US3895207A - Method and device for the production of metal-free paths on metalized insulator foils - Google Patents

Method and device for the production of metal-free paths on metalized insulator foils Download PDF

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Publication number
US3895207A
US3895207A US459621A US45962174A US3895207A US 3895207 A US3895207 A US 3895207A US 459621 A US459621 A US 459621A US 45962174 A US45962174 A US 45962174A US 3895207 A US3895207 A US 3895207A
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United States
Prior art keywords
electrode
burning
accordance
guide roller
foils
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Expired - Lifetime
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US459621A
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English (en)
Inventor
Hermann Heywang
Manfred Kobale
Gerhard Seebacher
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Siemens AG
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Siemens AG
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Publication date
Priority claimed from DE19732318754 external-priority patent/DE2318754C3/de
Application filed by Siemens AG filed Critical Siemens AG
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Publication of US3895207A publication Critical patent/US3895207A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
    • H01G13/06—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00 with provision for removing metal surfaces

Definitions

  • FIGURE is a schematic view of a preferred device according to this invention.
  • the present invention relates to a method and a device for burning free paths into metalization layers disposed upon insulator foils, whereby these foils move at high production speeds.
  • a high-frequency relatively low voltage is applied between a metalized foil and the burning electrode.
  • the burning electrode and the metalized foil are pressed against one another and against a guide roller, and the burning electrode is moved with respect to the guide roller, so that the contact portion of the burning electrode is continuously renewed.
  • the continuous renewal of the contact portion of the burning electrode permits the use of a low voltage since the foil material which deposits upon the electrode during the burning process cannot interrupt the current.
  • the advantage of a low voltage is an exact path margin. Arc discharges are almost entirely avoided, and the metal is removed only in the electrode area.
  • a relatively high frequency permits a capacitive coupling between the metalized foil and the corresponding electrode, even if the electrode contacts the metalized foil directly. This is due to impurities or oxide layers.
  • the direct contact between the electrodes and the metalized foil is another factor permitting the decrease of the burning voltage since little air resistance has to be overcome.
  • the direct contact between the electrode and the metalized foil also results in a more perfect burn path.
  • the method of this invention can also be used to burn paths into metalizations covering both sides of an insulator foil.
  • the burning electrode is applied in the area of one of several guide rollers, and at least one of these guide rollers is in contact with'the metalized foil. If the frequency is high, the capacitive resistance between the roller and the metalized foil is so small that a current concentration, which may occur in the case of an arc discharge, cannot destroy the metalized foil.
  • a fairly large basic frequency of at least approximately kHz (100,000 cycles/sec) should be used with a common capacitor foil and a roller diameter of approximately 6 cm.
  • a sinusoidal alternate voltage is used, but a direct voltage with animpulse frequency of at least approximately 100 kHz is also applicable.
  • the quality of the impulse shape is not particularly important.
  • a rotating electrode is used, and the burning process is started with a relatively high current, due to a correspondingly high voltage, and this current is gradually decreased after the beginning of the burning process.
  • the burn path obtains a perfect start, while the use of a lower voltage avoids that the path becomes too wide.
  • these electrodes may be roll-shaped, while endless tapes or wires are required with the higher advance speeds as they are common in the production of capacitor foils.
  • the contact parts of the electrode are cleaned before they are reused. This may be done by way of wiping.
  • a high production speed for instance 1 m/sec.
  • an aluminum layer has a conductivity of 0.5 Siemens (Mhos)
  • the insulator material foil has a thickness of approximately 3.5 pm
  • a sinusoidal highfrequency voltage of approximately 500 kHz and an effective value of 12 Volts is most advantageous.
  • a common HF-tube transmitter may be used, and the low voltage is particularly important when thick foils are burned is obtained with a correspondingly designed transformer. It is also possible to apply transistor voltage sources.
  • metalizations foils having, for instance, a surface conductivity of approximately Siemens. These metalized foils are advantageously applied to carrier foils of approximately 40 um thickness.
  • the burning process is started with a relatively high voltage of approximately 30 Volts. This is due to the fact that the current dissipates at first via the conductive metal layer. Particularly in the case of thick carrier foils, an additional contact via one of the guide rollers is desired or required.
