JP5417737B2 - Inertial force sensor - Google Patents

Inertial force sensor Download PDF

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JP5417737B2
JP5417737B2 JP2008112345A JP2008112345A JP5417737B2 JP 5417737 B2 JP5417737 B2 JP 5417737B2 JP 2008112345 A JP2008112345 A JP 2008112345A JP 2008112345 A JP2008112345 A JP 2008112345A JP 5417737 B2 JP5417737 B2 JP 5417737B2
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chip
substrate
input
wiring pattern
output
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JP2009264820A (en
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剛 阪上
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Panasonic Corp
Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • 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
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
    • 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
    • H01L2224/73265—Layer and wire connectors

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Description

本発明は、航空機、自動車、ロボット、船舶、車両等の移動体の姿勢制御やナビゲーション等、各種電子機器に用いる慣性力センサに関するものである。   The present invention relates to an inertial force sensor used in various electronic devices such as attitude control and navigation of moving bodies such as airplanes, automobiles, robots, ships and vehicles.

以下、従来の慣性力センサについて説明する。   Hereinafter, a conventional inertial force sensor will be described.

図７は従来の慣性力センサの一つである角速度センサの断面図である。   FIG. 7 is a sectional view of an angular velocity sensor which is one of conventional inertial force sensors.

本角速度センサは、角速度センサ素子１と、角速度センサ素子１が出力する電気信号を処理して印加された角速度の大きさ及び方向を求めるための処理回路を有する集積回路チップ２と、処理回路における処理に必要なデータを保持する記憶素子チップ３と、角速度センサ素子１、集積回路チップ２、記憶素子チップ３を実装するパッケージ４とを備える。   The angular velocity sensor includes an angular velocity sensor element 1, an integrated circuit chip 2 having a processing circuit for determining the magnitude and direction of an applied angular velocity by processing an electrical signal output from the angular velocity sensor element 1, and a processing circuit A storage element chip 3 that holds data necessary for processing, an angular velocity sensor element 1, an integrated circuit chip 2, and a package 4 on which the storage element chip 3 is mounted are provided.

このパッケージ４には、中心に凹所５が設けられ、凹所５の内周面には段差部７が設けられ、凹所５の開口面に対して天面の面積が狭くなっている。そして、角速度センサ素子１を接着剤により凹所５の天面に固定するとともに凹所５内に形成した電極と角速度センサ素子１に形成した電極とをワイヤボンディングによって接続し、凹所５を塞ぐように記憶素子チップ３を接着剤により凹所５に固定するとともに凹所５内に形成した電極と記憶素子チップ３に形成した電極とをワイヤボンディングによって接続し、開口を塞ぐように集積回路チップ２を接着剤により開口端面に固定するとともに開口端面に形成した電極と集積回路チップ２に形成した電極とをワイヤボンディングによって接続している。さらに、集積回路チップ２を被覆するカバー部８を設け、このカバー部８を実装基板９に実装している。このとき、カバー部８と実装基板９とは半田バンプ１０を介して電気的に接続している。   In this package 4, a recess 5 is provided at the center, a stepped portion 7 is provided on the inner peripheral surface of the recess 5, and the area of the top surface is narrower than the opening surface of the recess 5. Then, the angular velocity sensor element 1 is fixed to the top surface of the recess 5 with an adhesive, and the electrode formed in the recess 5 and the electrode formed in the angular velocity sensor element 1 are connected by wire bonding to close the recess 5. In this way, the memory element chip 3 is fixed to the recess 5 with an adhesive, and the electrode formed in the recess 5 and the electrode formed in the memory element chip 3 are connected by wire bonding to close the opening. 2 is fixed to the opening end face with an adhesive, and the electrode formed on the opening end face and the electrode formed on the integrated circuit chip 2 are connected by wire bonding. Further, a cover portion 8 that covers the integrated circuit chip 2 is provided, and the cover portion 8 is mounted on the mounting substrate 9. At this time, the cover portion 8 and the mounting substrate 9 are electrically connected via the solder bumps 10.

