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JP2003309264A - Semiconductor device - Google Patents

Semiconductor device

Info

Publication number
JP2003309264A
JP2003309264A JP2003093135A JP2003093135A JP2003309264A JP 2003309264 A JP2003309264 A JP 2003309264A JP 2003093135 A JP2003093135 A JP 2003093135A JP 2003093135 A JP2003093135 A JP 2003093135A JP 2003309264 A JP2003309264 A JP 2003309264A
Authority
JP
Japan
Prior art keywords
mosfet
circuit
semiconductor chip
power mosfet
terminal
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
JP2003093135A
Other languages
Japanese (ja)
Other versions
JP4007450B2 (en
Inventor
Mitsuzo Sakamoto
光造 坂本
Isao Yoshida
功 吉田
Masatoshi Morikawa
正敏 森川
Shigeo Otaka
成雄 大高
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Priority to JP5031579A priority Critical patent/JP3018816B2/en
Priority to JP17505599A priority patent/JP3446665B2/en
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2003093135A priority patent/JP4007450B2/en
Publication of JP2003309264A publication Critical patent/JP2003309264A/en
Priority to JP2007025328A priority patent/JP4437823B2/en
Application granted granted Critical
Publication of JP4007450B2 publication Critical patent/JP4007450B2/en
Priority to JP2009247256A priority patent/JP4605613B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10DINORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D84/00Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
    • H10D84/101Integrated devices comprising main components and built-in components, e.g. IGBT having built-in freewheel diode
    • H10D84/141VDMOS having built-in components
    • H10W72/5473
    • H10W90/753
    • H10W90/756

Landscapes

  • Semiconductor Integrated Circuits (AREA)
  • Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
  • Electronic Switches (AREA)
  • Protection Of Static Devices (AREA)
  • Insulated Gate Type Field-Effect Transistor (AREA)
  • Thin Film Transistor (AREA)

Abstract

(57)【要約】 【目的】 実装効率の優れた過熱保護または過電流保護
内蔵パワーMOSFETを提供すること。 【構成】 第1の半導体チップと第2の半導体チップと
を樹脂封止により同一パッケージに実装した半導体装置
において、第1の半導体チップにパワーMOSFETを
形成し、第2の半導体チップは、パワーMOSFETを
保護する回路を形成する。 【効果】 同一パッケージに小型化した保護回路内蔵パ
ワーMOSFETを実現することが可能となる。
(57) [Summary] [Object] To provide a power MOSFET with built-in overheat protection or overcurrent protection having excellent mounting efficiency. In a semiconductor device in which a first semiconductor chip and a second semiconductor chip are mounted in the same package by resin sealing, a power MOSFET is formed on the first semiconductor chip, and the second semiconductor chip is a power MOSFET. To protect the circuit. [Effect] It is possible to realize a miniaturized power MOSFET with a built-in protection circuit in the same package.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は大電力を扱う半導体素子
に係り、特に、大電力用半導体素子の過熱並びに過電流
保護回路並びにこれを有する半導体装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor element handling a large amount of electric power, and more particularly to a circuit for protecting an overheat and an overcurrent of a large electric power semiconductor element and a semiconductor device having the same.

【0002】[0002]

【従来の技術】過熱遮断回路を内蔵するパワーMOSF
ETの例としては、特開昭63−229758号公報が
ある。この従来例では本体のパワーMOSFETのゲー
ト端子と外部ゲート端子の間にゲート抵抗を、ゲート端
子に保護回路用MOSFETを設け、本体パワーMOS
FETが過熱状態になったとき保護回路用MOSFET
をオンし、ゲート抵抗に電流を流すことにより、本体パ
ワーMOSFETのゲート端子電圧を下げて本体パワー
MOSFETを遮断し、過熱による素子破壊を防止して
いた。
2. Description of the Related Art Power MOSF incorporating an overheat cutoff circuit
As an example of ET, there is JP-A-63-229758. In this conventional example, a gate resistance is provided between the gate terminal of the power MOSFET of the main body and the external gate terminal, and a MOSFET for the protection circuit is provided at the gate terminal.
MOSFET for protection circuit when FET is overheated
Then, the gate terminal voltage of the main body power MOSFET is lowered by turning on the gate resistance and flowing a current through the gate resistance to shut off the main body power MOSFET, thereby preventing the element destruction due to overheating.

【0003】[0003]

【発明が解決しようとする課題】この従来の過熱遮断回
路内蔵パワーMOSFETの回路例では、外部ゲート端
子の電圧を5〜10V程度降圧して、本体のパワーMO
SFETを遮断する必要からゲート抵抗が大きく、遮断
用電流も大きくなるという問題があった。例えばこの場
合、ゲート抵抗を5kΩ程度にする必要があり、保護回
路用MOSFETには過熱遮断動作時に1〜2mA程度
の大電流を流す必要があった。このため、従来の過熱遮
断回路用パワーMOSFETは高周波パルス駆動ではゲ
ート遅延時間が大きくなりスイッチング損失が大きくな
るという問題があった。また、過熱遮断動作時には保護
回路用MOSFETがオンとなるので、外部ゲート端子
のゲート電流が大きくなり、駆動回路の消費電力が大き
くなるという問題があった。
In this conventional circuit example of the power MOSFET having a built-in overheat cutoff circuit, the voltage of the external gate terminal is stepped down by about 5 to 10 V and the power MO of the main body is reduced.
Since it is necessary to cut off the SFET, there is a problem that the gate resistance is large and the breaking current is also large. For example, in this case, the gate resistance needs to be set to about 5 kΩ, and a large current of about 1 to 2 mA needs to flow through the protection circuit MOSFET during the overheat cutoff operation. Therefore, the conventional power MOSFET for an overheat cutoff circuit has a problem that the gate delay time becomes large and the switching loss becomes large in the high frequency pulse driving. Further, since the protection circuit MOSFET is turned on during the overheat cutoff operation, there is a problem that the gate current of the external gate terminal is increased and the power consumption of the drive circuit is increased.

