EP0450107B1 - Method of manufacturing a resistance element - Google Patents

Method of manufacturing a resistance element Download PDF

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Publication number
EP0450107B1
EP0450107B1 EP90106138A EP90106138A EP0450107B1 EP 0450107 B1 EP0450107 B1 EP 0450107B1 EP 90106138 A EP90106138 A EP 90106138A EP 90106138 A EP90106138 A EP 90106138A EP 0450107 B1 EP0450107 B1 EP 0450107B1
Authority
EP
European Patent Office
Prior art keywords
resistance
cut
resistance layer
trimming
layer
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.)
Expired - Lifetime
Application number
EP90106138A
Other languages
German (de)
French (fr)
Other versions
EP0450107A1 (en
Inventor
Andreas Dr.-Ing. Wildgen
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP90106138A priority Critical patent/EP0450107B1/en
Priority to DE90106138T priority patent/DE59004937D1/en
Priority to US07/676,570 priority patent/US5113577A/en
Priority to JP3066369A priority patent/JPH0744095B2/en
Publication of EP0450107A1 publication Critical patent/EP0450107A1/en
Application granted granted Critical
Publication of EP0450107B1 publication Critical patent/EP0450107B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
    • H01C17/24—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49099—Coating resistive material on a base

Definitions

  • FIG. 1 shows a resistance element adjusted according to the invention. It consists of a rectangular support 1, on a rectangular resistance layer 4 of constant cross section and constant width lies between two end pieces 2, 3, There are interruptions in the resistance layer 4 in the form of two sectional structures 5, 6.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Widerstandselementes gemäß Oberbegriff von Anspruch 1, wie er aus der DE 31 27 081 bekannt ist.The invention relates to a method for producing a resistance element according to the preamble of claim 1, as is known from DE 31 27 081.

Dort ist beschrieben, die Widerstandsschicht mit Laserschnitten gemäß einer vorgegebenen Schnittstruktur zu zerteilen. Die Widerstandswerte der so hergestellten Widerstandselemente besitzen eine gewisse Streuung.It describes how to cut the resistance layer with laser cuts in accordance with a predetermined cutting structure. The resistance values of the resistance elements produced in this way have a certain spread.

Aus der DE 30 42 720 ist eine Widerstandsanordnung bekannt, bei der der Widerstand vor dem Abgleich unter einem Sollwert liegt und bei welcher der Abgleich des Widerstandselementes auf dem Sollwert durch Abtragen von Teilen der Widerstandsschicht erfolgt. Die dort beschriebene Lösung hat jedoch den Nachteil, daß nach dem Abgleich der Stromfluß durch das Widerstandselement auf einen Teilbereich am Rand beschränkt ist und der Stromfluß diesen Teilbereich erwärmt, was zu Meßfehlern führen kann.From DE 30 42 720 a resistor arrangement is known in which the resistance before the adjustment lies below a setpoint value and in which the resistance element is adjusted to the setpoint value by removing parts of the resistance layer. However, the solution described there has the disadvantage that, after the adjustment, the current flow through the resistance element is limited to a partial area at the edge and the current flow heats this partial area, which can lead to measurement errors.

Es ist Aufgabe der vorliegenden Erfindung ein Verfahren zum Herstellen eines Widerstandselementes anzugeben, bei welchem der Widerstandswert in einem engen Toleranzbereich liegt und der Stromfluß auf dem Widerstandselement verteilt ist.It is an object of the present invention to provide a method for producing a resistance element, in which the resistance value is within a narrow tolerance range and the current flow is distributed over the resistance element.

Die erfindungsgemäße Lösung dieser Aufgabe ist in Anspruch 1 angegeben.The solution to this problem according to the invention is specified in claim 1.

Die Erfindung wird anhand einer Figur näher erläutert.The invention is illustrated by a figure.

Figur 1 zeigt ein gemäß der Erfindung abgeglichenes Widerstandselement. Es besteht aus einem rechteckigen Träger 1, auf dem zwischen zwei Endstücken 2, 3 eine rechteckige Widerstandsschicht 4 konstanten Querschnitts und konstanter Breite liegt,
In der Widerstandsschicht 4 befinden sich Unterbrechungen in Form von zwei Schnittstrukturen 5, 6.FIG. 1 shows a resistance element adjusted according to the invention. It consists of a rectangular support 1, on a rectangular resistance layer 4 of constant cross section and constant width lies between two end pieces 2, 3,
There are interruptions in the resistance layer 4 in the form of two sectional structures 5, 6.

