JPH0590448A - Hybrid integrated circuit - Google Patents

Hybrid integrated circuit

Info

Publication number
JPH0590448A
JPH0590448A JP3249703A JP24970391A JPH0590448A JP H0590448 A JPH0590448 A JP H0590448A JP 3249703 A JP3249703 A JP 3249703A JP 24970391 A JP24970391 A JP 24970391A JP H0590448 A JPH0590448 A JP H0590448A
Authority
JP
Japan
Prior art keywords
hybrid integrated
integrated circuit
chip
circuit element
wire
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.)
Pending
Application number
JP3249703A
Other languages
Japanese (ja)
Inventor
Noriaki Sakamoto
則明 坂本
Yuusuke Igarashi
優助 五十嵐
Susumu Ota
晋 太田
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP3249703A priority Critical patent/JPH0590448A/en
Publication of JPH0590448A publication Critical patent/JPH0590448A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805Shape
    • H01L2224/4809Loop shape
    • H01L2224/48091Arched
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/19Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
    • H01L2924/191Disposition
    • H01L2924/19101Disposition of discrete passive components
    • H01L2924/19105Disposition of discrete passive components in a side-by-side arrangement on a common die mounting substrate
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/14Structural association of two or more printed circuits
    • H05K1/144Stacked arrangements of planar printed circuit boards

Landscapes

  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)

Abstract

PURPOSE:To prevent disconnection of a wire which connects a circuit element and a conductive path due to flow of silicon gel which is generated at the time of heat cycle of a hybrid integrated circuit where silicon gel is filled and humidity resistance treatment is performed. CONSTITUTION:A desired circuit element 5 which is mounted on two substrates 1 and 2 is sealed by a sealing member 8, is separated from a silicon gel 9 which is filled into a hybrid integrated circuit, and then the circuit element 5 is coated with a silicon resin film while leaving a hollow layer 15 within the sealed member 8.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は混成集積回路に関し、特
に外部環境化で使用される混成集積回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid integrated circuit, and more particularly to a hybrid integrated circuit used in an external environment.

【0002】[0002]

【従来の技術】図3は、外部環境化で使用される代表的
な混成集積回路の断面図である。二枚の混成集積回路基
板(30)(31)上にはチップ状のLS1,VLS
I,パワートランジスタ及びチップ抵抗等の回路素子
(32)が所望の導電路(図示しない)上に固着搭載さ
れている。それら二枚の基板(30)(31)は枠状の
ケース材(33)により所定の間隔離間するように配置
して固着一体化される。
2. Description of the Related Art FIG. 3 is a sectional view of a typical hybrid integrated circuit used in an external environment. Chip-shaped LS1 and VLS are mounted on the two hybrid integrated circuit boards (30) and (31).
Circuit elements (32) such as I, power transistors and chip resistors are fixedly mounted on a desired conductive path (not shown). The two substrates (30) and (31) are fixedly integrated with each other by a frame-shaped case member (33) so as to be separated from each other by a predetermined distance.

【0003】一方、LSI及びVLSIチップ等の回路
素子(32)と導電路とを接続するワイヤ線は細いため
にエポキシ樹脂(34)によって密封封止される。とこ
ろで、外部環境化で使用される混成集積回路では耐湿性
を向上させるために両基板(30)(31)間とケース
材(33)とで形成される空間内にシリコーンゲル(3
5)を充填して、基板(30)(31)上の回路パター
ン及び回路素子を水湿から保護している。
On the other hand, since the wire wire connecting the circuit element (32) such as LSI and VLSI chip and the conductive path is thin, it is hermetically sealed by the epoxy resin (34). By the way, in a hybrid integrated circuit used in an external environment, in order to improve moisture resistance, a silicone gel (3) is formed in a space formed between both substrates (30) and (31) and a case material (33).
5) is filled to protect the circuit patterns and circuit elements on the substrates (30) and (31) from water and moisture.

【0004】シリコーンゲル(35)を両基板(30)
(31)間に充填すると、ヒートサイクル時にシリコー
ンゲル(35)が流動して、内圧が高くなりLSI及び
VLSI等を接続する細線ワイヤ線が断線する恐れがあ
るが、前述したようにエポキシ樹脂(34)で密封封止
することにより解決される。また、かかるエポキシ樹脂
の熱膨張係数は基板の熱膨張係数と略同一となるように
調整されているために、基板とエポキシ樹脂との密着性
が良く、水分が浸入しにくくなり、耐湿信頼性が向上す
る。本出願人は、エポキシ樹脂と基板の両者の熱膨張係
数を合せることに関して既に出願済である(特願平3−
118812号参照)。
Silicone gel (35) on both substrates (30)
If filled between (31), the silicone gel (35) will flow during the heat cycle and the internal pressure will increase, which may break the fine wire wire connecting LSI, VLSI and the like. It is solved by hermetically sealing with 34). Further, since the coefficient of thermal expansion of the epoxy resin is adjusted to be approximately the same as the coefficient of thermal expansion of the substrate, the adhesion between the substrate and the epoxy resin is good, moisture does not easily enter, and the humidity resistance is high. Is improved. The applicant has already applied for matching the thermal expansion coefficients of both the epoxy resin and the substrate (Japanese Patent Application No.
No. 118812).