【0004】従って本発明の目的とするところは、高周
波パルス駆動が可能でスイッチング損失が小さく、過熱
遮断動作後のゲート電流も小さい、パワーMOSFET
の保護回路ならびに保護回路を有する保護回路内蔵パワ
ーMOSFETを提供することにある。
Therefore, an object of the present invention is to provide a power MOSFET capable of high frequency pulse driving, having a small switching loss, and having a small gate current after an overheat cutoff operation.
And a power MOSFET with a built-in protection circuit having the protection circuit.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に、本発明の一実施形態によれば、第1のスイッチング
素子(M0)の入力端子(4)とこの駆動回路(10)
の間に第2のスイッチング素子(M7)または可変抵抗
素子を設け、前記第1のスイッチング素子(M0)の入
力端子(4)に第3のスイッチング素子(M5)を設
け、さらに、前記第1のスイッチング素子(M0)の温
度検出回路または電流検出回路(12)を設け、この温
度検出回路または電流検出回路(12)により、前記第
3のスイッチング素子(M5)をオン、前記第2のスイ
ッチング素子(M7)をオフまたは高インピーダンスと
せしめることを特徴とするものである(図1参照)。
In order to achieve the above object, according to one embodiment of the present invention, an input terminal (4) of a first switching element (M0) and a driving circuit (10) thereof are provided.
A second switching element (M7) or a variable resistance element is provided between the first switching element (M0) and a third switching element (M5) at the input terminal (4) of the first switching element (M0), and the first switching element (M5) is further provided. A temperature detection circuit or a current detection circuit (12) for the switching element (M0) is provided, and the temperature detection circuit or the current detection circuit (12) turns on the third switching element (M5) to turn on the second switching element. It is characterized in that the element (M7) is turned off or has a high impedance (see FIG. 1).

【0006】さらに、本発明の他の一実施形態によれ
ば、前記第1のスイッチング素子(M0)と、前記第3
のスイッチング素子(M5)と前記温度検出回路または
電流検出回路(12)を第1の半導体チップ(104)
に内蔵し、前記第2のスイッチング素子(M7)または
前記可変抵抗素子を有する第2の半導体チップ(10
6)と同一パッケージに内蔵したことを特徴とするもの
である(図5参照)。
According to another embodiment of the present invention, the first switching element (M0) and the third switching element (M0)
The switching element (M5) and the temperature detection circuit or the current detection circuit (12) of the first semiconductor chip (104).
A second semiconductor chip (10) which is built in the device and has the second switching element (M7) or the variable resistance element.
It is characterized by being incorporated in the same package as 6) (see FIG. 5).

【0007】さらに、本発明の好適な他の実施形態によ
れば、前記第2のスイッチング素子(M7)または前記
可変抵抗素子が前記第1のスイッチング素子(M0)と
絶縁層(1006または1002)を介して、同一チッ
プ上に設けたことを特徴とするものである(図3と図4
を参照)。
Furthermore, according to another preferred embodiment of the present invention, the second switching element (M7) or the variable resistance element is connected to the first switching element (M0) and an insulating layer (1006 or 1002). It is characterized in that it is provided on the same chip through (FIGS. 3 and 4).
See).

【0008】[0008]

【作用】本発明の代表的な実施形態では、負荷短絡事故
または放熱条件の悪化によりパワーMOSFETが過熱
状態または過電流状態になった場合でもドレイン電流を
制限するか遮断することにより素子破壊を防止するパワ
ーMOSFETの保護回路として、従来のゲート抵抗の
代わりにPチャネルMOSFET(M7)を用いている
ことが特徴である(図1参照)。本実施形態では、第1
のスイッチング素子であるパワーMOSFET(M0)
が正常動作している場合には第2のスイッチング素子で
あるPチャネルMOSFET(M7)がオン状態、第3
のスイッチング素子であるNチャネルMOSFET(M
5)がオフ状態である。このため、駆動回路10の出力
電圧はそのまま等価的に低いゲート抵抗を介して、第1
のスイッチング素子であるパワーMOSFET(M0)
のゲート端子(4)に印加される。ところが、パワーM
OSFETが過熱状態または過電流状態になった場合に
は制御回路(11)により、第2のスイッチング素子で
あるPチャネルMOSFET(M7)がオフ状態、第3
のスイッチング素子であるNチャネルMOSFET(M
5)がオン状態になる。この時、駆動回路10の出力端
子は、第1のスイッチング素子であるパワーMOSFE
T(M0)のゲート端子と遮断される。このため、保護
動作時の低いドレイン電流がNチャネルMOSFET
(M5)によりバイパスされパワーMOSFET(M
0)を高速に遮断できる。本発明の他の実施形態では、
パワーMOSFETの温度をできるだけ正確に測定する
ため、またはパワーMOSFETの電流をカレントミラ
ー構成で検出するために、温度検出回路または電流検出
回路は本体のパワーMOSFET(M0)と同一の第1
の半導体チップ(104)に形成し、第2のスイッチン
グ素子であるPチャネルMOSFET(M7)はパワー
MOSFET(M0)のドレイン領域(図3の100
0)に形成することが不可能なため、第2の半導体チッ
プ(106)に形成し、両チップの分離のため絶縁板
(105)を前記第2の半導体チップ(106)の下に
設けて同一パッケージに実装した。このため、前述の高
性能な過熱保護回路または過電流保護回路を内蔵したパ
ワーMOSFETを従来と同じ小型のパッケージに実装
できるという利点がある(図5参照)。また、他の実施
形態として、PチャネルMOSFETを絶縁層(100
6または1002)を介してパワーMOSFETのドレ
イン領域(1000)と分離することも可能である(図
3または図4参照)。本発明のその他の目的と特徴は、
以下の実施例から明らかとなろう。
In a typical embodiment of the present invention, even if the power MOSFET is in an overheated state or an overcurrent state due to a load short-circuit accident or deterioration of heat radiation conditions, the drain current is limited or cut off to prevent element destruction. As a protection circuit for the power MOSFET, a P-channel MOSFET (M7) is used instead of the conventional gate resistance (see FIG. 1). In this embodiment, the first
Power MOSFET (M0) which is the switching element of
Is operating normally, the P-channel MOSFET (M7) which is the second switching element is in the on state,
N-channel MOSFET (M
5) is off. For this reason, the output voltage of the drive circuit 10 remains unchanged from the first voltage through the equivalently low gate resistance.
Power MOSFET (M0) which is the switching element of
Applied to the gate terminal (4). However, power M
When the OSFET becomes overheated or overcurrent, the control circuit (11) turns off the P-channel MOSFET (M7) that is the second switching element, and the third
N-channel MOSFET (M
5) is turned on. At this time, the output terminal of the drive circuit 10 is the power MOSFE which is the first switching element.
It is disconnected from the gate terminal of T (M0). Therefore, the low drain current during the protection operation is
Bypassed by (M5) power MOSFET (M
0) can be cut off at high speed. In another embodiment of the invention,
In order to measure the temperature of the power MOSFET as accurately as possible, or to detect the current of the power MOSFET in a current mirror configuration, the temperature detection circuit or the current detection circuit is the same as the power MOSFET (M0) of the main body.
The P-channel MOSFET (M7) which is a second switching element formed on the semiconductor chip (104) of the power MOSFET (M0) has a drain region (100 of FIG. 3).
0), it is impossible to form it on the second semiconductor chip (106), and an insulating plate (105) is provided under the second semiconductor chip (106) to separate the two chips. It mounted in the same package. Therefore, there is an advantage that the power MOSFET having the above-described high-performance overheat protection circuit or overcurrent protection circuit built therein can be mounted in the same small package as the conventional one (see FIG. 5). In another embodiment, a P-channel MOSFET is used as an insulating layer (100
6 or 1002) to be separated from the drain region (1000) of the power MOSFET (see FIG. 3 or FIG. 4). Other objects and features of the present invention include:
It will be apparent from the examples below.

