JP2000516043A - パワーハイブリッド集積回路 - Google Patents

パワーハイブリッド集積回路

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Publication number
JP2000516043A
JP2000516043A JP51743298A JP51743298A JP2000516043A JP 2000516043 A JP2000516043 A JP 2000516043A JP 51743298 A JP51743298 A JP 51743298A JP 51743298 A JP51743298 A JP 51743298A JP 2000516043 A JP2000516043 A JP 2000516043A
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Prior art keywords
integrated circuit
board
power hybrid
recess
hybrid integrated
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JP51743298A
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JP3391462B2 (ja
Inventor
イオフダルスキー,ビクトル・アナトーリエビッチ
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サムソン・エレクトロニクス・カンパニー・リミテッド
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Abstract

(57)【要約】 回路は、そのおもて面にトポロジー的な金属被覆パターン(2)を備える両面金属被覆の誘電体ボード(1)を備える。少なくとも1つの実装パッド(3)が、ヒートシンク(5)にボード(1)のおもて面のくぼみ(4)の中に位置決めしている。裸の電子チップ(9)は、そのおもて面がトポロジー的な金属被覆パターン(2)と同一平面上であるように、実装パッド(3)に配置して固定する。ヒートシンク(5)は、本質的に、くぼみ(4)の底に設けて熱伝導性の材料(10)で満たしたブラインド穴(6)のシステムである。ブラインド穴(6)の底の残りの厚さが、1μm〜999μmである。チップ(9)とくぼみ(4)の側壁との間のスペースが、少なくとも部分的に熱伝導性のバインダー(10)で満たしている。ボード(1)の裏面は、熱伝導性のベース(7)と結合している。