【0005】[0005]

【発明が解決しようとする課題】前述したように従来の
混成集積回路ではヒートサイクル時に発生するシリコー
ンゲルの流動によるワイヤ線の断線防止をすることがで
きる。しかし、エポキシ樹脂の封止剤と基板の熱膨張係
数をマッチングさせることで、両者の密着性が向上する
反面、エポキシ樹脂とベアチップとの熱膨張係数の差が
著しく異なるために、温度変化(温度サイクル)によ
り、封止剤とベアチップとの接着部に繰返し応力が加わ
り、ベアチップ表面でのワイヤボンディング部のネック
切れあるいは電極から剥離するという不良が発生する問
題がある。
As described above, in the conventional hybrid integrated circuit, it is possible to prevent the wire wire from breaking due to the flow of the silicone gel generated during the heat cycle. However, by matching the coefficient of thermal expansion of the epoxy resin with the coefficient of thermal expansion of the substrate, the adhesiveness between the two is improved, but the difference in coefficient of thermal expansion between the epoxy resin and the bare chip is significantly different, so the temperature change (temperature Cycle), stress is repeatedly applied to the bonding portion between the sealant and the bare chip, causing a problem that the wire bonding portion on the bare chip surface is broken or peeled from the electrode.

【0006】かかる、不良は本発明者の実験によると、
ベアチップのコーナ部に集中し、また、ワイヤ断線不良
となった周辺でチップ表面と封止剤の界面が剥離すると
いうことが判明した。これは、冷熱サイクルを繰返すこ
とで、最大応力がコーナ部に加わる。従ってそのコーナ
部で剥離が生じ、接着力でおさえられていたせん断方向
の否がワイヤボンディング部に加わり、断線するものと
考えられている。
According to an experiment conducted by the present inventor, such defects are
It was found that the interface between the chip surface and the encapsulant was peeled off around the corner of the bare chip and where the wire disconnection failure occurred. This is because the maximum stress is applied to the corner portion by repeating the cooling / heating cycle. Therefore, it is considered that peeling occurs at the corner portion, and the presence or absence of the shearing direction, which is suppressed by the adhesive force, is applied to the wire bonding portion, resulting in disconnection.

【0007】これを図4のA及びBに基づいて説明す
る。図4のAは、熱衝撃によってエポキシ樹脂とチップ
との熱膨張係数の差によるせん断方向への応力が加わっ
ているが、エポキシ樹脂がチップと接着しているため
に、せん断方向の動きを抑制している。それに対して、
図4のBは、熱衝撃を繰返すことによって、最大応力が
加わるチップコーナ部でエポキシ樹脂が剥離し(斜線領
域)、せん断方向の否がワイヤのボンディング部に加わ
り、最終的に断線に至るものである。
This will be described with reference to FIGS. 4A and 4B. In A of FIG. 4, stress in the shearing direction is applied due to the difference in thermal expansion coefficient between the epoxy resin and the chip due to thermal shock, but the epoxy resin is bonded to the chip, so movement in the shearing direction is suppressed. is doing. On the other hand,
FIG. 4B shows that the epoxy resin is peeled off at the corner of the chip where the maximum stress is applied by repeating thermal shock (hatched area), and the presence or absence of the shearing direction is applied to the bonding portion of the wire, which eventually leads to disconnection. Is.

【0008】また、図5は、チップサイズの大きさを異
ならしめてワイヤ断線不良実験を行った結果である。実
験条件として、アルミニウム基板上に形成された銅箔上
にベアチップをAgペーストを介して固着搭載し、ベア
チップと銅箔とをAlワイヤ線でボンディングし、ベア
チップとワイヤ線をエポキシ樹脂で封止したものを−5
5℃/5min〜150℃/5min(液相)の熱衝撃
試験を行った。図5において、(A)はチップサイズが
5.47×8.05、(B)はチップサイズが5.16
×6.2であり、夫々10個のチップが用いられた。
Further, FIG. 5 shows the result of a wire disconnection failure experiment conducted with different chip sizes. As experimental conditions, a bare chip was fixedly mounted on a copper foil formed on an aluminum substrate via an Ag paste, the bare chip and the copper foil were bonded with an Al wire wire, and the bare chip and the wire wire were sealed with an epoxy resin. -5
A thermal shock test was performed at 5 ° C / 5 min to 150 ° C / 5 min (liquid phase). In FIG. 5, (A) has a chip size of 5.47 × 8.05, and (B) has a chip size of 5.16.
× 6.2, and 10 chips were used for each.