【0009】[0009]

【実施例】図1は本発明の第1の実施例の回路図であ
る。本実施例は負荷短絡事故または放熱条件の悪化によ
りパワーMOSFETが過熱状態または過電流状態にな
った場合でもドレイン電流を制限するか遮断することに
よりパワーMOSFETの破壊を防止する保護回路であ
る。本図で、M0はパワーMOSFET、12はM0の
温度検出回路または電流検出回路、11はM5とM7の
制御回路である。従来の過電流または過熱保護回路では
パワーMOSFET(M0)のゲート端子4と駆動回路
10との間にはゲート抵抗を用い、過熱遮断または過電
流保護動作を行う場合にはM5をオンし、ゲート抵抗の
電圧降下によりパワーMOSFET(M0)の電流制御
または電流遮断を行っていた。これに対し本実施例では
ゲート抵抗の代わりにPチャネルMOSFET(M7)
を用いていることが特徴である。本実施形態では、パワ
ーMOSFET(M0)が正常動作している場合にはP
チャネルMOSFET(M7)がオン状態、Nチャネル
MOSFET(M5)がオフ状態である。このため、駆
動回路10の出力電圧はそのまま等価的に低いゲート抵
抗を介して、パワーMOSFET(M0)のゲート端子
(4)に印加される。一方、パワーMOSFETが過熱
状態または過電流状態になった場合には制御回路(1
1)により、PチャネルMOSFET(M7)がオフ、
NチャネルMOSFET(M5)がオンする。この時、
駆動回路10の出力端子は、パワーMOSFET(M
0)のゲート端子(4)と遮断され、保護動作時の低い
ドレイン電流がNチャネルMOSFET(M5)により
バイパスされるので、パワーMOSFET(M0)を高
速に遮断できる。なお、外部ゲート端子(2)の電圧を
下げた場合にはPチャネルMOSFET(M7)のドレ
イン・ボディ間寄生ダイオ−ドに電流が流れて本体パワ
ーMOSFET(M0)が遮断する。従来の過熱遮断回
路内蔵パワーMOSFETの回路例では、ゲート抵抗を
5kΩ程度と高くし、前記保護回路用MOSFETには
遮断状態に1〜2mA程度の大電流を流すことにより、
外部ゲート端子の電圧を5〜10V程度降圧し、本体の
パワーMOSFETを遮断していた。このため、従来の
過熱遮断回路用パワーMOSFETは高周波のパルス駆
動は不可能であり、また、ゲート遅延時間が大きくなる
ためスイッチング損失が大きくなるという問題があっ
た。また、過熱遮断回路が働いた後のゲート電流が高い
ため、駆動回路の消費電力が高くなるという問題があっ
た。これに対し、図1の本発明の実施例では通常の駆動
時には、等価的なゲート抵抗が小さいため高周波のパル
ス駆動が可能でスイッチング損失も小さいという利点が
ある。また、遮断動作時には等価的ゲート抵抗が高くな
るため、過熱遮断回路が働いた後のゲート電流が小さ
く、過熱遮断のためのスイッチング時間が短くなるとい
う利点がある。
1 is a circuit diagram of a first embodiment of the present invention. The present embodiment is a protection circuit that prevents the power MOSFET from being destroyed by limiting or cutting off the drain current even when the power MOSFET becomes overheated or overcurrent due to a load short-circuit accident or deterioration of heat dissipation conditions. In the figure, M0 is a power MOSFET, 12 is a temperature detection circuit or current detection circuit of M0, and 11 is a control circuit of M5 and M7. In the conventional overcurrent or overheat protection circuit, a gate resistor is used between the gate terminal 4 of the power MOSFET (M0) and the drive circuit 10, and when overheat cutoff or overcurrent protection operation is performed, M5 is turned on to turn on the gate. Current control or current interruption of the power MOSFET (M0) is performed by the voltage drop of the resistor. On the other hand, in this embodiment, a P-channel MOSFET (M7) is used instead of the gate resistance.
Is characterized by using. In this embodiment, when the power MOSFET (M0) is operating normally, P
The channel MOSFET (M7) is on and the N channel MOSFET (M5) is off. Therefore, the output voltage of the drive circuit 10 is directly applied to the gate terminal (4) of the power MOSFET (M0) via the equivalently low gate resistance. On the other hand, when the power MOSFET becomes overheated or overcurrent, the control circuit (1
1) turns off the P-channel MOSFET (M7),
The N-channel MOSFET (M5) turns on. At this time,
The output terminal of the drive circuit 10 is a power MOSFET (M
0) gate terminal (4) and the low drain current at the time of protection operation is bypassed by the N-channel MOSFET (M5), so that the power MOSFET (M0) can be interrupted at high speed. When the voltage of the external gate terminal (2) is lowered, a current flows in the drain-body parasitic diode of the P-channel MOSFET (M7) and the main body power MOSFET (M0) is cut off. In the conventional circuit example of the power MOSFET with a built-in overheat cutoff circuit, the gate resistance is increased to about 5 kΩ, and a large current of about 1 to 2 mA is applied to the protection circuit MOSFET in a cutoff state.
The voltage of the external gate terminal was lowered by about 5 to 10 V to shut off the power MOSFET of the main body. For this reason, the conventional power MOSFET for an overheat cutoff circuit has a problem that high frequency pulse driving is impossible and the gate delay time becomes long, resulting in large switching loss. In addition, there is a problem that the power consumption of the drive circuit becomes high because the gate current after the overheat cutoff circuit works is high. On the other hand, the embodiment of the present invention shown in FIG. 1 has an advantage that a high frequency pulse drive is possible and a switching loss is small because the equivalent gate resistance is small during normal driving. In addition, since the equivalent gate resistance increases during the cutoff operation, there is an advantage that the gate current after the overheat cutoff circuit works is small and the switching time for cutoff overheat is short.

