JPH03248550A - Metal plate heat sink - Google Patents

Metal plate heat sink

Info

Publication number
JPH03248550A
JPH03248550A JP4798390A JP4798390A JPH03248550A JP H03248550 A JPH03248550 A JP H03248550A JP 4798390 A JP4798390 A JP 4798390A JP 4798390 A JP4798390 A JP 4798390A JP H03248550 A JPH03248550 A JP H03248550A
Authority
JP
Japan
Prior art keywords
metal plate
metal
heat sink
metal foil
plate heat
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
Application number
JP4798390A
Other languages
Japanese (ja)
Other versions
JP2697229B2 (en
Inventor
Katsunao Takehara
克尚 竹原
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4798390A priority Critical patent/JP2697229B2/en
Publication of JPH03248550A publication Critical patent/JPH03248550A/en
Application granted granted Critical
Publication of JP2697229B2 publication Critical patent/JP2697229B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

PURPOSE:To obtain a highly reliable metal plate heat sink by removing metal foil from four corners of a rectangular or square part being subjected to drawing. CONSTITUTION:A square recess is provided in the center of a metal plate heat sink through drawing and holes 4 are made through a metal foil at four corners of the square recess. In other words. the metal foil 3 is removed so that it does not interfere with the part to be drawn. Consequently, when the metal plate heat sink, i.e., a laminate of the metal board 1, an insulation layer 2 and the metal foil 3, is subjected to drawing the function of the metal plate heat sink is not damaged even if the resin insulation layer 2 is broken at the point subjected to highest stress and deformation, because the metal foil 3 does not exist at that point. Consequently, a highly reliable metal plate heat sink can be obtained.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、半導体装置の放熱板に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a heat sink for a semiconductor device.

[従来の技術] 第4図は従来の放熱金属板の正面図、第5図は第4図の
放熱金属板の右側面図である。図中(1)は金寓板、(
2)は金属板(1)の珀側に貼合されたー脂による絶縁
層、(3)は絶縁層(2)上に貼合された金属箔である
[Prior Art] FIG. 4 is a front view of a conventional heat-radiating metal plate, and FIG. 5 is a right side view of the heat-radiating metal plate of FIG. 4. (1) in the figure is a gold board, (
2) is an insulating layer made of resin pasted on the square side of the metal plate (1), and (3) is a metal foil pasted on the insulating layer (2).

次に動作について説明する。Next, the operation will be explained.

金属板(1)の金属箔(3)の反対側表面には通常放熱
のための、放熱フィンが取りつけられる。金属箔(3)
の中央部には半導体素子が既知の方法で接着される。通
常、金属箔(3)と金属板(1)の間には、実使用時に
電位が発生するため、絶縁層に)が十分な耐電圧を有す
ることが必要である。
A radiation fin for heat radiation is usually attached to the surface of the metal plate (1) opposite to the metal foil (3). Metal foil (3)
A semiconductor element is bonded to the central portion of the substrate by a known method. Normally, a potential is generated between the metal foil (3) and the metal plate (1) during actual use, so it is necessary that the insulating layer (2) has a sufficient withstand voltage.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の放熱金属板は以上のように構成されているので、
金属板の中央部に、絞り加工によって正方形状のへこみ
を設けであるが、絞り加工の場合、正方形の4fV4の
部分の材料の変形が最も複雑で、変形量も大きい。その
ために絞り加工の過程に於て、金属板と金属層の間には
さまれた樹脂による絶縁層が過大の力及び変形を受け、
破壊される事が有るなどの問題点があった。
Since the conventional heat dissipation metal plate is configured as described above,
A square-shaped recess is formed in the center of the metal plate by drawing, but in the case of drawing, the deformation of the material in the square 4fV4 portion is the most complicated and the amount of deformation is large. Therefore, during the drawing process, the resin insulation layer sandwiched between the metal plate and the metal layer is subjected to excessive force and deformation.
There were problems such as the possibility of destruction.

この発明は 上記のような問題点を解消するためKなさ
れたもので、放熱金属板を絞り加工する時K、加工応力
の最も大きくなる部位を改善し。
This invention was made to solve the above-mentioned problems, and improves the area where the processing stress is greatest when drawing a heat dissipating metal plate.

信頼性の高い放熱金属板を得ることを目的とするう〔課
題を解決するための手段〕 通常、金属板を矩形あるいは正方形状に絞り加工する場
合矩形あるいは正方形の4隅の部分の変形が複雑で、応
力も大きい。したがって、金属板と金属箔を複数枚絶縁
層を介して貼り合せた積層板を同様に絞り加工する場合
、4隅に於て、金属板と金属箔の絶縁が破壊される。こ
の発明に係る放熱金属板は、上記の絶縁破壊を防ぐため
、変形応力の大きい部位の金属箔を除去するものである
The purpose is to obtain a highly reliable heat dissipation metal plate. [Means for solving the problem] Normally, when drawing a metal plate into a rectangular or square shape, the deformation of the four corners of the rectangle or square is complicated. And the stress is also great. Therefore, when drawing a laminate made of a plurality of metal plates and metal foils bonded together via insulating layers, the insulation between the metal plates and the metal foils is broken at the four corners. In the heat dissipation metal plate according to the present invention, in order to prevent the above dielectric breakdown, the metal foil is removed from areas where deformation stress is large.