このような角速度センサを検出したい検出軸に対応させて、車両等の移動体の姿勢制御装置やナビゲーション装置等に用いている。   Such an angular velocity sensor is used in a posture control device or a navigation device of a moving body such as a vehicle in correspondence with a detection axis to be detected.

なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１が知られている。
特開２００３−３４４４３９号公報 As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2003-344439 A

上記構成では、角速度センサ素子１と集積回路チップ２と記憶素子チップ３とが互いに同一軸上に重畳されるので実装面積を低減できるが、各々の面上に直接積層されていないので、重畳方向の高さを抑制できず、低背化を図れない。 In the above configuration, the angular velocity sensor element 1, the integrated circuit chip 2, and the memory element chip 3 are superimposed on the same axis, so that the mounting area can be reduced. However, since they are not directly stacked on each surface, The height cannot be suppressed and the height cannot be reduced .

本発明は上記問題点を解決するもので、ＩＣチップと素子と基板との重畳方向の低背化および小型化を図れるセンサを提供することを目的としている。 The present invention solves the above-described problems, and an object thereof is to provide a sensor capable of reducing the height and size of an IC chip, an element, and a substrate in the overlapping direction .

上記目的を達成するために本発明は、特に、ＩＣチップは表面または裏面のいずれか一方の面に配置した入出力電極を有し、素子は表面または裏面のいずれかの面に配置した入出力電極を有し、基板の裏面に配置した金属配線パターンを有し、前記ＩＣチップの入出力電極と前記基板の金属配線パターンとをワイヤボンディングまたは金属バンプにより電気的に接続し、前記ＩＣチップの入出力電極と前記素子の入出力電極とをワイヤボンディングまたは金属バンプにより電気的に接続し、前記パッケージは段差部を有し、前記基板は、前記素子および前記ＩＣチップを載置する載置部と、前記載置部の外周に配置した接続部と、を有し、前記基板は、前記載置部を中空保持させつつ前記接続部を前記段差部に接続し、前記パッケージの底面部と前記基板との間に前記段差部の高さ以下の電子部品を配置し、前記載置部および前記接続部は絶縁フィルムで形成し、前記載置部の裏面と前記接続部の裏面との間に前記金属配線パターンを接着配置し、前記金属配線パターンはＭｇとＣｕの合金またはＡｌとＣｕの合金を用いた構成である。 In order to achieve the above object, the present invention particularly provides that an IC chip has input / output electrodes disposed on either the front surface or the back surface, and the element is input / output disposed on either the front surface or the back surface. An electrode, and a metal wiring pattern disposed on the back surface of the substrate, wherein the input / output electrodes of the IC chip and the metal wiring pattern of the substrate are electrically connected by wire bonding or metal bumps, The input / output electrodes and the input / output electrodes of the element are electrically connected by wire bonding or metal bumps, the package has a stepped portion, and the substrate has a mounting portion on which the element and the IC chip are mounted. And a connecting portion disposed on an outer periphery of the mounting portion, and the substrate connects the connecting portion to the stepped portion while holding the mounting portion hollow, and a bottom surface of the package. And the height below the electronic components of the step portion is arranged between the substrate and the mounting section and the connecting portion between the rear surface of the connecting portion and formed in the insulating film, the rear surface of the mounting section The metal wiring pattern is bonded between the metal wiring patterns, and the metal wiring pattern is made of an alloy of Mg and Cu or an alloy of Al and Cu .

上記構成により、ＩＣチップと素子と基板との重畳方向の間隔を狭めることができ高さを抑制できるとともに、パッケージ内における配線の引き廻しに必要な面積も低減でき、小型化を図ることができる。 With this configuration, it is possible to suppress the height can reduce the distance of the overlapping direction of the I C chip and the element and the substrate, can also be reduced area required for wiring of the pull turn in the package, it is downsized Can do.