Description

【発明の詳細な説明】 パワーハイブリッド集積回路技術分野 本発明は、一般に、電子工学に関し、特に、パワーハイブリッド集積回路に関 する。背景技術 従来技術のパワーハイブリッド集積回路として、トポロジー的な金属被覆パタ ーンとたくさんのくぼみを有する誘電体ボードを備えるものが、知られている( US,A,4,737,235)。半導体チップが、バインダーによって固定され 、その結果、ボンディングパッドを有するチップの表面がボード表面と同一平面 上にあり、チップボンディングパッドは、トポロジー的な金属被覆パターンと電 気的に接続する。 上述の回路構造は、チップから基板への伝熱が小さい領域を有し、それゆえに 、熱消散容量が不十分である。 従来技術ハイブリッド集積回路として、さらに、以下のものが知られている( EP,A,0334397)。すなわち、おもて面にトポロジー的な金属被覆パタ ーンと、本質的にくぼみ底の穴のシステムであるヒートシンクにおもてのボード 面のくぼみに位置する少なくとも1つの実装パッドとを有する両面金属被覆した 誘電体ボードを備え、その穴は熱伝導性の材料で満たしている。ボードは、熱伝 導性のベースにその裏面で取り付けられ、裸の電子チップは、実装パッドのくぼ みに配置して固定している。その結果、チップおもて面は、トポロジー的な金属 被覆パターンと同一平面上にある。 この回路構造は、半導体デバイスの幅広い範囲で使用することができない。発明の概要 本発明の主たる目的は、チップからの熱消散状態を改良することができるヒー トシンクの構造上の配置を有するパワーハイブリッド集積回路を提供することで ある。 前述の目的が、以下のことによって達成される。すなわち、パワーマイクロ波 ハイブリッド集積回路において、そのおもて面にトポロジー的な金属被覆パター ンと、熱伝導性の材料で満たして本質的にくぼみ底の穴のシステムであるヒート シンク上にボードおもて面のくぼみに位置決めした少なくとも1つの実装パッド とを備える両面金属被覆の誘電体ボードを備える。ボードは、熱伝導性のベース にその裏面で結合して、裸の電子回路チップは、実装パッドのくぼみに配置して 固定している。その結果、チップおもて面は、トポロジー的な金属被覆パターン と同一平面上にあり、くぼみの底のヒートシンク穴がブラインドであり、前記ブ ラインド穴の底の残りの厚さが、1μm〜999μmであり、チップとくぼみの 側壁との間のスペースは、少なくとも部分的に熱伝導性の材料で満たしている。 実装パッドの中に形成して熱伝導性のバインダーで満たしたボードのブライン ド穴のシステムの中に熱伝導性のエレメントを配置することにより、以下のこと が可能になる。すなわち、共通のエミッタ又は共通ベースの二極式の接合トラン ジスタを組み込むことができる回路を備え、そこからの熱消散をそのままにした 状態でチップを電気的絶縁することによってボードに組み込まれたコンデンサー として、くぼみの金属被覆とシールド金属被覆との間のギャップを用いる可能性 によって、提案した回路の応用の領域を同時に広げることができる。 チップとくぼみの側壁との間のスペースを少なくとも部分的に熱伝導性のバイ ンダーで満たすことによって、伝熱領域が増大して、チップからの熱消散が良く なる。 シールド接地金属被覆からチップの電気的絶縁を与えるために、ブラインド穴 底の残りの厚さの下限が、必要に応じて決まるが、その上限は、伝熱領域を増大 して伝熱条件を改良するという最低限の到達できる効果によって決まる。 くぼみの底のブラインド穴の間にボードの裏面に形成し、熱伝導性の材料で満 たした対向するブラインド穴を設けることによって、伝熱領域が増大して、チッ プからの熱消散の速度が増大する。ブラインド穴の間の残りの誘電体厚みは、1 μm〜500μmである。 ブラインド穴の間の誘電体の残りの厚さの下限は、シールド接地金属被覆から チップの電気的絶縁を与える必要性によって決まるが、その上限は、チップから 熱伝導性ベースへの伝熱を改良するという最低限の到達できる効果によって決ま る。 面格子の形でブラインド穴のシステムを設けることによって、熱接触領域が増 大して、チップからの熱消散が良くなる。 熱伝導性の材料で満たしたブラインドスロットを設けて、くぼみ周辺部に沿っ てボードおもて面に位置することによって、熱接触領域が増大して、チップから の熱消散が良くなる。 くぼみ,ブラインド穴,ブラインドスロットを金属被覆することは、ぬれ性に よって熱伝導性の材料が容易に満たされて、熱接触を促進する。図面の簡単な説明 本発明は、いくつかの代表的な実施形態について添付の図面を参照して説明す る。 図1は、パワーハイブリッド集積回路の断面図である。 図2は、ボードの裏面にブラインド穴をもつパワーハイブリッド集積回路の断 面図である。 図3a及び図3bは、面格子の形のくぼみの底にブラインド穴のシステムを有 するパワーハイブリッド集積回路のボードの断面図及び平面図である。 図4は、くぼみのおもて面にさらにブラインド穴と面格子の形のボードの裏面 にブラインド穴のシステムとをもつパワーハイブリッド集積回路の断面図である 。 図5は、くぼみの周辺部に沿ってブラインドスロットをもつパワーハイブリッ ド集積回路の平面図である。詳細な説明 本発明によるパワーマイクロ波ハイブリッド集積回路は、例えば、ポリコール からなり、両面に金属被覆した誘電体ボード1(図1)を備える。ボード1は、 トポロジー的な金属被覆パターン2をそのおもて面に有し、その金属被覆は、T i(100オーム/平方mm)−Pd(0.2μm)−Au(3μm)、又はCr (100オーム/平方mm)−Cu(1μm)−Cu(電気化学的に3μmを形 成)−Ni(0.6μm)−Au(3μm)の構成を有する。 ボード1は、ヒートシンク5上に0.6mm×0.55mm×0.33mmの くぼみ4に位置する1つの実装パッド3を有する。ヒートシンクは、本質的に、 例えば、0.1mmの直径と0.2mmのピッチとを有するボード1のブライン ド穴6のシステムである。複数の実装パッド3を備える。 例えば、合金 エム・デー−50(MД−50)から作成した熱伝導性のベー ス7は、以下の構成のコーティングを備える。すなわち、Ni(0.6μm)− Au(3μm)が、例えば、ロウ付けによってボード1の裏面の金属被覆8と結 合する。裸の電子チップ9、例えば、0.5mm×0.15mm×0.3mmの トランジスタ3ペー603ベー−5(3Π603Б−5)のチップは、熱伝導性 のバインダー10、例えば、共晶Au−Siの硬合金によって、実装パッド3と くぼみ4の側面11とに結合する。そして、それらは、例えば、30μmの直径 を有する金ワイヤー12によって金属被覆パターン2と電気的に接続している。 熱伝導性のバインダー10が、ブラインド穴6を満たし、少なくとも部分的に、 チップ9とくぼみ4の側壁との間のスペースを満たす。ブラインド穴6の底の残 りの厚さは、100μmに選択している。 ボード1(図2)の裏面は、ブラインド穴6の間にくぼみ4の底に形成した対 向するブラインド穴13を有し、前記穴13は、例えば、直径50μmであり、 Au‐Siの硬ハンダのような熱伝導性の材料10で満たしている。ブラインド 穴13間の誘電体の残りの厚さは、50μmである。 くぼみ4の底のブラインド穴6(図3a,図3b)のシステムは、例えば、厚 さ0.1mmでピッチ0.2mmの溝を有する面格子の形である。 追加のブラインド穴14(図4)は、くぼみ4の側面に設ける。ブラインド穴 15のシステムは、幅50μm,ピッチ0.25mmで配置した溝を有する面格 子の形でボード1の裏面に設ける。 ブラインドスロット16(図5)は、くぼみ4の周辺部に沿ってボード1のお もて面に設ける。例えば、0.05mm×0.5mm×0.3mmの大きさを有 する前記スロットは、熱伝導性の材料10で満たしている。 くぼみ4と、ブラインド穴6,13,14,15と、スロット16とは金属被覆 さ れ、金属被覆の構造は、例えば、Pd−Ni(0.2μm)−Au(3μm)の ようになっている。 本発明による、パワーハイブリッド集積回路は、以下のように作用する。 トランジスタが動作すると、くぼみ4(図1)の底の残りの厚さに設けた熱消 散システム及びくぼみ4の側壁によって熱を放散するが、そのことは、より効率 的な熱拡散に寄与してトランジスタの動作時の信頼性が増す。 ボード1と熱伝導性のベース7によってチップ9からの熱の消散が維持される か、さらに増大する間、本願のパワーハイブリッド集積回路を用いることによっ て、電子チップ9デバイスの電気的絶縁を得ることができる。 本発明のいくらかの好ましい実施形態を前述の説明の中で開示したけれども、 本発明の精神と範囲とから逸脱しない範囲内で、いろいろな修正と改良が行なえ ると理解される。