〔作用〕[Effect]

この発明における放熱金属板は加工時の変形、応力の大
きい部位での、金属板と金属箔の積層を避けることによ
り、絶縁の信頼度の高い放熱金属板を得られる。
In the heat dissipating metal plate of the present invention, by avoiding deformation during processing and lamination of the metal plate and metal foil in areas where stress is large, a heat dissipating metal plate with high insulation reliability can be obtained.

〔実施例〕 以下、この発明の一実施例を図によって説明する。第1
図は放熱金属板の正面図、第2図は第1図の放熱金属板
の右側面図、第3図は第1図に示すA−Aにおける断面
図である。図において(1)〜(3)は第4図及び第5
図の従来例に示したものと同等であるので説明を省略す
る。(4)は金属箔(3)に設けた金属箔の穴である。
[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
2 is a right side view of the heat radiating metal plate of FIG. 1, and FIG. 3 is a sectional view taken along line A-A shown in FIG. 1. In the figure, (1) to (3) are shown in Figures 4 and 5.
Since this is the same as that shown in the conventional example in the figure, the explanation will be omitted. (4) is a metal foil hole provided in metal foil (3).

放熱金属板の中央部分に施される絞り加工により、正方
形状のへこみが設けられており、正方形状のへこみの4
隅の部分には、金属箔の穴(4)が設けられている。す
なわち、上記絞り加工部に金属N(3)が、干渉しない
よう、金属箔(3)を除去しである。
Square-shaped depressions are created by drawing in the center of the heat-dissipating metal plate, and four of the square-shaped depressions
Metal foil holes (4) are provided in the corners. That is, the metal foil (3) is removed so that the metal N (3) does not interfere with the drawn portion.

次に動作について説明する。金属板(1)、絶縁層(2
)、金属箔(3)の貼合せた放熱金属板を絞り加工する
場合、最も力を受け、しかも変影響の大きい。
Next, the operation will be explained. Metal plate (1), insulating layer (2
), when drawing the heat dissipating metal plate laminated with the metal foil (3), it receives the most force and has a large changing effect.

部位で、金属箔(3)が存在しないため、仮りに、樹脂
による絶縁層C)がその箇所で破壊されたとしても、放
熱金属板の機能を損うことはない。
Since the metal foil (3) is not present at that location, even if the resin insulating layer C) is destroyed at that location, the function of the heat dissipation metal plate will not be impaired.

なお、上記実施例では金属箔の穴(4)を絞り加工前に
設けた場合について説明したが、金属箔の穴(4)は絞
り加工後、化学的な手段で設けてもよい。
In addition, in the above embodiment, a case has been described in which the holes (4) in the metal foil are provided before the drawing process, but the holes (4) in the metal foil may be provided by chemical means after the drawing process.

〔発明の効果〕〔Effect of the invention〕

以上のようにこの発明によれば、信頼性の高い放熱金属
板が得られる。
As described above, according to the present invention, a highly reliable heat dissipating metal plate can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の一実施例による放熱金属板の正面図
、第2図は第1図の放熱金属板の右側面図、第3図は第
1図に示すA−Aにおける断面図、第4図は従来の放熱
金属板を示す正面図、第5図は第4図の放熱金属板の右
側面図である。 図において、(1)は金属板、(2)は絶縁層、(3)
は金属箔、(4)は金属箔の穴である。 なお、図中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a front view of a heat dissipation metal plate according to an embodiment of the present invention, FIG. 2 is a right side view of the heat dissipation metal plate of FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A shown in FIG. FIG. 4 is a front view of a conventional heat dissipating metal plate, and FIG. 5 is a right side view of the heat dissipating metal plate of FIG. In the figure, (1) is a metal plate, (2) is an insulating layer, and (3)
is a metal foil, and (4) is a hole in the metal foil. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】 熱伝導性のよい金属板とこの金属板の片面に樹脂による
絶縁層と金属箔を交互に貼り合せた層を少なくとも1つ
貼り合せた放熱の金属板の中央部付近を、矩形状又は正
方形状に絞り加工を施し、へこみを設けた放熱金属板に
おいて、上 記絞り加工を施す部分の矩形又は正方形の4隅の部分の
金属箔を除去した事を特徴とする放熱金属板。
[Claims] A metal plate with good thermal conductivity and at least one layer of an insulating layer made of resin and a metal foil laminated alternately on one side of the metal plate for heat dissipation. , a heat dissipating metal plate that has been drawn into a rectangular or square shape and provided with a recess, characterized in that the metal foil at the four corners of the rectangle or square where the drawing process is applied has been removed. .
JP4798390A 1990-02-27 1990-02-27 Heat dissipation metal plate Expired - Fee Related JP2697229B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4798390A JP2697229B2 (en) 1990-02-27 1990-02-27 Heat dissipation metal plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4798390A JP2697229B2 (en) 1990-02-27 1990-02-27 Heat dissipation metal plate

Publications (2)

Publication Number Publication Date
JPH03248550A true JPH03248550A (en) 1991-11-06
JP2697229B2 JP2697229B2 (en) 1998-01-14

Family

ID=12790551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4798390A Expired - Fee Related JP2697229B2 (en) 1990-02-27 1990-02-27 Heat dissipation metal plate

Country Status (1)

Country Link
JP (1) JP2697229B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8446727B2 (en) 2008-05-08 2013-05-21 Toyota Jidosha Kabushiki Kaisha Electronic component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8446727B2 (en) 2008-05-08 2013-05-21 Toyota Jidosha Kabushiki Kaisha Electronic component

Also Published As

Publication number Publication date
JP2697229B2 (en) 1998-01-14

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