【0009】図5からわかるように、チップサイズが小
さい(B)は2000サイクル時で不良が発生し、チッ
プサイズが大きい(A)は500サイクル時で不良が発
生している。チップサイズがある程度小さいものはワイ
ヤ曲線不良の発生率は2000サイクル時でも低いため
外部環境化で使用され、且つ環境条件が厳しい車載用あ
るいはインバータエアコンの室外機用の混成集積回路と
しても用いることは可能である。
As can be seen from FIG. 5, a small chip size (B) has a defect at 2000 cycles, and a large chip size (A) has a defect at 500 cycles. Since the occurrence rate of wire curve defects is low even in 2000 cycles even if the chip size is small to some extent, it is used in an external environment, and it cannot be used as a hybrid integrated circuit for in-vehicle or outdoor units of inverter air conditioners with severe environmental conditions. It is possible.

【0010】しかし、チップサイズが比較的大きいもの
は500サイクルで不良が発生し、前述したように外部
環境化で使用される混成集積回路としては信頼性が著し
く低いために実用できないということが確認された。
However, if the chip size is relatively large, a defect occurs after 500 cycles, and as described above, it is confirmed that the hybrid integrated circuit used in the external environment cannot be practically used because of its extremely low reliability. Was done.

【0011】[0011]

【課題を解決するための手段】本発明は、上述した課題
を鑑みて為されたものであり、複数の回路素子が搭載さ
れた第1および第2の混成集積回路基板と、前記両基板
上に搭載された回路素子を相対向するように配置するケ
ース材と、前記両基板と前記ケース材とで形成された空
間内に充填されたシリコーン樹脂層とを具備し、前記両
基板の少なくとも一方の基板上に搭載された所望のチッ
プ状の回路素子のみを密封部材により密封し、前記密封
部材内に配置されたチップ状の回路素子をシリコーン樹
脂で被覆し、前記密封部材内の上層に空間層を形成した
ことを特徴とする。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and includes first and second hybrid integrated circuit boards on which a plurality of circuit elements are mounted, and on both the boards. A case material in which circuit elements mounted on the substrate are disposed so as to face each other, and a silicone resin layer filled in a space formed by the both substrates and the case material, and at least one of the both substrates. Only a desired chip-shaped circuit element mounted on the substrate of (1) is sealed with a sealing member, and the chip-shaped circuit element arranged in the sealing member is covered with a silicone resin, and a space is provided in an upper layer in the sealing member. It is characterized in that a layer is formed.

【0012】また、このような混成集積回路であって、
前記チップ状の回路素子上には熱膨張係数の低い絶縁樹
脂膜が形成されることを特徴とする。また、このような
混成集積回路であって、前記両基板はアルミニウム基板
を用いたことを特徴とする。
Further, in such a hybrid integrated circuit,
An insulating resin film having a low coefficient of thermal expansion is formed on the chip-shaped circuit element. Further, in such a hybrid integrated circuit, the both substrates are aluminum substrates.

【0013】[0013]

【作用】この様に本発明の混成集積回路では、チップ状
の回路素子上に熱膨張係数の低い絶縁樹脂膜が形成され
ているため、絶縁樹脂膜とチップ状素子との熱膨張係数
の差が著しく緩和されるとともにワイヤ線の固着強度を
補強することができる。その結果、絶縁樹脂膜とチップ
状素子との界面での温度変化(温度サイクル)による剥
離が抑制される。またチップ素子上の電極と接続される
ワイヤ線のネック部は絶縁樹脂膜によって補強される構
造となるため、温度サイクルによるせん断力がワイヤ線
のネック部に生じたとしても断線する恐れはない。
As described above, in the hybrid integrated circuit of the present invention, since the insulating resin film having a low thermal expansion coefficient is formed on the chip-shaped circuit element, the difference in the thermal expansion coefficient between the insulating resin film and the chip-shaped element is large. Is remarkably alleviated and the fixing strength of the wire can be reinforced. As a result, peeling due to temperature change (temperature cycle) at the interface between the insulating resin film and the chip-shaped element is suppressed. Further, since the neck portion of the wire wire connected to the electrode on the chip element is reinforced by the insulating resin film, even if shearing force due to the temperature cycle is generated in the neck portion of the wire wire, there is no fear of disconnection.

【0014】また、本発明ではチップ状の回路素子が密
封部材によって密封される構造となるために、ヒートサ
イクル時に発生するシリコーンゲルの流動による内圧が
高くなってもチップ状の回路素子と導電路を接続するワ
イヤ線の断線を防止できる。また、本発明では、密封部
材内に配置されたチップ状の回路素子はシリコーン樹脂
膜で被覆されるため耐防水性が低下することはない。
Further, in the present invention, since the chip-shaped circuit element is sealed by the sealing member, even if the internal pressure due to the flow of the silicone gel generated during the heat cycle is increased, the chip-shaped circuit element and the conductive path are formed. It is possible to prevent disconnection of the wire wire connecting the. Further, in the present invention, since the chip-shaped circuit element arranged in the sealing member is covered with the silicone resin film, the waterproof resistance does not deteriorate.

