US20140182932A1 - Disk having an electric connecting element - Google Patents

Disk having an electric connecting element Download PDF

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Publication number
US20140182932A1
US20140182932A1 US14/115,091 US201214115091A US2014182932A1 US 20140182932 A1 US20140182932 A1 US 20140182932A1 US 201214115091 A US201214115091 A US 201214115091A US 2014182932 A1 US2014182932 A1 US 2014182932A1
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US
United States
Prior art keywords
connection element
pane
electrically conductive
solder material
conductive structure
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.)
Abandoned
Application number
US14/115,091
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English (en)
Inventor
Harald Cholewa
Christoph Degen
Bernhard Reul
Mitja Rateiczak
Andreas Schlarb
Lothar Lesmeister
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.)
Saint Gobain Glass France SAS
Original Assignee
Saint Gobain Glass France SAS
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
Family has litigation
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Application filed by Saint Gobain Glass France SAS filed Critical Saint Gobain Glass France SAS
Assigned to SAINT-GOBAIN GLASS FRANCE reassignment SAINT-GOBAIN GLASS FRANCE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Cholewa, Harald, SCHLARB, ANDREAS, RATEICZAK, MITJA, DEGEN, CHRISTOPH, Lesmeister, Lothar, REUL, BERNHARD
Publication of US20140182932A1 publication Critical patent/US20140182932A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/4007—Surface contacts, e.g. bumps
    • H05K3/4015—Surface contacts, e.g. bumps using auxiliary conductive elements, e.g. pieces of metal foil, metallic spheres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/57—Fixed connections for rigid printed circuits or like structures characterised by the terminals surface mounting terminals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/1028—Thin metal strips as connectors or conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/1031—Surface mounted metallic connector elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/04—Soldering or other types of metallurgic bonding
    • H05K2203/0465—Shape of solder, e.g. differing from spherical shape, different shapes due to different solder pads
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3457—Solder materials or compositions; Methods of application thereof
    • H05K3/3463—Solder compositions in relation to features of the printed circuit board or the mounting process
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3494—Heating methods for reflowing of solder
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • 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
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/49128—Assembling formed circuit to base

Definitions

  • the invention relates to a pane with an electrical connection element and an economical and environmentally friendly method for its manufacture.
  • the invention further relates to a pane with an electrical connection element for vehicles with electrically conductive structures such as, for instance, heating conductors or antenna conductors.
  • the electrically conductive structures are customarily connected to the onboard electrical system via soldered-on electrical connection elements. Due to different coefficients of thermal expansion of the materials used, mechanical stresses occur that strain the panes and can cause breakage of the pane during manufacture and operation.
  • Lead-containing solders have high ductility that can compensate the mechanical stresses occurring between an electrical connection element and the pane by plastic deformation.
  • lead-containing solders have to be replaced by lead-free solders within the EC.
  • the directive is referred to, in summary, by the acronym ELV (End of Life Vehicles).
  • ELV End of Life Vehicles
  • the objective is to ban extremely problematic components from products resulting from the massive increase in disposable electronics.
  • the substances affected are lead, mercury, and cadmium. This relates, among other things, to the implementation of lead-free soldering materials in electrical applications on glass and the introduction of corresponding replacement products.
  • EP 1 942 703 A2 discloses an electrical connection element on panes of vehicles, wherein the difference in the coefficient of thermal expansion of the pane and the electrical connection element is ⁇ 5 ⁇ 10 ⁇ 6 /° C. and the connection element contains predominantly titanium.
  • the excess of solder material flows out from the intermediate space between the connection element and the electrically conductive structure.
  • the excess of solder material causes high mechanical stresses in the glass pane. These mechanical stresses ultimately result in breakage of the pane.
  • titanium is poorly solderable. This results in poor adhesion of the connection element to the pane.
  • the connection element must, moreover, be connected to the onboard electronics via an electrically conductive material, for example, copper, by welding, for instance. Titanium is poorly weldable.
  • the object of the present invention is to provide a pane with an electrical connection element and an economical and environmentally friendly method for its manufacture, whereby critical mechanical stresses in the pane are avoided.
  • the object of the present invention is, further, to provide an improved material for the connection element compared to the prior art, having better availability and better processability, such as solderability, weldability, and cold formability.
  • connection element contains at least chromium, preferably at least a chromium-containing steel, and
  • connection element a layer of a solder material, which electrically connects the connection element to subregions of the electrically conductive structure.
  • the substrate contains, preferably, glass, particularly preferably, flat glass, float glass, quartz glass, borosilicate glass, soda lime glass.
  • the substrate contains polymers, particularly preferably, polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, and/or mixtures thereof.
  • the substrate has a first coefficient of thermal expansion.
  • the connection element has a second coefficient of thermal expansion.
  • the difference between the first and the second coefficient of thermal expansion is ⁇ 5 ⁇ 10 ⁇ 6 /° C. Because of this, better adhesion is obtained.
  • An electrically conductive structure is applied on the pane.
  • An electrical connection element is electrically connected by a soldering material on subregions to the electrically conductive structure.
