Showing papers on "Conductive ink published in 1991"

Conductive ink composition and method of forming a conductive thick film pattern

Abstract: A method of forming a conductive thick film pattern comprises the steps of filling grooves of an intaglio with a conductive ink, transferring the conductive ink in the grooves onto a blanket of which surface is coated with an elastic material, transferring and printing a conductive thick film pattern transferred on the blanket onto a substrate, firing the conductive pattern to scatter the organic matter, and sintering the conductive pattern. A conductive ink comprises conductive metal powder, glass frit, transition metal oxide, dispersing agent, and vehicle containing an organic binder comprising at least one of poly-iso-butyl methacrylate, poly-iso-propyl methacrylate, polymethyl methacrylate, poly-4-fluoroethylene, and poly-α-methyl styrene.

Method for forming filled holes in multi-layer integrated circuit packages

Abstract: In an apparatus for forming filled via holes in ceramic substrates or wafers, upper and lower masks or dies each having at least one hole are clamped between opposing injection and base members with a wafer placed between the masks. The injection member has an injection chamber containing conductive ink material which is connected with the or each hole in the upper mask. An injection device such as a piston is used to force ink out of the chamber through the or each hole in the adjacent mask, punching one or more plugs of wafer material out of the wafer and replacing each punched-out plug with ink material, the plugs being pushed into the or each aligned hole in the other mask, which acts as a stripper. In one version, each die has a single hole and filled holes are formed sequentially at successive points on the wafer. In an alternative, each die or mask has a plurality of holes and the filled holes are formed simultaneously.

Manufacture of printed wiring board

Abstract: PURPOSE:To provide a printed wiring board wherein its mounting area is large and its cost is low by a method wherein a through hole which makes both faces of the wiring board conductive is formed in the same place as a land for mounting use. CONSTITUTION:A conductive ink 5 is buried in a through hole 4 which has been made in a double-sided copper-clad laminated board; it is hardened under a prescribed condition; after that, an electrolytic copper plating operation is executed to both faces of the double-sided copper-clad laminated board 1; copper-plated layers 6 are formed; after that, a circuit in which a land 7 for component mounting use is formed directly above the hardened conductive ink 5 is drawn on the copper-plated layer by using a dry film or an ink for circuit formation use; a circuit is formed by an etching operation or the like.

Display device for domestic electrical appliances

Abstract: An electroluminescent display device is adapted for domestic electrical appliances, for indicating the working programs which can be set by way of selector members provided in the control panel of such machines. The display comprises at least one support screen of transparent material, to whose internal surface are successively applied by means of screen printing in superposed relationship a first layer of conductive ink containing indium oxide and which operates as a positive electrode, a second layer electroluminescent material, preferably zinc sulphide doped with salts of transition metals such as copper and manganese, a third layer of conductive ink containing silver or graphite and which operates as a negative electrode, and a fourth layer of electrically insulating material such as insulating varnish or ink.

Production of circuit board

Abstract: PURPOSE:To manufacture a circuit board on which a high-density wiring pattern that cannot be provided only by printing is formed. CONSTITUTION:Among the wiring patterns to be formed on an insulating board 1, for a pattern 2a which ensures wiring width and intervals by printing, the pattern is formed by printing using conductive ink. For a pattern that cannot ensure the wiring width and interval by printing, the pattern is formed by printing by conductive ink as a solid pattern 2b with the pattern 2a or as an approximate pattern which is approximate to the wiring pattern to be formed. Then, the solid pattern 2b or the approximate pattern is irradiated with excimer laser beams 4 through a mask 3 which has the wiring pattern to be formed. Thus, the conductive ink is partially removed and the desirable wiring pattern is formed.

Manufacture of wiring device

Abstract: PURPOSE:To provide a wiring device manufacturing device which can easily manufacture a wiring device having a multilayered structure, such as a wiring model for evaluating a semiconductor integrated circuit device, etc., in a short time. CONSTITUTION:At the time of manufacturing a wiring model 10 having a multilayered structure, a multilayer interconnection structure composed of conductive layers 11, 13, and 15 and insulating layers 12 and 14 is formed by selectively sticking conductive ink A and insulating ink B to the surface of a wiring board 1 in accordance with a desired design pattern.