また、ＩＣチップの入出力電極と基板の金属配線パターンとをワイヤボンディングにより電気的に接続するとともに、ＩＣチップの入出力電極と素子の入出力電極とを金属バンプにより電気的に接続する、または、ＩＣチップの入出力電極と基板の金属配線パターンとを金属バンプにより電気的に接続するとともにＩＣチップの入出力電極と素子の入出力電極とをワイヤボンディングにより電気的に接続しているので、ＩＣチップと素子と基板とは、互いに重畳するように、基板にＩＣチップを積層し、このＩＣチップに素子を積層したり、基板を挟むようにして、基板の表面に素子を積層し、基板の裏面にＩＣチップを積層したりしても、互いの電気的な接続とその固定が可能となる。 In addition , the input / output electrodes of the IC chip and the metal wiring pattern of the substrate are electrically connected by wire bonding, and the input / output electrodes of the IC chip and the input / output electrodes of the element are electrically connected by metal bumps. Alternatively, the input / output electrodes of the IC chip and the metal wiring pattern of the substrate are electrically connected by metal bumps, and the input / output electrodes of the IC chip and the input / output electrodes of the element are electrically connected by wire bonding. The IC chip, the element, and the substrate are stacked on the substrate such that the IC chip, the element, and the substrate overlap with each other, and the elements are stacked on the IC chip or the substrate is sandwiched between the elements. Even if an IC chip is stacked on the back surface, it is possible to electrically connect and fix each other.

特に、ＩＣチップと素子またはＩＣチップと基板とは金属バンプにより金属接合されるので、この接合によってＩＣチップと素子との固定と電気的な接続が同時に行なえる。すなわち、ＩＣチップとの固定において液状樹脂を介在させる際、ＩＣチップと素子またはＩＣチップと基板とは基本的に金属バンプによって固定され、液状樹脂は補強として少量を用いればよく、また、金属バンプの厚みによってＩＣチップや素子の面上における液状樹脂の広がりも規制される。よって、ＩＣチップや素子の面上を液状樹脂が意図しない範囲まで広がって入出力電極を被覆し電極機能を損なったりすることもない。   In particular, since the IC chip and the element or the IC chip and the substrate are metal-bonded by metal bumps, the IC chip and the element can be fixed and electrically connected simultaneously by this bonding. That is, when a liquid resin is interposed in fixing to the IC chip, the IC chip and the element or the IC chip and the substrate are basically fixed by metal bumps, and the liquid resin may be used in a small amount as a reinforcement. The spread of the liquid resin on the surface of the IC chip or element is also regulated by the thickness of the substrate. Therefore, the liquid resin does not spread over the surface of the IC chip or the element to an unintended range to cover the input / output electrodes, and the electrode function is not impaired.

図１は本発明の一実施の形態における慣性力センサの一つである角速度センサの分解斜視図、図２は同角速度センサの斜視図、図３は図２のＡ−Ａ断面図、図４は同角速度センサの基板の上面図、図５は同角速度センサの基板の下面図である。   1 is an exploded perspective view of an angular velocity sensor that is one of inertial force sensors according to an embodiment of the present invention, FIG. 2 is a perspective view of the angular velocity sensor, FIG. 3 is a cross-sectional view taken along line AA in FIG. Is a top view of the substrate of the angular velocity sensor, and FIG. 5 is a bottom view of the substrate of the angular velocity sensor.

図１、図２において、本発明の一実施の形態における角速度センサは、音叉形状等の振動子からなる振動型の角速度検出用の素子３２と、この素子３２から出力される出力信号を処理するＩＣチップ３４と、素子３２とＩＣチップ３４とを載置する基板３５と、これら素子３２およびＩＣチップ３４を載置する基板３５と、信号処理用のコンデンサ３６と、これらを収納するパッケージ３８、蓋３９とを備えている。   1 and 2, an angular velocity sensor according to an embodiment of the present invention processes a vibration type angular velocity detecting element 32 formed of a vibrator having a tuning fork shape and the like, and an output signal output from the element 32. An IC chip 34, a substrate 35 for mounting the element 32 and the IC chip 34, a substrate 35 for mounting the element 32 and the IC chip 34, a signal processing capacitor 36, and a package 38 for storing them. And a lid 39.

