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JPH029160A - Semiconductor device - Google Patents

Semiconductor device

Info

Publication number
JPH029160A
JPH029160A JP63158174A JP15817488A JPH029160A JP H029160 A JPH029160 A JP H029160A JP 63158174 A JP63158174 A JP 63158174A JP 15817488 A JP15817488 A JP 15817488A JP H029160 A JPH029160 A JP H029160A
Authority
JP
Japan
Prior art keywords
resistance
electrodes
value
ratio
processed groove
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
JP63158174A
Other languages
Japanese (ja)
Inventor
Kaoru Imamura
今村 薫
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP63158174A priority Critical patent/JPH029160A/en
Publication of JPH029160A publication Critical patent/JPH029160A/en
Pending 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
    • H10D84/201Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of only components covered by H10D1/00 or H10D8/00, e.g. RLC circuits
    • H10D84/204Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of only components covered by H10D1/00 or H10D8/00, e.g. RLC circuits of combinations of diodes or capacitors or resistors
    • H10D84/209Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of only components covered by H10D1/00 or H10D8/00, e.g. RLC circuits of combinations of diodes or capacitors or resistors of only resistors

Landscapes

  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Semiconductor Integrated Circuits (AREA)

Abstract

PURPOSE:To increase and decrease dividing resistance ratio by disposing the third electrode at a part of a resistance layer between the first and second electrodes and forming a processed groove in the resistance layer. CONSTITUTION:A processed groove which is provided for the purpose of adjusting the ratio a resistance R1 between electrodes 12 and 14 to a resistance R2 between the electrodes 13 and 14 is formed at a recessed part of a resistance layer 11 through a functional laser trimming process. The initial value of a resistance ratio which is determined before forming the processed groove 3 is one in the resistance layer 11. When the processed groove only for a length W is formed, the resistance ratio varies up to 1.6 at an actual measurement value. Then the resistance value is adjusted by making the length W of the processed groove 3 vary. A resistance which can be trimmed thus makes it possible to increase and decrease the resistance value.

Description

【発明の詳細な説明】 〔発明の目的〕 (産業上の利用分野) 本発明は半導体装置に係シ、特に半導体集積回路内など
に使用される高精度の分割抵抗比を有する抵抗に関する
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a semiconductor device, and particularly to a resistor having a highly accurate dividing resistance ratio used in a semiconductor integrated circuit.

(従来技術) 直列制御型定電圧回路は常に一定の出力電圧を得るため
に用いられ、−例として第4図に示した構成のものが用
いられている。この回路はトランジスタTr1. Tr
2.ツェナーダイオードDz及び抵抗R1,R2を組込
んで構成されておシ、入力端子A、B間に入力電圧VI
Nが印加されると、トランジスタTr2の順方向ペース
−エミッタ間の電圧Vswと、ツェナーダイオードDz
の逆方向ドロップ電圧Vzとの和が0点に現われる。そ
してD点での出力電圧’Youtは0点での電圧と抵抗
R1,R2の比とによって決定され、Vout = (
Vz −1−VB璽)・抗R1とR2の比というのは出
力電圧Voutを決定する重要因子である。
(Prior Art) A series control type constant voltage circuit is used to always obtain a constant output voltage, and as an example, one having the configuration shown in FIG. 4 is used. This circuit consists of transistors Tr1. Tr
2. It is constructed by incorporating a Zener diode Dz and resistors R1 and R2, and the input voltage VI is applied between input terminals A and B.
When N is applied, the voltage Vsw between the forward pace and the emitter of the transistor Tr2 and the Zener diode Dz
The sum of Vz and reverse drop voltage Vz appears at the 0 point. The output voltage 'Yout at point D is determined by the voltage at point 0 and the ratio of resistors R1 and R2, and Vout = (
Vz -1-VB) The ratio of resistors R1 and R2 is an important factor in determining the output voltage Vout.

従って、抵抗R1,R2をトリミングすることによって
分割抵抗比R1/R2を所定の値に合せ込むことが一般
的に行なわれる。
Therefore, it is common practice to adjust the divided resistance ratio R1/R2 to a predetermined value by trimming the resistors R1 and R2.