  • the solder material flows out with an outflow width of ⁇ 1 mm from the intermediate space between the connection element and the electrically conductive structure.
  • the maximum outflow width is preferably less than 0.5 mm and, in particular, roughly 0 mm. This is particularly advantageous with regard to the reduction mechanical stresses in the pane, the adhesion of the connection element, and the reduction in the amount of solder.
  • the maximum outflow width is defined as the distance between the outer edges of the connection element and the point of the solder material crossover, at which the solder material drops below a layer thickness of 50 ⁇ m.
  • the maximum outflow width is measured on the solidified solder material after the soldering process.
  • a desired maximum outflow width is obtained through a suitable selection of solder material volume and vertical distance between the connection element and the electrically conductive structure, which can be determined by simple experiments.
  • the vertical distance between the connection element and the electrically conductive structure can be predefined by an appropriate process tool, for example, a tool with an integrated spacer.
  • the maximum outflow width can even be negative, i.e., pulled back into the intermediate space formed by an electrical connection element and an electrically conductive structure.
  • the maximum outflow width is pulled back in a concave meniscus into the intermediate space formed by the electrical connection element and the electrically conductive structure.
  • a concave meniscus is created, for example, by increasing the vertical distance between the spacer and the conductive structure during the soldering process, while the solder is still fluid.
  • the advantage resides in the reduction of mechanical stresses in the pane, in particular, in the critical region present with a large solder material crossover.
  • the first coefficient of thermal expansion is preferably from 8 ⁇ 10 ⁇ 6 /° C. to 9 ⁇ 10 ⁇ 6 /° C.
  • the substrate is preferably glass that has, preferably, a coefficient of thermal expansion from 8.3 ⁇ 10 ⁇ 6 /° C. to 9 ⁇ 10 ⁇ 6 /° C. in a temperature range from 0° C. to 300° C.
  • the second coefficient of thermal expansion is preferably from 9 ⁇ 10 ⁇ 6 /° C. to 13 ⁇ 10 ⁇ 6 /° C., particularly preferably from 10 ⁇ 10 ⁇ 6 /° C. to 11.5 ⁇ 10 ⁇ 6 /° C. in a temperature range from 0° C. to 300° C.
  • the electrically conductive structure according to the invention has, preferably, a layer thickness of 5 ⁇ m to 40 ⁇ m, particularly preferably from 5 ⁇ m to 20 ⁇ m, very particularly preferably, from 8 ⁇ m to 15 ⁇ m and, most particularly, from 10 ⁇ m to 12 ⁇ m.
  • the electrically conductive structure according to the invention contains, preferably, silver, particularly preferably, silver particles and glass frits.
  • the layer thickness of the solder according to the invention is ⁇ 3.0 ⁇ 10 ⁇ 4 m.
  • the solder material is preferably leadfree, i.e., contains no lead. This is particularly advantageous with regard to the environmental impact of the pane with an electrical connection element according to the invention.
  • Leadfree solder materials typically have less ductility than lead-containing solder materials, such that mechanical stresses between a connection element and a pane can be less well compensated. However, it has been demonstrated that critical mechanical stresses can be avoided by means of the connection element according to the invention.
  • the solder material according to the invention contains, preferably, tin and bismuth, indium, zinc, copper, silver, or compositions thereof.
  • the proportion of tin in the solder composition according to the invention is from 3 wt.-% to 99.5 wt.-%, preferably from 10 wt.-% to 95.5 wt.-%, particularly preferably from 15 wt.-% to 60 wt.-%.
  • the proportion of bismuth, indium, zinc, copper, silver, or compositions thereof in the solder composition according to the invention is from 0.5 wt.-% to 97 wt.-%, preferably 10 wt.-% to 67 wt.-%, whereby the proportion of bismuth, indium, zinc, copper, or silver can be 0 wt.-%.
  • the solder composition according to the invention can contain nickel, germanium, aluminum, or phosphorus at a proportion of 0 wt.-% to 5 wt.-%.
  • the solder composition according to the invention contains, very particularly preferably, Bi40Sn57Ag3, Sn40Bi57Ag3, Bi59Sn40Ag1, Bi57Sn42Ag1, In97Ag3, Sn95.5Ag3.8Cu0.7, Bi67In33, Bi33In50Sn17, Sn77.2In20Ag2.8, Sn95Ag4Cu1, Sn99Cu1, Sn96.5Ag3.5, or mixtures thereof.
  • connection element contains preferably at least 50 wt.-% to 89.5 wt.-% iron, 10.5 wt.-% to 20 wt.-% chromium, 0 wt.-% to 1 wt.-% carbon, 0 wt.-% to 5 wt.-% nickel, 0 wt.-% to 2 wt.-% manganese, 0 wt.-% to 2.5 wt.-% molybdenum, and/or 0 wt.-% to 1 wt.-% titanium.
  • the connection element can contain admixtures of other elements, including vanadium, aluminum, niobium, and nitrogen.
