Abstract: A U-shaped coil is place on the fixture of the present invention and is folded such that each arm of the U is made into a U. The folded coil is then placed upon the insulators of a tree or rack through further movement of the fixture.

Abstract: A method of manufacturing a fluidic angular rate sensor of the type wherein fine wires, such as tungsten wires, are mounted in tension over the heads of two pairs of spaced apart metal supports which are mounted on a ceramic disc having fluid passage apertures therein, comprising plating gold on the wires; fixedly mounting the wires between the spread apart metal supports by means of thermocompression bonding or the like; and heating the mounted gold plated wires in a predetermined atmosphere for removing the plated gold from the wires and to recrystallize the wires.

Abstract: A ceramic heater body is formed in a plate shape, and has electrode attaching portions at both ends of the heater body. A plurality of openings are formed in the electrode attaching portion, and a metallized layer is formed on the inner peripheral surface of each of the openings. Electrodes having a plurality of wires are connected to the electrode attaching portions, for supplying power to the heater body. The metal wires are inserted into the openings formed having the metallized layers on the inner peripheral surfaces, and are secured by brazing to the metallized layers. The diameter of the metal wire is set to 0.5 to 3 mm, and the metal wires are buried in the openings, at a depth of 1 to 5 mm.

Abstract: The invention relates to electroweldable sockets. Previously the predominant method of manufacture has been by injection molding which while producing a socket of acceptable quality it is expensive and relatively slow.

Abstract: A process for producing a PTC device comprising the steps of forming a laminate comprising a PTC composition and at least two electrode plates having the PTC composition sandwiched therebetween, opposing the surface of a lead plate to be electrically connected to each of the electrodes, to the surface of each of the electrode plates of the laminate while contacting at a narrow area, and then passing a current between the electrode and the lead via the narrow contact surface to weld them. By this process, there is obtained a PTC device having, at a portion of the joining interface between each electrode plate and each lead plate, a nugget formed by melting both the plates. This PTC device has a low contact resistance between the PTC composition and the electrode plates.

Abstract: A process for producing a PTC device comprising the steps of forming a laminate comprising a PTC composition and at least two electrode plates having the PTC composition sandwiched therebetween, superposing, on the surface of each of the electrode plates of the laminate, a lead plate to be electrically connected to the electrode, joining the electrode plate and the lead plate by spot welding, and during or prior to the spot welding process, forming at least one through hole penetrating through the electrode plate and the lead plate in the center of a weld. This process can minimize the heat damage of the PTC composition and the resulting PTC device has a low contact resistance.

Abstract: This invention relates to a thermal head suitable for constituting a multithermal head used in a color printer, a method of manufacturing the same, and a multithermal head constituted by the thermal heads. The thermal head comprises a flexible insulating film having heating elements arranged in a predetermined pattern and lead wires which have one ends electrically connected to the elements, the film being fixed on a substrate, and heating element driver ICs mounted on the substrate and electrically connected to the wires on the film. The method comprises the steps of, coating the film on the plate, forming the elements in a predetermined pattern and the wires on the film, dividing the plate into portions in accordance with a change in level of a surface of the substrate to which the film is to be fixed, fixing the divided portions of the plate on the substrate, and locating the ICs at a position lower than that of the elements on the substrate and connecting the other ends of the wires to the ICs.

Abstract: A zig-zag picket graphite heater for use in high temperature furnaces of the type used for crystal growing, for example, utilizes a plurality of discrete graphite arcuate shell segments having vertically extending slots alternating from the upper and lower ends thereof. The edge pickets are adjacent slots which extend upwardly from the lower end of the segment and have extensions projecting below the other pickets so as to provide pads below the level of the slots. Graphite connectors span the adjacent pads of adjacent arcuate segments and certain of the connectors are also connected to electrical power supply terminals.

Abstract: Disclosed is a thermal head and a method of manufacturing the same, in which a heating portion provided with at least a heating resistor film, a conductor film and a protection film and formed on a substrate having a center-raised stripe and made of an electrically insulating material having anisotropy or selectivity with respect to etching is integrated with a lead wire portion separate from the heating portion and having lead wires formed on an electrically insulating substrate by connecting conductors of the heating portion with respective and corresponding ones of the lead wires of the lead wire portion.

