
を放熱させるヒートシンクの実装構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat sink mounting structure for intercepting electromagnetic waves radiated from a plurality of integrated circuits mounted on a printed circuit board and efficiently radiating heat from each integrated circuit. Blocks electromagnetic waves from multiple LSIs such as cache memory
And a heat sink mounting structure for dissipating heat.
【０００２】[0002]
【従来の技術】従来、この種のヒートシンクの実装構造
は、特開平２−１７６５９号公報に示されるように、プ
リント基板に複数個実装されたＬＳＩを大型のヒートシ
ンクで一括して放熱させ、大型のヒートシンクとプリン
ト基板とで複数個のＬＳＩをまとめて覆うことにより電
磁波を遮断し電磁障害（ＥＭＩ）を防いでいた。特開平
２−１７６５９号公報に記載されたヒートシンクの実装
構造は、図５に示す様にプリント基板５１に搭載された
複数個のＬＳＩ５２を覆う大型のヒートシンク５４がプ
リント基板５１と導電性金属片５５を介して導通され、
複数個のＬＳＩ５２から放射される電磁波を遮断してい
る。また、複数個のＬＳＩ５２はクッション材５３を介
してヒートシンク５４に熱を逃がす構造である。2. Description of the Related Art Conventionally, as shown in Japanese Patent Application Laid-Open No. 2-17659, this type of heat sink mounting structure has a structure in which a plurality of LSIs mounted on a printed circuit board are collectively radiated by a large heat sink to form a large heat sink. The plurality of LSIs are collectively covered with the heat sink and the printed circuit board to block electromagnetic waves and prevent electromagnetic interference (EMI). The mounting structure of the heat sink described in Japanese Patent Application Laid-Open No. 2-17659 discloses a large heat sink 54 covering a plurality of LSIs 52 mounted on a printed circuit board 51 as shown in FIG. Is conducted through
Electromagnetic waves radiated from the plurality of LSIs 52 are blocked. The plurality of LSIs 52 have a structure in which heat is released to the heat sink 54 via the cushion material 53.
【０００３】[0003]
【発明が解決しようとする課題】特開平２−１７６５９
号公報に記載されたヒートシンクの実装構造は、ＬＳＩ
の熱をクッションを介してヒートシンクに伝え放熱して
いる。よって、ＬＳＩの寸法公差やヒートシンク、導伝
性金属片の寸法公差を吸収する為には、クッションには
熱伝導性と相反する軟度及び厚みが要求される。また最
近のＬＳＩには高密度パッケージとしてＢＧＡ（ボール
グリッドアレイ）が採用されているが、この場合半田バ
ンプへの加重は接続信頼性上極力低く抑える事が必要で
あり、クッションを使用するにあたっては更なる軟度が
要求される事になり、熱伝導性が一層悪化する。ＬＳＩ
の寸法公差を吸収する為に、クッションの厚みを更に増
して弾性変形量を増大させる方法もあるが、当然この場
合も厚みが増す事による熱伝達経路の増大、熱伝導性悪
化となる。Problems to be Solved by the Invention
The mounting structure of the heat sink described in
Is transmitted to the heat sink via the cushion and dissipated. Therefore, in order to absorb the dimensional tolerance of the LSI and the dimensional tolerance of the heat sink and the conductive metal piece, the cushion is required to have a softness and a thickness incompatible with the thermal conductivity. In recent LSIs, a BGA (ball grid array) has been adopted as a high-density package. In this case, it is necessary to suppress the weight on the solder bumps as low as possible in terms of connection reliability. Further softness is required, and the thermal conductivity is further deteriorated. LSI
In order to absorb the dimensional tolerance, there is a method of further increasing the thickness of the cushion to increase the amount of elastic deformation. However, in this case, the increase in the thickness also increases the heat transfer path and deteriorates the thermal conductivity.
【０００４】以上のように従来のヒートシンクの実装構
造は、ＬＳＩとヒートシンクの間にクッションを介す構
造で、熱伝導性が悪いという欠点があった。ＢＧＡパッ
ケージにも適用できる熱伝導性に優れ、且つＬＳＩへの
加圧力すなわち半田バンプへの加重を低く抑える事ので
きる構造が必要となってきている。[0004] As described above, the conventional heat sink mounting structure has a disadvantage that thermal conductivity is poor because the cushion is interposed between the LSI and the heat sink. There is a need for a structure that has excellent thermal conductivity that can be applied to a BGA package and that can reduce the pressure applied to the LSI, that is, the weight applied to the solder bumps.
