JPS6332965A - Manufacture of semiconductor device - Google Patents

Manufacture of semiconductor device

Info

Publication number
JPS6332965A
JPS6332965A JP17600986A JP17600986A JPS6332965A JP S6332965 A JPS6332965 A JP S6332965A JP 17600986 A JP17600986 A JP 17600986A JP 17600986 A JP17600986 A JP 17600986A JP S6332965 A JPS6332965 A JP S6332965A
Authority
JP
Japan
Prior art keywords
base
layer
resistor
bypass diode
collector
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
JP17600986A
Other languages
Japanese (ja)
Inventor
Naomichi Goto
後藤 直道
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.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP17600986A priority Critical patent/JPS6332965A/en
Publication of JPS6332965A publication Critical patent/JPS6332965A/en
Pending legal-status Critical Current

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  • Bipolar Transistors (AREA)

Abstract

PURPOSE:To break down a diode before the dielectric breakdown of a base series resistor thereby to prevent a permanent dielectric breakdown by connecting the base terminal end of the base series resistor of a transistor of a resistor-containing structure to a bypass diode having the same polarity as a base layer. CONSTITUTION:A transistor is composed by forming a base layer 3 and an emitter layer 4 on a collector high resistance layer 2 on a collector substrate 1, and a layer 5 having the same polarity as a base for forming a bypass diode is formed on the layer 2. The transistor surface is protected by an oxide film 6 except the electrode leads of the layers 4, 3 and the contact of the layer 5 for forming the bypass diode. Polycrystalline silicon resistors which form base series resistor 7 and a parallel resistor 8 between the base and an emitter are formed on the film 6. According to this structure, since the bypass diode breaks down before a dielectric breakdown occurs between the resistor 7 and the layer 2, it can prevent the dielectric breakdown of a permanent damage.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、トランジスタに関し、とくに抵抗内蔵構造の
トランジスタに関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transistor, and particularly to a transistor having a built-in resistor structure.

〔従来の技術〕[Conventional technology]

従来のこの種の抵抗内蔵構造のトランジスタでは、第3
図(a)に示すように、多結晶シリコンなど+7)ta
−に体7 、8をエミツタ層4お工ひベース層3が形成
され几コレクタ高抵抗層2上の酸化膜6上に形成し、所
望の抵抗値が得られるよう、ポリシリコン抵抗体7.8
の上へ電極アルミニウム9を蒸着形成するなどして、ベ
ース直列抵抗7及びベース・エミッタ間並列抵抗8を形
成していた。ここで、抵抗値の典型例は2にΩから10
0にΩ程度である。コレクタ高抵抗層2はコレクタ基板
l上に気相成長法で形成されており、ベース端子10エ
ミツタ端子11が電極アルミニウムに取り付けられてお
り、コレクタ電極金属12がコレクタ基板1の裏面に形
成されているこのように形成されたトランジスタの等何
回路が第3図(b)に示されている。
In conventional transistors with this type of resistor built-in structure, the third
As shown in figure (a), polycrystalline silicon etc.+7) ta
- Polysilicon resistors 7 and 8 are formed on the oxide film 6 on the emitter layer 4, the base layer 3 is formed, and the collector high resistance layer 2 to obtain the desired resistance value. 8
A base series resistor 7 and a base-emitter parallel resistor 8 were formed by depositing an aluminum electrode 9 on the base. Here, typical examples of resistance values range from 2 to 10Ω.
It is about Ω to 0. The collector high-resistance layer 2 is formed on the collector substrate l by a vapor phase growth method, the base terminal 10 emitter terminal 11 is attached to the electrode aluminum, and the collector electrode metal 12 is formed on the back surface of the collector substrate 1. A circuit of transistors formed in this manner is shown in FIG. 3(b).