  • connection element can also contain at least 66.5 wt.-% to 89.5 wt.-% iron, 10.5 wt.-% to 20 wt.-% chromium, 0 wt.-% to 1 wt.-% carbon, 0 wt.-% to 5 wt.-% nickel, 0 wt.-% to 2 wt.-% manganese, 0 wt.-% to 2.5 wt.-% molybdenum, 0 wt.-% to 2 wt.-% niobium, and/or 0 wt.-% to 1 wt.-% titanium.
  • the connection element can contain admixtures of other elements, including vanadium, aluminum, and nitrogen.
  • connection element according to the invention contains at least 65 wt.-% to 89.5 wt.-% iron, 10.5 wt.-% to 20 wt.-% chromium, 0 wt.-% to 0.5 wt.-% carbon, 0 wt.-% to 2.5 wt.-% nickel, 0 wt.-% to 1 wt.-% manganese, 0 wt.-% to 1 wt.-% molybdenum, and/or 0 wt.-% to 1 wt.-% titanium.
  • the connection element can contain admixtures of other elements, including vanadium, aluminum, niobium, and nitrogen.
  • connection element can also contain at least 73 wt.-% to 89.5 wt.-% iron, 10.5 wt.-% to 20 wt.-% chromium, 0 wt.-% to 0.5 wt.-% carbon, 0 wt.-% to 2.5 wt.-% nickel, 0 wt.-% to 1 wt.-% manganese, 0 wt.-% to 1 wt.-% molybdenum, 0 wt.-% to 1 wt.-% niobium, and/or 0 wt.-% to 1 wt.-% titanium.
  • the connection element can contain admixtures of other elements, including vanadium, aluminum, and nitrogen.
  • connection element according to the invention contains at least 75 wt.-% to 84 wt.-% iron, 16 wt.-% to 18.5 wt.-% chromium, 0 wt.-% to 0.1 wt.-% carbon, 0 wt.-% to 1 wt.-% manganese, and/or 0 wt.-% to 1 wt.-% titanium.
  • connection element can contain admixtures of other elements, including vanadium, aluminum, niobium, and nitrogen.
  • connection element can also contain at least 78.5 wt.-% to 84 wt.-% iron, 16 wt.-% to 18.5 wt.-% chromium, 0 wt.-% to 0.1 wt.-% carbon, 0 wt.-% to 1 wt.-% manganese, 0 wt.-% to 1 wt.-% niobium, and/or 0 wt.-% to 1 wt.-% titanium.
  • the connection element can contain admixtures of other elements, including vanadium, aluminum, and nitrogen.
  • connection element according to the invention is coated, preferably, with nickel, tin, copper, and/or silver.
  • the connection element according to the invention is particularly preferably provided with an adhesion-promoting layer, preferably made of nickel and/or copper, and, additionally, with a solderable layer, preferably made of silver.
  • the connection element according to the invention is coated, very particularly preferably, with 0.1 ⁇ m to 0.3 ⁇ m nickel and/or 3 ⁇ m to 20 ⁇ m silver.
  • the connection element can be plated with nickel, tin, copper, and/or silver. Nickel and silver improve the current carrying capacity and corrosion stability of the connection element and the wetting with the solder material.
  • connection element according to the invention contains preferably a chromium-containing steel with a proportion of chromium greater than or equal to 10.5 wt.-% and a coefficient of thermal expansion of 9 ⁇ 10 ⁇ 6 /° C. to 13 ⁇ 10 ⁇ 6 /° C.
  • Further alloy components such as molybdenum, manganese, or niobium result in improved corrosion stability or altered mechanical properties, such as tensile strength or cold formability.
  • connection elements made of chromium-containing steel compared to connection elements according to the prior art made of titanium resides in the better solderability. It results from the higher thermal conductivity of 25 W/mK to 30 W/mK compared to the thermal conductivity of titanium of 22 W/mK.
  • the higher thermal conductivity results in a more uniform heating of the connection element during the soldering process, by means of which the pointwise formation of particularly hot sites (“hot spots”) is avoided. These sites are starting points for mechanical stresses and subsequent damage of the pane.
  • Improved adhesion of the connection element to the pane results, in particular with the use of a leadfree solder material that can compensate mechanical stresses less well due to its lower ductility compared to lead-containing solder materials.
  • Chromium-containing steel is, moreover, well weldable. With it, better connecting of the connection element to the onboard electronics via an electrically conductive material, e.g., copper, by welding, is possible. Due to the better cold formability, the connection element can also be better crimped with the electrically conductive material. Chromium-containing steel is, moreover, more available.
  • connection elements made of chromium-containing steel resides in the high rigidity compared to many conventional connection elements. Because of it, the connection element can be less readily deformed, for example, under load from pulling on a wire connected to the connection element. Such a deformation results in a load on the connection between a connection element and an electrically conductive structure via the solder material. In particular, with leadfree solder materials, such a load must be avoided. The load can be less well compensated as a result of the lower ductility of the leadfree solder material compared to lead-containing solder materials, which can lead to damage to the pane.
  • the chromium-containing steel can also be welded, crimped, or glued as a compensation plate on a connection element made, for example, of steel, aluminum, titaniumium, copper.
  • a connection element made, for example, of steel, aluminum, titaniumium, copper.
  • the compensation plate is preferably hat-shaped.
