JPS58199563A - Transistor with damper diode - Google Patents

Transistor with damper diode

Info

Publication number
JPS58199563A
JPS58199563A JP8351082A JP8351082A JPS58199563A JP S58199563 A JPS58199563 A JP S58199563A JP 8351082 A JP8351082 A JP 8351082A JP 8351082 A JP8351082 A JP 8351082A JP S58199563 A JPS58199563 A JP S58199563A
Authority
JP
Japan
Prior art keywords
region
emitter
base
transistor
exposed
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
JP8351082A
Other languages
Japanese (ja)
Other versions
JPH0228895B2 (en
Inventor
Tadahiko Tanaka
田中 忠彦
Norihiro Shigeta
重田 典博
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Sanyo Denki 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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP8351082A priority Critical patent/JPS58199563A/en
Publication of JPS58199563A publication Critical patent/JPS58199563A/en
Publication of JPH0228895B2 publication Critical patent/JPH0228895B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/70Bipolar devices
    • H01L29/72Transistor-type devices, i.e. able to continuously respond to applied control signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Bipolar Integrated Circuits (AREA)
  • Electrodes Of Semiconductors (AREA)
  • Bipolar Transistors (AREA)
  • Semiconductor Integrated Circuits (AREA)

Abstract

PURPOSE:To perform a thermal balance without decreasing the hFE of a transistor by forming a plurality of small bore bases of ultrafine area on the surface of an emitter region. CONSTITUTION:An emitter region 12 formed in a base region 11 is formed in a mesh shape, a base region 11 is exposed at the mesh 16, the base 12 of each mesh 16 is connected to a pectinated base electrode 13. On the other hand, the region 12 is connected to a pectinated emitter electrodes 14 which is extended on the surface. Many small circular bore base exposed parts 15 which are extended from the interior of the region 11 through the region 12 are formed. The exposed parts 15 are formed on the region 12 of the part corresponding to the crossing parts of the mesh, and when the region 12 is diffused, the mesh 16 part and the exposed parts 15 are allowed to remain and formed. The parts 15 exposed on the surface are connected to emitter electrode 14 together with the region 12.

Description

【発明の詳細な説明】 本発明はコレクターエミッタ間にダンパーダイオードの
形成されたトランジスタに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transistor in which a damper diode is formed between collector and emitter.

一般に、誘導性負荷を駆動するトランジスタに於いて、
トランジスタがオン状態からオフ状態となるとき、誘導
性負荷に生じる逆起電力によって、トランジスタのコレ
クターエミッタ間に高電圧が印加され、トランジスタが
破壊されることがあった。この破壊を防止するために、
コレクターベース間にダンパーダイオードを形成し、逆
起電力による電流をバイパスする方法がある。
Generally, in a transistor that drives an inductive load,
When a transistor changes from an on state to an off state, a high voltage is applied between the collector and emitter of the transistor due to a back electromotive force generated in an inductive load, which may destroy the transistor. To prevent this destruction,
There is a method of forming a damper diode between the collector base and bypassing the current caused by the back electromotive force.