【0010】図2は本発明の第2の実施例の回路図であ
る。本実施例は図1のブロック回路的な実施例を実際の
回路で表したものである。本実施例ではパワーMOSF
ETの温度検出回路として抵抗R4とダイオード列D1
〜D4を使用している。通常の動作時には、ゲート電圧
が外部ゲート端子2に印加された時、M1はオン状態に
なる。また、非対称型フリップフロップ構成のラッチ回
路の出力は抵抗R1を抵抗R2より十分高く設定するこ
とにより低電圧状態になる。このため、M7はオン状
態、M5はオフ状態となり、外部ゲート端子2に電圧が
印加される時の等価的なゲート抵抗は低くなる。一方、
負荷短絡事故等が発生しパワーMOSFETの温度が上
昇するとM1がオフし、ラッチ回路の状態が反転し、M
7がオフする。このため、遮断動作時には等価的ゲート
抵抗が高くなる。また、M5がオンするためパワーMO
SFET(M0)を高速に遮断でき、遮断動作後のゲー
ト電流が小さいという利点がある。
FIG. 2 is a circuit diagram of the second embodiment of the present invention. In this embodiment, the block circuit embodiment of FIG. 1 is represented by an actual circuit. In this embodiment, power MOSF
Resistor R4 and diode array D1 as ET temperature detection circuit
~ D4 is used. In normal operation, when the gate voltage is applied to the external gate terminal 2, M1 is turned on. Further, the output of the latch circuit of the asymmetrical flip-flop configuration becomes a low voltage state by setting the resistance R1 sufficiently higher than the resistance R2. Therefore, M7 is turned on and M5 is turned off, and the equivalent gate resistance when a voltage is applied to the external gate terminal 2 is lowered. on the other hand,
When a load short-circuit accident occurs and the temperature of the power MOSFET rises, M1 is turned off, the state of the latch circuit is reversed, and M1
7 turns off. Therefore, the equivalent gate resistance becomes high during the interruption operation. Also, since the M5 is turned on, the power MO
There is an advantage that the SFET (M0) can be cut off at high speed and the gate current after the cutoff operation is small.

【0011】図3は本発明の第3の実施例の半導体装置
の断面図である。本実施例は図2の回路で、1を外部ド
レイン、2を外部ゲート、3を外部ソースとして、1チ
ップ化するための半導体装置の断面構造である。101
5は本体パワーMOSFET(図2のM0)のドレイン
電極、1000はN型エピタキシャル領域で本体パワー
MOSFETのドレイン領域、1007aはゲート用多
結晶シリコン層、1012aはN型拡散層で本体パワー
MOSFETのソース拡散層、1008はボディ領域と
なるP型拡散層、1011aはボディ領域のコンタクト
抵抗低減のためのP型拡散層である。また、図の右側に
はM5等に用いる保護回路用のNチャネルMOSFET
を示す。1012bはドレインまたはソース用のN型拡
散層、1005はP型ウエル拡散層、1011bはボデ
ィ領域のコンタクト抵抗低減のためのP型拡散層、10
07bはゲート用多結晶シリコン層である。また、中央
にはM7に用いる保護回路用PチャネルMOSFETを
示してある。1007dと1007eは1007aと同
一工程で形成される多結晶シリコン層で、1007eは
低濃度のN型不純物をドープしたボディ領域、1007
dは1011aの高濃度P型ドープと同一工程により高
濃度P型領域にしてある。また、1010は多結晶シリ
コンゲート層である。本実施例の特長は、M7に用いる
PチャネルMOSFETを絶縁層1006により本体パ
ワーMOSFETと分離された領域に形成してある点で
ある。このため、本実施例では、従来のパワーMOSF
ET製造プロセスとほぼ同様な低コストプロセスで図2
に示した高性能化した過熱遮断回路パワーMOSFET
を実現できるという利点がある。
FIG. 3 is a sectional view of a semiconductor device according to the third embodiment of the present invention. This embodiment is a circuit of FIG. 2 and shows a cross-sectional structure of a semiconductor device for forming one chip by using 1 as an external drain, 2 as an external gate, and 3 as an external source. 101
Reference numeral 5 is a drain electrode of the main body power MOSFET (M0 in FIG. 2), 1000 is an N-type epitaxial region which is a drain area of the main body power MOSFET, 1007a is a polycrystalline silicon layer for gate, 1012a is an N-type diffusion layer which is a source of the main body power MOSFET. Diffusion layer, 1008 is a P-type diffusion layer to be a body region, and 1011a is a P-type diffusion layer for reducing the contact resistance of the body region. Also, on the right side of the figure, an N-channel MOSFET for a protection circuit used for M5 or the like.
Indicates. 1012b is an N-type diffusion layer for drain or source, 1005 is a P-type well diffusion layer, 1011b is a P-type diffusion layer for reducing the contact resistance of the body region, 10
Reference numeral 07b is a gate polysilicon layer. In the center, a P-channel MOSFET for protection circuit used for M7 is shown. 1007d and 1007e are polycrystalline silicon layers formed in the same step as 1007a, 1007e is a body region doped with a low concentration of N-type impurities, and 1007
d is a high-concentration P-type region by the same step as the high-concentration P-type doping of 1011a. Further, 1010 is a polycrystalline silicon gate layer. The feature of this embodiment is that the P-channel MOSFET used for M7 is formed in a region separated from the main body power MOSFET by the insulating layer 1006. Therefore, in this embodiment, the conventional power MOSF is used.
It is a low-cost process that is similar to the ET manufacturing process.
High performance overheat cutoff circuit power MOSFET shown in
There is an advantage that can be realized.