【０００５】[0005]
【課題を解決するための手段】本発明のヒートシンクの
実装構造は、プリント基板（図１の１）と、このプリン
ト基板に実装された第１及び第２の集積回路（図１の２
及び３）と、前記第１の集積回路の上面に載置されかつ
前記プリント基板の少くとも前記第１及び第２の集積回
路の周辺部分を覆う第１のヒートシンク（図１の５）
と、この第１のヒートシンクに設けられた穴（図２の１
８）を挿通して前記第２の集積回路の上面に載置された
第２のヒートシンク（図１の１３）と、前記第１のヒー
トシンクを前記プリント基板及び前記第１の集積回路に
対して固定する固定手段（図１の６）とを備えている。The mounting structure of the heat sink of the present invention comprises a printed circuit board (1 in FIG. 1) and first and second integrated circuits (2 in FIG. 1) mounted on the printed circuit board.
And 3) and a first heat sink (5 in FIG. 1) mounted on the upper surface of the first integrated circuit and covering at least a peripheral portion of the first and second integrated circuits of the printed circuit board.
And a hole (1 in FIG. 2) provided in the first heat sink.
8) and a second heat sink (13 in FIG. 1) mounted on the upper surface of the second integrated circuit, and the first heat sink is connected to the printed circuit board and the first integrated circuit. And fixing means (6 in FIG. 1) for fixing.
【０００６】本発明のヒートシンクの実装構造は、プリ
ント基板（図１の１）と、このプリント基板に実装され
た第１及び第２の集積回路（図１の２及び３）と、前記
第１の集積回路の上面に載置されかつ前記プリント基板
の少くとも前記第１及び第２の集積回路の周辺部分を覆
う第１のヒートシンク（図４の１９）と、前記第２の集
積回路の上面に載置され上面に設けられたフィン（図４
の２１）が前記第１のヒートシンクに設けられた前記フ
ィンの断面とほぼ同一形状の穴（図４の２２）を挿通す
る第２のヒートシンク（図４の２０）と、前記第１のヒ
ートシンクを前記プリント基板及び前記第１の集積回路
に対して固定する固定手段（図１の６）とを備えてい
る。The mounting structure of the heat sink according to the present invention comprises a printed circuit board (1 in FIG. 1), first and second integrated circuits (2 and 3 in FIG. 1) mounted on the printed circuit board, A first heat sink (19 in FIG. 4) mounted on the upper surface of the integrated circuit and covering at least the peripheral portions of the first and second integrated circuits on the printed circuit board; and the upper surface of the second integrated circuit Fins mounted on the upper surface (FIG. 4)
21) is a second heat sink (20 in FIG. 4) inserted through a hole (22 in FIG. 4) having substantially the same shape as the cross section of the fin provided on the first heat sink. Fixing means (6 in FIG. 1) for fixing to the printed circuit board and the first integrated circuit.
【０００７】本発明のヒートシンクの実装構造は、第１
の集積回路へ作用する第１のヒートシンクの加圧力が過
大にならないようにするために前記第１のヒートシンク
と固定手段との間に設けられたスプリング（図２の８）
を備え、第２のヒートシンクを第２の集積回路に押し付
ける加圧手段（図２の１４，図４の１６）を備え、第２
のヒートシンクに設けられ前記第１のヒートシンクを前
記プリント基板及び第１の集積回路から取り外した時に
前記第２のヒートシンクが前記第１のヒートシンクに設
けた穴から抜け落ちないようにする係止部（図２の１
５，図４の１７）を備えることが望ましい。The mounting structure of the heat sink according to the present invention has a first structure.
A spring (8 in FIG. 2) provided between the first heat sink and the fixing means to prevent the pressure of the first heat sink acting on the integrated circuit from becoming excessive.
And pressurizing means (14 in FIG. 2 and 16 in FIG. 4) for pressing the second heat sink against the second integrated circuit.
Locking portion provided on the heat sink for preventing the second heat sink from dropping out of the hole provided in the first heat sink when the first heat sink is removed from the printed circuit board and the first integrated circuit (FIG. 2 in 1
5, it is desirable to provide 17) of FIG.