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述した従来の抵抗内R構造のトランジスタは、酸化膜
の上に抵抗体が形成されていたため、コ/デンサ放電な
どの静電気に弱いという欠点があっ几。静電気放電上受
けたときの損傷は、つぎの2つのモードが支配的である
。ベース直列抵抗体7の損傷である。すなわち、一つは
、抵抗体の熱容量が小さいことによる静電エネルギーに
よる焼損であジ、他方は抵抗体のベース端子10側端と
酸化膜全弁して対向するコレクタ高抵抗層2との間の酸
化膜のP、sii破壊である。第一のモードに関しては
抵抗体7の体積全増大することで耐量の向上が図られて
いtoしたし、第二のモードは酸化膜6の厚さを厚くす
ることが一つの耐食向上策であるが、酸化膜6の厚さが
大きくなると、抵抗体7とトランジスタ動作部との熱抵
抗が増大し第一のモードの耐を全損なうという問題があ
っ九〇〔問題点を解決するための手段〕 本発明の半導体装ttは、コレクタ層お工びコレクタ層
上に形成され九ベース層お工ひエミッタ層金有するトラ
ンジスタの表面酸化層上に多結晶シリコンからなる抵抗
体とこれをベース直列抵抗及びベース・エミッタ間並列
抵抗となる様に接続するAe等の″FIlt極配線と、
このベース直列抵抗体のベース端子(1111の電極配
線との接続部にコレクタ層内に形成されたダイオードと
金有している。このコレクタ層内に形成され之ダイオー
ドに工ってベース直列抵抗の絶縁破壊に来る前にダイオ
ードを降伏せしめて恒久的な絶縁破壊を防いでいる。
The above-mentioned conventional transistor with an R-in-resistance structure has a resistor formed on an oxide film, so it has the disadvantage of being susceptible to static electricity such as co/capacitor discharge. Damage caused by electrostatic discharge is mainly caused by the following two modes. This is damage to the base series resistor 7. That is, one is burnout due to electrostatic energy due to the small heat capacity of the resistor, and the other is burnout between the end of the resistor on the base terminal 10 side and the collector high-resistance layer 2 that faces the entire oxide film. This is P,sii destruction of the oxide film. In the first mode, the resistance has been improved by increasing the total volume of the resistor 7, and in the second mode, one way to improve the corrosion resistance is to increase the thickness of the oxide film 6. However, as the thickness of the oxide film 6 increases, the thermal resistance between the resistor 7 and the transistor operating section increases, and the first mode resistance is completely lost. ] The semiconductor device tt of the present invention includes a resistor made of polycrystalline silicon on the surface oxide layer of a transistor formed on the collector layer, nine base layers, and an emitter layer formed on the collector layer, and a resistor made of polycrystalline silicon, and a resistor in series with the base. and “FIlt” polar wiring such as Ae, which is connected to form a parallel resistance between base and emitter,
The base terminal of this base series resistor (1111) has a diode formed in the collector layer at the connection part with the electrode wiring. This prevents permanent dielectric breakdown by allowing the diode to break down before dielectric breakdown occurs.

〔実施例〕〔Example〕

次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第1図は不発明の一実施例であ’) (alは断面図。Figure 1 shows an embodiment of the invention. (al is a cross-sectional view.

(b)は等価回路である。トランジスタはコレクタ基板
l上のコレクタ高抵抗RIJ2にベース層3及びエミッ
タ層4t−形成することによって構成され、コレクタ間
抵抗rff42にバイパスダイオードを構成するベース
と同じ極性の層5が設けられている。トランジスタ表面
は、エミツタ層4とベース層3との電極褥出部及びバイ
パスダイオードを形成した層5のコンタクト部を除いて
酸化膜6で保護されている。この酸化膜6の上にベース
直列抵抗7とベース・エミッタ間並列抵抗8t−構厄す
る多結晶シリコン抵抗体が形成され、その上に第1図(
b)の等価回路が構成されるようA1等の電極金属配線
9が施され、ベース端子10及びエミッタ端子11が外
部リードと接続される。裏面にはコレクタ電極金属12
がつけられ、外部リードと接続される。
(b) is an equivalent circuit. The transistor is constructed by forming a base layer 3 and an emitter layer 4t on a collector high resistance RIJ2 on a collector substrate l, and a layer 5 of the same polarity as the base constituting a bypass diode is provided on the collector-to-collector resistance rff42. The surface of the transistor is protected with an oxide film 6 except for the electrode protrusion portions of the emitter layer 4 and the base layer 3 and the contact portion of the layer 5 forming the bypass diode. On this oxide film 6, a base series resistor 7 and a base-emitter parallel resistor 8t - a troublesome polycrystalline silicon resistor are formed.
Electrode metal wiring 9 such as A1 is provided to configure the equivalent circuit of b), and the base terminal 10 and emitter terminal 11 are connected to external leads. Collector electrode metal 12 on the back side
is attached and connected to the external lead.

第1図(a) 、 (b)はNPN極性の場合を例示し
ているがPNP極性もN、l!:Pを交換すれば同様に
構成できる。
Figures 1 (a) and (b) illustrate the case of NPN polarity, but PNP polarity is also N, l! :P can be replaced in the same way.

本構造に工れば、ベース直列抵抗7がコレクタ高抵抗層
2との間で誘電破壊を起す前にバイパスダイオードがブ
レークダウンするので、恒久的な破壊である誘電破壊を
防ぐことができる。
With this structure, the bypass diode breaks down before dielectric breakdown occurs between the base series resistor 7 and the collector high resistance layer 2, so that dielectric breakdown, which is permanent breakdown, can be prevented.

第2図は本発明の他の実施例の断面図である。FIG. 2 is a sectional view of another embodiment of the invention.