【0015】さらに、本発明では、密封部材内には空間
層が形成されているために、ヒートサイクル時にチップ
状の回路素子を被覆するシリコーン樹脂膜が流動したと
しても、上述したように密封部材内に空間部が形成され
ているためにシリコーンゲルの内圧が高くなる恐れがな
く、ワイヤ線の断線がない。
Further, according to the present invention, since the space layer is formed in the sealing member, even if the silicone resin film covering the chip-shaped circuit element flows during the heat cycle, the sealing member is as described above. Since the space is formed inside, there is no risk of the internal pressure of the silicone gel increasing, and there is no wire breakage.

【0016】[0016]

【実施例】以下に、図1及び図2に示した実施例に基づ
いて、本発明の混成集積回路を説明する。図1は本発明
の混成集積回路の断面図であり、(1)(2)は混成集
積回路基板、(3)(4)は導電路、(5)はチップ状
の回路素子、(7)はケース材、(8)は密封部材、
(9)はシリコーン樹脂層、(10)は絶縁樹脂膜、
(11)はシリコーン樹脂膜である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A hybrid integrated circuit of the present invention will be described below based on the embodiments shown in FIGS. FIG. 1 is a cross-sectional view of a hybrid integrated circuit of the present invention. (1) and (2) are hybrid integrated circuit boards, (3) and (4) are conductive paths, (5) is a chip-shaped circuit element, and (7). Is a case material, (8) is a sealing member,
(9) is a silicone resin layer, (10) is an insulating resin film,
(11) is a silicone resin film.

【0017】混成集積回路基板(1)(2)は、例えば
アルミニウム基板等の金属基板が用いられる。かかるア
ルミニウム基板表面には周知の陽極酸化技術により酸化
アルミニウム膜が形成されている。この両基板(1)
(2)の一主面にはエポキシ樹脂等の絶縁樹脂層(図示
しない)を介して所望形状の導電路(3)(4)が形成
される。かかる、導電路(3)(4)は銅箔により形成
され、例えば前述した絶縁樹脂層と銅箔とがクラッド状
に一体化された材料を夫々の基板(1)(2)上に貼着
し、所定のエッチング技術によってパターン化される。
As the hybrid integrated circuit boards (1) and (2), metal substrates such as aluminum substrates are used. An aluminum oxide film is formed on the surface of such an aluminum substrate by a known anodic oxidation technique. Both boards (1)
Conductive paths (3) and (4) having a desired shape are formed on one main surface of (2) through an insulating resin layer (not shown) such as an epoxy resin. The conductive paths (3) and (4) are formed of copper foil, and the above-mentioned material in which the insulating resin layer and the copper foil are integrated in a clad shape is attached to the respective substrates (1) and (2). Then, it is patterned by a predetermined etching technique.

【0018】図1からでは明らかにされてないが、導電
路(3)(4)は基板(1)(2)の略全面の領域に形
成されており、所定の位置に回路素子を固着するパッド
が形成され、かかるパッドの周辺近傍には複数の導電路
(3)(4)が延在形成されている。各パッド上には複
数の回路素子(5)が固着搭載される。例えば、トラン
ジスタ、チップ抵抗等の回路素子及びLSI,VLSI
等のチップ状の回路素子(5)がAgペースト等の接着
剤を介してパッド上に固着される。一方、LSI,VL
SI等の回路素子(5)上の電極と導電路(3)(4)
との接続は約20〜40μ径の細線のAlワイヤ線(6
A)により又、パワートランジスタ等のパワー系の回路
素子は約200〜300μ径のAlワイヤ線(6B)に
より、超音波ボンディング等の接続手段を用いて電気的
に接続される。
Although not clearly shown in FIG. 1, the conductive paths (3) and (4) are formed on the substantially entire surface area of the substrates (1) and (2), and the circuit elements are fixed at predetermined positions. A pad is formed, and a plurality of conductive paths (3) and (4) are formed to extend near the periphery of the pad. A plurality of circuit elements (5) are fixedly mounted on each pad. For example, circuit elements such as transistors and chip resistors, and LSI and VLSI
A chip-shaped circuit element (5) such as the above is fixed onto the pad via an adhesive such as Ag paste. On the other hand, LSI, VL
Electrodes on circuit elements (5) such as SI and conductive paths (3) (4)
The connection with the Al wire wire (6
According to A), the power system circuit element such as a power transistor is electrically connected by an Al wire wire (6B) having a diameter of about 200 to 300 μm by using a connecting means such as ultrasonic bonding.