【０００８】この本発明のヒートシンクの実装構造は、
第１及び第２のヒートシンクの少くともいずれか一方は
放熱シート（図２及び図４の４）を介して第１及び第２
の集積回路の少くともいずれか一方の上面に載置された
ようにすることもでき、この場合は放熱シートは第１ま
たは第２のヒートシンクに接着することが望ましく、ま
た第１及び第２のヒートシンクの少くともいずれか一方
はグリスを介して第１及び第２の集積回路の少くともい
ずれか一方の上面に載置されたようにすることもでき
る。[0008] The mounting structure of the heat sink of the present invention is as follows.
At least one of the first and second heat sinks is connected to the first and second heat sinks via a heat dissipation sheet (4 in FIGS. 2 and 4).
May be mounted on at least one of the upper surfaces of the integrated circuit, in which case the heat dissipation sheet is desirably bonded to the first or second heat sink, and the first and second At least one of the heat sinks may be mounted on the upper surface of at least one of the first and second integrated circuits via grease.
【０００９】さらに、本発明のヒートシンクの実装構造
は、第１のヒートシンクの周縁部とプリント基板の間に
ＥＭＩガスケットを挟む構造であることが望ましい。Further, the mounting structure of the heat sink according to the present invention is desirably a structure in which an EMI gasket is sandwiched between the peripheral portion of the first heat sink and the printed circuit board.
【００１０】さらに上述の本発明のヒートシンクの実装
構造で、例えば第１の集積回路はＣＰＵであり第２の集
積回路はプリント基板の前記第１の集積回路の周辺に搭
載された複数のＬＳＩである。In the above-described mounting structure of the heat sink according to the present invention, for example, the first integrated circuit is a CPU and the second integrated circuit is a plurality of LSIs mounted around the first integrated circuit on a printed circuit board. is there.
【００１１】本発明のヒートシンクの実装構造は、プリ
ント基板に実装された第１の集積回路を放熱させるため
の第１のヒートシンクと、前記第１のヒートシンクと独
立に設けられ前記プリント基板に実装された第２の集積
回路を放熱させるための第２のヒートシンクとで前記プ
リント基板の少くとも前記第１及び第２の集積回路の実
装部分並びにその周辺部を覆い前記第１及び第２の集積
回路から放射される電磁波を遮断したことを特徴とす
る。A mounting structure of a heat sink according to the present invention includes a first heat sink for dissipating heat of a first integrated circuit mounted on a printed board, and a first heat sink provided independently of the first heat sink and mounted on the printed board. And a second heat sink for dissipating the heat of the second integrated circuit to cover at least the mounting portions of the first and second integrated circuits and the periphery thereof on the printed circuit board. The electromagnetic wave radiated from is cut off.
【００１２】[0012]
【発明の実施の形態】次に、本発明について図面を参照
して詳細に説明する。図１は本発明の実施の形態のヒー
トシンクの実装構造の斜視図であり、図２及び図３はそ
れぞれ図１のＡＡ断面図及びＢＢ矢視図である。Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a mounting structure of a heat sink according to an embodiment of the present invention, and FIGS. 2 and 3 are a cross-sectional view taken along the line AA and a line BB of FIG. 1, respectively.
【００１３】図１〜図３を参照すると、本実施の形態で
はプリント基板１にＣＰＵ２及びＣＰＵ２の周辺の複数
のキャシュメモリー等のＬＳＩ３が実装されている。プ
リント基板１はＣＰＵ２及びＬＳＩ３を取り囲むように
グランドパッド９を有し、グランドパッド９上には導電
性補強片１０が実装され、補強片１０はプリント基板１
に設けられた穴を通るネジ１１により固定されている。
補強片１０に導電性材料からなるＥＭＩガスケット１２
が接着されている。ＣＰＵ冷却用大型ヒートシンク５
は、下面中央部に設けられた凸部がＣＰＵ２上に放熱シ
ート４を介して載置され、ヒートシンク５及びプリント
基板１に設けられた穴を通るねじ６及びナット７によっ
てヒートシンク５はＣＰＵ２上に固定されている。ねじ
６の頭部とヒートシンク５の間に介在するスプリング８
により、ねじ６を締め付けてもヒートシンク５からＣＰ
Ｕ２に一定以上の力が加わらないよう調整されている。
放熱シート４はＣＰＵ用ヒートシンク５に接着されるべ
きである。また、弾性のあるＥＭＩガスケット１２がＣ
ＰＵ用ヒートシンク５の周縁部に接触し、ＣＰＵ２及び
ＬＳＩ３から放射される電磁波を遮断する。Referring to FIGS. 1 to 3, in the present embodiment, a CPU 2 and a plurality of LSIs 3 such as cache memories around the CPU 2 are mounted on a printed circuit board 1. The printed board 1 has a ground pad 9 surrounding the CPU 2 and the LSI 3, and a conductive reinforcing piece 10 is mounted on the ground pad 9.