Abstract: In a thin film resistor substrate for a thermal ink jet printhead, there is provided an elongated ink feed slot for supplying ink to a plurality of heater resistors on the substrate. Ink flows from this slot vertically through the substrate and then laterally along predetermined ink flow paths in an orifice plate and barrier layer members to ink reservoirs above the heater resistors. In this manner ink flow pressure drops to all of the reservoirs are equal and thereby enhance ink pressure control for all of the reservoirs.

Abstract: A method of forming chip resistors in which a resistive coating is applied to an insulating substrate which is subsequently divided up into single chip components includes the step of providing end terminations for the individual chip resistors before the sheet is divided up. This is achieved by forming a hole 13 in the substrate 11 at the position of each end termination and then coating the holes with an electrically conductive material 14 which electrically connects with the adjacent region of the resistive coating 12. In order to improve the solderability and the reliability of the end terminations the holes 13 may be filled with solder 15. The electrical value of the resistive element coating may then be adjusted to a precise value by trimming away some of the resistive element material with a laser. Finally, the substrate is divided up into the single chip resistor components.

Abstract: An electrical resistor comprising an insulating substrate, a thin continuous siloxane film of a reaction product of a hydrolyzed silane coated on the insulating substrate, the hydrolyzed silane may have the general formula: ##STR1## wherein R.sub.1 is an alkylidene group containing 1 to 20 carbon atoms, R.sub.2, R.sub.3 and R.sub.7 are independently selected from the group consisting of H, a lower alkyl group containing 1 to 3 carbon atoms and a phenyl group, X is an anion of an acid or acidic salt, and y is 1, 2, 3 or 4, and at least two spaced apart electrodes in electrical contact with the thin continuous siloxane film on the insulating substrate. Processes for preparing and using the resistor are also disclosed.

Abstract: An electric component such as a rectifier is shown in which the electric leads are formed from composite wire material. The wire material has a copper core surrounded by and metallurgically bonded to a layer of ferrous material such as steel having optimal concentricity which layer is in turn surrounded by and metallurgically bonded to a layer of copper.

Abstract: A process for making a homogeneous metal oxide varistor powder is described. The ingredients desired in a varistor which are water and acid soluble and dissolved in water and acid respectfully to make a solution. The remaining ingredients which are water and acid insoluble are then suspended in the solution to make a homogeneous slurry. The slurry is dried, calcined, reslurried, dried, pressed and sintered. The sintered body has electrical leads attached then encapsulated in an epoxy resin to make an encapsulated varistor package.

Abstract: An array of electrically interconnected spaced electrical components on an apertured substrate wafer, each component being connected to terminal conductor pads on one surface of the substrate and to terminal conductor pads on the opposite surface of the substrate by thick film conductor strips which extend along the walls of the apertures is disclosed.

Abstract: A process for making an encapsulated metal oxide varistor package comprises pressing the varistor powder mixture into a disc, sintering the pressed disc, followed by slow cooling to room temperature.The sintered disc is acid etched and a fritted-silver electrode applied on each side of the disc or in the alternative an aluminum coating is arc sprayed on each side of the disk followed by an arc sprayed copper coating on top of the aluminum coating. The fritted-silver electrode coating is heated to 660.degree. C. and slow cooled to room temperature. Sn-coated copper leads are soldered on the electroded disc of either electrode process and the assembly is encapsulated in resilient epoxy resin to form the encapsulated metal oxide varistor package.

Abstract: An apparatus and method for use in the attachment of a length of resistive wire under a preselected tension to wire-supporting end portions of a pair of generally parallel, resilient posts attached to a post support member.

Abstract: An apparatus relating to a voltage divider having one or more Kelvin connection taps, including first and second spaced terminals and a current carrying resistor between the first and second terminals. A third terminal is spaced from the resistor and the resistor has at least one conductive but non-current-carrying peninsula extending from a junction on the side of the resistor and connecting with the third terminal to produce a Kelvin connection tap. A cut is made only in the non-current-carrying peninsula along the path having a component parallel to the side of the resistor from which the peninsula extends and shading the junction of said peninsula and the side from the third terminal, to adjust the interconnection of the third terminal with the resistor and vary the voltage output without varying the resistance of the resistor. An extension of this cut may be made parallel to the edge of the peninsula to further increase the adjustment.

