US3594686A - Sliding-type variable resistor having thin film resistor layer comprising strap resistors - Google Patents

Sliding-type variable resistor having thin film resistor layer comprising strap resistors Download PDF

Info

Publication number
US3594686A
US3594686A US4987A US3594686DA US3594686A US 3594686 A US3594686 A US 3594686A US 4987 A US4987 A US 4987A US 3594686D A US3594686D A US 3594686DA US 3594686 A US3594686 A US 3594686A
Authority
US
United States
Prior art keywords
strap
resistor
tap
resistors
resistance
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
US4987A
Other languages
English (en)
Inventor
Tatsuo Fujii
Yutaka Watano
Masaaki Tsukamoto
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.)
Nikon Corp
Original Assignee
Nippon Kogaku KK
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 Nippon Kogaku KK filed Critical Nippon Kogaku KK
Application granted granted Critical
Publication of US3594686A publication Critical patent/US3594686A/en
Assigned to NIKON CORPORATION, 2-3, MARUNOUCHI 3-CHOME, CHIYODA-KU, TOKYO, JAPAN reassignment NIKON CORPORATION, 2-3, MARUNOUCHI 3-CHOME, CHIYODA-KU, TOKYO, JAPAN CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APR. 1, 1988 Assignors: NIPPON KOGAKU, K.K.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/46—Arrangements of fixed resistors with intervening connectors, e.g. taps
    • H01C10/48—Arrangements of fixed resistors with intervening connectors, e.g. taps including contact movable in an arcuate path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/46—Arrangements of fixed resistors with intervening connectors, e.g. taps