Is fixed by a screw 11 passing through a hole provided in the hole.
EMI gasket 12 made of a conductive material
Is glued. Large heat sink for CPU cooling 5
The heat sink 5 is mounted on the CPU 2 by a screw 6 and a nut 7 passing through a heat sink 5 and a hole provided in the printed circuit board 1 with a convex portion provided at the center of the lower surface placed on the CPU 2 via the heat radiation sheet 4. Fixed. Spring 8 interposed between the head of screw 6 and heat sink 5
With this, even if the screw 6 is tightened, the CP
The adjustment is made so that a force exceeding a certain level is not applied to U2.
The heat dissipation sheet 4 should be bonded to the heat sink 5 for CPU. In addition, the elastic EMI gasket 12
It contacts the peripheral edge of the PU heat sink 5 and blocks electromagnetic waves radiated from the CPU 2 and the LSI 3.
【００１４】ＬＳＩ用ヒートシンク１３はＣＰＵ用ヒー
トシンク５のＬＳＩ３の上側の部分に設けられた穴１８
を挿通してＣＰＵ用ヒートシンク５に各々独立して取り
付けられており、ＬＳＩ用ヒートシンク１３は爪１５に
よりＣＰＵ用ヒートシンク５の穴１８からの脱落が防止
される。ＬＳＩ用ヒートシンク１３とＣＰＵ用ヒートシ
ンク５の間に挟まれた板状スプリング１４がヒートシン
ク１３をＬＳＩ３に押し付けている。この板状スプリン
グ１４は十分な弾性を有し、ＬＳＩ用ヒートシンク１３
をＬＳＩ３に接触させるに際し、ＬＳＩ３への加圧力を
低く抑え且つＬＳＩ３及び各部材の寸法公差を吸収して
いる。The LSI heat sink 13 has a hole 18 formed in a portion of the CPU heat sink 5 above the LSI 3.
Are inserted into the CPU heat sink 5 independently, and the LSI heat sink 13 is prevented from falling out of the hole 18 of the CPU heat sink 5 by the claw 15. A plate spring 14 sandwiched between the LSI heat sink 13 and the CPU heat sink 5 presses the heat sink 13 against the LSI 3. This plate-shaped spring 14 has sufficient elasticity, and the heat sink 13 for LSI
When contacting the LSI 3 with the LSI 3, the pressure applied to the LSI 3 is kept low, and the dimensional tolerance of the LSI 3 and each member is absorbed.
【００１５】ＬＳＩ用ヒートシンク１３は各ＬＳＩ３ご
とに独立して設けられ板状スプリング１４により、寸法
公差が吸収されている為、ＬＳＩ用ヒートシンク１３と
ＬＳＩ３との接触部は放熱性に優れた厚みの薄い放熱シ
ート４を介するだけにする事が可能であり、ＬＳＩ３か
ら熱伝導性の良い、効率良い放熱を行える。The LSI heat sink 13 is provided independently for each LSI 3 and the dimensional tolerance is absorbed by the plate-like spring 14. Therefore, the contact portion between the LSI heat sink 13 and the LSI 3 has a thickness excellent in heat radiation. It is possible only through the thin heat radiating sheet 4 to perform efficient heat radiation from the LSI 3 with good thermal conductivity.
【００１６】図４（Ａ）及び（Ｂ）それぞれは本発明の
他の実施の形態のヒートシンクの実装構造のＬＳＩ３の
近傍部分の断面図及び平面図である。本実施の形態は図
１〜図３に示した実施の形態に対しプリント基板１，Ｃ
ＰＵ２，ＬＳＩ３等は同一でＬＳＩ用ヒートシンク２０
等が異なっている。本実施の形態でのＣＰＵ用ヒートシ
ンク１９もＬＳＩ３の上側の部分は図１〜図３に示した
実施の形態と異なるがその他の部分は図１〜図３に示し
た実施の形態でのＣＰＵ用ヒートシンク５と同一であ
る。FIGS. 4A and 4B are a sectional view and a plan view, respectively, of a portion near an LSI 3 of a heat sink mounting structure according to another embodiment of the present invention. This embodiment is different from the embodiment shown in FIGS.