ベース直列抵抗7を構成する多結晶シリコンのベース端
子端よジベース層31jliへ所望の距離aだけ近い部
分から、ポリシリコンを分枝してこの分枝抵抗13全介
してバイパスダイオードの層5へのコンタクト14が接
続されている。この実施例ではバイパスダイオードの位
置がベース端子りり離れた位置に形成できること、静電
気放電印加でバイパスダイオードがブレークダウンする
電圧が第1図の実施例ニジ、(バイパスダイオードの直
列抵抗)×(放電電流)に相当するだけ高くできる利点
がある。
The polysilicon is branched from the base terminal end of the polycrystalline silicon constituting the base series resistor 7 at a desired distance a distance from the base layer 31jli, and the wire is connected to the layer 5 of the bypass diode through all of the branched resistors 13. Contact 14 is connected. In this embodiment, the bypass diode can be formed at a position far away from the base terminal, and the voltage at which the bypass diode breaks down when electrostatic discharge is applied is as follows: (Series resistance of bypass diode) x (discharge current) ) has the advantage of being as high as the

〔発明の効果〕〔Effect of the invention〕

以上説明した工すに、本発明は抵抗内蔵構造のトランジ
スタのベース直列抵抗のベース端子端を、ベース層と同
じ極性のバイパスダイオードに接続することにエフ、従
来構造ではベース直列抵抗を構成する多結晶シリコンの
ベース端子側端と酸化膜を挾んで対向しているコレクタ
層の間に、静電気放電にLる電位差が印加され絶縁破壊
する個所が、バイパスダイオードにより、破壊電圧工り
As described above, the present invention is effective in connecting the base terminal end of the base series resistor of a transistor with a built-in resistor structure to a bypass diode having the same polarity as the base layer. A bypass diode is used to reduce the breakdown voltage at the point where dielectric breakdown occurs when a potential difference of L is applied to electrostatic discharge between the base terminal side end of the crystalline silicon and the collector layer facing each other with the oxide film in between.

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

第1図は、本発明の一実施例を示すもので、同図(aJ
は断面図、同図(b)は等価回路、第2図は本発明の他
の実施例を示すもので、同図(a)は断面図、同図(b
)は同図(a)のX−X’線で切断した断面図、第3図
は従来の半導体装置を示すもので、同図(a)は断面図
、同図(tlは等何回路である。 1・・・コレクタ基板、2・・・コレクタ高抵抗層、3
・・・ベース層、4・・・エミツタ層、5・・・ダイオ
ードを構成するベースと同極性の層、6・・・酸化膜、
7・・・ベース直列抵抗、8・・・ベース・エミッタ間
並列抵抗、9・・・金属配線、10・・・ベース端子、
11・・・エミッタ端子、12・・・コレクタ電極金属
、13・・・抵抗、14・・・コンタクト 代理人 弁理士  内 原   晋 (し〕 筋1図 X′ (b)   +の図11X−X’と1庸を方向n新6I
ia箭Z図 rl、ノ 9f53図
FIG. 1 shows an embodiment of the present invention.
is a sectional view, FIG. 2(b) is an equivalent circuit, and FIG. 2 shows another embodiment of the present invention. FIG.
) is a cross-sectional view taken along the line X-X' in Figure (a), and Figure 3 shows a conventional semiconductor device; 1... Collector substrate, 2... Collector high resistance layer, 3
... base layer, 4... emitter layer, 5... layer having the same polarity as the base constituting the diode, 6... oxide film,
7... Base series resistance, 8... Base-emitter parallel resistance, 9... Metal wiring, 10... Base terminal,
11...Emitter terminal, 12...Collector electrode metal, 13...Resistor, 14...Contact agent Susumu Uchihara, patent attorney Figure 1 X' (b) + Figure 11X-X ' and one direction n new 6I
ia Z diagram RL, ノ9f53 diagram

Claims (1)

【特許請求の範囲】[Claims] コレクタ領域にベース領域とエミッタ領域が形成され、
表面に絶縁膜と電極配線を有するトランジスタにおいて
、前記酸化膜上に形成された多結晶シリコンでベース電
極取出し端子と前記ベース領域との間の直列抵抗及び前
記ベース領域と前記エミッタ領域との間の並列抵抗を形
成し、前記直列抵抗の前記ベース電極取出し端子側端が
、前記コレクタ領域内に形成されたダイオード領域に接
続されていることを特徴とする半導体装置。
A base region and an emitter region are formed in the collector region,
In a transistor having an insulating film and electrode wiring on its surface, polycrystalline silicon formed on the oxide film reduces the series resistance between the base electrode lead terminal and the base region and the resistance between the base region and the emitter region. 1. A semiconductor device, wherein a parallel resistor is formed, and an end of the series resistor on the base electrode extraction terminal side is connected to a diode region formed in the collector region.
JP17600986A 1986-07-25 1986-07-25 Manufacture of semiconductor device Pending JPS6332965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17600986A JPS6332965A (en) 1986-07-25 1986-07-25 Manufacture of semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17600986A JPS6332965A (en) 1986-07-25 1986-07-25 Manufacture of semiconductor device

Publications (1)

Publication Number Publication Date
JPS6332965A true JPS6332965A (en) 1988-02-12

Family

ID=16006121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17600986A Pending JPS6332965A (en) 1986-07-25 1986-07-25 Manufacture of semiconductor device

Country Status (1)

Country Link
JP (1) JPS6332965A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006108543A (en) * 2004-10-08 2006-04-20 Matsushita Electric Ind Co Ltd Semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006108543A (en) * 2004-10-08 2006-04-20 Matsushita Electric Ind Co Ltd Semiconductor device

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