第5図(a)は第4図に記載の抵抗R1側にトリミング
抵抗R:を設けた一例である。トリミングを行う事で抵
抗値は増加する。従って、例えばトリミングを行う前の
出力電圧が±2vばらつく出力電圧を10v±0.5V
以内に設定する場合、出力電圧のばらつきの最大値が1
0.5Vを上回らない様にR1゜几;、R2を設計し、
出力電圧を測定しながらR1をトリミングし所定の出力
電圧に設定していく。この場合出力電圧の初期値は8.
5±2vである。一方、第4図(b)は、R1は一定値
としてRt、側にトリミング抵抗R;を設けた例で、出
力電圧の初期値は11.5±2vに設定し、R二をトリ
ミングする事で所定の出力電圧を得る。第4図(C)は
R1,R2側方にトリミング抵抗を設けたもので、出力
電圧の初期値は10±2■となる様設計し、初期値が目
標値以下の時はR:を又目標値以上の時は几;をトリミ
ングする。
FIG. 5(a) is an example in which a trimming resistor R: is provided on the resistor R1 side shown in FIG. The resistance value increases by trimming. Therefore, for example, if the output voltage before trimming fluctuates by ±2V,
When setting within 1, the maximum value of output voltage variation is 1
Design R1° and R2 so that they do not exceed 0.5V,
While measuring the output voltage, R1 is trimmed and set to a predetermined output voltage. In this case, the initial value of the output voltage is 8.
It is 5±2v. On the other hand, Fig. 4(b) shows an example in which R1 is set to a constant value and a trimming resistor R is provided on the Rt side.The initial value of the output voltage is set to 11.5±2v, and R2 is trimmed. to obtain the specified output voltage. Figure 4 (C) shows a device with trimming resistors provided on the sides of R1 and R2, designed so that the initial value of the output voltage is 10±2■, and when the initial value is less than the target value, R: is When the value exceeds the target value, trim the value.

トリミングの手段としては、抵抗層にファンクシヲナル
レーザトリミング又はファンクシ薗ナルサンドブラスト
トリミングによシ抵抗層に加工溝を入れて抵抗値の微調
整を行うのが主流である。
The mainstream trimming method is to finely adjust the resistance value by cutting grooves in the resistance layer by functional laser trimming or functional sandblast trimming.

第6図(a)、(b)はトリミング抵抗層(1)にトリ
ミングをほどこした状態を示したものである。抵抗層(
1)にトリミングによりて加工溝(3)を形成し、電極
(2)と(2′)間の電気力線の向きを変えていく事で
所定の抵抗値に設定する事が出来る。
FIGS. 6(a) and 6(b) show a state in which the trimming resistance layer (1) has been trimmed. Resistance layer (
A predetermined resistance value can be set by forming a processed groove (3) in 1) by trimming and changing the direction of the lines of electric force between the electrodes (2) and (2').

(発明が解決しようとする課題) しかしながら、前記のように抵抗R1,R2の抵抗比を
正確に定めるためには、抵抗R1,R,を形成する他に
微調整用抵抗R:またはR;を余分に形成する必要があ
ったため、抵抗領域の占有面積の増加になシ、半導体チ
ップ内の集積化のさまたげになるという欠点があった。
(Problem to be Solved by the Invention) However, in order to accurately determine the resistance ratio of the resistors R1 and R2 as described above, in addition to forming the resistors R1 and R, a fine adjustment resistor R: or R; Since it is necessary to form an extra resistor region, there is a drawback that the area occupied by the resistor region increases and integration within the semiconductor chip is hindered.

本発明の目的は実質的面積を低減できて、抵抗比の設定
の精度がよい抵抗層を備えた半導体装置を提供するとこ
ろにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a semiconductor device having a resistive layer whose area can be reduced substantially and whose resistance ratio can be set accurately.

〔発明の構成〕[Structure of the invention]

(課題を解決するための手段) 本発明では、基板上で離間して配置されている第1およ
び第2の電極間にトリミングが可能な抵抗層が配置され
ておシ、そしてこの抵抗層の中間には第3の電極が接続
されている。そして前記抵抗層に第1電極から第2電極
の向きまたは第2電極から第1!極の向きに加工溝を設
けて第1−第3電極間の抵抗値と第2−第3電極間の抵
抗値との比率を決定する。
(Means for Solving the Problems) In the present invention, a resistive layer that can be trimmed is disposed between first and second electrodes that are spaced apart on a substrate, and the resistive layer is A third electrode is connected in the middle. Then, the direction from the first electrode to the second electrode or from the second electrode to the first! Machining grooves are provided in the direction of the poles to determine the ratio between the resistance value between the first and third electrodes and the resistance value between the second and third electrodes.

(作用) 以上のように第1.第2電極間の抵抗層の一部に第3の
電極を配置した構成にすると、前記抵抗層に加工溝を入
れることによって分割抵抗比率の増加と減少が可能であ
り、容易に行なうことができる。そして、前記抵抗層に
直接トリミングを施こすため、微調整用の抵抗を他に設
ける必要がなくなる。
(Effect) As mentioned above, the first. If the third electrode is arranged in a part of the resistance layer between the second electrodes, it is possible to increase or decrease the dividing resistance ratio by cutting grooves in the resistance layer, and this can be easily done. . Since the resistor layer is directly trimmed, there is no need to provide another resistor for fine adjustment.