PU2, LSI3, etc. are the same and LSI heat sink 20
Etc. are different. The heat sink 19 for CPU in the present embodiment is also different from the embodiment shown in FIGS. 1 to 3 in the upper part of the LSI 3, but the other parts are the same as those in the embodiment shown in FIGS. It is the same as the heat sink 5.
【００１７】図４を参照すると、放熱シート４を介して
ＬＳＩ３上に載置されるＬＳＩ用ヒートシンク２０の上
面には複数の棒状のフィン２１が形成されている。Referring to FIG. 4, a plurality of rod-shaped fins 21 are formed on an upper surface of an LSI heat sink 20 mounted on the LSI 3 via the heat radiation sheet 4.
【００１８】ＬＳＩ用ヒートシンク１３の棒状フィン２
１とフィン２１を通す為にＣＰＵ用ヒートシンク１９に
空けられた穴２２との隙間はわずかであり、ＣＰＵ２及
びＬＳＩ３からの電磁波の遮断をより効果的に行うこと
ができる。棒状フィン２１に設けられた溝に装着された
ワッシャ１７がヒートシンク２０のＣＰＵ用ヒートシン
ク１９からの脱落を防ぎ、ＬＳＩ用ヒートシンク２０と
ＣＰＵ用ヒートシンク１９の間にはスプリング１６を有
し、ＬＳＩ用ヒートシンク２０をＬＳＩへ小さな力で加
圧している。Bar-shaped fin 2 of LSI heat sink 13
Since the gap between the CPU 1 and the hole 22 formed in the heat sink 19 for passing the fin 21 is small, the electromagnetic wave from the CPU 2 and the LSI 3 can be more effectively blocked. A washer 17 mounted in a groove provided in the rod-shaped fin 21 prevents the heat sink 20 from falling off from the CPU heat sink 19, and has a spring 16 between the LSI heat sink 20 and the CPU heat sink 19. 20 is applied to the LSI with a small force.
【００１９】放熱シート４は、例えばシリコン樹脂のシ
ートを用いることができ、ＣＰＵ用ヒートシンク５，１
９またはＬＳＩ用ヒートシンク１３，１９に接着してお
けば取り扱い易くなるが、接着してなくても本発明は適
用可能である。As the heat radiation sheet 4, for example, a sheet of silicon resin can be used, and the heat sinks 5, 1 for CPU are used.
If it is bonded to the heat sink 9 or the heat sinks 13 and 19 for LSI, the handling becomes easy. However, the present invention can be applied even without bonding.
【００２０】また、放熱シート４を用いないでＣＰＵ２
及びＬＳＩ３の上面にシリコングリース等のグリースを
塗っておいてＣＰＵ２とＣＰＵ用ヒートシンク５，１９
との間及びＬＳＩ３とＬＳＩ用ヒートシンク１３，２０
との間にグリースを挟むようにしてもよい。この場合に
グリースを薄くしても本発明では十分な放熱効果を得る
ことができる。Also, without using the heat radiation sheet 4, the CPU 2
And grease such as silicon grease on the upper surface of the LSI 3 and the CPU 2 and the heat sinks 5 and 19 for the CPU.
And between the LSI 3 and the LSI heat sinks 13 and 20
And grease may be interposed between them. In this case, even if the grease is thinned, a sufficient heat radiation effect can be obtained in the present invention.
【００２１】さらに、ＣＰＵ２及びＬＳＩ３の上面並び
にヒートシンクのこれらＣＰＵ２及びＬＳＩ３に対向す
る面の平面度及び表面粗さを十分に小さくしておけば、
放熱シートもグリースも用いずにＣＰＵ２及びＬＳＩ３
の上面にヒートシンクを直接に接触させるだけでもよ
い。この場合にも本発明はＣＰＵ用ヒートシンク及びＬ
ＳＩ用ヒートシンクが独立して動き得るように取り付け
られ、別個のスプリングで加圧されるためＣＰＵ２，Ｌ
ＳＩ３等の寸法のばらつきを吸収してＣＰＵ２及びＬＳ
Ｉ３の上面にヒートシンクを密着させることができ、十
分な放熱効果を得ることができる。Furthermore, if the flatness and surface roughness of the upper surface of the CPU 2 and the LSI 3 and the surface of the heat sink facing the CPU 2 and the LSI 3 are sufficiently reduced,
CPU2 and LSI3 without heat dissipation sheet or grease
The heat sink may be brought into direct contact with the upper surface of the device. Also in this case, the present invention provides a heat sink for CPU and L
The heat sink for SI is attached so that it can move independently, and is pressurized by a separate spring.