【0019】両基板(1)(2)上に搭載されたLSI
チップ、トランジスタチップおよびチップ抵抗等の回路
素子(5)はエポキシ樹脂(12)によって被覆され
る。また、両基板(1)(2)の周端部には外部回路と
接続を行うために外部リード端子(13)(14)が固
着されている。ところで、いずれか一方の基板上に搭載
された比較的大きいチップサイズのVLSI等のメモリ
ーチップは、前述したエポキシ樹脂(12)によって被
覆されず、上面に絶縁樹脂薄膜(10)(以下樹脂薄膜
という)が形成される。かかる、樹脂薄膜(10)の熱
膨張係数は低く調整されている。即ち、樹脂薄膜(1
0)の熱膨張係数は、回路素子(5)の熱膨張係数と略
同一かあるいは近似した値にまで低く設定されている。
回路素子(5)の熱膨張係数は約3〜4×10-6/℃と
比較的低いために、本実施例で用いられる樹脂薄膜(1
0)の熱膨張係数はシリカ等のフィラーを高密度充填し
約10×10-6/℃に調整されている。
LSI mounted on both substrates (1) and (2)
Circuit elements (5) such as chips, transistor chips and chip resistors are covered with epoxy resin (12). Further, external lead terminals (13) and (14) are fixed to the peripheral end portions of both substrates (1) and (2) for connection with an external circuit. By the way, a memory chip such as a VLSI having a relatively large chip size mounted on one of the substrates is not covered with the above-mentioned epoxy resin (12), and has an insulating resin thin film (10) (hereinafter referred to as a resin thin film) on the upper surface. ) Is formed. The coefficient of thermal expansion of the resin thin film (10) is adjusted to be low. That is, the resin thin film (1
The coefficient of thermal expansion of 0) is set to a value which is substantially the same as or close to the coefficient of thermal expansion of the circuit element (5).
Since the thermal expansion coefficient of the circuit element (5) is relatively low at about 3 to 4 × 10 −6 / ° C., the resin thin film (1
The thermal expansion coefficient of 0) is adjusted to about 10 × 10 −6 / ° C. by densely filling a filler such as silica.

【0020】本発明に用いられる樹脂薄膜(10)につ
いて、更に述べると、樹脂薄膜(10)は前述したよう
に、回路素子(5)上に薄く形成する必要があるために
溶剤性のフェノール硬化系エポキシ樹脂が用いられる。
溶剤性のフェノール硬化系樹脂は液状であるためにフィ
ラーが高密度充填されているにもかかわらず約100μ
〜500μ程度の膜厚の樹脂薄膜(10)を回路素子上
に容易に形成することができる。回路素子(5)上に樹
脂薄膜(10)を形成する場合、前述したように樹脂が
溶剤性であるために、回路素子(5)の大きさに対応し
た適量の樹脂をボッティングし、加熱処理するだけで形
成できる。即ち、回路素子(5)上の略全面には前述し
た樹脂薄膜(10)が形成されるために、ワイヤ線のネ
ック部は樹脂薄膜(10)によって補強されることにな
る。
The resin thin film (10) used in the present invention will be further described. As described above, since the resin thin film (10) needs to be thinly formed on the circuit element (5), solvent-based phenol curing is performed. A system epoxy resin is used.
Solvent-based phenol-curing resin is liquid, so it is approximately 100μ even though the filler is densely packed.
The resin thin film (10) having a thickness of about 500 μm can be easily formed on the circuit element. When the resin thin film (10) is formed on the circuit element (5), since the resin is solvent-based as described above, an appropriate amount of resin corresponding to the size of the circuit element (5) is bottled and heated. It can be formed only by processing. That is, since the above-mentioned resin thin film (10) is formed on substantially the entire surface of the circuit element (5), the neck portion of the wire line is reinforced by the resin thin film (10).

【0021】本実施例では、樹脂薄膜(10)の樹脂材
料として、溶剤性のフェノール硬化性樹脂を用いたが、
その他の材料として酸無水物硬化系エポキシ樹脂あるい
はアミン硬化系エポキシ樹脂を用いることができる。し
かし、それらの中でフェノール系硬化樹脂が一番耐湿性
が優れているため本実施例ではフェノール硬化系を用い
た。
In this embodiment, a solvent-based phenol curable resin is used as the resin material of the resin thin film (10).
As the other material, an acid anhydride curing epoxy resin or an amine curing epoxy resin can be used. However, among these, the phenol-based curable resin has the highest moisture resistance, and therefore the phenol-cured system is used in this embodiment.