この基板３５は、素子３２およびＩＣチップ３４を載置する載置部４０と、載置部４０の外周に配置し、パッケージ３８の内壁と接続する接続部４１とを有し、載置部４０を中空保持させつつ基板３５をパッケージ３８に収納している。また、基板３５は、図４、図５に示すように、載置部４０および接続部４１をポリイミド絶縁フィルムで形成し、この絶縁フィルムに金属配線パターン４２を接着配置したＴＡＢテープからなり、図３に示すように、パッケージ３８の底面部に設けた段差部４７に基板３５の外周の接続部４１を載置して、パッケージ３８の内壁と接続している。載置部４０を中空保持させているので、この空間を利用して、パッケージ３８の底面に段差部４７の高さ以下のコンデンサ３６を配置している。   The substrate 35 includes a placement portion 40 on which the element 32 and the IC chip 34 are placed, and a connection portion 41 that is disposed on the outer periphery of the placement portion 40 and is connected to the inner wall of the package 38. The substrate 35 is housed in the package 38 while holding the substrate hollow. As shown in FIGS. 4 and 5, the substrate 35 is formed of a TAB tape in which the mounting portion 40 and the connection portion 41 are formed of a polyimide insulating film, and a metal wiring pattern 42 is bonded to the insulating film. As shown in FIG. 3, a connection portion 41 on the outer periphery of the substrate 35 is placed on a stepped portion 47 provided on the bottom surface portion of the package 38 and connected to the inner wall of the package 38. Since the mounting portion 40 is held hollow, the capacitor 36 having a height equal to or less than the height of the stepped portion 47 is disposed on the bottom surface of the package 38 using this space.

また、図２、図３に示すように、角速度検出用の素子３２、ＩＣチップ３４は、入出力信号用として、各々、入出力電極４８、入出力電極５０を有する。素子３２は、その表面または裏面のいずれかの面に配置した入出力電極４８を介して電気的に接続し、ＩＣチップ３４は、その表面または裏面のいずれか一方の面にのみ配置した入出力電極５０を介して電気的に接続し、基板３５は、その表面または裏面のいずれかの面に配置した金属配線パターン４２を介して電気的に接続している。この図３においては、素子３２は裏面に入出力電極４８が配置され、ＩＣチップ３４はその表面に入出力電極５０が配置され、基板３５はその裏面に金属配線パターン４２が配置されている。   As shown in FIGS. 2 and 3, the angular velocity detecting element 32 and the IC chip 34 have an input / output electrode 48 and an input / output electrode 50, respectively, for input / output signals. The element 32 is electrically connected via an input / output electrode 48 disposed on either the front surface or the back surface, and the IC chip 34 is input / output disposed only on either the front surface or the back surface. The substrate 35 is electrically connected via the electrode 50, and the substrate 35 is electrically connected via a metal wiring pattern 42 disposed on either the front surface or the back surface. In FIG. 3, an input / output electrode 48 is disposed on the back surface of the element 32, an input / output electrode 50 is disposed on the front surface of the IC chip 34, and a metal wiring pattern 42 is disposed on the back surface of the substrate 35.