  • the plastic foil contacts one of the guide rollers, while the burning electrode is pressed against the metalized foil upon this guide roller.
  • the electric resistance is made as small as possible by providing the burning electrode with a smooth contact surface.
  • the heat capacity of the burning electrode must be as large as possible, so that the current or the evaporating metal cannot damage the electrode.
  • relatively narrow burn paths of approximately 0.1 mm are produced, whereby the electrode is a metal wire of a somewhat larger diameter than the width of the burn path.
  • a burn path which is wider than approximately 0.7 mm is produced by an electrode made of a metal tape of approximately the same width.
  • a metal tape can be relatively easily bent perpendicular to its width, and thus it does not require great contact pressures. This is particularly important when thin plastic foils are used which may be easily damaged.
  • An additional advantage of this arrangement is that the tape may contact the metalized foil at a somewhat larger length upon the circumference of the guide roller, if such a roller is used,
  • a burn path of approximately 0.6 mm may be produced with common impulse voltages of an amplitude of approximately 60 volts.
  • a wire of approximately 1 mm could be used or a metal tape of approximately 0.5 mm width. If the wire or the metal tape consist of the same material, their bending forces are.re-
  • the moment of inertia of a wire (1 and the moment of inertia of the rectangular tape (1:1) are the following, whereby a is the tape thickness and b is the tape width;
  • the force required to deform a tape is thus only approximately 1 /10,000 of that required to bend a round wire.
  • metal tapes are more advantageous when the electrode width is more than 0.4 mm, whereby silver-coated copper tapes of 30 am thickness are most advantageous.
  • Nickel ferrite tapes are more suited for narrower burn paths, due to their greater tensile strength. They should have a thickness of approximately 50 ,um. 1f the width of the burn path is 0.3 mm, the tape width should be 0.25 mm and its thickness 50 If a preferred voltage of 12 Volts is applied to a metalized foil with a conductivity of 0.5 Siemens, the width of the burn path will be approximately 50 am more than that of the metal tape.
  • the electrode is particularly wide, plastic tapes with an aluminum coating and a surface conductivity of at least 10 Siemens are particularly suited. It is also possible to replace the aluminum layer by carbon or graphite layers. Such electrodes are advantageous when relatively wide paths are burnt into thin insulator foils, for instance approximately 2 mm wide burn paths.
  • the electrodes may be supplied from a roll and transferred onto another roll during the burning process. This embodiment is suited when very narrow and sensitive electrodes are used which cannot be easily cleaned.
  • burn paths If several burn paths are produced, they should be arranged next to one another, while being connected with outputs of alternate voltage sources or impulse generators.
  • the burning electrodes are arranged adjacent to a cutting device, for instance approximately 5 cm away from this cutting device, so that the insulator foil can be split in the center of the burnt path.
  • an insulator material foil 1 carrier a metalization layer 2 and moves via the guide rollers 3 and 4 which are grounded.
  • the guide roller 3 contacts the metalized foil 2.
  • a metal tape 5 serves as burning electrode and contacts the metalized foil 2 upon the guide roller 4, whereby it partially embraces the roller. 4.
  • Terminal 11 contacts both the supply roll 6 and a pole of a burning voltage, and the electrode 5 is rolled from the supply roll 6 onto the roll 7.
  • the electrode 5 moves slowly with respect to the area 12 where it contacts the metalized foil 2, in a direction opposite to the moving direction of the insulator material foil 1.
  • Tape guides 8 and 9 prevent a lateral movement of the metal tape 5.
  • the tape guide 9 is embodied as a roller with a guide groove.
  • This embodiment is particularly suited for a burning electrode operating at low advance speeds or for a burning electrode which is to be used for relatively thick metalizations.
  • the embodiment of guide 9 as a roller permits a perfecttransport of the electrode 5, even as metal has deposited thereon.
  • the arrangement according to the FlGURE results in a perfect burn path 10 upon the insulator foil 1.
  • Method of producing free paths in metalizations upon insulator foils comprising the steps of applying a relatively low voltage of a high frequency between a guide roller and a burning electrode and pressing a metalized foil against the guide roller to form a capacitive coupling between the guide roller and the metalized foil;
  • a device for producing metal-free strips in metal layers disposed upon insulator foils comprising:
  • At least one burning electrode contacting the metalization and moving with respect to the metalized foil directly and continuously replacing its contact portions, wherein the burning electrode is a tape or wire, wherein a groove guide roller guides the used portion of the electrode and wherein the burning electrode is bent partially around another guide roller.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
US459621A 1973-04-13 1974-04-10 Method and device for the production of metal-free paths on metalized insulator foils Expired - Lifetime US3895207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732318754 DE2318754C3 (de) 1973-04-13 Vorrichtung zur Herstellung metallfreier Streifen auf einer metallisierten Isolierstoffolie