  • the electrical connection element contains, on the surface facing the solder material, a coating that contains copper, zinc, tin, silver, gold, or alloys or layers thereof, preferably silver. This prevents a spreading of the solder material out beyond the coating and limits the outflow width.
  • the electrical connection element can be designed in the form of a bridge with at least two contact surfaces, but also as a connection element with one contact surface.
  • connection elements are, in the plan view, for example, preferably 1 mm to 50 mm long and wide and, particularly preferably 3 mm to 30 mm long and wide and, very particularly preferably 2 mm to 5 mm wide and 12 mm to 24 mm long.
  • the shape of the electrical connection element can form solder depots in the intermediate space of the connection element and the electrically conductive structure.
  • the solder depots and wetting properties of the solder on the connection element prevent the outflow of the solder material from the intermediate space.
  • the solder depots can be rectangular, rounded, or polygonal in design.
  • the distribution of the soldering heat and, thus, the distribution of the solder material during the soldering process can be defined by the shape of the connection element. Solder material flows to the warmest point.
  • the bridge can have a single or double hat shape in order to distribute the heat advantageously in the connection element during the soldering process.
  • the introduction of the energy during the electrical connecting of an electrical connection and an electrically conductive structure occurs preferably by means of punches, thermodes, piston soldering, preferably laser soldering, hot air soldering, induction soldering, resistance soldering, and/or with ultrasound.
  • the object of the invention is further accomplished through a method for production of a pane with at least one connection element, wherein
  • solder material is applied on the contact surfaces of the connection element as a platelet with a fixed layer thickness, volume, shape, and arrangement,
  • connection element with the solder material is arranged on the electrically conductive structure
  • connection element is soldered to the electrically conductive structure.
  • connection elements preferably as a platelet with a fixed layer thickness, volume, shape, and arrangement on the connection element.
  • connection element can, for example, be welded or crimped to a sheet, a braided wire, a mesh made, for example, of copper and connected to the onboard electrical system.
  • connection element is preferably used in heated panes or in panes with antennas in buildings, in particular, in automobiles, railroads, aircraft, or watercraft.
  • connection element serves to connect the conducting structures of the pane to electrical systems that are arranged outside the pane.
  • the electrical systems are amplifiers, control units, or voltage sources.
  • a preferred embodiment of the invention is a pane with a connection element, wherein the contact surface of the connection element has no corners.
  • the electrical connection element is connected over its entire surface to a subregion of the electrically conductive structure via one contact surface.
  • the contact surface can have an oval, preferably an elliptical, and, in particular, a circular structure.
  • the contact surface can have a convex polygonal shape, preferably a rectangular shape, with rounded corners.
  • the rounded corners have a radius of curvature of r>0.5 mm, preferably of r>1 mm.
  • FIG. 1 a perspective view of a first embodiment of the pane according to the invention
  • FIG. 1 a a perspective view of an alternative embodiment of the pane according to the invention
  • FIG. 2 a cross-section A-A′ through the pane of FIG. 1 ,
  • FIG. 3 a cross-section through an alternative pane according to the invention
  • FIG. 4 a cross-section through another alternative pane according to the invention
  • FIG. 5 a cross-section through another alternative pane according to the invention
  • FIG. 6 a perspective view of an alternative embodiment of the pane according to the invention.
  • FIG. 7 a cross-section B-B′ through the pane of FIG. 6 .
  • FIG. 8 a cross-section C-C′ through the pane of FIG. 1 .
  • FIG. 9 a cross-section D-D′ through the pane of FIG. 1 a
  • FIG. 9 a a cross-section through an alternative embodiment of the pane according to the invention.
  • FIG. 9 b a plan view of an alternative embodiment of the connection element
  • FIG. 10 a plan view of an alternative embodiment of the of the pane according to the invention with an elliptical connection element
  • FIG. 11 a cross-section E-E′ through the pane of FIG. 10 .
  • FIG. 12 a cross-section through an alternative pane according to the invention
  • FIG. 13 a cross-section through another alternative pane according to the invention.
  • FIG. 14 a plan view of an alternative embodiment of the connection element
  • FIG. 15 a plan view of another alternative embodiment of the connection element
  • FIG. 16 a plan view of another alternative embodiment of the connection element
  • FIG. 17 a side view of the connection element of FIG. 16 .
  • FIG. 18 a cross-section through another alternative pane according to the invention with a curved connection element
  • FIG. 19 a perspective view of another alternative embodiment of the connection element.
  • FIG. 20 a detailed flow chart of the method according to the invention.
  • FIG. 1 , FIG. 2 , and FIG. 8 show, in each case, a detail of a heatable pane 1 according to the invention in the region of the electrical connection element 3 .
  • the pane 1 is a 3-mm-thick thermally prestressed single-pane safety glass made of soda lime glass.
  • the pane 1 has a width of 150 cm and a height of 80 cm.
  • An electrically conductive structure 2 in the form of a heating conductor structure 2 is printed on the pane 1 .
  • the electrically conductive structure 2 contains silver particles and glass frits.