Definitions

  • Tolin Attarneyward, McElhannon, Brooks & Fitzpatrick ABSTRACT The sliding-type variable resistor including thin film strap resistor layers formed by vacuum deposition, spattering, etc. upon an insulating material base, a plurality of tap electrodes and a sliding brush slidable thereover. Tap electrodes are arranged in the path of travel of the brush and extended in one direction from the path. Strap resistors are arranged with the same pitch as that of the tap electrodes and one end of the resistor overlays on the extended portion of the corresponding tap electrode. Each strap resistor overlays on the ends of two strap connectors, and each strap connector overlays on two adjacent strap resistors.
  • An object of the present invention is to provide a variable resistor having thin resistor layers in which the stepped resistor layer section is provided so that the high resistance which has been so far unattainable by the conventional variable resistor can be obtained.
  • the error caused by the misalignment of the mask patterns used in the vacuum deposition of the resistor layers, etc. may be minimized.
  • stepped resistor layer section To this stepped resistor layer section is further connected a zigzag resistor section, so that one resistor layer may cover a wide range of resistance up to a very high resistance.
  • a pattern is employed which permits one resistor layer to cover a wide range of resistance in the direction perpendicular to the path of travel of a sliding brush of an adjustable registor. Furthermore, it is possible to minimize the error in resistance caused by the misalignment of the mask for forming tap electrodes with the mask for forming resistor layer and by the tolerances of the manufacture of the patterns. Therefore, an adjustable registor with a higher degree of precision which can vary its resistance in accordance with a given function may be provided at a less expense with a high yield.
  • FIG. 1 is a plan view of thin film resistor layers of a conventional sliding-type variable resistor
  • FIG. 2 is a plan view of one embodiment of the present invention.
  • FIG. 3 is for explanation of the correction is resistance in a step manner in accordance with the present invention.
  • FIGS. 4 and 5 are fragmentary plan views of the conventional resistors for explanation of the defects thereof.
  • FIG. 6 is a view similar to FIG. 3 for explanation of the correction in resistance in a step manner in accordance with the present invention.
  • the tap electrodes I are formed at right angles relative to the path of the sliding brush and a wedge-shaped resistor layer 2 which is tapered in accordance with a function is overlaid upon the tap electrodes .1.
  • Another resistor layer 3 is located so as to extend from the tip end of the wedge-shaped resistor layer 2.
  • the tip end of the resistor layer 2 has the width as minimum as possible in the fabrication technique and the resistor layer 3 has a resistance per unit of area (surface resistance) higher than that of the resistor layer 2.
  • the present invention contemplates to eliminate the defects of the conventional adjustable resistor of the type described.
  • reference numerals 4, 4' and 4" designate tap electrodes which contact with a sliding brush and are made of a material having a low shut resistance, a strong resistance to abrasive wear and a property for ensuring a better electrical contact with the sliding brush.
  • Reference numerals 5 and 5 designate connecting straps made of same material as the electrodes. and formed by the vacuum deposition simultaneously with the formation of the tap electrodes 4, 4 and 4" by use of. the same mask. That is, the same or common mask is provided with slots for forming the tape electrodes 4, 4' and 4" and the slots for forming the connecting straps 5 and 5'.
  • a resistance layer 6 has a relatively high sheet resistance and a wedge shape generally indicated by P whose width S is so varied as to provide a variation in resistance in accordance with a given function. (Such a resistor will be referred to as function resistor hereinafter for brevity.)
  • Strap resistors 7 are formed simultaneously with the resistor layer 6 and arranged in sideby-side relation with the tap electrodes 4' with the same pitch therewith. The tap electrodes 4 and the strap resistors 7 are overlapped at the outside of the path K of the slidingbrush, and the width of the tap electrode 4' is made wider than that of the corresponding strap resistor 7.
  • the strap resistors 7 are also formed simultaneously with the resistor layer 6 and the strap resistor 7 and arranged so that two strap resistors 7' are provided for every one of the tap electrodes 4-".
  • the strap connectors 5 are overlaid with two strap resistors respectively in the stepped resistor section Q and one of the strap connectors 5 is connected to the strap resistor formed adjacent to the lower resistor layer.
  • the strap connectors 5 are overlaid with all of the strap resistors 7' in the zigzag resistor section R. That is, the adjacent strap resistors which are not connected to a common tap electrode 4"v are bridged by the strap connector 5'.
  • Reference numeral 9 designates an electrically insulating 7 base and is provided with a notch 10a at one portion of the outer periphery 8 thereof at the intermediate of the zigzag resistor section R so that the strap resistors in the zigzag resistor section, the tap electrodes and the strap connectors are not overlapped one upon another when vacuum deposited.
  • Reference numeral 10 is a pin which serves to determine the reference position in case of the vacuum deposition, of the resistance layers, and tap electrodes upon the base 9, by abutting the pin 10 against one side edge of the notch l0a of the base 9.