【0022】ところで、前述した樹脂は回路素子(5)
表面に直接コーティングされるために耐湿信頼性を確保
する必要があるために高純度化された樹脂が用いられて
いる。本実施例で用いられた樹脂は硬化物中の不純物イ
オン濃度が非常に低く(Cl -10ppm,Na+2〜3
ppm)、LSI用のトランスファーモールド樹脂と同
レベルまで高純度化されている。従って、回路素子
(5)との密着性が良く、水分が浸入しにくいため、高
い耐湿信頼性が得られる。また、α線によるソフトエラ
ーを発生しやすいDRAM等のチップ状回路素子を実装
する場合であっても問題はない。
By the way, the above-mentioned resin is the circuit element (5).
Ensures moisture resistance reliability as it is coated directly on the surface
Highly purified resin is used for
There is. The resin used in this example is an impurity in the cured product.
Very low on concentration (Cl -10 ppm, Na+2-3
ppm), same as transfer mold resin for LSI
It is highly purified to the level. Therefore, the circuit element
(5) Adhesion is good and it is difficult for water to enter, so
High moisture resistance reliability is obtained. In addition, soft error due to α rays
Chip-like circuit elements such as DRAM that easily generate
There is no problem even if you do.

【0023】このように、回路素子(5)上に低い熱膨
張率を有する樹脂薄膜(10)を形成することにより、
回路素子(5)と樹脂薄膜(10)との熱膨張係数がマ
ッチングされるため、冷熱サイクル時においても素子
(5)と樹脂薄膜(10)との界面が剥離しない。従っ
て、厳しい冷熱サイクル条件下でせん断力が回路素子
(5)のコーナ部に加わったとしても、前述したように
回路素子(5)と樹脂薄膜(10)の界面が剥離せず、
又ワイヤ線(6A)のネック部が樹脂薄膜(10)によ
って補強されているために、ワイヤ線(6A)の固着強
度が増加し、従来のようなヒートサイクル時におけるワ
イヤ線断線不良を著しく抑制することができる。
By thus forming the resin thin film (10) having a low coefficient of thermal expansion on the circuit element (5),
Since the thermal expansion coefficients of the circuit element (5) and the resin thin film (10) are matched, the interface between the element (5) and the resin thin film (10) does not peel off even during the thermal cycle. Therefore, even if a shearing force is applied to the corner portion of the circuit element (5) under a severe thermal cycle condition, the interface between the circuit element (5) and the resin thin film (10) does not peel off as described above,
Further, since the neck portion of the wire wire (6A) is reinforced by the resin thin film (10), the fixing strength of the wire wire (6A) is increased, and the wire wire disconnection defect during the heat cycle as in the conventional case is significantly suppressed. can do.

【0024】一方、樹脂薄膜(10)が形成された比較
的大型の回路素子(5)は密封部材(8)により、完全
に密封される。かかる、密封部材(8)は、例えばエポ
キシ樹脂等の絶縁樹脂により箱状に形成され、その上面
に穴(8A)が形成されている。密封部材(8)と基板
との接着は、例えば接着剤、接着テープ等の周知の接着
手段を用いて接着すれば足りる。
On the other hand, the relatively large circuit element (5) on which the resin thin film (10) is formed is completely sealed by the sealing member (8). The sealing member (8) is formed of an insulating resin such as an epoxy resin in a box shape, and a hole (8A) is formed in the upper surface thereof. The sealing member (8) and the substrate may be bonded by using a known bonding means such as an adhesive or an adhesive tape.

【0025】大型の回路素子(5)を密封部材(8)で
密封した後、前述した穴(8A)からシリコーン樹脂を
所定量だけ流し込み、シリコーン樹脂膜(11)が形成
される。かかる、シリコーン樹脂膜(11)は回路素子
(5)及びワイヤ線(6A)を被覆するとともに密封部
材(8)内の周辺の導電路(4)も被覆する。即ち、密
封部材(8)内はシリコーン樹脂膜(11)と中空層
(15)が形成されることになる。シリコーン樹脂膜
(11)を形成した後、穴(8A)はテープ等の封止手
段を用いて封止される。
After sealing the large-sized circuit element (5) with the sealing member (8), a predetermined amount of silicone resin is poured through the hole (8A) to form the silicone resin film (11). The silicone resin film (11) covers the circuit element (5) and the wire line (6A) and also covers the peripheral conductive path (4) in the sealing member (8). That is, the silicone resin film (11) and the hollow layer (15) are formed in the sealing member (8). After forming the silicone resin film (11), the hole (8A) is sealed using a sealing means such as a tape.

【0026】所定の回路素子(5)が搭載された両基板
(1)(2)は枠状のケース材(7)により、所定間隔
だけ離間され固着一体化される。両基板(1)(2)と
ケース材(7)で形成された空間領域内にはシリコーン
樹脂がケース材(7)の孔(7A)より充填されシリコ
ーン樹脂層(9)が形成される。かかる、シリコーン樹
脂層(9)により混成集積回路の耐防水性が図られる。
Both boards (1) and (2) on which a predetermined circuit element (5) is mounted are separated by a predetermined distance by a frame-shaped case material (7) and fixedly integrated. A silicone resin is filled in the space area formed by both the substrates (1) and (2) and the case material (7) through the hole (7A) of the case material (7) to form a silicone resin layer (9). The silicone resin layer (9) makes the hybrid integrated circuit waterproof.