CPU2 and LS by absorbing dimensional variations such as SI3
A heat sink can be closely attached to the upper surface of I3, and a sufficient heat radiation effect can be obtained.
【００２２】なお、ＣＰＵ２とＣＰＵ用ヒートシンクと
の間にのみ放熱シート４を挟み、ＬＳＩ３とＬＳＩ用ヒ
ートシンクとは直接に接触させることも勿論可能であ
る。It is of course possible to sandwich the heat radiation sheet 4 only between the CPU 2 and the heat sink for CPU, and to directly contact the LSI 3 and the heat sink for LSI.
【００２３】図４には丸棒状のフィン２１を示してある
が、ＬＳＩ用ヒートシンクの上面に角棒状または平板状
のフィンを設け、ＣＰＵ用ヒートシンクにこれらを通す
ための角穴や長穴を開けるようにしてもよい。このよう
な場合にはＬＳＩ用ヒートシンクをＬＳＩに押し付ける
ためのスプリングを取り付け易いようにコイル状スプリ
ングまたは板状スプリング等の適切なものにすればよ
い。FIG. 4 shows the round bar-shaped fins 21. Square bar-shaped or plate-shaped fins are provided on the upper surface of the LSI heat sink, and square holes or long holes for passing these through the CPU heat sink are formed. You may do so. In such a case, a suitable spring such as a coil spring or a plate spring may be used so that a spring for pressing the LSI heat sink against the LSI is easily attached.
【００２４】また、プリント基板１の無振動が確保され
ているような場合は、ＬＳＩ用ヒートシンクをＬＳＩに
押し付ける加圧手段としてスプリングの代わりにＬＳＩ
ヒートシンクの自重を用いることができる場合もあり、
さらに加圧手段として磁力の利用も考えられる。In a case where the printed circuit board 1 is ensured to have no vibration, an LSI may be used instead of a spring as a pressing means for pressing the LSI heat sink against the LSI.
In some cases, the heat sink's own weight can be used,
Further, the use of magnetic force as a pressing means is also conceivable.
【００２５】[0025]
【発明の効果】本発明のヒートシンクの実装構造は、プ
リント基板に実装された第１及び第２の集積回路及びそ
の周辺を第１及び第２のヒートシンクで覆い、第１及び
第２の集積回路から放射される電磁波を遮断し電磁障害
を防ぐことができる。According to the mounting structure of the heat sink of the present invention, the first and second integrated circuits mounted on a printed circuit board and the periphery thereof are covered with the first and second heat sinks, and the first and second integrated circuits are mounted. The electromagnetic wave radiated from is blocked to prevent electromagnetic interference.
【００２６】また、第１及び第２の集積回路それぞれを
放熱させる第１及び第２のヒートシンクを独立に取り付
けることにより、各部材の寸法公差を吸収し、第１及び
第２の集積回路と第１及び第２のヒートシンクとの間に
介在させた場合に放熱シートを薄くし軟度が低いものに
しても第１及び第２のヒートシンクを放熱シートを介し
て第１及び第２の集積回路に十分に接触させることがで
き、第１及び第２の集積回路に対する熱伝導性の良い効
率の良い放熱、冷却が得られる効果がある。Further, by independently mounting the first and second heat sinks for dissipating heat of the first and second integrated circuits, the dimensional tolerance of each member is absorbed, and the first and second integrated circuits and the second integrated circuit are connected to each other. The first and second heat sinks are connected to the first and second integrated circuits via the heat radiation sheet even when the heat radiation sheet is thin and has low softness when interposed between the first and second heat sinks. The first and second integrated circuits can be sufficiently contacted, and there is an effect that efficient heat radiation and cooling with good thermal conductivity to the first and second integrated circuits can be obtained.
【図１】本発明の実施の形態のヒートシンクの冷却構造
の分解斜視図である。FIG. 1 is an exploded perspective view of a heat sink cooling structure according to an embodiment of the present invention.