Printed circuit board

Abstract: PURPOSE: To form patterned conductive circuit elements having a resistivity of less than 0.05ohms/cm by applying ultrasonic ray pulses to harden the ultraviolet setting resin components of an ultraviolet setting ink. CONSTITUTION: Desired circuit pattern is printed on a nonconductive board with an ultraviolet setting ink and exposed to an ultraviolet ray at a range of 360mm to 420nm such that 5-8 times of this ray for 1/2sec. are repeatedly applied with non-exposure time of about 2-3sec. The ink hardens to shrink the conductive ink film in depth uniformly over the entire depth thereof. This moves grains so as to mutually approach. Thus it is possible to provide a low resistance and form patterned conductive circuit elements capable of carrying a more high operating current.

Inspection device for semiconductor device

Abstract: PURPOSE:To notify a worker that conductive ink has collected at the top of a lead supporting tube, by attaching a sensor, consisting of conductive material, to the top of the external wall of a lead supporting tube through an insulator, and applying voltage between the lead supporting tube and the sensor so as to detect the leak currents. CONSTITUTION:A metallic tube 14 is attached onto the insulator 13 at the top of a lead supporting tube 2, and the metallic lead supporting tube 2 and the metallic tube 14 are connected electrically, and buzzer 15 is attached to it. That is, when the lump of ink has formed at the top of the lead supporting tube 2, the metallic lead supporting tube 2 and the metallic tube 14 are connected electrically through ink 9, and a buzzer 15 operates. Hereby, it can be confirmed that the spherical lump of ink is formed at the top of the lead supporting tube 2, and by eliminating this, the stain by ink of a good semiconductor device can be prevented.

Signal transmitting apparatus reacting to solvent

Abstract: PURPOSE: To detect leakage of solvent by dissolving a non-conductive carrier when a solvent is added, moving a conductive material between conductors and making a short circuit therebetween. CONSTITUTION: Conductive tapes 11, 12 and insulating tapes 13, 14 are mutually overlapped to be wound around a core 10. A fifth layer 15 is the composite layer of a conductive strip 16 embedded in a plastic material 17, and coated with a printing conductive coating 19. The coating is composed of lines 20 printed with conductive ink and arranged in parallel at a plurality of intervals, and electric conductive paths for transmitting a signal are formed. The conductive ink is composed of a conductive filler carrier in a carrier medium dissolved in solvent. Consequently, if the coating is brought into contact with solvent, printed lines will be dissolved or floated in a space. As a result, conductive particulate constituting it is moved in the conductive paths of the printed lines and the interrupted, and a short circuit is completed between the neighboring printed lines and the conductors 16.

DX re-rating labels for 35mm film cassettes

Abstract: A non-conductive flexible label has a printed or painted DX code pattern in a conductive ink or paint on the upper side. Alternatively a highly conductive metalized label 2 is printed or painted with the required DX code with a non-conductive ink or paint 1. The underside of the label is of a sticky substance or a magnetic strip allows the label to be attached temporarily or permanently to the side of a 35mm film cassette (4) covering the existing DX code (5), so altering the information read by the cameras DX code sensors. The DX decoding sensor pins will, in a 35mm camera if fitted with sensors, set a new or different ISO film speed.

Tubular pen used as writing implement - has buffer chamber between front end of bore and rear end of tube which is checked for ink level by regulator

Abstract: The tube pen front tip ink tube is entered by a cleaning wire fixed to the front of a drop weight which reciprocatesa axially within limits in an inside bore and is connected to an ink reservoir. A buffer chamber between the front end of the bore and the rear end of the tube is checked for ink level by a device which also actuates ink feed from bore to chamber to restore correct level. The buffer chamber (15) should be centrally symmetrical to the centre axis of the ink tube (4) and its inner and outer walls (16, 17) diverge to the rear. The front part of the chamber connects to tube and inside bore (7). The diverging rear parts of the walls are electroconducting and each connected (23, 24) to a regulating circuit and thus joined by conductive ink. The ink feed (25) is activated whenever the circuit connections (23, 24) are broken. USE/ADVANTAGE - Drawing offices, draughting implements. Buffer chamber ink status accurately reported using electrical connection proof'inSt n uS nlS tC. (7p DW.NO.1/