【0012】図4は本発明の第4の実施例の半導体装置
である。本実施例も図2の回路で、1を外部ドレイン、
2を外部ゲート、3を外部ソースとして、1チップ化す
るための半導体装置の断面構造である。本実施例では誘
電体分離構造で本発明の回路を実現している。本構造で
は最初にN型基板1000の下側に溝を形成、高濃度N
型埋込層1001の形成、絶縁酸化膜1002の形成を
行った後、パワーMOSFET部直下の酸化膜1002
を除去し、シリコン層(1003と1004)の形成を
行う。このとき、絶縁酸化膜1002の下には多結晶シ
リコン層1003、絶縁酸化膜1002を除去した領域
には単結晶シリコン層1004が形成される。この後、
N型シリコン層1000の上側を削り平坦化し、通常の
パワーMOSFETと同様の工程を経ることにより本構
造が得られる。本実施例の場合にはM7に用いるPチャ
ネルMOSFETは絶縁層1002により本体パワーM
OSFETと分離された領域に形成してある。このた
め、図3の実施例の場合と同様にPチャネルMOSFE
Tのソースまたはドレインと本体パワーMOSFETの
ドレインを分離できる。本実施例は図3に比べ製造方法
が複雑になるが、PチャネルMOSFETを単結晶シリ
コン層内に形成できるため、図3の場合に比べPチャネ
ルMOSFETのオン抵抗を下げやすいという利点があ
る。また、M5等の保護回路用NチャネルMOSFET
も本体パワーMOSFETと絶縁層1002により分離
して形成できるため、寄生バイポーラトランジスタの動
作等による誤動作を防止できるという利点がある。
FIG. 4 shows a semiconductor device according to a fourth embodiment of the present invention. In the present embodiment, the circuit shown in FIG.
2 is an external gate, 3 is an external source, and is a cross-sectional structure of a semiconductor device for one chip. In this embodiment, the circuit of the present invention is realized by the dielectric isolation structure. In this structure, first, a groove is formed on the lower side of the N-type substrate 1000, so
After forming the mold burying layer 1001 and the insulating oxide film 1002, the oxide film 1002 immediately below the power MOSFET portion is formed.
Are removed, and silicon layers (1003 and 1004) are formed. At this time, a polycrystalline silicon layer 1003 is formed below the insulating oxide film 1002, and a single crystal silicon layer 1004 is formed in a region where the insulating oxide film 1002 is removed. After this,
The upper structure of the N-type silicon layer 1000 is ground and flattened, and the same process as that of a normal power MOSFET is performed to obtain this structure. In the case of the present embodiment, the P-channel MOSFET used for M7 has a body power of M due to the insulating layer 1002.
It is formed in a region separated from the OSFET. Therefore, as in the case of the embodiment of FIG. 3, the P channel MOSFE is used.
The source or drain of T and the drain of the body power MOSFET can be separated. Although the manufacturing method of the present embodiment is more complicated than that of FIG. 3, the P-channel MOSFET can be formed in the single crystal silicon layer, so that there is an advantage that the ON resistance of the P-channel MOSFET can be easily lowered as compared with the case of FIG. In addition, N-channel MOSFET for protection circuit such as M5
Since it can be formed separately from the main body power MOSFET and the insulating layer 1002, there is an advantage that malfunction due to operation of the parasitic bipolar transistor can be prevented.

【0013】図5は本発明の第5の実施例の半導体装置
である。本実施例では本体パワーMOSFET(M0)
と、保護回路用のNチャネルMOSFET(M5)と前
記温度検出回路または電流検出回路(12)を第1の半
導体チップ(104)に内蔵し、保護回路用のPチャネ
ルMOSFET(M7)を第2の半導体チップ(10
6)に形成し破線で示す同一の樹脂封止パッケージ中に
実装したことを特徴とするものである。第1の半導体チ
ップ(104)では裏面が本体パワーMOSFETのド
レインであるため、第2の半導体チップ(106)は絶
縁板(105)の上に形成し、PチャネルMOSFET
(M7)と本体パワーMOSFET(M0)を分離して
いる。110は本体パワーMOSFETのゲート端子用
パッド(図2の4に対応)、111は本体パワーMOS
FETのソース端子用パッド、112はM7のゲート端
子を制御するための端子用パッド、113は第1の半導
体チップ上の外部ゲート端子用パッドで制御回路部の電
源電圧を供給する。また、107はM7のドレイン端子
用パッド、108はM7のゲート端子用パッド、109
はM7のソース端子用パッドである。本実施例では実装
方式を改良することにより、PチャネルMOSFETで
あるM7を本体パワーMOSFETと同一パッケージに
実装し小型化した。本実施例によっても図3や図4で示
した1チップで実現する保護回路内蔵パワーMOSFE
Tと同様の効果が得られる。
FIG. 5 shows a semiconductor device according to a fifth embodiment of the present invention. In this embodiment, the main body power MOSFET (M0)
An N-channel MOSFET (M5) for the protection circuit and the temperature detection circuit or the current detection circuit (12) built in the first semiconductor chip (104), and a P-channel MOSFET (M7) for the protection circuit second. Semiconductor chips (10
It is characterized in that it is mounted in the same resin-sealed package formed in 6) and shown by a broken line. Since the back surface of the first semiconductor chip (104) is the drain of the main body power MOSFET, the second semiconductor chip (106) is formed on the insulating plate (105), and the P-channel MOSFET is formed.
(M7) and the main body power MOSFET (M0) are separated. 110 is a pad for a gate terminal of the main body power MOSFET (corresponding to 4 in FIG. 2), 111 is a main body power MOS
A FET source terminal pad, 112 is a terminal pad for controlling the gate terminal of M7, and 113 is an external gate terminal pad on the first semiconductor chip, which supplies the power supply voltage of the control circuit unit. 107 is a pad for drain terminal of M7, 108 is a pad for gate terminal of M7, 109
Is a pad for the source terminal of M7. In this embodiment, by improving the mounting method, the M7, which is a P-channel MOSFET, is mounted in the same package as the main body power MOSFET to reduce the size. Also in this embodiment, the power MOSFE with a built-in protection circuit realized by one chip shown in FIG. 3 and FIG.
The same effect as T can be obtained.

【0014】図6は本発明の第6の実施例の回路図であ
る。本実施例では図2の抵抗R1、R2、R3、R4を
PチャネルMOSFET M9、M10、M8、M6に
置き換えた場合の実施例である。本実施例では図2の場
合に比べ保護回路の占有面積を小さくすることができ、
また、保護回路部のスイッチング速度が高速化できると
いう効果がある。ここで、PチャネルMOSFET M
9、M10、M8、M6は図3や図4の半導体素子構造
を用いることによりM7と同様に本体素子と同一チップ
に共存可能である。また、PチャネルMOSFET M
9、M10、M8、M11は図5の第2の半導体チップ
106に共存させることにより、本体パワーMOSFE
Tと同一パッケージに形成することも可能である。
FIG. 6 is a circuit diagram of a sixth embodiment of the present invention. In this embodiment, the resistors R1, R2, R3 and R4 of FIG. 2 are replaced with P-channel MOSFETs M9, M10, M8 and M6. In this embodiment, the area occupied by the protection circuit can be reduced as compared with the case of FIG.
Further, there is an effect that the switching speed of the protection circuit unit can be increased. Here, P-channel MOSFET M
9, M10, M8, and M6 can coexist on the same chip as the main body element by using the semiconductor element structure shown in FIGS. In addition, P-channel MOSFET M
9, M10, M8, and M11 coexist in the second semiconductor chip 106 of FIG.
It is also possible to form it in the same package as T.