【図２】図１のＡ−Ａ断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】図１のＢ−Ｂ矢視図である。FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;
【図４】（Ａ）は本発明の他の実施の形態のヒートシン
クの冷却構造の部分断面図である。（Ｂ）（Ａ）の部分
を上から見た平面図である。FIG. 4A is a partial cross-sectional view of a heat sink cooling structure according to another embodiment of the present invention. (B) It is the top view which looked at the part of (A) from the upper part.
【図５】従来のヒートシンクの冷却構造の断面図であ
る。FIG. 5 is a sectional view of a conventional heat sink cooling structure.
１ プリント基板 ２ ＣＰＵ ３ ＬＳＩ ４ 放熱シート ５ ＣＰＵ用ヒートシンク ６ ねじ ７ ナット ８ スプリング ９ グランドパッド １０ 導電性補強片 １１ ねじ １２ ＥＭＩガスケット １３ ＬＳＩ用ヒートシンク １４ 板状スプリング １５ 爪 １６ スプリング １７ ワッシャ １８ 穴 １９ ＣＰＵ用ヒートシンク ２０ ＬＳＩ用ヒートシンク ２１ 棒状フィン ２２ 穴 ５１ プリント基板 ５２ ＬＳＩ ５３ クッション材 ５４ ヒートシンク ５５ 導電性金属片 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 CPU 3 LSI 4 Heat dissipation sheet 5 Heat sink for CPU 6 Screw 7 Nut 8 Spring 9 Ground pad 10 Conductive reinforcing piece 11 Screw 12 EMI gasket 13 Heat sink for LSI 14 Plate spring 15 Claw 16 Spring 17 Washer 18 Hole 19 Heat sink for CPU 20 Heat sink for LSI 21 Bar-shaped fin 22 Hole 51 Printed circuit board 52 LSI 53 Cushion material 54 Heat sink 55 Conductive metal piece
Claims (11)
装された第１及び第２の集積回路と、前記第１の集積回
路の上面に載置されかつ前記プリント基板の少なくとも
前記第１及び第２の集積回路の周辺部分を覆う第１のヒ
ートシンクと、この第１のヒートシンクに設けられた穴
を挿通して前記第２の集積回路の上面に載置された第２
のヒートシンクと、前記第１のヒートシンクを前記プリ
ント基板及び前記第１の集積回路に対して固定する固定
手段とを含むことを特徴とするヒートシンクの実装構
造。1. A printed circuit board, first and second integrated circuits mounted on the printed circuit board, and at least the first and second integrated circuits mounted on an upper surface of the first integrated circuit and mounted on the printed circuit board. A first heat sink that covers a peripheral portion of the integrated circuit; and a second heat sink that is mounted on the upper surface of the second integrated circuit through a hole provided in the first heat sink.
A heat sink, and fixing means for fixing the first heat sink to the printed circuit board and the first integrated circuit.
装された第１及び第２の集積回路と、前記第１の集積回
路の上面に載置されかつ前記プリント基板の少なくとも
前記第１及び第２の集積回路の周辺部分を覆う第１のヒ
ートシンクと、前記第２の集積回路の上面に載置され上
面に設けられたフィンが前記第１のヒートシンクに設け
られた前記フィンの断面とほぼ同一形状の穴を挿通する
第２のヒートシンクと、前記第１のヒートシンクを前記
プリント基板及び前記第１の集積回路に対して固定する
固定手段とを含むことを特徴とするヒートシンクの実装
構造。2. A printed circuit board, first and second integrated circuits mounted on the printed circuit board, and at least the first and second integrated circuits mounted on an upper surface of the first integrated circuit and mounted on the printed circuit board. A first heat sink that covers a peripheral portion of the integrated circuit; and a fin mounted on the upper surface of the second integrated circuit and provided on the upper surface has substantially the same shape as a cross section of the fin provided on the first heat sink. And a fixing means for fixing the first heat sink to the printed circuit board and the first integrated circuit.
シンクの加圧力が過大にならないようにするために前記
第１のヒートシンクと固定手段との間に設けられたスプ
リングを備えたことを特徴とする請求項１または２記載
のヒートシンクの実装構造。3. A spring provided between the first heat sink and the fixing means to prevent the pressure of the first heat sink acting on the first integrated circuit from becoming excessive. The mounting structure of the heat sink according to claim 1 or 2, wherein:
押し付ける加圧手段を備えたことを特徴とする請求項
１、２または３記載のヒートシンクの実装構造。4. The heat sink mounting structure according to claim 1, further comprising a pressurizing means for pressing the second heat sink against the second integrated circuit.