そして、このＩＣチップ３４の入出力電極５０と基板３５の金属配線パターン４２とをワイヤ５４を介してワイヤボンディングにより電気的に接続するとともに、ＩＣチップ３４の入出力電極５０と素子３２の入出力電極４８とを金属バンプ５５により電気的に接続し、基板３５の金属配線パターン４２とパッケージ３８の電極とを金属バンプ５５により電気的に接続し、信号の入出力を行っている。   The input / output electrode 50 of the IC chip 34 and the metal wiring pattern 42 of the substrate 35 are electrically connected via wire 54 by wire bonding, and the input / output of the input / output electrode 50 of the IC chip 34 and the element 32 is input / output. The electrodes 48 are electrically connected by the metal bumps 55, and the metal wiring patterns 42 of the substrate 35 and the electrodes of the package 38 are electrically connected by the metal bumps 55 to input / output signals.

さらに、ＩＣチップ３４と素子３２と基板３５とは、互いに重畳するように、液状樹脂５６を介在させて硬化させるとともに金属バンプ５５を金属接合させて固定している。具体的な固定方法については、金属バンプ５５としてＡｕ等を用いてＡｕ−Ａｕ金属接合により固定したり、液状樹脂５６として流動性のある異方性導電フィルムを用いてＡＣＦ法により固定したりすればよく、その他、液状樹脂５６と金属バンプ５５を用いて種々の方法により固定が可能である。   Further, the IC chip 34, the element 32, and the substrate 35 are fixed with a liquid resin 56 interposed therebetween so as to overlap each other, and the metal bumps 55 are fixed by metal bonding. As for a specific fixing method, the metal bump 55 is fixed by Au-Au metal bonding using Au or the like, or the liquid resin 56 is fixed by an ACF method using a fluid anisotropic conductive film. In addition, it can be fixed by various methods using the liquid resin 56 and the metal bump 55.

このような角速度センサを検出したい検出軸に対応させて、車両等の移動体の姿勢制御装置やナビゲーション装置等に用いている。   Such an angular velocity sensor is used in a posture control device or a navigation device of a moving body such as a vehicle in correspondence with a detection axis to be detected.

上記構成により、ＩＣチップ３４と素子３２と基板３５とは、互いに重畳するように、液状樹脂５６を介在させて硬化させるとともに金属バンプ５５を金属接合させて固定するので、ＩＣチップ３４と素子３２と基板３５との重畳方向の間隔を狭めることができ高さを抑制できるとともに、金属バンプ５５による電気的な接続により、ワイヤボンディングが不要となり、ＩＣチップ３４や素子３２の形状幅を広くする必要がなくなり、また、パッケージ３８内における配線の引き廻しに必要な面積も低減でき、小型化を図ることができる。   With the above configuration, the IC chip 34, the element 32, and the substrate 35 are cured by interposing the liquid resin 56 so as to overlap with each other, and the metal bumps 55 are fixed by metal bonding. The distance between the substrate 35 and the substrate 35 in the overlapping direction can be reduced, the height can be suppressed, and the electrical connection by the metal bumps 55 eliminates the need for wire bonding, and the IC chip 34 and the element 32 need to have a wider shape width. In addition, the area required for routing the wiring in the package 38 can be reduced, and the size can be reduced.

また、ＩＣチップ３４は、その表面または裏面のいずれか一方の面にのみ配置した入出力電極５０を介して電気的に接続し、素子３２は、その表面または裏面のいずれかの面に配置した入出力電極４８を介して電気的に接続し、基板３５は、表面または裏面のいずれかの面に配置した金属配線パターン４２を介して電気的に接続しており、ＩＣチップ３４の入出力電極５０と基板３５の金属配線パターン４２とをワイヤボンディングにより電気的に接続するとともにＩＣチップ３４の入出力電極５０と素子３２の入出力電極４８とを金属バンプ５５により電気的に接続しているので、ＩＣチップ３４と素子３２と基板３５とは、互いに重畳するように、基板３５にＩＣチップ３４を積層し、このＩＣチップ３４に素子３２を積層して、互いの電気的な接続とその固定が可能となる。   The IC chip 34 is electrically connected via the input / output electrode 50 disposed only on either the front surface or the back surface, and the element 32 is disposed on either the front surface or the back surface. The substrate 35 is electrically connected via an input / output electrode 48, and the substrate 35 is electrically connected via a metal wiring pattern 42 disposed on either the front surface or the back surface. 50 and the metal wiring pattern 42 of the substrate 35 are electrically connected by wire bonding, and the input / output electrodes 50 of the IC chip 34 and the input / output electrodes 48 of the element 32 are electrically connected by the metal bumps 55. The IC chip 34, the element 32, and the substrate 35 are stacked on the substrate 35 such that the IC chip 34, the element 32, and the substrate 35 overlap with each other, and the element 32 is stacked on the IC chip 34. The gas connection and its fixed becomes possible.