従来のダンパーダイオード付トランジスタは、第1図の
如く構成されている。第1図に示されたトランジスタは
、NPN型トランジスタであり、N型コレクタ領域(1
)内KP型のペース領域(2)が形成6れ、ペース領域
(2)内KN型のエミッタ領域(3)が形成される。そ
して、エミッタ領域(3)内には、その表面にP型のペ
ース領域(2)が延在するダンパーダイオード部(4〕
が形成きれる。このダンパーダイオード部(4)はエミ
ッタ領域(3)1’拡散によって形成する際に、ダンパ
ーダイオード部(4)のみを残すことによって形成δれ
る。第2図は第1図に示された平面図のA−A’断面図
であり、エミッタ領域(3)内の表面に延在されたペー
ス領域(2j1即ち、ダンパーダイオード部(4)は、
エミッタ領域(3)上に形成きれるエミッタ電tik 
(5)に接続される。従って接続上はベースがエミッタ
に接続された形となるが、ベース饋* (2)上に設け
られるベース電極(6)とエミッタ電極(5)との間に
は、ベース領域(2)の内部抵抗RBt:が存在し、ま
た、コレクターエミッタ間にはコレクタ領域(11とベ
ースW4域(2)とで形成されるPN接合(7)が存在
することになる。このPN接合171がダンパーダイオ
ードとして働く。第6図は第1図及び第2図に示された
トランジスタの等価回路図であシ、トランジスタ18)
のベース−エミッタ間には、ベースff4域(2)内の
内部抵抗RBKが接続され、コレクターエミッタ間には
PN接合(7)によって形成きれるダンパーダイオード
+9Jが接続きれる。従って、コレクターエミッタ間に
印加される逆電圧によりでダンパー電流は、ダンパーダ
イオード(9)を介して流れる。即ち、第2図によれば
、エミッタ電極(5)からダンパーダイオード部(4)
のベース領域(2)を介し、PN接合(7)を介してコ
レクタ領域(1)にダンパー電流が流れるのである。
A conventional transistor with a damper diode is constructed as shown in FIG. The transistor shown in FIG. 1 is an NPN type transistor, and has an N type collector region (1
) A KP-type pace region (2) is formed 6, and a KN-type emitter region (3) is formed within the pace region (2). In the emitter region (3), there is a damper diode section (4) on the surface of which a P-type pace region (2) extends.
can be formed. This damper diode part (4) is formed by leaving only the damper diode part (4) when forming the emitter region (3) 1' by diffusion. FIG. 2 is a sectional view taken along the line AA' of the plan view shown in FIG.
Emitter voltage tik formed on emitter region (3)
(5). Therefore, in terms of connection, the base is connected to the emitter, but there is a gap inside the base region (2) between the base electrode (6) and the emitter electrode (5) provided on the base electrode (2). A resistor RBt: exists, and a PN junction (7) formed by the collector region (11) and the base W4 region (2) exists between the collector and emitter.This PN junction 171 acts as a damper diode. Figure 6 is an equivalent circuit diagram of the transistor shown in Figures 1 and 2, transistor 18).
An internal resistor RBK in the base ff4 region (2) is connected between the base and emitter of , and a damper diode +9J formed by a PN junction (7) is connected between the collector and emitter. Therefore, the damper current flows through the damper diode (9) due to the reverse voltage applied between the collector and emitter. That is, according to FIG. 2, from the emitter electrode (5) to the damper diode section (4)
A damper current flows through the base region (2) of the transistor and the collector region (1) through the PN junction (7).

ところが、第2図の断面図から明らかな様に、エミッタ
@域(3)内に形成するダンパーダイオード部(4)を
ペース電極16)に近づけると内部抵抗RBIが減少し
、トランジスタのhrxが小δくなコてしまうので、で
きるだけペース電極(6)から離式なければならない。
However, as is clear from the cross-sectional view in FIG. 2, when the damper diode section (4) formed in the emitter@region (3) is brought closer to the pace electrode 16), the internal resistance RBI decreases, and the hrx of the transistor decreases. Since δ is lost, it is necessary to separate it from the pace electrode (6) as much as possible.

しかし、エミッタ伯域(3Jの形状や周辺長の制約によ
り制限され、また、ダンパーダイオード部(4)の表面
債をあまシ小さくすると電流容置が小さくなりダンパー
ダイオードとしての働きをしなくなる。更にダンパー電
流によって、ダンパーダイオード部(4)に最も近いP
N接合(7)部分のみが発熱し、トランジスタの熱バラ
ンスがくずれる不都合があった。
However, it is limited by the shape and peripheral length of the emitter area (3J), and if the surface bond of the damper diode section (4) is made slightly smaller, the current capacity becomes smaller and it no longer functions as a damper diode. Depending on the damper current, P closest to the damper diode section (4)
Only the N-junction (7) portion generates heat, causing the inconvenience that the thermal balance of the transistor is disrupted.

本発明は上述した点に鑑みて為δれたものであυ、エミ
ッタ領域の表面に微少面積の小口径ベース露出部を複数
個設けることにより、従来の欠点を除去したダンパーダ
イオード付トランジスタを提供するものである。以下図
面を参照して本発明の詳細な説FJITる。
The present invention has been devised in view of the above-mentioned points, and provides a damper diode-equipped transistor that eliminates the conventional drawbacks by providing a plurality of small-area, small-diameter exposed base portions on the surface of the emitter region. It is something to do. A detailed description of the present invention will be given below with reference to the drawings.