のヒートシンクを前記プリント基板及び第１の集積回路
から取り外した時に前記第２のヒートシンクが前記第１
のヒートシンクに設けた穴から抜け落ちないようにする
係止部を備えたことを特徴とする請求項４記載のヒート
シンクの実装構造。5. The first heat sink provided on a second heat sink.
When the second heat sink is removed from the printed circuit board and the first integrated circuit,
5. The mounting structure for a heat sink according to claim 4, further comprising a locking portion for preventing the hole from dropping out of the hole provided in the heat sink.
もいずれか一方は放熱シートを介して第１及び第２の集
積回路の少なくともいずれか一方の上面に載置されたこ
とを特徴とする請求項１ないし５記載のヒートシンクの
実装構造。6. The apparatus according to claim 1, wherein at least one of the first and second heat sinks is mounted on at least one of the upper surfaces of the first and second integrated circuits via a heat radiation sheet. 6. The mounting structure of the heat sink according to any one of 1 to 5.
ンクに接着されたことを特徴とする請求項６記載のヒー
トシンクの実装構造。7. The heat sink mounting structure according to claim 6, wherein the heat radiating sheet is bonded to the first or second heat sink.
もいずれか一方はグリスを介して第１及び第２の集積回
路の少なくともいずれか一方の上面に載置されたことを
特徴とする請求項１ないし７記載のヒートシンク実装構
造。8. The semiconductor device according to claim 1, wherein at least one of the first and second heat sinks is mounted on an upper surface of at least one of the first and second integrated circuits via grease. 8. The heat sink mounting structure according to claim 7.
基板の間にＥＭＩガスケットが挟まれたことを特徴とす
る請求項１ないし８記載のヒートシンクの実装構造。9. The heat sink mounting structure according to claim 1, wherein an EMI gasket is sandwiched between a peripheral portion of the first heat sink and the printed circuit board.
集積回路はプリント基板の前記第１の集積回路の周辺に
搭載された複数のＬＳＩであることを特徴とする請求項
１ないし９記載のヒートシンクの実装構造。10. The method according to claim 1, wherein the first integrated circuit is a CPU and the second integrated circuit is a plurality of LSIs mounted on a printed circuit board around the first integrated circuit. The mounting structure of the described heat sink.
回路を放熱させるための第１のヒートシンクと、前記第
１のヒートシンクと独立に設けられ前記プリント基板に
実装された第２の集積回路を放熱させるための第２のヒ
ートシンクとで前記プリント基板の少くとも前記第１及
び第２の集積回路の実装部分並びにその周辺部を覆い前
記第１及び第２の集積回路から放射される電磁波を遮断
したことを特徴とするヒートシンクの実装構造。11. A first heat sink for dissipating heat of a first integrated circuit mounted on a printed board, and a second integrated circuit provided independently of the first heat sink and mounted on the printed board. A second heat sink for dissipating heat covers at least a mounting portion of the first and second integrated circuits and a peripheral portion of the printed circuit board, and blocks electromagnetic waves radiated from the first and second integrated circuits. A mounting structure for a heat sink, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8227125A JP2828059B2 (en) | 1996-08-28 | 1996-08-28 | Mounting structure of heat sink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8227125A JP2828059B2 (en) | 1996-08-28 | 1996-08-28 | Mounting structure of heat sink |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1070383A true JPH1070383A (en) | 1998-03-10 |
| JP2828059B2 JP2828059B2 (en) | 1998-11-25 |
Family
ID=16855879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8227125A Expired - Fee Related JP2828059B2 (en) | 1996-08-28 | 1996-08-28 | Mounting structure of heat sink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2828059B2 (en) |
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| JP2006352117A (en) * | 2005-06-18 | 2006-12-28 | Kofukin Seimitsu Kogyo (Shenzhen) Yugenkoshi | Electromagnetic interference shielding apparatus |
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| JP2016184658A (en) * | 2015-03-26 | 2016-10-20 | 日本電気株式会社 | Cooling device, and device |
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| JP2017521876A (en) * | 2015-05-21 | 2017-08-03 | シャオミ・インコーポレイテッド | Circuit protection structure and electronic device |
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| KR20220138492A (en) * | 2021-04-02 | 2022-10-13 | 주식회사 태인엘티에스 | Radiating device for displaying apparatus and its manufacturing method |
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|---|---|
| JP2828059B2 (en) | 1998-11-25 |
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