Die einzelnen Schnittstrukturen bestehen aus je einem Hauptschnitt 51, 61 und mehreren vom Hauptschnitt 51, 61 nach einer Seite abgehenden Nebenschnitten 511, 611. Die Hauptschnitte 51, 61 verlaufen vom Trägerrand 11 im rechten Winkel ausgehend über ca. 2/3 der Widerstandsschicht 4. Die von den Hauptschnitten 51, 61 abgehenden Nebenschnitte 511, 611 verlaufen parallel zum Trägerrand 11. Die Schnittstrukturen 5 und 6 sind so zueinander angeordnet, daß die Nebenschnitte 511, 611 ineinandergreifen, sich jedoch nicht berühren. Durch diese Anordnung ergibt sich zwischen den Endstücken 2, 3 eine mäanderförmige Widerstandsbahn 7. Die Widerstandsbahn 7 setzt sich zusammen aus den einzelnen Teilbahnen 71, 72, 73, 74 und 75.The individual cut structures each consist of a main cut 51, 61 and a plurality of secondary cuts 511, 611 which extend from the main cut 51, 61 to one side. The main cuts 51, 61 extend from the support edge 11 at right angles over approximately 2/3 of the resistance layer 4. The secondary cuts 511, 611 extending from the main cuts 51, 61 run parallel to the support edge 11. The cut structures 5 and 6 are arranged with respect to one another in such a way that the secondary cuts 511, 611 interlock but do not touch. This arrangement results in a meandering resistance track 7 between the end pieces 2, 3. The resistance track 7 is composed of the individual partial tracks 71, 72, 73, 74 and 75.

Der Widerstand zwischen den Endstücken 2, 3 liegt vor dem Abgleich unter dem Sollwert für das abgeglichene Widerstandselement. Um das Widerstandselement auf den Sollwert abzugleichen wird von jeder der Teilbahnen 71 bis 75 durch Trimmschnitte 81 bis 85 ein bestimmter Bereich abgetrennt. Die Trimmschnitte 81 bis 85 verlaufen vom freien Ende der Nebenschnitte 511 bzw. 611 ausgehend parallel zu diesen. Die Trimmschnitte 81 bis 85 enden in den zu den jeweiligen Nebenschnitten 511 bzw. 611 zugehörigen Hauptschnitten 61 bzw. 51. Dadurch ist der Bereich zwischen einem der Nebenschnitte 511, 611 und dem dazugehörigen Trimmschnitt elektrisch von der übrigen Widerstandsbahn isoliert. Auf diese Weise ist mit einem einzigen Trimmschnitt pro Teilbahn 71 bis 75 der Abgleich erfolgt.The resistance between the end pieces 2, 3 is below the setpoint for the adjusted resistance element before the adjustment. In order to adjust the resistance element to the desired value, a certain area is separated from each of the partial webs 71 to 75 by trimming cuts 81 to 85. The trim cuts 81 to 85 run parallel to these starting from the free end of the secondary cuts 511 and 611. The trim cuts 81 to 85 end in the main cuts 61 and 51 associated with the respective secondary cuts 511 and 611. As a result, the area between one of the secondary cuts 511, 611 and the associated trim cut is electrically isolated from the rest of the resistance track. In this way, the adjustment was carried out with a single trim cut per partial web 71 to 75.

In dem hier gezeigten Beispiel nimmt die Breite der einzelnen Teilbahnen 71 bis 75 stetig ab. Die Trimmschnitte 81 bis 85 sind so gelegt, daß die Breite der verbleibenden, stromdurchflossenen Bereiche der Teilbahnen 71 bis 75 ebenso stetig abnimmt.In the example shown here, the width of the individual partial webs 71 to 75 is continuously decreasing. The trim cuts 81 to 85 are placed in such a way that the width of the remaining, current-carrying regions of the partial webs 71 to 75 also decreases continuously.

Die Widerstandsschicht kann durch eine Schutzschicht überzogen werden, wobei bei deren Auftragen ein Teil der Widerstandsschicht freigebassen werden kann.The resistance layer can be covered by a protective layer, and a part of the resistance layer can be left free when it is applied.