【0027】ところで、図5はシリコーンゲルを全充填
したもの(A)と半充填(中空層を形成したもの)した
もの(B)のヒートサイクルによるワイヤ線の断線不良
率を測定した結果である。ヒートサイクル条件として、
−40℃/30分〜125℃/30分(気相)で行い、
また共にアルミニウム基板上に5.16×6.2サイズ
のベアチップを搭載し40μ径のAl線でワイヤーボン
ディングされている。
By the way, FIG. 5 shows the results of measuring the defect rate of wire breakage due to the heat cycle of the silicone gel full-filled (A) and the half-filled (hollow layer formed) (B). .. As heat cycle conditions,
-40 ℃ / 30 minutes ~ 125 ℃ / 30 minutes (gas phase),
Both are mounted with a bare chip of 5.16 × 6.2 size on an aluminum substrate and wire-bonded with an Al wire having a diameter of 40 μm.

【0028】図5から、明らかな様に、(A)の全充填
のものは約300サイクル時点で不良が発生しているの
に対し、(B)の半充填のものでは約1500サイクル
時点でも不良が発生していない。即ち、中空層を設ける
ことにより、ヒートサイクル時にシリコーンゲルが流動
したとしても中空層により、流動性が緩和され内圧が高
くならないからである。
As is apparent from FIG. 5, in the case of full filling of (A), defects occur at about 300 cycles, whereas in the case of semi-filling of (B) even at about 1500 cycles. No defects have occurred. That is, by providing the hollow layer, even if the silicone gel flows during the heat cycle, the hollow layer reduces the fluidity and the internal pressure does not increase.

【0029】従って、本発明に依れば、ヒートサイクル
時にシリコーン樹脂層(9)が流動したとしても、LS
I,トランジスタ等の比較的小型化の回路素子(5)は
エポキシ樹脂(12)によって被覆されているためにワ
イヤ線が断線することはない。また、VLSI等の比較
的大型の回路素子(5)は密封部材(8)により密封さ
れているためにシリコーン樹脂層(9)の流動による影
響は全くなく、密封部材(8)内に形成されたシリコー
ン樹脂膜(11)もヒートサイクル時に流動するもの
の、前述したように密封部材(8)内には中空層が形成
されているためワイヤ線が断線することはない。
Therefore, according to the present invention, even if the silicone resin layer (9) flows during the heat cycle, the LS
Since the relatively small circuit element (5) such as I or transistor is covered with the epoxy resin (12), the wire line is not broken. Further, since the relatively large-sized circuit element (5) such as VLSI is sealed by the sealing member (8), it is not affected by the flow of the silicone resin layer (9) and is formed in the sealing member (8). Although the silicone resin film (11) also flows during the heat cycle, since the hollow layer is formed in the sealing member (8) as described above, the wire wire is not broken.

【0030】[0030]

【発明の効果】以上に詳述した如く、本発明に依れば、
耐湿性が要求される混成集積回路上に比較的大型のチッ
プ状の回路素子を実装したとしても、冷熱サイクル時に
回路素子と導体とを接続するワイヤ線を断線させること
なく耐湿性を向上させることができる。その結果、本発
明を用いることで、極めて高信頼性の混成集積回路を提
供することができる。
As described above in detail, according to the present invention,
Even if a relatively large chip-shaped circuit element is mounted on a hybrid integrated circuit that requires moisture resistance, it is necessary to improve the moisture resistance without breaking the wire line that connects the circuit element and the conductor during a thermal cycle. You can As a result, by using the present invention, a highly reliable hybrid integrated circuit can be provided.

【0031】また、前述したように、大型のチップ状の
回路素子をダイボンドできるために厳しい環境化で使用
できる混成集積回路の高密度実装化を実況できる。その
結果、高密度且つ極めて小型化された耐湿性の優れた混
成集積回路を提供することができる。
Further, as described above, since a large chip-shaped circuit element can be die-bonded, high-density packaging of a hybrid integrated circuit which can be used in a harsh environment can be put into practice. As a result, it is possible to provide a hybrid integrated circuit which has high density and is extremely miniaturized and has excellent moisture resistance.

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

【図1】図1は本発明を説明する混成集積回路の断面図
である。
FIG. 1 is a cross-sectional view of a hybrid integrated circuit illustrating the present invention.

【図2】図2はワイヤ線の断線不良率を示す特性図であ
る。
FIG. 2 is a characteristic diagram showing a disconnection defect rate of a wire wire.

【図3】図3は従来の混成集積回路を示す断面図であ
る。
FIG. 3 is a cross-sectional view showing a conventional hybrid integrated circuit.