Claims (1)

  1. 【特許請求の範囲】 1.そのおもて面にトポロジー的な金属被覆パターン(2)と、本質的にくぼみ (4)の底のブラインド穴(6)のシステムであり、熱伝導性の材料(10)で 満たしたヒートシンク(5)上にボード(1)のおもて面のくぼみ(4)に位置 決めした少なくとも1つの実装パッド(3)とを有する、両面を金属被覆した誘 電体ボード(1)を備え、ボード(1)がその裏面で熱伝導性のベース(7)と 結合しており、裸の電子チップ(9)はくぼみ(4)の実装パッド(3)に配置 して固定し、その結果、チップ(9)のおもて面がトポロジー的な金属被覆パタ ーン(2)と同一平面上にあるパワーハイブリッド集積回路において、 くぼみ(4)の底のヒートシンク(5)の穴(6)がブラインドであり、前記 ブラインド穴(6)の底の残りの厚さが1μm〜999μmであり、くぼみ(4 )のチップ(9)と側壁との間のスペースは、少なくとも部分的に熱伝導性の材 料(10)で満たしていることを特徴とするパワーハイブリッド集積回路。 2.対向するブラインド穴(13)は、くぼみ(4)の底のブラインド穴(6) の間にボード(1)の裏面に設けており、前記穴(13)は熱伝導性の材料(1 0)で満たしており、ブラインド穴(13)間の残りの誘電体厚さが1μm〜5 00μmであることを特徴とする請求項1記載のパワーハイブリッド集積回路。 3.くぼみ(4)の底のブラインド穴(6)のシステムが、面格子の形であるこ とを特徴とする請求項1又は請求項2記載のパワーハイブリッド集積回路。 4.ブラインド穴(14)は、くぼみ(4)の側面にさらに設けることを特徴と する請求項1,請求項2,又は請求項3記載のパワーハイブリッド集積回路。 5.ボード(1)の裏面に設けたブラインド穴(15)システムが、面格子の形 であることを特徴とする請求項1,請求項2,又は請求項3記載のパワーハイブリ ッド集積回路。 6.熱伝導性の材料(10)で満たしたブラインドスロット(16)は、くぼみ (4)の周辺部に沿ってボード(1)のおもて面に設けていることを特徴とする 請求項1,請求項2,又は請求項3記載のパワーハイブリッド集積回路。 7.くぼみ(4)と,ブラインド穴(6,13,14,15)と、スロット(16) とは、金属被覆していることを特徴とする請求項1又は請求項2記載のパワーハ イブリッド集積回路。 8.くぼみ(4)と,ブラインド穴(6,13,14,15)と、スロット(16) とは、金属被覆していることを特徴とする請求項4記載のパワーハイブリッド集 積回路。 9.くぼみ(4)と、ブラインド穴(6,13,14,15)と、スロット(16 )とは、金属被覆していることを特徴とする請求項5記載のパワーハイブリッド 集積回路。 10.くぼみ(4)と,ブラインド穴(6,13,14,15)と,スロット(16 )とは、金属被覆していることを特徴とする請求項6記載のパワーハイブリッド 集積回路。
JP51743298A 1996-10-10 1996-10-10 パワーハイブリッド集積回路 Expired - Fee Related JP3391462B2 (ja)

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