  • the sliding brush generally indicated by J is comprised of contacts .I I, J2, J3 and J4 and adapted to slide over the path K. It is noted that the contacts are not arranged in line as shown in FIG. 2 so that the contactor as a whole may contact with more than two tap electrodes.
  • the wedge-shaped resistor layer 6 increases its resistance in logarithmic manner.
  • the width 8' of the resistor is gradually decreased and reaches the limit of fabrication or desposition.
  • the resistance is in proportion to the distance from the terminal N, which is considered as the reference point, but in inverse proportion to the width. Therefore, when the width of each resistor is made constant and the resistors are arranged and connected as shown in the sections Q and R in FIG. 2, it is possible to obtain a higher resistance than the wedge-shaped resistor within a limited space.
  • the step resistor section Q is interposed between the wedgeshaped resistor 6 and the zigzag resistor section R so that the abnormal resistance caused, as shown at b and g in FIG.
  • the position of the base 9 is determined by fitting the reference pin 10 into the notch 10a, but as long as the taps 4", the strap connector 5' and the strap resistor 7' are deposited individually, the errors in their relative positions are inevitably caused. Therefore, as shown in FIG. 5, the deviations are caused between the tap 4" and the strap resistor 7 and between the latter and the strap connector 5" so that the abnormal resistances appear at the portions 5a" and 5b" because of the nonuniform current flow through these positions. Especially in the low resistance section the abnormal resistance in excess of the permissible tolerance cannot be disregarded at all.
  • the zigzag resistor section R having such a high resistance that the abnorrnal resistance as described above may be negligible is providedand between the wedge-shaped resistor layer 6 and the zigzag resistor section R is interposed the step resistor section as shown in FIG. 3.
  • the increment in length of the strap re sistor relative to the increment in resistance between the adjacent taps is relatively small as compared to that in the section R so that only one strap resistor is enough for each of the taps.
  • the tolerances a and a between the tap 4' and the strap resistor 7, the tolerance d between the strap connector and the strap resistor -7 and the spacings hand h may be made larger so that even when the relative position between the tap and the strap resistor is slightly deviated from their correct positions, the abnormal resistances appeared in the position b and g in FIG. 5 may be prevented.
  • the abnormal resistance in the zigzag section R can be eliminated.
  • the strap connector 50' to be connected to the, tap it is vacuum deposited at a position spaced apart from the strap connector 50 upwardly by a distance of Y.
  • the distance Y must be so selected I that the spacing between the strap connector 5c between the strap resistors connected to the taps n-3 and n-2 and the strap connector 5a" may become larger than the minimum permissible spacing which is allowed in preparation of the vacuum deposition masks. Therefore, the increment in length A Yn between the strap resistors connected to the taps n-l and n relative to the increment in resistance Rn between the two adjacent taps n-l and n when the strap connector 5a is not deposited at the raised position and when the resistance of the tap is negligible.
  • the strap connector 5a" is placed between the electrode 4a" and the strap connector 5a so that the distance Y, is reduced by the width W, so that the distance 2,, should also be reduced by W for securing l namely,
  • the strap connectors may be arranged slantingly as indicated by dotted lines 11 and 12 in FIG. 2.
  • oneresistor layer may provide a wide range of resistance with less relative error in a limited space. Even though the arrangement is such that the two adjacent tap electrodes are interconnected by the strap resistor layer extending radially, the influence b the misalignment between the tap electrode and the strap resistor may be remarkably minimized. Therefore, the adjustable resistor whose resistance may be varied in accordance with a given function may be provided at a low cost with a higher degree of accuracy.
  • the lengths of the strap resistors may be reduced in the lower resistance side so that the errors in width of the strap resistors may be reduced. Therefore, the relative error in resistance in the lower resistance side may be minimized.
  • the spacing between the strap connectors that is the dimensions of the bridging portion of the mask may be sufficiently provided without causing any difficulty in fabrication. Furthermore, the pitch can be made smaller.
  • the types of the resistor layers may be reduced so that a number of vacuum deposition may be reduced, thereby preventing the superposition of various errors in vacuum deposition. Thus better quality and low-cost precision resistors may be provided.
  • a variable resistor comprising thin film resistor layers formed upon an insulating base, a plurality of tap electrodes and a sliding brush for slidable movement over said tap electrodes, an'improvement resides in that strap-shaped tap elecnector 50" may be spaced apart from the trodes (4) arranged in side-by-side relation in the path of travel of said sliding brush are extended in one direction out of said path;
  • each of said strap connectors is overlaid only upon the two adjacent strap resistors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
US4987A 1969-01-31 1970-01-22 Sliding-type variable resistor having thin film resistor layer comprising strap resistors Expired - Lifetime US3594686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1969007905U JPS4738847Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-01-31 1969-01-31