Publications (1)

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US3895207A true US3895207A (en) 1975-07-15

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US459621A Expired - Lifetime US3895207A (en) 1973-04-13 1974-04-10 Method and device for the production of metal-free paths on metalized insulator foils

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US (1) US3895207A (xx)
CH (1) CH569356A5 (xx)
ZA (1) ZA742132B (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4634826A (en) * 1984-02-20 1987-01-06 Solems S.A. Method for producing electric circuits in a thin layer, the tool to implement the method, and products obtained therefrom
US4670639A (en) * 1985-04-24 1987-06-02 Siemens Aktiengesellschaft Method for the formation of narrow, metal-free strips in a metal layer on plastic sheets
US5061837A (en) * 1989-05-02 1991-10-29 Webex, Inc. Method and apparatus for selectively demetallizing a metallized film
US5097586A (en) * 1990-12-14 1992-03-24 General Electric Company Spray-forming method of forming metal sheet
US5179172A (en) * 1988-10-06 1993-01-12 Henkel Research Corporation Epichlorohydrin or chlorine-containing vinyl or acrylate (co)polymer-modified amines
EP2525395A1 (en) * 2011-05-17 2012-11-21 DelSolar Co., Ltd. Machine for manufacturing electrode tapes

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435441A (en) * 1942-10-23 1948-02-03 Hunt A H Ltd Process for demetallizing metallized paper
US2671157A (en) * 1951-06-25 1954-03-02 Cornell Dubilier Electric Means for manufacturing metallized electrical capacitors
US3013140A (en) * 1959-03-04 1961-12-12 Plessey Co Ltd Apparatus for making electrical capacitors
US3119919A (en) * 1961-01-30 1964-01-28 Daystrom Inc Apparatus for the removal of portions of deposited metal films
US3585338A (en) * 1968-05-29 1971-06-15 Marconi Co Canada Thin film hybrid circuit resistor trimmer
US3596043A (en) * 1969-04-11 1971-07-27 Southern Can Co Method of seam welding overlapping workpieces

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435441A (en) * 1942-10-23 1948-02-03 Hunt A H Ltd Process for demetallizing metallized paper
US2671157A (en) * 1951-06-25 1954-03-02 Cornell Dubilier Electric Means for manufacturing metallized electrical capacitors
US3013140A (en) * 1959-03-04 1961-12-12 Plessey Co Ltd Apparatus for making electrical capacitors
US3119919A (en) * 1961-01-30 1964-01-28 Daystrom Inc Apparatus for the removal of portions of deposited metal films
US3585338A (en) * 1968-05-29 1971-06-15 Marconi Co Canada Thin film hybrid circuit resistor trimmer
US3596043A (en) * 1969-04-11 1971-07-27 Southern Can Co Method of seam welding overlapping workpieces

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4634826A (en) * 1984-02-20 1987-01-06 Solems S.A. Method for producing electric circuits in a thin layer, the tool to implement the method, and products obtained therefrom
US4670639A (en) * 1985-04-24 1987-06-02 Siemens Aktiengesellschaft Method for the formation of narrow, metal-free strips in a metal layer on plastic sheets
US5179172A (en) * 1988-10-06 1993-01-12 Henkel Research Corporation Epichlorohydrin or chlorine-containing vinyl or acrylate (co)polymer-modified amines
US5061837A (en) * 1989-05-02 1991-10-29 Webex, Inc. Method and apparatus for selectively demetallizing a metallized film
US5097586A (en) * 1990-12-14 1992-03-24 General Electric Company Spray-forming method of forming metal sheet
EP2525395A1 (en) * 2011-05-17 2012-11-21 DelSolar Co., Ltd. Machine for manufacturing electrode tapes
US8864483B2 (en) 2011-05-17 2014-10-21 Neo Solar Power Corp. Machine for manufacturing electrode tape

Also Published As

Publication number Publication date
DE2318754B2 (de) 1976-09-30
CH569356A5 (xx) 1975-11-14
ZA742132B (en) 1975-03-26
DE2318754A1 (de) 1974-10-31

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