【0015】図7は本発明の第7の実施例の回路図であ
る。本実施例では図2のPチャネルMOSFETの代わ
りにデプレッション型NチャネルMOSFET(M1
2)を用いた場合の実施例である。ここで、デプレッシ
ョン型NチャネルMOSFET(M12)はスイッチン
グ素子または可変ゲート抵抗として振る舞う。すなわ
ち、パワーMOSFET(M0)が正常動作している場
合にはM12のゲート電圧は高電位のためM12はオン
状態(低インピーダンス状態)、第3のスイッチング素
子であるNチャネルMOSFET(M5)はオフ状態で
ある。このため、外部ゲート端子2の電圧はそのまま等
価的に低いゲート抵抗を介して、パワーMOSFET
(M0)のゲート端子(4)に印加される。このため、
高周波パルス駆動回路にも低損失で使用可能である。一
方、パワーMOSFETが過熱状態になった場合にはM
12のゲート電位が下がるためM12はほぼオフ状態ま
たは高インピーダンス状態になり、また、NチャネルM
OSFET(M5)はオンする。このため、Nチャネル
MOSFET(M5)の電流駆動能力が低くても本体パ
ワーMOSFET(M0)を高速に遮断できるという効
果がある(図2の実施例と同様の効果がある)。本実施
例のデプレッション型NチャネルMOSFET(M1
2)は図3の制御用NチャネルMOSFETと同様にP
型ウエル構造の中に形成し、ゲート直下のP型ウエルの
表面だけをイオン打ち込みによりN型化することにより
実現できる。本実施例では、図3や図4に比べ半導体装
置の製造方法が簡単であるという利点がある。なお、M
12はエンハンス型素子を使用することも可能である。
また、多結晶シリコンダイオードD6を追加した場合に
は外部ゲート端子2によるパワーMOSFET(M0)
の遮断を高速に行なえるという効果がある。
FIG. 7 is a circuit diagram of the seventh embodiment of the present invention. In this embodiment, instead of the P-channel MOSFET of FIG. 2, a depletion type N-channel MOSFET (M1
This is an example of using 2). Here, the depletion type N-channel MOSFET (M12) behaves as a switching element or a variable gate resistor. That is, when the power MOSFET (M0) is operating normally, the gate voltage of M12 is at a high potential, so M12 is in the ON state (low impedance state) and the N-channel MOSFET (M5) that is the third switching element is OFF. It is in a state. Therefore, the voltage of the external gate terminal 2 is equivalently passed through the equivalently low gate resistance to the power MOSFET.
It is applied to the gate terminal (4) of (M0). For this reason,
It can also be used in high frequency pulse drive circuits with low loss. On the other hand, when the power MOSFET becomes overheated, M
Since the gate potential of M12 is lowered, M12 is almost turned off or in a high impedance state.
The OSFET (M5) turns on. Therefore, there is an effect that the main body power MOSFET (M0) can be cut off at high speed even if the current driving capability of the N-channel MOSFET (M5) is low (the same effect as the embodiment of FIG. 2). The depletion type N-channel MOSFET (M1
2) is P as in the control N-channel MOSFET of FIG.
It can be realized by forming it in a well structure and making only the surface of the P well directly under the gate into an N type by ion implantation. This embodiment has an advantage that the method for manufacturing a semiconductor device is simpler than that shown in FIGS. In addition, M
It is also possible to use an enhancement type element 12.
When a polycrystalline silicon diode D6 is added, a power MOSFET (M0) with an external gate terminal 2
There is an effect that can be cut off at high speed.

【0016】図8は本発明の第8の実施例の回路図であ
る。本実施例では図7の抵抗R1、R2、R3、R4を
デプレッション型NチャネルMOSFET M14、M
15、M13、R11に置き換えた場合の実施例であ
る。本実施例の場合には図7の場合に比べ、保護回路の
占有面積を小さくすることができ、また、保護回路部の
スイッチング速度が高速化できるという利点がある。
FIG. 8 is a circuit diagram of an eighth embodiment of the present invention. In this embodiment, the resistors R1, R2, R3 and R4 of FIG. 7 are connected to the depletion type N-channel MOSFETs M14 and M4.
This is an example in the case of replacing with 15, M13, and R11. Compared to the case of FIG. 7, the present embodiment has an advantage that the area occupied by the protection circuit can be reduced and the switching speed of the protection circuit unit can be increased.

【0017】図9は本発明の第9の実施例の回路図であ
る。これまでの実施例では、過熱遮断回路内蔵パワーM
OSFETを例にとり説明してきたが、本実施例では過
電流遮断回路内蔵パワーMOSFETを用いた場合を示
してある。本実施例では大きなサイズ(大きなチャネル
幅)の本体パワーMOSFET(M0)と同一チップに
小さなサイズ(小さなチャネル幅)のセンス用MOSF
ET(M15)を所謂カレントミラー接続して内蔵し、
本体パワーMOSFET(MO)に過電流が流れた場合
にセンス用MOSFET(M15)にもセンス電流が流
れる電流検出回路を実現している。通常、外部ゲート端
子に電圧が印加されるとセンス用MOSFET(M1
5)のソース電位(5)が低電位のためM5はオフ、M
17はオフ、M16はオン、M7はオン状態である。こ
のため、外部ゲート端子(2)の印加電圧はそのまま等
価的に低いゲート抵抗を介して、パワーMOSFET
(M0)のゲート端子(4)に印加される。一方、パワ
ーMOSFETが過電流状態になった場合にはM15の
ソース電圧が増加するため、上記と逆にPチャネルMO
SFET(M7)がオフ、NチャネルMOSFET(M
5)がオンする。このため、低電流駆動能力を有するN
チャネルMOSFET(M5)を用いてもパワーMOS
FET(M0)を高速に遮断できる。本実施例では抵抗
R5〜R8の値、M7のオン抵抗、M5、M16、M1
7の電流駆動能力の設計値により、過電流時に本体パワ
ーMOSFETが遮断する過電流遮断回路内蔵パワーM
OSFETにも、電流を制御するだけの過電流制限回路
内蔵パワーMOSFETにもなる。本実施例の過電流保
護回路を有する半導体装置も図3、図4、図5の実施例
で述べた過熱保護回路内蔵パワーMOSFETと同じ構
造にて実現できる。
FIG. 9 is a circuit diagram of the ninth embodiment of the present invention. In the above embodiments, the power M with built-in overheat cutoff circuit is used.
Although the OSFET has been described as an example, the present embodiment shows the case where the power MOSFET with a built-in overcurrent cutoff circuit is used. In this embodiment, a small size (small channel width) sense MOSF is formed on the same chip as the main power MOSFET (M0) having a large size (large channel width).
Built-in ET (M15) with so-called current mirror connection,
A current detection circuit in which a sense current also flows in the sensing MOSFET (M15) when an overcurrent flows in the main body power MOSFET (MO) is realized. Normally, when a voltage is applied to the external gate terminal, the sensing MOSFET (M1
Since the source potential (5) of 5) is low, M5 is off, M5
17 is off, M16 is on, and M7 is on. Therefore, the voltage applied to the external gate terminal (2) is equivalently passed through the equivalently low gate resistance to the power MOSFET.
It is applied to the gate terminal (4) of (M0). On the other hand, when the power MOSFET is in the overcurrent state, the source voltage of M15 increases, and conversely to the above, the P-channel MO
SFET (M7) is off, N-channel MOSFET (M
5) turns on. Therefore, N having a low current drive capability
Power MOS even if a channel MOSFET (M5) is used
The FET (M0) can be cut off at high speed. In this embodiment, the values of the resistors R5 to R8, the on-resistance of M7, M5, M16, and M1.
Depending on the design value of the current drive capacity of 7, the power M with built-in overcurrent cutoff circuit that the main power MOSFET cuts off at the time of overcurrent
It can be an OSFET or a power MOSFET with a built-in overcurrent limiting circuit that only controls current. A semiconductor device having the overcurrent protection circuit of this embodiment can also be realized with the same structure as the power MOSFET with a built-in overheat protection circuit described in the embodiments of FIGS. 3, 4, and 5.