(実施例) 第1図は本発明の一実施例を示す抵抗層および電極の平
面図であシ、この図における電極(14)。
(Example) FIG. 1 is a plan view of a resistance layer and an electrode showing an example of the present invention, and an electrode (14) in this figure.

(12)、 (13)はそれぞれ第4図におけるC、 
D、 Il:iの電極に対応したものである。また第4
図に示す抵抗R,,R2は本実施例では連続した形状の
抵抗層(11)で表わされており、その断面図を同図(
11)に示す。抵抗層(11)は第1図(11)に示す
ように、シリコン基板(16)上にシリコン酸化膜(1
5)を介して形成されておシ、ポリシリコン層をバター
ニングシテ連続した形状に形成され、電極(14)に接
続された凸部を有する。
(12) and (13) are C in Figure 4, respectively.
D, Il:corresponds to the i electrode. Also the fourth
The resistors R, , R2 shown in the figure are represented by a continuous resistance layer (11) in this embodiment, and a cross-sectional view of the resistor layer (11) is shown in the figure (
11). As shown in FIG. 1 (11), the resistance layer (11) is a silicon oxide film (11) formed on a silicon substrate (16).
5) is formed by patterning the polysilicon layer into a continuous shape, and has a convex portion connected to the electrode (14).

そして電極(12)、 (14)間の抵抗R0と電極(
13) 。
And the resistance R0 between the electrodes (12) and (14) and the electrode (
13).

(14)間の抵抗R2の比を調整するための加工溝(3
)は抵抗層(11)の凸部に7アンクシ冒ナルレーザー
トリミング法または7アンクシ1ナルサンドブラストト
リミング法によシ形成されたものである。
(14) Machining groove (3) for adjusting the ratio of resistance R2 between
) is formed on the convex portion of the resistive layer (11) by a 7-angle laser trimming method or a 7-angle sandblast trimming method.

第1図(1)の抵抗層(11)において、加工溝(3)
形成前の抵抗比の初期値はR1/R,:1である。一方
、長さω分だけ加工溝(3)を形成した場合、本実施例
の実測値で約R1/R2= 1.6まで変化している。
In the resistance layer (11) in Fig. 1 (1), the processed groove (3)
The initial value of the resistance ratio before formation is R1/R, :1. On the other hand, when the processed groove (3) is formed by the length ω, the actual measured value of this example changes to about R1/R2=1.6.

また、加工溝の形成を電極13から12の向きで第1図
(1)と同等にω分野りた場合はR1/R2=1からR
1/R,= 0.61で変化している。そして、前記加
工溝の長さωを変化させることによシ、R1/R2の値
を調整することができる。以上の様に本発明は1つのト
リミング可能な抵抗により分割抵抗比率R,/R,の増
加と減少が可能になっている。
In addition, if the processing groove is formed in the direction of electrodes 13 to 12 in the ω field in the same manner as in Fig. 1 (1), then R1/R2 = 1 to R
It changes by 1/R, = 0.61. By changing the length ω of the machined groove, the value of R1/R2 can be adjusted. As described above, in the present invention, it is possible to increase and decrease the dividing resistance ratio R, /R, using one trimmable resistor.

第2図および第3図は本発明の他の実施例を示すもので
ある。第2図における抵抗層(11)は前記第1の実施
例よシも凸部の幅が広くなっておシ抵抗幅ωに対し6ω
である。また、加工溝は5ω分形成されている。このよ
うに凸部の幅を6ωにした場合、分割抵抗比R1/R2
は、加工溝(3)の形成前は実測値で0.2であシ長さ
5ωの加工溝を形成した時には4にであった。よって加
工溝の長さを変化させることによυ分割抵抗比R,/R
2は0.2〜4の範囲で設定することができる。
FIGS. 2 and 3 show other embodiments of the invention. In the resistance layer (11) in FIG. 2, the width of the convex portion is wider than in the first embodiment, and the resistance width ω is 6ω.
It is. Further, the processed groove is formed by 5ω. When the width of the convex portion is set to 6ω in this way, the dividing resistance ratio R1/R2
The measured value was 0.2 before forming the processed groove (3), and was 4 when the processed groove with a length of 5ω was formed. Therefore, by changing the length of the machined groove, the υ division resistance ratio R, /R
2 can be set in the range of 0.2 to 4.