特に、ＩＣチップ３４と素子３２とは金属バンプ５５により金属接合されるので、この接合によってＩＣチップ３４と素子３２との固定と電気的な接続が同時になされる。すなわち、ＩＣチップ３４との固定において液状樹脂５６を介在させる際、ＩＣチップ３４と素子３２またはＩＣチップ３４と基板３５とは基本的に金属バンプ５５によって固定され、液状樹脂５６は補強として少量を用いればよく、また、金属バンプ５５の厚みによってＩＣチップ３４や素子３２の面上における液状樹脂５６の広がりも規制される。液状樹脂５６は硬化するまで流動性があるので、ＩＣチップ３４の面上に意図しない範囲まで広がって入出力電極５０を被覆し電極機能を損なう恐れがあるが、上記構成により、これを防ぐことができる。   Particularly, since the IC chip 34 and the element 32 are metal-bonded by the metal bump 55, the IC chip 34 and the element 32 are fixed and electrically connected simultaneously by this bonding. That is, when the liquid resin 56 is interposed in fixing to the IC chip 34, the IC chip 34 and the element 32 or the IC chip 34 and the substrate 35 are basically fixed by the metal bumps 55, and the liquid resin 56 has a small amount for reinforcement. Further, the spread of the liquid resin 56 on the surface of the IC chip 34 or the element 32 is regulated by the thickness of the metal bump 55. Since the liquid resin 56 is fluid until it cures, it may spread over an unintended range on the surface of the IC chip 34 to cover the input / output electrode 50 and impair the electrode function. However, the above configuration prevents this. Can do.

さらに、基板３５は、素子３２およびＩＣチップ３４を載置する載置部４０と、載置部４０の外周に配置し、パッケージ３８の内壁と接続する接続部４１とを有し、載置部４０を中空保持させつつ基板３５をパッケージ３８に収納しているので、外乱振動を抑制できる。特に、載置部４０および接続部４１は絶縁フィルムで形成し、この絶縁フィルムに金属配線パターン４２を接着配置しているので、金属配線パターン４２の剛性によって、効果的に外乱振動を抑制して検出精度を向上できる。例えば、金属配線パターン４２として、ヤング率の低い材料からなるＭｇとＣｕの合金やＡｌとＣｕの合金を用いてもよい。Ｃｕのヤング率は１１０ＧＰａであるが、Ｍｇ合金であれば４５ＧＰａとなり、Ａｌ合金であれば７０ＧＰａとなり、ヤング率が低くなる。ヤング率を低くすれば減衰特性が向上する。   Furthermore, the substrate 35 includes a placement portion 40 on which the element 32 and the IC chip 34 are placed, and a connection portion 41 that is disposed on the outer periphery of the placement portion 40 and is connected to the inner wall of the package 38. Since the substrate 35 is accommodated in the package 38 while holding 40 in a hollow state, disturbance vibration can be suppressed. In particular, the mounting portion 40 and the connection portion 41 are formed of an insulating film, and the metal wiring pattern 42 is adhered and disposed on the insulating film, so that the disturbance vibration is effectively suppressed by the rigidity of the metal wiring pattern 42. Detection accuracy can be improved. For example, as the metal wiring pattern 42, an alloy of Mg and Cu or an alloy of Al and Cu made of a material having a low Young's modulus may be used. The Young's modulus of Cu is 110 GPa. However, the Mg alloy is 45 GPa, and the Al alloy is 70 GPa, resulting in a low Young's modulus. Decreasing the Young's modulus improves the damping characteristics.