Claims (3)

  1. Method for producing a resistor element having a substrate, a resistance layer which is applied on the substrate and a resistor arrangement which is formed by cutting the resistance layer and whose resistance has a required value between two end pieces,
    - the resistance layer being divided in accordance with a predetermined cutting structure,
    - the resistor arrangement being formed between the end pieces in the form of at least one resistance track having an essentially constant width and constant cross-section on the substrate,
    - the cutting structure comprising two comb-like individual structures each having a main cut and a plurality of auxiliary cuts originating from the main cut on one side, and
    - the individual structures being arranged such that
    -- the auxiliary cuts are arranged engaging in one another and
    -- the individual structures do not touch one another,
    characterized in that
    - the resistance of the resistor arrangement is less than the required value and
    - the trimming of the resistor element to the required value is carried out by removing parts of the resistance layer,
    - at least one trimming cut is made in the resistance layer for trimming the resistor element, which trimming cut
    -- is guided, originating from the free end of an auxiliary cut, running parallel thereto to the associated main cut in order electrically to insulate a track section between the auxiliary cut and the trimming cut from the remaining resistance track.
  2. Method according to Claim 1, characterized in that the resistance layer is coated with a protective layer.
  3. Method according to Claim 2, characterized in that a part of the resistance layer is exposed when the protective layer is applied.
EP90106138A 1990-03-30 1990-03-30 Method of manufacturing a resistance element Expired - Lifetime EP0450107B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP90106138A EP0450107B1 (en) 1990-03-30 1990-03-30 Method of manufacturing a resistance element
DE90106138T DE59004937D1 (en) 1990-03-30 1990-03-30 Method of manufacturing a resistance element.
US07/676,570 US5113577A (en) 1990-03-30 1991-03-28 Method for producing a resistor element
JP3066369A JPH0744095B2 (en) 1990-03-30 1991-03-29 Resistance element manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90106138A EP0450107B1 (en) 1990-03-30 1990-03-30 Method of manufacturing a resistance element

Publications (2)

Publication Number Publication Date
EP0450107A1 EP0450107A1 (en) 1991-10-09
EP0450107B1 true EP0450107B1 (en) 1994-03-09

Family

ID=8203839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106138A Expired - Lifetime EP0450107B1 (en) 1990-03-30 1990-03-30 Method of manufacturing a resistance element

Country Status (4)

Country Link
US (1) US5113577A (en)
EP (1) EP0450107B1 (en)
JP (1) JPH0744095B2 (en)
DE (1) DE59004937D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2504713B2 (en) * 1993-03-09 1996-06-05 タキゲン製造株式会社 Lock handle device for drawer revolving door
US5559287A (en) * 1993-05-28 1996-09-24 Siemens Aktiengesellschaft Device for reducing drift in measuring instruments
US5787563A (en) * 1996-05-07 1998-08-04 Mst Automotive Of America Inc. Method for assembling a compressed air bag inflator
JP2004014697A (en) * 2002-06-05 2004-01-15 Denso Corp Resistor and trimming method therefor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD138489A3 (en) * 1976-12-04 1979-11-07 Dietrich Schuetz METHOD FOR HIGH-EFFICIENT ADJUSTMENT OF COAT RESISTANCE BY LOADING CARRIER BEAM
GB2064226B (en) * 1979-11-23 1983-05-11 Ferranti Ltd Trimming of a circuit element layer
DE3117957A1 (en) * 1981-05-07 1982-11-25 Draloric Electronic GmbH, 6000 Frankfurt Method for producing a film resistor, and a film resistor produced according to this method
DE3127081C2 (en) * 1981-07-09 1985-01-24 Degussa Ag, 6000 Frankfurt Device for measuring the flow rate of gases and liquids
US4429298A (en) * 1982-02-22 1984-01-31 Western Electric Co., Inc. Methods of trimming film resistors
US4626822A (en) * 1985-05-02 1986-12-02 Motorola, Inc. Thick film resistor element with coarse and fine adjustment provision

Also Published As

Publication number Publication date
EP0450107A1 (en) 1991-10-09
DE59004937D1 (en) 1994-04-14
JPH0744095B2 (en) 1995-05-15
US5113577A (en) 1992-05-19
JPH04225201A (en) 1992-08-14

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