【図4】図4は熱衝撃がワイヤ線のネック部に加わると
きの説明図である。
FIG. 4 is an explanatory diagram when a thermal shock is applied to a neck portion of a wire wire.

【図5】図5はワイヤ線の断線不良率を示す特性図であ
る。
FIG. 5 is a characteristic diagram showing a disconnection defect rate of a wire wire.

【符号の説明】[Explanation of symbols]

(1)(2) 混成集積回路基板 (3)(4) 導電路 (5) 回路素子 (7) ケース材 (8) 密封部材 (9) シリコーン樹脂層 (10) 絶縁樹脂膜 (11) シリコーン樹脂膜 (1) (2) Hybrid integrated circuit board (3) (4) Conductive path (5) Circuit element (7) Case material (8) Sealing member (9) Silicone resin layer (10) Insulating resin film (11) Silicone resin film

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 複数の回路素子が搭載された第1および
第2の混成集積回路基板と、前記両基板上に搭載された
回路素子を相対向するように配置するケース材と、前記
両基板と前記ケース材とで形成された空間内に充填され
たシリコーン樹脂層とを具備し、前記両基板の少なくと
も一方の基板上に搭載された所望のチップ状の回路素子
のみを密封部材により密封し、前記密封部材内に配置さ
れたチップ状の回路素子をシリコーン樹脂で被覆し、前
記密封部材内の上層に中空層を形成したことを特徴とす
る混成集積回路。
1. A first and a second hybrid integrated circuit board on which a plurality of circuit elements are mounted, a case member on which the circuit elements mounted on the both boards are arranged so as to face each other, and the both boards. And a silicone resin layer filled in a space formed by the case material, and sealing only a desired chip-shaped circuit element mounted on at least one of the two substrates with a sealing member. A hybrid integrated circuit characterized in that a chip-shaped circuit element arranged in the sealing member is covered with a silicone resin, and a hollow layer is formed as an upper layer in the sealing member.
【請求項2】 前記チップ状の回路素子上面には熱膨張
係数の低い絶縁樹脂膜が形成されていることを特徴とす
る請求項1記載の混成集積回路。
2. The hybrid integrated circuit according to claim 1, wherein an insulating resin film having a low coefficient of thermal expansion is formed on an upper surface of the chip-shaped circuit element.
【請求項3】 前記両基板はアルミニウム基板を用いた
ことを特徴とする請求項1記載の混成集積回路。
3. The hybrid integrated circuit according to claim 1, wherein both substrates are aluminum substrates.
JP3249703A 1991-09-27 1991-09-27 Hybrid integrated circuit Pending JPH0590448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3249703A JPH0590448A (en) 1991-09-27 1991-09-27 Hybrid integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3249703A JPH0590448A (en) 1991-09-27 1991-09-27 Hybrid integrated circuit

Publications (1)

Publication Number Publication Date
JPH0590448A true JPH0590448A (en) 1993-04-09

Family

ID=17196950

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3249703A Pending JPH0590448A (en) 1991-09-27 1991-09-27 Hybrid integrated circuit

Country Status (1)

Country Link
JP (1) JPH0590448A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1978792A1 (en) * 2006-01-26 2008-10-08 Matsushita Electric Industrial Co., Ltd. Substrate structure and electronic device
JP2015130492A (en) * 2013-12-05 2015-07-16 ローム株式会社 semiconductor module
JP2018088475A (en) * 2016-11-29 2018-06-07 Tdk株式会社 Electronic apparatus, power supply device, and manufacturing method of electronic apparatus
CN109688696A (en) * 2019-01-04 2019-04-26 维沃移动通信有限公司 Circuit board arrangement, the manufacture craft of circuit board arrangement and electronic equipment
JP2020145307A (en) * 2019-03-06 2020-09-10 三菱電機株式会社 Semiconductor device and manufacturing method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1978792A1 (en) * 2006-01-26 2008-10-08 Matsushita Electric Industrial Co., Ltd. Substrate structure and electronic device
EP1978792A4 (en) * 2006-01-26 2009-08-12 Panasonic Corp Substrate structure and electronic device
US8106307B2 (en) 2006-01-26 2012-01-31 Panasonic Corporation Substrate structure and electronic apparatus
JP2015130492A (en) * 2013-12-05 2015-07-16 ローム株式会社 semiconductor module
JP2018088475A (en) * 2016-11-29 2018-06-07 Tdk株式会社 Electronic apparatus, power supply device, and manufacturing method of electronic apparatus
CN109688696A (en) * 2019-01-04 2019-04-26 维沃移动通信有限公司 Circuit board arrangement, the manufacture craft of circuit board arrangement and electronic equipment
JP2020145307A (en) * 2019-03-06 2020-09-10 三菱電機株式会社 Semiconductor device and manufacturing method thereof
CN111668197A (en) * 2019-03-06 2020-09-15 三菱电机株式会社 Semiconductor device and method for manufacturing the same
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