【0018】以上、本発明の実施例を詳細に説明した
が、本発明は上記の実施例に限定されるものではなく、
その技術思想の範囲内で種々の変形が可能である。例え
ば、以上の実施例では本体素子がパワーMOSFETの
場合に関して述べたが、本発明の回路技術は本体素子と
して、バイポーラトランジスタや絶縁ゲート型バイポー
ラトランジスタ(IGBT)を用いた場合にも適用可能
であることは言うまでもない。
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments.
Various modifications are possible within the scope of the technical idea. For example, although the case where the main body element is the power MOSFET has been described in the above embodiments, the circuit technology of the present invention is also applicable to the case where a bipolar transistor or an insulated gate bipolar transistor (IGBT) is used as the main body element. Needless to say.

【0019】[0019]

【発明の効果】本発明によれば、高周波パルス駆動時に
もスイッチング損失が小さく、また、本体素子の遮断動
作後のゲート電流が小さく、遮断動作が高速な過熱保護
または過電流保護回路内蔵パワーMOSFETが得られ
るという効果がある。
According to the present invention, a power MOSFET with a built-in overheat protection circuit or an overcurrent protection circuit, which has a small switching loss even when driving a high frequency pulse, has a small gate current after the cutoff operation of the main body element, and has a high cutoff operation. Is obtained.

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

【図1】本発明の第1の実施例の回路図である。FIG. 1 is a circuit diagram of a first embodiment of the present invention.

【図2】本発明の第2の実施例の回路図である。FIG. 2 is a circuit diagram of a second embodiment of the present invention.

【図3】本発明の第3の実施例の半導体装置の断面図で
ある。
FIG. 3 is a sectional view of a semiconductor device according to a third embodiment of the present invention.

【図4】本発明の第4の実施例の半導体装置の断面図で
ある。
FIG. 4 is a sectional view of a semiconductor device according to a fourth embodiment of the present invention.

【図5】本発明の第5の実施例の半導体装置の平面図で
ある。
FIG. 5 is a plan view of a semiconductor device according to a fifth embodiment of the present invention.

【図6】本発明の第6の実施例の回路図である。FIG. 6 is a circuit diagram of a sixth embodiment of the present invention.

【図7】本発明の第7の実施例の回路図である。FIG. 7 is a circuit diagram of a seventh embodiment of the present invention.

【図8】本発明の第8の実施例の回路図である。FIG. 8 is a circuit diagram of an eighth embodiment of the present invention.

【図9】本発明の第9の実施例の回路図である。FIG. 9 is a circuit diagram of a ninth embodiment of the present invention.

【符号の説明】 1、101…外部ドレイン端子、2、100…外部ゲー
ト端子、3、102…外部ソース端子、4…本体パワー
MOSFETの内部ゲート端子、5…センスMOSFE
Tのソース端子、10…駆動回路、11…制御回路、1
2…パワーMOSFETの温度検出回路または電流検出
回路、104…M0と温度検出回路または電流検出回路
を内蔵する第1の半導体チップ、105…絶縁板、10
6…M7を内蔵する第2の半導体チップ、107…第2
の半導体チップ上の本体パワーMOSFETの内部ゲー
ト用パッド、108…第2の半導体チップ上の本体パワ
ーMOSFETの内部ゲート用パッド、109…第2の
半導体チップ上の外部ゲート端子用パッド、110…第
1の半導体チップ上の本体パワーMOSFETの内部ゲ
ート用パッド111…第1の半導体チップ上の外部ソー
ス用パッド、112…M7またはM12のゲート制御用
端子パッド、113…第1の半導体チップ上の外部ゲー
ト用パッド、104…M0と温度検出回路または電流検
出回路を内蔵する第1の半導体チップ、1000…N型
基板またはN型エピタキシャル層、1001…高濃度N
型埋込層、1002、1006、1009、1013…
絶縁層、1003…高濃度N型多結晶シリコン層、10
04…高濃度N型単結晶シリコン層、1005…P型ウ
エル拡散層、1007a、1007b、1007c…多
結晶シリコン層、1008…P型チャネル拡散層、10
10…多結晶シリコン層(制御回路用P型MOSFET
部ゲート用)、1011a、1011b…高濃度P型拡
散層、1012a、1012b…高濃度N型拡散層、1
014、1015…電極層、R1〜R8…抵抗、D1〜
D6…ダイオ−ド、M0…パワーMOSFET、M1〜
M5、M16、M17…制御用NチャネルMOSFE
T、M6、M7、M8〜M10…制御用PチャネルMO
SFET、M11〜M15…制御用デプレッション型N
チャネルMOSFET。
[Description of Reference Signs] 1, 101 ... External drain terminal, 2, 100 ... External gate terminal, 3, 102 ... External source terminal, 4 ... Internal gate terminal of main body power MOSFET, 5 ... Sense MOSFE
Source terminal of T, 10 ... Driving circuit, 11 ... Control circuit, 1
2 ... Temperature detecting circuit or current detecting circuit of power MOSFET, 104 ... First semiconductor chip incorporating M0 and temperature detecting circuit or current detecting circuit, 105 ... Insulating plate, 10
6 ... second semiconductor chip incorporating M7, 107 ... second
Internal power supply MOSFET internal gate pad on the semiconductor chip, 108 ... Internal power supply MOSFET internal gate pad on the second semiconductor chip, 109 ... External gate terminal pad on the second semiconductor chip, 110 ... Internal gate pad 111 of the main body power MOSFET on one semiconductor chip ... External source pad on the first semiconductor chip 112 ... M7 or M12 gate control terminal pad 113 ... External on the first semiconductor chip Gate pad, 104 ... M0, first semiconductor chip incorporating temperature detection circuit or current detection circuit, 1000 ... N type substrate or N type epitaxial layer, 1001 ... High concentration N
Mold embedding layer, 1002, 1006, 1009, 1013 ...
Insulating layer, 1003 ... High-concentration N-type polycrystalline silicon layer, 10
04 ... High-concentration N-type single crystal silicon layer, 1005 ... P-type well diffusion layer, 1007a, 1007b, 1007c ... Polycrystalline silicon layer, 1008 ... P-type channel diffusion layer, 10
10 ... Polycrystalline silicon layer (P-type MOSFET for control circuit
(For partial gate), 1011a, 1011b ... high-concentration P-type diffusion layer, 1012a, 1012b ... high-concentration N-type diffusion layer, 1
014, 1015 ... Electrode layers, R1 to R8 ... Resistors, D1
D6 ... Diode, M0 ... Power MOSFET, M1 ...
M5, M16, M17 ... Control N-channel MOSFE
T, M6, M7, M8 to M10 ... P channel MO for control
SFET, M11 to M15 ... Depletion type N for control
Channel MOSFET.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) H01L 27/04 H01L 27/04 H 27/06 311 27/088 (72)発明者 森川 正敏 東京都国分寺市東恋ケ窪1丁目280番地 株式会社日立製作所中央研究所内 (72)発明者 大高 成雄 東京都小平市上水本町五丁目20番1号 株 式会社日立製作所半導体設計開発センタ内 Fターム(参考) 5F038 AZ07 AZ08 BH01 BH07 BH15 BH16 BH19 CA10 CA12 EZ06 EZ07 EZ20 5F048 AA02 AC03 AC06 AC10 BA01 BA06 BA12 BB03 BB05 BC03 BC05 BC12 BC16 BC18 BD10 BE02 BE09 BF16 BF18 BG07 BG12 CC01 CC06 CC09 CC18─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) H01L 27/04 H01L 27/04 H 27/06 311 27/088 (72) Inventor Masatoshi Morikawa Tokyo Kokubunji City 1-280 Higashi-Kengokubo Central Research Laboratory, Hitachi, Ltd. (72) Inventor Shigeo Otaka 5-20-1, Kamimizuhoncho, Kodaira-shi, Tokyo F-Term (Reference) 5F038 AZ07, Hitachi, Ltd. Semiconductor Design and Development Center AZ08 BH01 BH07 BH15 BH16 BH19 CA10 CA12 EZ06 EZ07 EZ20 5F048 AA02 AC03 AC06 AC10 BA01 BA06 BA12 BB03 BB05 BC03 BC05 BC12 BC16 BC18 BD10 BE02 BE09 BF16 BF18 BG07 BG12 CC01 CC06 CC09 CC18