第4図は本発明の実施例を示す平面図であり、網状のエ
ミッタを採用したNPN型トランジスタである。ill
はN型のコレクタ領域、αυはコレクタ領域11(l内
にP型不純物を拡散して形成したベースff4域、Oa
はペース頌域aυ内にN型不純物を画濃度に拡散して形
成したエミッタ領域、 (131(141は櫛型に形成
されたペース電極及びエミッタ電極、任9はダンパーダ
イオードを形成する小口径ベース露出部である。
FIG. 4 is a plan view showing an embodiment of the present invention, which is an NPN type transistor employing a net-shaped emitter. ill
is the N-type collector region, αυ is the base ff4 region formed by diffusing P-type impurities in the collector region 11 (l, Oa
is an emitter region formed by diffusing N-type impurities to an image density within the pace area aυ, (131 (141 is a comb-shaped pace electrode and emitter electrode, and 9 is a small diameter base forming a damper diode) This is an exposed part.

ベース領域aυ内に形成されたエミッタ領域u21は、
網状に形成され、その網目0(口にはベース領域111
1が露出し、各網目正のベース領域a4は櫛型のペース
電極03に接続される。一方、エミッタ領域0りはその
表面に延在された櫛型のエミッタ電極Iと接続される。
The emitter region u21 formed within the base region aυ is
It is formed into a net shape, and its mesh 0 (the mouth has a base area 111
1 is exposed, and each mesh base region a4 is connected to a comb-shaped pace electrode 03. On the other hand, the emitter region 0 is connected to a comb-shaped emitter electrode I extending on its surface.

また、エミッタ領域u内には網目fI6iVc露出する
ペース囲域α1)の他に、エミッタ領域(12を貫通し
てベースa域旧)内部から延在さtした円形の小口径ペ
ース露出部0jが多数形成される。この小口径ベース露
出部ItSは網のり叉部に相当する部分のエミッタ頭載
11湯に設けられ、エミッタ領域0aを拡散する際に、
網目061部分と小口径ペース露出部(151を残すこ
とによって形成ざね、る。そして、表面vc露出した小
口径ベース部a9は、エミッタ@域03と共にエミッタ
電極Iと接続される。
In addition, in the emitter region u, in addition to the pace surrounding area α1) where the mesh fI6iVc is exposed, there is a circular small-diameter pace exposed portion 0j extending from the inside of the emitter region (through the base a region 12). Formed in large numbers. This small-diameter base exposed part ItS is provided on the emitter head mount 11 in a part corresponding to the mesh glue part, and when diffusing the emitter region 0a,
It is formed by leaving the mesh 061 portion and the small diameter pace exposed portion (151).The small diameter base portion a9 exposed on the surface VC is connected to the emitter electrode I together with the emitter region 03.

第5図は第4図に示された平面図のB−8’断面図であ
り、同一部分には同一図番を用いている。
FIG. 5 is a sectional view taken along line B-8' of the plan view shown in FIG. 4, and the same numbers are used for the same parts.