また第3図のように抵抗層(11)の凸部を長くするこ
とにより加工溝(3)の長さに対する分割抵抗比の変動
は小さくなシ、よシ分割抵抗比の設定においては微調整
が可能になる。
In addition, as shown in Figure 3, by lengthening the convex portion of the resistance layer (11), the variation in the dividing resistance ratio with respect to the length of the processed groove (3) is small. becomes possible.

本実施例においては抵抗層(11)に凸部を設けそこに
第3の電極を接続しているが、凸部を設けずに第3の電
極を抵抗層(11)に接続したものであってもよい。
In this example, a convex portion is provided on the resistance layer (11) and the third electrode is connected thereto, but it is possible to connect the third electrode to the resistive layer (11) without providing a convex portion. You can.

〔発明の効果〕〔Effect of the invention〕

以上詳述したように本発明では、半導体装置内の出力を
決定するために用いられ、相互に所定の抵抗比をもつこ
とが要求される少なくとも2つの抵抗において、実質的
面積を低減できてその抵抗の比を精度よく設定すること
ができる。
As detailed above, the present invention can reduce the substantial area of at least two resistors that are used to determine the output in a semiconductor device and are required to have a predetermined resistance ratio to each other. The resistance ratio can be set accurately.

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

第1図(1)は本発明の一実施例を示す抵抗層および電
極の平面図、同図(11)はそのA−A’線に沿う断面
図、第2図は本発明の第2の実施例を示す抵抗層および
電極の平面図、第3図は本発明の第3の実施例を示す抵
抗層および電極の平面図、第4図は一般的な直列制御量
定電圧回路を示す回路図、第5図は直列制御型定電圧回
路内における従来の抵抗の配置を示す回路図、第6図は
抵抗層に加工溝を形成した状態を示す平面図である。 1.11・・・抵抗層 2、2’、 12.13.14・・・電極3・・・加工
溝 15・・・シリコン酸化膜 16・・・シリコン基板 代理人 弁理士  則 近 憲 借 問     竹 花 喜久男 第 3 図 (11〕 第 1 図 第 4 図 第 2 図 (θ) (b)    (c) 第 5 目 1 千ら↑A1 (J)) 第 図
FIG. 1 (1) is a plan view of a resistance layer and an electrode showing one embodiment of the present invention, FIG. 1 (11) is a cross-sectional view taken along the line A-A', and FIG. FIG. 3 is a plan view of a resistance layer and electrodes showing a third embodiment of the present invention, and FIG. 4 is a circuit showing a general series controlled variable constant voltage circuit. 5 is a circuit diagram showing the arrangement of conventional resistors in a series controlled constant voltage circuit, and FIG. 6 is a plan view showing a state in which processed grooves are formed in the resistance layer. 1.11...Resistance layer 2, 2', 12.13.14...Electrode 3...Processed groove 15...Silicon oxide film 16...Silicon substrate agent Patent attorney Nori Chika Borrowed bamboo Hana Kikuo Fig. 3 (11) Fig. 1 Fig. 4 Fig. 2 (θ) (b) (c) Fig. 5 1 1000 ↑ A1 (J)) Fig.

Claims (1)

【特許請求の範囲】[Claims] 半導体素子を備えた基板と、その基板上に離間して配置
された第1および第2の電極と、前記第1−第2電極間
に配置され抵抗値のトリミングによる加工溝が形成され
ている抵抗層と、前記第1,第2の電極と離間して配置
され前記抵抗層に接続されている第3の電極とを具備し
たことを特徴とする半導体装置。
A substrate including a semiconductor element, first and second electrodes spaced apart from each other on the substrate, and a groove formed by trimming a resistance value between the first and second electrodes. A semiconductor device comprising: a resistive layer; and a third electrode spaced apart from the first and second electrodes and connected to the resistive layer.
JP63158174A 1988-06-28 1988-06-28 Semiconductor device Pending JPH029160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63158174A JPH029160A (en) 1988-06-28 1988-06-28 Semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63158174A JPH029160A (en) 1988-06-28 1988-06-28 Semiconductor device

Publications (1)

Publication Number Publication Date
JPH029160A true JPH029160A (en) 1990-01-12

Family

ID=15665892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63158174A Pending JPH029160A (en) 1988-06-28 1988-06-28 Semiconductor device

Country Status (1)

Country Link
JP (1) JPH029160A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5835965A (en) * 1981-08-28 1983-03-02 Matsushita Electric Ind Co Ltd Semiconductor device
JPS59208867A (en) * 1983-05-13 1984-11-27 Sanken Electric Co Ltd How to form resistors in integrated circuits

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5835965A (en) * 1981-08-28 1983-03-02 Matsushita Electric Ind Co Ltd Semiconductor device
JPS59208867A (en) * 1983-05-13 1984-11-27 Sanken Electric Co Ltd How to form resistors in integrated circuits

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