Production of printing head

Abstract: PURPOSE:To form heating resistor layers accurately without the possibility of contacting with each other even at a smaller pitch by a method wherein a heating conductive ink adheres within an open part of a resist layer, the resist layer is released but the conductive ink in the open part remains, and the heating resistor layer made of the conductive ink is formed in a gap part of a wiring lead. CONSTITUTION:A heating conductive ink 16, such as a carbon ink, is printed along an open part 15 of a photo resist 12. The conductive ink 16 can be printed by charging a sufficient amount of the ink 16 in the open part 15 of the photo resist 12. Thereafter, the photo resist 12 is released with a release liquid. Then, the unwanted conductive ink 16 adhering on the top surface of the photo resist 12 is simultaneously removed together with the photo resist 12. However, the conductive ink 16 adhering in the open part 15 remains intact. This remaining conductive ink 16 is dried and cured, whereby a heating resistor layer 17 made of the conductive ink 16 is formed in a gap part 7 of a wiring lead 4. Because the heating resistor layer 7 is formed by charging the conductive ink 16 in each of the open parts 15, the contact of adjacent heating resistor layers 17 with each other can be prevented.

Printed circuit device and manufacture thereof

Abstract: PURPOSE: To configure an inductor and a transformer directly on a substrate material by making a plurality of through holes through a substrate having permeability higher than free space permeability and forming a conduction path by applying conductive ink to the opposite surfaces and in the opening through a thick film process. CONSTITUTION: A substrate 201 is made of a ferromagnetic material and a plurality of small diameter holes 203 are drilled closely each other by means of a laser. The substrate 201 is formed, on the upper surface thereof, with a conductive trace 204 and on the upper and lower surfaces thereof, with a conduction path 205 by screen printing conductive ink. The ink is also screen printed on the holes 203 and fed into the holes 203 through vacuum processing in order to coat the inside thereof with the ink and then the ink is exposed to a desired temperature profile and hardened thus forming an inductor. Similarly, a substrate 301 having a plurality of holes is screen printed, on the upper and lower surfaces thereof, with conductive ink to form conductors 304, 305 and then the inside of the holes 303 are coated with the ink and the ink is eventually hardened thus forming a transformer having a relatively high mutual inductance between two clamped inductors.

Nozzle of ink jet printer head

Abstract: PURPOSE:To concentrate the flow of an electric current on the ink of a specific part to realize an efficient ink fly by a method wherein a pulse voltage is applied between electrodes existing across an insulating body coaxially in a nozzle, whereby an electric current flowing conductive ink is limited on the center of the nozzle CONSTITUTION:When a pulse voltage is applied between an electrode A3 and an electrode B4, an electric current 6 flows through conductive ink 5, and the current 6 has the highest current density at the part of an insulating body 7a Just after the current 6 starts flowing, the conductive ink 5 itself generates heat to start evaporating, and bubble is generated The current 6 is more concentrated because the bubble itself has the same role as that of a throttle as generated, and the bubble grows Simultaneously with the growth of the bubble, the conductive ink 5 existing forward of the position of the bubble is accelerated toward the opening of a nozzle 1 At least a part of the ink is cause to fly as an ink drop by a force exceeding a surface tension Simultaneously with the ink jet, the applied voltage is reduced to 0, and the bubble stops growing Immediately after that, the bubble is rapidly extinguished by the heat release to the conductive ink 5 thereabouts At the same time, new conductive ink 5 is supplied from an ink tank 2, and a device returns to a standby state

Method of and apparatus for reclaiming inked sheets

Abstract: A method of and apparatus for reclaiming an inked sheet which includes a conductive ink layer formed on an insulating supporter, and in which the ink layer has transferred parts and untransferred parts remaining without being transferred; comprising the fact that an electrode (10 in Fig. 1) is brought into contact with the insulating supporter (2), that conductive ink (7) to be introduced into the transferred parts (4) is conveyed to a position which confronts the electrode (10) with the inked sheet (1) intervening therebetween and which does not contact with the inked sheet (1), that a predetermined voltage is applied between the electrode (10) and the conductive ink (7), thereby to fly and supply the conductive ink (7) into each transferred part (4), and that the supplied conductive ink (7) in each transferred part (4) is fixed (14). Thus, the conductive ink (7) can be supplied without contacting with the inked sheet (1), and the supply of the conductive ink (7) need not be synchronized with the conveyance of the inked sheet (1).