ペース電極Q3)及びエミッタ電極Iは、酸化膜αη上
に設けられ、その酸化膜σηの除去された部分に於いて
、各対応Tるa城と接続が為される。小口径ベース露出
部a51はベース領域αυの下部分からエミッタ領域O
3を貫通して表面に延在され、その断面積は約100μ
−から1000μ−程度の微少面積に形成される。そし
て、エミッタ電極Iに接続されることによシ、構成上ベ
ースとエミッタとが接続された形となるが、小口径ペー
ス露出部151からベース頭域住υ内部に至る抵抗は、
非常に高抵抗となり、ペース−エミッタ間には複数の小
口径ベース露出部[15+の高抵抗が並列接続されたも
のとなり、その合成抵抗RBIC第6図等価回路参照)
は比較的高抵抗となり、トランジスタのhrgは低下し
ない。エミッタ電極Iとコレクタ領域1lO1との間1
こは、小口径ペース露出部(151がエミッタ電極(1
4)に接続されることによシ、PN接合08が存在し、
コレクタ領域111tカソード、ベース領域圓をアノー
ドとするダンパーダイオードが形成される。従りて、コ
レクタよシも高い電圧がエミッタに品加纒れると、ダン
パー電流は、エミッタ電極(14)から各小口径ベース
露出部a5及びPN接合(+81を介してコレクタ領v
C叩に流れる。
The pace electrode Q3) and the emitter electrode I are provided on the oxide film αη, and are connected to the respective corresponding electrodes T and a in the portion where the oxide film ση is removed. The small diameter base exposed portion a51 extends from the lower part of the base region αυ to the emitter region O.
3 and extends to the surface, its cross-sectional area is approximately 100μ
It is formed in a minute area of about - to 1000μ-. By being connected to the emitter electrode I, the base and emitter are connected in terms of structure, but the resistance from the small diameter pace exposed part 151 to the inside of the base head area is,
The resistance becomes extremely high, and between the pace and the emitter there are multiple exposed small-diameter base parts [15+ high resistances are connected in parallel, and the combined resistance RBIC (see equivalent circuit in Figure 6)]
becomes a relatively high resistance, and the hrg of the transistor does not decrease. Between emitter electrode I and collector region 1lO1
This is the small diameter pace exposed part (151 is the emitter electrode (1
4), a PN junction 08 exists,
A damper diode is formed with the collector region 111t as a cathode and the base region as an anode. Therefore, when a high voltage is applied to the emitter as well as the collector, the damper current flows from the emitter electrode (14) to the collector region v via each small diameter base exposed portion a5 and the PN junction (+81).
It flows to the C hit.

また、第4図及び第5図に於いて、小口径ベース露出部
(15は、工iツタ電極α尋のポンディングパッド部Q
l近傍には形成されていない。これは、エミッタ電ti
u4の抵抗成分により、エミッタ電極(14)の先端部
よりも、ボンディングバット部σ)近傍のエミッタ領域
a’arc流れるエミッタ電流の方が大きくなり、発装
置が大きくかうている。そこで、熱的バランスを取るた
めに、エミッタ電極Iの先端近傍にのみ小口径ペース露
出部a5を形成し、ダンパー電流による発熱によって、
熱的バランスがくずれない様にしているのである。
In addition, in FIGS. 4 and 5, the small diameter base exposed portion (15 is the bonding pad portion Q of the ivy electrode α fathom).
It is not formed near l. This is the emitter voltage ti
Due to the resistance component of u4, the emitter current flowing through the emitter region a'arc near the bonding butt portion σ) is larger than that at the tip of the emitter electrode (14), and the emitter is greatly affected. Therefore, in order to maintain thermal balance, a small-diameter space exposed portion a5 is formed only near the tip of the emitter electrode I, and heat generated by the damper current causes
This prevents the thermal balance from being upset.

この様に、ダンパーダイオードはエミッタn域1り内に
小口径ペース露出部115+を多数形成Tることにより
て形成され、また小口径であるが由に、配置の自由度が
大きく、更に内部抵抗を高抵抗とすることができるので
並列接続された場合でも、ペース−エミッタ間に接続さ
れる抵抗RBEを比較的高くすることが可能で、トラン
ジスタのhrgを低下させるこ、となく、また熱的バラ
ンスも取ることができるのである。
In this way, the damper diode is formed by forming a large number of small-diameter exposed portions 115+ within the emitter n region, and because of its small diameter, there is a large degree of freedom in arrangement, and the internal resistance can be made to have a high resistance, so even when connected in parallel, it is possible to make the resistance RBE connected between the pace and emitter relatively high, without reducing the hrg of the transistor, and without reducing the thermal You can also find a balance.

向、本実施例では網状のエミッタを用いたトランジスタ
について説明したが、第1図に示δれた工tツタ形状の
トランジスタにも実施可能であシ、この場合も同様に、
エミッタ領域内の先端部分、即ち、ポンディングパッド
部分から離れた所に小口径ベース露出部を複数個形成す
る。
Although this embodiment has described a transistor using a net-shaped emitter, it can also be implemented with a vine-shaped transistor shown in FIG.
A plurality of small-diameter exposed base portions are formed at the tip portion within the emitter region, that is, at a location away from the bonding pad portion.