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】第1の半導体チップと第2の半導体チップ
とを樹脂封止により同一パッケージに実装した半導体装
置において、第1の半導体チップは、パワーMOSFE
Tが形成され、第2の半導体チップは、上記パワーMO
SFETを保護する回路が形成されていることを特徴と
する半導体装置。
1. In a semiconductor device in which a first semiconductor chip and a second semiconductor chip are mounted in the same package by resin sealing, the first semiconductor chip is a power MOSFE.
T is formed, and the second semiconductor chip has the power MO
A semiconductor device comprising a circuit for protecting an SFET.
【請求項2】上記半導体装置は上記パッケージ外に導出
された第1端子、第2端子、第3端子とを具備し、上記
第1端子は上記第1の半導体チップの裏面と接続され、
上記第2端子は上記第2の半導体チップの表面に形成さ
れた第1パッドと接続され、上記第3端子は上記第1の
半導体チップの表面に形成され、上記パワーMOSFE
Tのソースと接続される第2パッドと接続され、 上記保護する回路は第1MOSFETを具備し、上記第
1MOSFETのソース・ドレイン経路は上記第1パッ
ドと、上記第1の半導体チップの表面に形成され、上記
パワーMOSFETのゲート電極と接続される第3パッ
ドとの間に接続されていることを特徴とする請求項1に
記載の半導体装置。
2. The semiconductor device comprises a first terminal, a second terminal, and a third terminal led out of the package, the first terminal being connected to the back surface of the first semiconductor chip,
The second terminal is connected to a first pad formed on the surface of the second semiconductor chip, the third terminal is formed on the surface of the first semiconductor chip, and the power MOSFE is provided.
The protection circuit includes a first MOSFET connected to a second pad connected to the source of T. The source / drain path of the first MOSFET is formed on the first pad and the surface of the first semiconductor chip. The semiconductor device according to claim 1, wherein the semiconductor device is connected between a gate electrode of the power MOSFET and a third pad connected thereto.
【請求項3】上記第1端子と上記第3端子との間に上記
第2端子は配置され、上記第1の半導体チップの長辺は
上記第2の半導体チップと並んで配置されていることを
特徴とする請求項1乃至請求項2のいずれかに記載の半
導体装置。
3. The second terminal is arranged between the first terminal and the third terminal, and the long side of the first semiconductor chip is arranged side by side with the second semiconductor chip. The semiconductor device according to claim 1, wherein the semiconductor device is a semiconductor device.
【請求項4】上記第1の半導体チップは、温度検出回路
または電流検出回路と、フリップフロップ回路と、上記
パワーMOSFETのゲートと上記第2パッドとの間に
ソース・ドレイン経路を有する第2MOSFETとを具
備し、 上記第1の半導体チップに形成されたMOSFETはN
型で、上記第2の半導体チップに形成されたMOSFE
TはP型であることを特徴とする請求項1乃至請求項3
のいずれかに記載の半導体装置。
4. The first semiconductor chip includes a temperature detection circuit or a current detection circuit, a flip-flop circuit, and a second MOSFET having a source / drain path between the gate of the power MOSFET and the second pad. And the MOSFET formed on the first semiconductor chip is N
Type, and a MOSFE formed on the second semiconductor chip
The T is a P type.
The semiconductor device according to any one of 1.
JP2003093135A 1993-02-22 2003-03-31 Semiconductor device Expired - Lifetime JP4007450B2 (en)

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JP2003093135A JP4007450B2 (en) 1993-02-22 2003-03-31 Semiconductor device
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JP2003093135A JP4007450B2 (en) 1993-02-22 2003-03-31 Semiconductor device
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JP2003093135A Expired - Lifetime JP4007450B2 (en) 1993-02-22 2003-03-31 Semiconductor device
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JP2007215181A (en) 2007-08-23
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JP4605613B2 (en) 2011-01-05

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