Jet print head

Abstract: A jet print head (1) comprises a chamber (2) for current conductive ink (6) and an ink discharge port (3) to express ink onto the information carrier (4). The discharge port (3) has a group array of parallel rows of orifices (5) obtained in the form of flow-through openings communicating with the chamber (2) and represented by a multilaminate structure established on an underlay (8) and having layers forming electrodes (7) which are common for each row of orifices (5), and individual electrodes (10) for every orifice (5), produced as an integral whole together with the current conductive bar (12), and a magnetic layer (9) placed between them. The energy signal pulse sent to the electrodes (7,10) creates electro-dynamic force by virtue of which an ink drop is discharged from the given capillary tube to fall onto the information carrier (4).

Manufacture of metal fine particles

Abstract: PURPOSE:To manufacture metal fine particles as electric conductive filler for maintaining the good electric conductivity over long period by dissolving and heating metal nitrate in a reacting solvent dissolving shape improving agent composed of organic acid. CONSTITUTION:At the time of manufacturing the metal fine particles as the electric conductive filler used to an electric conductive ink, coating for shielding electromagnetic wave and plastic, the metal nitrate having excellent electric conductivity of Cu, etc., is added in the reacting solvent of polyhydric alcohol, etc., incorporating >= 4% of hydroxyl group of glyceline, erythritol dissolving the organic acid of citric acid, etc., at 10 - 50 wt% ratio as the shape improving agent for metal powder and heated to about 200 deg.C and left as it is. Since Cu dissolved in the reacting solvent is precipitated in a fine particle state, this is filtrated and washed with water, methanol, etc., to manufacture the Cu fine particles being suitable for the electric conductive filler.

Double-sided composite printed circuit board

Abstract: A composite double-sided printed circuit board comprises a reinforcement sheet 5 adhered to a board 1. Board 1 is thin with printed circuits formed on both faces. The circuits 1a and 1b formed on the opposite faces are inter-connected by conductive ink 3 applied to lands 2 formed on the respective faces and having at least one hole 21 therein. The conductive ink 3 diffuses under gravity and/or surface tension through the holes 21 to contact with the respective land formed on the opposite face to provide an electrical inter-connection between the respective lands 2 to inter-connect the circuits 1a and 1b. The board 1 is thin enough to ensure that the conductive ink diffuses to the opposite side. The reinforcement sheet 5, which is provided with cutouts 51 for components to be fitted to the board 1, provides the required rigidity of the composite board.

Ink jet unit

Abstract: PURPOSE:To jet ink stably while preventing electrolysis of conductive ink by providing means for applying a preheat voltage onto a pair of electrodes before the temperature of the conductive ink reaches the boiling point and then applying a voltage for boiling the ink. CONSTITUTION:A voltage controller 12 comprises a control section 11 for controlling the frequency or the interval of voltage to be applied between electrodes 4 and 5, an AC reference pulse forming section 8 for forming a pulse, from an AC signal provided from the control section 11, which determines the positive and negative voltage parts, and a DC reference pulse forming section 10 for determining whether a DC signal provided from the control section is positive or negative. The voltage controller 12 further comprises a signal mixing section 9 for mixing AC and DC reference pulses, and a voltage output section 7 for applying a voltage between the electrodes 4 and 5 synchronously with the output from the signal mixing section 9. Consequently, setting can be made such that an AC current flows between the electrodes 4 and 5 during temperature rise process of conductive ink and a DC current flows at the time of ink jet. By such arrangement, ink can be jetted stably during DC voltage interval while preventing electrolysis of the conductive ink.

Manufacture of conductor line for hybrid circuit, especially hybrid power source circuit

Abstract: PURPOSE: To attain the hybrid circuit wire with optimum quality, especially a low resistivity with respect to an operation of the hybrid circuit is large power, by applying silk screening to a silver-palladium component onto a deposition layer on which silver is silk-screened CONSTITUTION: A conductive silver ink layer is manufactured on a board of the hybrid circuit by a first stage that its pattern is subject to silk screening by using a mask to decide position of wires in the pattern and a second stage that a second layer of conductive ink containing a silver-palladium component is subject to silk screening on a silver layer manufactured in the first stage by using the same mask The two conductive ink layers deposited in this way are cured altogether by a conventional method in a tunnel oven, each layer has a thickness of about 15 microns and then the total thickness after the curing is 30 microns Thus, a conductive wire having low resistivity to optimize the operation of the hybrid circuit in large power is obtained