  • the electrically conductive structure 2 is widened to a width of 10 mm and forms a contact surface for the electrical connection element 3 .
  • solder material 4 is applied, which effects a durable electrical and mechanical connection between the electrical connection element 3 and the electrically conductive structure 2 .
  • the solder material 4 contains 57 wt.-% bismuth, 40 wt.-% tin, and 3 wt.-% silver.
  • the solder material 4 is arranged through a predefined volume and shape completely between the electrical connection element 3 and the electrically conductive structure 2 .
  • the solder material 4 has a thickness of 250 ⁇ m.
  • the electrical connection element 3 is made from steel of the material number 1.4509 in accordance with EN 10 088-2 (ThyssenKrupp Nirosta® 4509) with a coefficient of thermal expansion of 10.0 ⁇ 10 ⁇ 6 /° C.
  • the electrical connection element 3 is designed in the form of a bridge and has a width of 4 mm and a length of 24 mm.
  • Steel of the material number 1.4509 in accordance with EN 10 088-2 has good cold forming properties and good welding properties with all methods except gas welding.
  • the steel is used for construction of sound suppressor systems and exhaust gas detoxification systems and is particularly suited for that due to its scaling resistance to more than 950° C. and corrosion resistance against the stresses occurring in the exhaust gas system.
  • other chromium-containing steels can be used for the connection element 3 .
  • One alternative particularly suitable steel is, for example, material number 1.4016 in accordance with EN 10 088-2.
  • FIG. 1 a and FIG. 9 depict, in each case, a detail of an alternative embodiment of the heatable pane 1 according to the invention in the region of the electrical connection element 3 .
  • the region 7 of the connection element 3 in the form of a bridge is formed at an angle to the surface of the pane.
  • the height-adapting region 7 of the connection element 3 in the form of a bridge does not necessarily have to be configured as a flat segment, but can, instead, also be curved.
  • the angle between the surface of the substrate 1 and each of the tangential planes of the surfaces of the region 7 facing the substrate 1 is preferably less than 90°, particularly preferably between 2° and 75°, very particularly preferably between 5° and 50°.
  • FIG. 3 depicts, in continuation of the exemplary embodiment of FIGS. 1 and 2 , an alternative embodiment of the connection element 3 according to the invention.
  • the electrical connection element 3 is provided on the surface facing the solder material 4 with a silver-containing coating 5 . This prevents spreading of the solder material out beyond the coating 5 and limits the outflow width b.
  • an adhesion-promoting layer made, for example, of nickel and/or copper, can be located between the connection element 3 and the silver-containing layer 5 .
  • the outflow width b of the solder material 4 is less than 1 mm. No critical mechanical stresses are observed in the pane 1 due to the arrangement of the solder material 4 .
  • the connection of the pane 1 to the electrical connection element 3 via the electrically conductive structure 2 is durably stable.
  • FIG. 4 depicts, in continuation of the exemplary embodiment of FIGS. 1 and 2 , another alternative embodiment of the connection element 3 according to the invention.
  • the electrical connection element 3 contains, on the surface facing the solder material 4 , a recess with a depth of 250 ⁇ m that forms a solder depot for the solder material 4 . It is possible to completely prevent outflow of the solder material 4 from the intermediate space.
  • the thermal stresses in the pane 1 are noncritical and a durable electrical and mechanical connection is provided between the connection element 3 and the pane 1 via the electrically conductive structure 2 .
  • FIG. 5 depicts, in continuation of the exemplary embodiment of FIGS. 1 and 2 , another alternative embodiment of the connection element 3 according to the invention.
  • the electrical connection element 3 is bent upward on the edge regions.
  • the height of the upward bend of the edge region of the glass pane 1 is a maximum of 400 ⁇ m. This forms a space for the solder material 4 .
  • the predefined solder material 4 forms a concave meniscus between the electrical connection element 3 and the electrically conductive structure 2 . It is possible to completely prevent outflow of solder material 4 from the intermediate space.
  • the outflow width b at roughly 0, is less than zero, largely because of the meniscus formed.
  • the thermal stresses in the pane 1 are noncritical, and a durable electrical and mechanical connection is provided between the connection element 3 and the pane 1 via the electrically conductive structure 2 .
  • FIG. 6 and FIG. 7 depict, in each case, a detail of another embodiment of the pane 1 according to the invention with connection element 3 in the form of a bridge.
  • the connection element 3 contains an iron-containing alloy with a coefficient of thermal expansion of 8 ⁇ 10 ⁇ 6 /° C.
  • the material thickness is 2 mm.
  • hat-shaped compensation members 6 are applied with chromium-containing steel of the material number 1.4509 in accordance with EN 10 088-2 (ThyssenKrupp Nirosta® 4509).
  • the maximum layer thickness of the hat-shaped compensation members 6 is 4 mm.
  • the compensation members By means of the compensation members, it is possible to adapt the coefficients of thermal expansion of the connection element 3 to the requirements of the pane 1 and of the solder material 4 .
  • the hat-shaped compensation members 6 result in improved heat flow during the production of the solder connection 4 .
  • the heating occurs primarily in the center of the contact surface 8 .