Publications (1)

Publication Number Publication Date
US3594686A true US3594686A (en) 1971-07-20

Family

ID=11678564

Family Applications (1)

Application Number Title Priority Date Filing Date
US4987A Expired - Lifetime US3594686A (en) 1969-01-31 1970-01-22 Sliding-type variable resistor having thin film resistor layer comprising strap resistors

Country Status (4)

Country Link
US (1) US3594686A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4738847Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE7003251U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1303263A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675179A (en) * 1969-12-15 1972-07-04 Nippon Kogaku Kk Variable zig-zag resistor with tabs
US3921118A (en) * 1973-10-01 1975-11-18 Gen Electric Variable resistor assembly
US20030024747A1 (en) * 2001-07-31 2003-02-06 Takayuki Enomoto Weight sensor device
US20080204291A1 (en) * 2007-02-27 2008-08-28 Infineon Technologies Digital-to-analog converter with logarithmic selectable response and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2932714C2 (de) * 1979-08-13 1982-08-12 Vdo Adolf Schindling Ag, 6000 Frankfurt Einstellbarer Drehwiderstand in Dickschichttechnik

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632831A (en) * 1951-05-09 1953-03-24 Pritikin Variable resistance element
US2717942A (en) * 1952-06-16 1955-09-13 William J Andrews Voltage divider
US2878357A (en) * 1956-07-13 1959-03-17 Gen Dynamics Corp Electric heated laminated glass panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632831A (en) * 1951-05-09 1953-03-24 Pritikin Variable resistance element
US2717942A (en) * 1952-06-16 1955-09-13 William J Andrews Voltage divider
US2878357A (en) * 1956-07-13 1959-03-17 Gen Dynamics Corp Electric heated laminated glass panel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675179A (en) * 1969-12-15 1972-07-04 Nippon Kogaku Kk Variable zig-zag resistor with tabs
US3921118A (en) * 1973-10-01 1975-11-18 Gen Electric Variable resistor assembly
US20030024747A1 (en) * 2001-07-31 2003-02-06 Takayuki Enomoto Weight sensor device
US6849808B2 (en) * 2001-07-31 2005-02-01 The Furukawa Electric Co., Ltd. Weight sensor device
US20080204291A1 (en) * 2007-02-27 2008-08-28 Infineon Technologies Digital-to-analog converter with logarithmic selectable response and methods
US7733255B2 (en) * 2007-02-27 2010-06-08 Infineon Technologies Ag Digital-to-analog converter with logarithmic selectable response and methods

Also Published As

Publication number Publication date
GB1303263A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-01-17
DE7003251U (de) 1972-09-21
JPS4738847Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-11-24
DE2004335A1 (de) 1970-08-13
DE2004335C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-01-04

Similar Documents

Publication Publication Date Title
US4435691A (en) Dual track resistor element having nonlinear output
KR100498876B1 (ko) 칩형태의네트워크저항기및그제조방법
DE2715475C2 (de) Stufenweise einstellbarer Widerstand
US3594686A (en) Sliding-type variable resistor having thin film resistor layer comprising strap resistors
US6348392B1 (en) Resistor and method of manufacturing the same
US11506594B2 (en) Sulfurization detection resistor
GB1154017A (en) Electronic Circuit Components
US20220319745A1 (en) Chip resistor and method of manufacturing chip resistor
JP2628697B2 (ja) 線形集積化抵抗
GB2142479A (en) Voltage divider
US3675179A (en) Variable zig-zag resistor with tabs
JP3138631B2 (ja) チップ抵抗器及びその製造方法
JP2024111246A (ja) チップ抵抗器
US3414864A (en) Electrical resistor
US3613042A (en) Variable resistance element with spaced rows of parallel tabs
GB1215340A (en) Resistive networks
DE2323484C2 (de) Registrier- und Schreibgerät
JP6453599B2 (ja) チップ抵抗器の製造方法
US3833407A (en) Unitary resistor and shunt
US4463404A (en) Surge voltage arrester with shielding bodies enclosing a column of arrester elements
GB2027279A (en) A network of resistors
US3614704A (en) Sliding member and electrodes for measuring instruments
US3743997A (en) Unitary resistor and shunt
DE3308581C2 (de) Gasentladungsanzeige für eine Meßeinrichtung
GB2054972A (en) Thick film variable resistor

Legal Events

Date Code Title Description
AS Assignment

Owner name: NIKON CORPORATION, 2-3, MARUNOUCHI 3-CHOME, CHIYOD

Free format text: CHANGE OF NAME;ASSIGNOR:NIPPON KOGAKU, K.K.;REEL/FRAME:004935/0584