なお、本発明の実施の形態の構成に替えて、例えば、図６に示すように、ＩＣチップ３４の入出力電極５０と基板３５の金属配線パターン４２とを金属バンプ５５により電気的に接続するとともにＩＣチップ３４の入出力電極５０と素子３２の入出力電極４８とをワイヤボンディングにより電気的に接続し、基板３５を挟むようにして、基板３５の表面に素子３２を積層し、基板３５の裏面にＩＣチップ３４を積層したりしてもよい。この場合、ＩＣチップ３４と基板３５とは金属バンプ５５により金属接合されるので、この接合によってＩＣチップ３４と素子３２との固定と電気的な接続が同時になされる。   Instead of the configuration of the embodiment of the present invention, for example, as shown in FIG. 6, the input / output electrodes 50 of the IC chip 34 and the metal wiring pattern 42 of the substrate 35 are electrically connected by metal bumps 55. At the same time, the input / output electrode 50 of the IC chip 34 and the input / output electrode 48 of the element 32 are electrically connected by wire bonding, and the element 32 is stacked on the surface of the substrate 35 so as to sandwich the substrate 35. The IC chip 34 may be stacked. In this case, since the IC chip 34 and the substrate 35 are metal-bonded by the metal bumps 55, the IC chip 34 and the element 32 are fixed and electrically connected simultaneously by this bonding.

また、素子３２は角速度検出用に限らず、加速度検出用やその複合検出用であってもよい。   The element 32 is not limited to the angular velocity detection but may be an acceleration detection or a composite detection thereof.

本発明に係る慣性力センサは、樹脂接着剤が流動しても、電気的な接続が損なわれずに低背化を図れるので、各種電子機器に適用できるものである。   The inertial force sensor according to the present invention can be applied to various electronic devices because even if the resin adhesive flows, the electrical connection is not impaired and the height can be reduced.

本発明の一実施の形態における角速度センサの分解斜視図1 is an exploded perspective view of an angular velocity sensor according to an embodiment of the present invention. 同角速度センサの斜視図Perspective view of the same angular velocity sensor 図２のＡ−Ａ断面図AA sectional view of FIG. 同角速度センサの基板の上面図Top view of substrate of same angular velocity sensor 同角速度センサの基板の下面図Bottom view of substrate of same angular velocity sensor 他の角速度センサの断面図Cross section of other angular velocity sensor 従来の角速度センサの断面図Sectional view of a conventional angular velocity sensor

３２ 素子
３４ ＩＣチップ
３５ 基板
３６ コンデンサ
３８ パッケージ
３９ 蓋部
４０ 載置部
４１ 接続部
４２ 金属配線パターン
４７ 段差部
４８ 入出力電極
５０ 入出力電極
５４ ワイヤ
５５ 金属バンプ 32 elements 34 IC chip 35 substrate 36 capacitor 38 package 39 lid part 40 mounting part 41 connection part 42 metal wiring pattern 47 stepped part 48 input / output electrode 50 input / output electrode 54 wire 55 metal bump

Claims (4)