  • the thermal stresses in the pane 1 are noncritical, and a durable electrical and mechanical connection is provided between the connection element 3 and the pane 1 via the electrically conductive structure 2 .
  • FIG. 9 a depicts, in continuation of the exemplary embodiment of FIGS. 1 a and 9 , an alternative embodiment of the connection element 3 according to the invention.
  • a contact bump 12 is arranged on each of the surfaces of the flat foot region of the connection element 3 facing away from the substrate 1 opposite the contact surface 8 .
  • the contact bumps 12 are formed, in the embodiment shown, as hemispheres and have a height of 2.5 ⁇ 10 ⁇ 4 m and a width of 5 ⁇ 10 ⁇ 4 m.
  • the centers of the contact bumps 12 are arranged roughly in the geometric center of the surfaces of the flat foot regions of the connection element 3 facing away from the substrate 1 .
  • the contact bumps 12 enable an advantageously improved soldering of the connection element to the electrically conductive structure 2 .
  • electrodes whose contact side is flat can be used. The electrode surface is brought into contact with the contact bump 12 , with the contact region between the electrode surface and the contact bump 12 forming the soldering point.
  • the position of the soldering point is thus determined preferably by the point on the convex surface of the contact bump 12 that has the greatest vertical distance from the surface of the substrate 1 .
  • the position of the soldering point is independent of the position of the solder electrode on the connection element 3 . That is particularly advantageous with regard to a reproducible, uniform heat distribution during the soldering process.
  • the heat distribution during the soldering process is determined by the position, the size, the arrangement, and the geometry of the contact bump 12 .
  • the contact bump 12 can be shaped, for example, as a segment of a rotational ellipsoid or as a cuboid, with the surface of the cuboid turned away from the substrate curved convexly.
  • the contact bumps 12 preferably have a height of 0.1 mm to 2 mm, particularly preferably of 0.2 mm to 1 mm.
  • the length and width of the contact bumps 12 is preferably between 0.1 and 5 mm, very particularly preferably between 0.4 mm and 3 mm.
  • Spacers 11 are arranged on each of the contact surfaces 8 .
  • Three spacers 11 for example, of which one spacer 11 is discernible in the cross-section depicted in the figure, can be arranged on each contact surface 8 .
  • the spacers 11 are shaped as hemispheres and have a height of 2.5 ⁇ 10 ⁇ 4 m and a width of 5 ⁇ 10 ⁇ 4 m.
  • the spacers 11 can, in alternative embodiments, also be designed as a cube, as a pyramid, or as a segment of a rotational ellipsoid and preferably have a width of 0.5 ⁇ 10 ⁇ 4 m to 10 ⁇ 10 ⁇ 4 m and a height of 0.5 ⁇ 10 ⁇ 4 m to 5 ⁇ 10 ⁇ 4 m, particularly preferably of 1 ⁇ 10 ⁇ 4 m to 3 ⁇ 10 ⁇ 4 m.
  • the contact bumps 12 and spacers 11 can, in an advantageous embodiment, be formed in one piece with the connection element 3 .
  • the contact bumps 12 and the spacers 11 can, for example, be formed by reshaping a connection element 3 with a flat surface in the initial state on the surface, for example, by stamping or deep drawing. In the process, a corresponding depression can be created on the surface of the connection element 3 opposite the contact bump 12 or the spacer 11 .
  • solder material 4 By means of the contact bumps 12 and the spacers 11 , a homogeneous, uniformly thick, and uniformly fuzed layer of the solder material 4 is obtained. Thus, mechanical stresses between the connection element 3 and substrate 1 can be reduced. This is particularly advantageous with the use of a leadfree solder material that can compensate mechanical stresses less well due to its lower ductility compared to lead-containing solder materials.
  • FIG. 9 b depicts, in continuation of the exemplary embodiment of FIGS. 1 a and 9 , a plan view of an alternative embodiment of the connection element 3 according to the invention.
  • the connection element 3 is designed in the form of a bridge and has a cross-section in accordance with FIG. 9 .
  • the boundaries between the flat subsections are indicated in the plan view by dotted lines.
  • the flat foot regions of the connection element 3 on the bottom of which the contact surfaces 8 are arranged, have a width of 8 mm and are twice as wide as the bridge region between the foot regions. It has surprisingly been demonstrated that foot regions that are designed wider than the bridge region result in a reduction of mechanical stresses in the pane 1 .
  • the width of the foot regions is preferably from 150% to 300% of the width of the bridge region.
  • FIG. 10 and FIG. 11 show, in each case, a detail of another embodiment of the heatable pane 1 according to the invention in the region of the electrical connection element 3 .
  • An outflow of the solder material 4 from the intermediate space between the electrical connection element 3 and the electrically conductive structure 2 , which exceeds a layer thickness t of 50 ⁇ m, is observed to a maximum outflow width of b 0.5 mm.
  • the electrical connection element 3 is made from steel of the material number 1.4509 in accordance with EN 10 088-2 (ThyssenKrupp Nirosta® 4509).
  • the electrical connection element 3 is designed with an elliptical base surface.
  • the length of the major axis is 12 mm; the length of the minor axis, 5 mm.