上述の如く、不発13AKよね、ば、ダンパーダイオー
ドの設計自由度が大きくなり、最適な設計が可能となシ
、トランジスタのhrm及び熱的バランスに何利と々る
As mentioned above, the degree of freedom in designing the damper diode is increased, and an optimal design is possible, which is beneficial for the hrm and thermal balance of the transistor.

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

第1図は従来例を示す平面図、第2図は第1図のA−A
’断面図、第6図は等価回路図、第4図は本発明の実施
例を示す平面図、第5図は第4図に示された平面図のB
−8’断面図である。 11ト・・コレクタ頭載、συ・・・ペース領域、σa
・・・エミッタ領域、(131・・・ペース電極、■・
・・エミッタ電極、[19・・・小口径ベース露出部、
1t61・・・網目、 (171・・・酸化膜、餞、・
、PN接合、α9・・・ポンディングパッド部口=29
Figure 1 is a plan view showing a conventional example, and Figure 2 is A-A in Figure 1.
6 is an equivalent circuit diagram, FIG. 4 is a plan view showing an embodiment of the present invention, and FIG. 5 is a B of the plan view shown in FIG. 4.
-8' sectional view. 11t...Collector head, συ...Pace area, σa
... Emitter region, (131... Pace electrode, ■
...Emitter electrode, [19...Small diameter base exposed part,
1t61...Mesh, (171...Oxide film, paste,...
, PN junction, α9...Ponding pad opening = 29
death

Claims (1)

【特許請求の範囲】[Claims] t コレクタ領域と、該コレクタ領域内に形成されたベ
ース領域と、該ペース領域内に形成されたエミッタ餠域
とを備え、前記エミッタ領域を貫通し、その表面に前記
ペース領域の一部を微少断面積を有して延在した小口径
ペース露出部を複数個前記エミッタ領域内に形成し、前
記エミッタ領域と共に前記小口径ペース露出部をエミッ
タ電極に接続することにより、前記コレクターベース接
合の一部がダンパーダイオードとなることを特徴とする
ダンパーダイオード付トランジスタ。
t comprises a collector region, a base region formed in the collector region, and an emitter region formed in the paste region, penetrating the emitter region and depositing a part of the paste region on the surface thereof. By forming a plurality of small-diameter exposed portions having a cross-sectional area and extending in the emitter region, and connecting the small-diameter exposed portions together with the emitter region to the emitter electrode, one of the collector base junctions is formed. A transistor with a damper diode, characterized in that a portion thereof serves as a damper diode.
JP8351082A 1982-05-17 1982-05-17 Transistor with damper diode Granted JPS58199563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8351082A JPS58199563A (en) 1982-05-17 1982-05-17 Transistor with damper diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8351082A JPS58199563A (en) 1982-05-17 1982-05-17 Transistor with damper diode

Publications (2)

Publication Number Publication Date
JPS58199563A true JPS58199563A (en) 1983-11-19
JPH0228895B2 JPH0228895B2 (en) 1990-06-27

Family

ID=13804476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8351082A Granted JPS58199563A (en) 1982-05-17 1982-05-17 Transistor with damper diode

Country Status (1)

Country Link
JP (1) JPS58199563A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008124671A1 (en) * 2007-04-09 2008-10-16 Analog Devices, Inc. Robust esd cell

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS538570A (en) * 1976-07-12 1978-01-26 Nec Corp Semiconductor device
JPS5375762A (en) * 1976-12-16 1978-07-05 Fuji Electric Co Ltd Semiconductor device
JPS57208170A (en) * 1981-06-17 1982-12-21 Nec Corp Composite transistor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS538570A (en) * 1976-07-12 1978-01-26 Nec Corp Semiconductor device
JPS5375762A (en) * 1976-12-16 1978-07-05 Fuji Electric Co Ltd Semiconductor device
JPS57208170A (en) * 1981-06-17 1982-12-21 Nec Corp Composite transistor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008124671A1 (en) * 2007-04-09 2008-10-16 Analog Devices, Inc. Robust esd cell
US7656009B2 (en) 2007-04-09 2010-02-02 Analog Devices, Inc. Robust ESD cell

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JPH0228895B2 (en) 1990-06-27

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