慣性力を検出する素子と、前記素子から出力される出力信号を処理するＩＣチップと、前記素子および前記ＩＣチップを載置した基板と、前記素子および前記ＩＣチップおよび前記基板を収納するパッケージを備え、
前記ＩＣチップは表面または裏面のいずれか一方の面に配置した入出力電極を有し、
前記素子は表面または裏面のいずれかの面に配置した入出力電極を有し、
前記基板の裏面に配置した金属配線パターンを有し、
前記ＩＣチップの入出力電極と前記基板の金属配線パターンとをワイヤボンディングまたは金属バンプにより電気的に接続し、
前記ＩＣチップの入出力電極と前記素子の入出力電極とをワイヤボンディングまたは金属バンプにより電気的に接続し、
前記パッケージは段差部を有し、
前記基板は、前記素子および前記ＩＣチップを載置する載置部と、前記載置部の外周に配置した接続部と、を有し、
前記基板は、前記載置部を中空保持させつつ前記接続部を前記段差部に接続し、
前記パッケージの底面部と前記基板との間に前記段差部の高さ以下の電子部品を配置し、
前記載置部および前記接続部は絶縁フィルムで形成し、
前記載置部の裏面と前記接続部の裏面との間に前記金属配線パターンを接着配置し、
前記金属配線パターンはＭｇとＣｕの合金またはＡｌとＣｕの合金を用いた慣性力センサ。 An element for detecting an inertial force; an IC chip for processing an output signal output from the element; a substrate on which the element and the IC chip are mounted; and a package for housing the element, the IC chip and the substrate. Prepared,
The IC chip has input / output electrodes arranged on either the front surface or the back surface,
The element has input / output electrodes arranged on either the front surface or the back surface,
Having a metal wiring pattern disposed on the back surface of the substrate;
The input / output electrodes of the IC chip and the metal wiring pattern of the substrate are electrically connected by wire bonding or metal bumps,
The input / output electrodes of the IC chip and the input / output electrodes of the element are electrically connected by wire bonding or metal bumps,
The package has a stepped portion;
The substrate has a placement portion for placing the element and the IC chip, and a connection portion disposed on the outer periphery of the placement portion,
The substrate connects the connection portion to the stepped portion while holding the mounting portion hollow,
An electronic component having a height equal to or lower than the stepped portion is disposed between the bottom surface of the package and the substrate ,
The mounting portion and the connection portion are formed of an insulating film,
The metal wiring pattern is adhered and arranged between the back surface of the mounting portion and the back surface of the connection portion,
The metal wiring pattern is an inertial force sensor using an alloy of Mg and Cu or an alloy of Al and Cu . 前記基板の表面に前記ＩＣチップを積層するとともに前記ＩＣチップに前記素子を積層し、前記ＩＣチップの入出力電極と前記基板の金属配線パターンとを前記ワイヤボンディングにより電気的に接続し、前記ＩＣチップの入出力電極と前記素子の入出力電極とを前記金属バンプを介して電気的に接続した請求項１記載の慣性力センサ。 The IC chip is laminated on the surface of the substrate and the element is laminated on the IC chip, and the input / output electrodes of the IC chip and the metal wiring pattern of the substrate are electrically connected by the wire bonding, and the IC The inertial force sensor according to claim 1, wherein an input / output electrode of the chip and an input / output electrode of the element are electrically connected via the metal bump. 前記基板の表面に前記素子を積層するとともに前記基板の裏面に前記ＩＣチップを積層し、前記ＩＣチップの入出力電極と前記基板の金属配線パターンとを電極バンプを介して電気的に接続し、前記基板の金属配線パターンに設けた貫通孔を介して前記ＩＣチップの入出力電極と前記素子の入出力電極とを前記ワイヤボンディングにより電気的に接続した請求項１記載の慣性力センサ。 Laminating the element on the surface of the substrate and laminating the IC chip on the back surface of the substrate, electrically connecting the input / output electrodes of the IC chip and the metal wiring pattern of the substrate via electrode bumps, 2. The inertial force sensor according to claim 1, wherein an input / output electrode of the IC chip and an input / output electrode of the element are electrically connected by wire bonding through a through hole provided in a metal wiring pattern of the substrate. 前記ＩＣチップと前記素子と前記基板とは、互いに重畳するように、液状樹脂を介在させて硬化させた請求項１記載の慣性力センサ。 The inertial force sensor according to claim 1, wherein the IC chip, the element, and the substrate are cured by interposing a liquid resin so as to overlap each other.
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