  • connection element 3 The material thickness of the connection element 3 is 0.8 mm. No critical mechanical stresses are observed in the pane 1 due to the arrangement of the solder material 4 , predefined by the connection element 3 and the electrically conductive structure 2 .
  • the connection of the pane 1 to the electrical connection element 3 via the electrically conductive structure 2 is durably stable.
  • FIG. 12 shows, in continuation of the exemplary embodiment of FIGS. 10 and 11 , an alternative embodiment of the connection element 3 according to the invention.
  • the electrical connection element 3 is provided on the surface facing the solder material 4 with a silver-containing coating 5 . This prevents spreading of the solder material out beyond the coating 5 and limits the outflow width b.
  • the outflow width b of the solder material 4 is less than 1 mm. No critical mechanical stresses are observed in the pane 1 due to the arrangement of the solder material 4 .
  • the connection of the pane 1 to the electrical connection element 3 via the electrically conductive structure 2 is durably stable.
  • FIG. 13 shows, in continuation of the exemplary embodiment of FIGS. 10 and 11 , another alternative embodiment of the pane 1 according to the invention with a connection element 3 with an elliptical base surface.
  • the connection element 3 contains an iron-containing alloy with a coefficient of thermal expansion of 8 ⁇ 10 ⁇ 6 /° C.
  • the material thickness is 2 mm.
  • a hat-shaped compensation member 6 is applied with chromium-containing steel of the material number 1.4509 in accordance with EN 10 088-2 (ThyssenKrupp Nirosta® 4509).
  • the maximum layer thickness of the hat-shaped compensation member 6 is 4 mm.
  • the compensation member By means of the compensation member, it is possible to adapt the coefficients of thermal expansion of the connection element 3 to the requirements of the pane 1 and of the solder material 4 .
  • the hat-shaped compensation members 6 results in improved heat flow during the production of the solder connection 4 .
  • the heating occurs primarily in the center of the contact surface 8 .
  • the thermal stresses in the pane 1 are noncritical, and a durable electrical and mechanical connection is provided between the connection element 3 and the pane 1 via the electrically conductive structure 2 .
  • FIG. 14 depicts a plan view of an alternative embodiment of the connection element 3 according to the invention.
  • the connection element 3 is designed as a rectangle and has a width of 5 mm and a length of 14 mm.
  • the corners of the rectangle are in each case rounded with a circular segment with a radius curvature r of 1 mm, for example.
  • a connection cable 18 is welded via a welding region 17 to the connection element 3 .
  • the welding region 17 has a width of 3 mm and a length of 6 mm.
  • the connection cable 18 is a woven cable made of thin, tin-plated copper wires. Stranded wire cables or wires can also be used as the connection cable 18 .
  • connection element 3 can also be designed as a one-part or multi-part clamping sleeve or crimp element.
  • FIG. 15 depicts a plan view of another alternative embodiment of the connection element 3 according to the invention.
  • the connection element 3 is designed as a rectangle, with the two short sides of the rectangle designed as semicircles.
  • the connection element has a width of 5 mm and a length of 14 mm.
  • the welding region 17 has a width of 3 mm and a length of 6 mm.
  • FIG. 16 and FIG. 17 depict another alternative embodiment of the connection element 3 according to the invention with a connecting tab 19 .
  • the contact surface 8 of the connection element 3 is designed as a circle.
  • the radius of the circle is 4 mm.
  • the connecting tab 19 is connected via a welding region 17 to a connection cable 18 .
  • the connecting tab 19 can also be designed as a flat plug as well as a clamping sleeve or crimp connector.
  • the connecting tab 19 has, in this embodiment, two notches 20 , 20 ′. These notches 20 , 20 ′ serve to reduce the material of the connecting tab 19 . This results in a spring effect and thus to the mitigation of forces that are transferred via the connection cable 18 to the solder contact.
  • FIG. 18 depicts a cross-section through another alternative embodiment of a connection element 3 according to the invention.
  • the connection element 3 has a curve 23 in the center. In the region of the curve 23 , the solder material 4 is thickened.
  • FIG. 19 depicts a perspective view of an alternative embodiment of the connection element 3 according to the invention.
  • the connection element 3 is designed in the form of a bridge and has a first and second flat foot region with, for example, a length of 7 mm and a width of 5 mm, on the bottom of which the two contact surfaces 8 are arranged.
  • the flat foot regions are connected to each other via a bridge region that comprises a flat section with, for example, a length of 12 mm and a width of 10 mm.
  • the flat section of the bridge region has a production-related indentation 10 .
  • the indentation 10 runs all the way to the edge of the flat section of the bridge region, to which the first foot region is connected via a height-adapting transition region 7 .
  • the indentation 10 corresponds in shape and size to the section of the connection element 3 from the first foot region and the height-adapting transition region 7 .
  • the contact surfaces 8 have a rectangular shape, with the two corners turned away from the bridge region beveled in each case. By means of the beveling, angles that are too small, in particular 90°-angles along the surrounding side edges of the contact surfaces 8 are avoided. It has been demonstrated that mechanical stresses in the pane can thus be reduced.
  • the connection element 3 includes a plug connector 9 arranged on the bridge region.
  • the plug connector 9 is connected, on the side edge of the flat section of the bridge region facing the first foot region, to the flat section of the bridge region.
  • the plug connector 9 is designed as a standardized tab connector to which the coupling of a connection cable (not shown) to the onboard electronics, for instance, can be attached.
  • connection element 3 provides, at the same time, a convenient interface for electrical contacting (plug connector 9 ).
  • the foot regions, the bridge region, and the plug connector 9 are formed in one piece.
  • the connection element 3 is provided in a flat initial state, in which the sections provided as the first foot region and height-adapting transition region 7 are arranged inside the indentation 10 . In the initial state, the plug connector 9 is arranged in the same plane as the flat section of the bridge region.
  • the region provided as the first foot region and the height-adapting transition region 7 can be separated from the flat section of the bridge region, for example, by punching, laser beam machining, or waterjet machining, with a connection remaining between the height-adapting transition region 7 and the flat section of the bridge region via the connecting edge.
  • the plug connector 9 is bent around the connecting line between the plug connector 9 and the flat section of the bridge region into the position depicted, with the surface that faces upward in the initial state then facing the bridge region.
  • the first foot region and the height-adapting transition region 7 are bent above the connecting line between the height-adapting transition region 7 and the flat section of the bridge region into the position depicted, with the surface that faces upward in the initial state then forming the bottom side of the first foot region and the height-adapting transition region 7 .
  • the indentation 10 is formed by the bending of the first foot region.
  • the second foot region and the corresponding height-adapting transition region 7 are also bent from the flat initial state into the position depicted.
  • FIG. 20 depicts in detail a method according to the invention for manufacture of a pane 1 with an electrical connection element 3 .
  • An example of the method according to the invention for manufacture of a pane with an electrical connection element 3 is presented there.
  • As the first step it is necessary to portion the solder material 4 according to shape and volume.
  • the portioned solder material 4 is arranged on the contact surfaces 8 of the electrical connection element 3 .
  • the electrical connection element 3 is arranged with the solder material 4 on the electrically conductive structure 2 .
  • a durable connection of the electrical connection element 3 to the electrically conductive structure 2 and, thus, to the pane 1 takes place through the input of energy.
  • Test specimens were produced with the pane 1 (thickness 3 mm, width 150 cm, and height 80 cm), the electrically conductive structure 2 in the form of a heating conductor structure, the electrical connection element 3 according to FIG. 1 , the silver layer 5 on the contact surfaces 8 of the connection element 3 , and the solder material 4 .
  • the material thickness of the connection element 3 was 0.8 mm.
  • the contact surface 8 of the connection element 3 had a width of 4 mm and a length of 4 mm.
  • the solder material 4 was applied in advance as a platelet with fixed layer thickness, volume, and shape on the contact surface 8 of the connection element 3 .
  • the connection element 3 was applied with the solder material 4 applied on the electrically conductive structure 2 .
  • the dimensions and compositions of the electrical connection element 3 , the silver layer 5 on the contact surfaces 8 of the connection element 3 , and the solder material 4 are found in Table 1. No critical mechanical stresses were observed in the pane 1 due to the arrangement of the solder material 4 , predefined by the connection element 3 and the electrically conductive structure 2 .
  • the connection of the pane 1 to the electrical connection element 3 via the electrically conductive structure 2 was durably stable.
  • connection element 3 of FIG. 1 a Due to the capillary effect, the connection element 3 of FIG. 1 a exhibited better adhesion between the connection element 3 and the substrate 1 . Due to the arrangement of the solder material 4 , no critical mechanical stresses were observed in the pane 1 . The connection of the pane 1 to the electrical connection element 3 via the electrically conductive structure 2 was durably stable.
  • connection element 3 was 100 wt.-% titanium.
  • the connection element 3 thus had lower thermal conductivity, a lower coefficient of thermal expansion, and a smaller difference of the coefficients of thermal expansion between connection element 3 and substrate 1 .
  • the dimensions and components of the electrical connection element 3 , the metal layer on the contact surfaces 8 of the connection element 3 and the solder material 4 are found in Table 2.
  • the connection element 3 was soldered to the electrically conductive structure 2 in accordance with conventional methods by means of the solder material 4 .
  • connection Titanium 100 element 3 CTE (coefficient of thermal expansion) 8.80 (10 ⁇ 6 /° C. for 0° C.-100° C.) Difference between CTE of the connection 0.5 element and substrate (10 ⁇ 6 /° C.
  • panes according to the invention with glass substrates 1 and electrical connection elements 3 according to the invention have better stability against sudden temperature differences. This result was unexpected and surprising for the person skilled in the art.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Resistance Heating (AREA)
  • Details Of Aerials (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
  • Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
  • Surface Heating Bodies (AREA)
  • Laminated Bodies (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Non-Insulated Conductors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
US14/115,091 2011-05-10 2012-04-17 Disk having an electric connecting element Abandoned US20140182932A1 (en)

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EP11165501.5 2011-05-10
EP11165506.4 2011-05-10
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