Abstract: A metal oxide varistor with controllable breakdown voltage and capacitance characteristics is fabricated by controlled diffusion of lithium into conventional metal oxide varistor material at elevated temperature. The varistor layer containing lithium exhibits an increased breakdown voltage, lowered capacitance, and low leakage current while maintaining a high coefficient of nonlinearity.

Abstract: A heater assembly for heating a surface such as the rear window of an automobile. A plurality of heater elements are adhesively secured onto the surface in generally vertically spaced horizontally extending direction. A pair of busbars are adhesively secured onto said surface in generally vertically extending direction overlying the heater elements adjacent the opposite ends thereof. End portions of the heater elements which extend beyond the busbars are wrapped around the busbars and firmly retained by a pair of covering members which are secured in juxtaposed relation to the busbars for providing good electrical contact between the heater elements and the busbars.

Abstract: An electrical resistor is described which is comprised of a resistor core having at least one electrically conductive end cap mounted thereon. The end cap is in electrical contact with the butt end portion of the core and electrically insulated from the side, or periphery, portion of the core member. The end cap has an outward-extending radial portion thereon, positioned contiguous to the junction between the core and the cap.The present electrical resistors are produced by forming a resistive core member of a conductor in a dielectric matrix material and an end cap, having an internal contact surface and a receiving portion. The receiving portion is larger than the outside diameter of the core. The end cap has an outward-extending radial position adjacent the receiving portion. The end cap is mounted on the core to place the butt end portion of the core in electrical contact with the internal contact surface of the end cap, but otherwise spacedly within the end cap.

Abstract: An electrical network containing at least one electric resistor, includes a support foil and at least one resistance layer coating the support foil forming the at least one electric resistor. The support foil and resistance layer are folded along a zig-zag line forming two outer surfaces of the resistance layer. Contact layers are each disposed on a different one of the outer surfaces of the resistance layer, a plastic layer is applied on the contact layers, and outer contact layers each make contact with a different one of the contact layers. A method is also provided for producing the same.

Abstract: In a glow plug for use in a diesel engine of the type wherein a heater rod is connected to one end of a hollow holder, and an external connecting terminal is inserted into the other end of the hollow holder through an electric insulator and electrically connected to the heater rod, an integrally combined terminal unit including a metal pipe, an electric insulator and the external connecting terminal embedded in the insulator is prepared. After inserting the terminal unit into the other end of the hollow holder, an external pressure is applied to the other end to deform the metal pipe for firmly bonding the metal pipe to the insulator. Thereafter an end surface of the other end of the hollow holder is caulked to form an annular ring that holds the inserted terminal unit. With this construction, the completed glow plug is maintained in a perfect air tight state regardless of the variation in the ambient temperature.

Abstract: An electrical resistor is described which is comprised of a resistor core having at least one electrically conductive end cap mounted thereon. The end cap is in electrical contact with the butt end portion of the core and electrically insulated from the side, or periphery, portion of the core member. The end cap has an outward-extending radial portion thereon, positioned contiguous to the junction between the core and the cap.The present electrical resistors are produced by forming a resistive core member of a conductor in a dielectric matrix material and an end cap, having an internal contact surface and a receiving portion. The receiving portion is larger than the outside diameter of the core. The end cap has an outward-extending radial position adjacent the receiving portion. The end cap is mounted on the core to place the butt end portion of the core in electrical contact with the internal contact surface of the end cap, but otherwise spacedly within the end cap.

Abstract: Manufacture of electrical components, particularly layer capacitors with dielectric layers of glow polymerisate, in which strip-shaped carriers are separated from an insulating tape. First, contact layers of a metal which does not soften during later contacting are applied to two opposite sides. Thereupon a metal layer and, optionally, further layers are applied to at least one side which is still free of metal. The metal layer is applied so that it overlaps at least one of the contact layers and forms with the latter an electrically conducting connection. The method is characterized by the features that the carriers are separated from an unmetallized insulating tape; that the cutting surfaces of the carriers are coated with the contact layers; and that then the metallization of the components is applied to one of the smooth surfaces which have not yet been metallized.

Abstract: A high voltage varistor for DC operation is manufactured by applying a glass collar to the perimeter of a sintered zinc oxide disc and heat treated between about 750.degree. C. and 400.degree. C. for several cycles in air. After heat treating, an organic resin or ceramic coating is applied to the glass collar to further insulate the varistor for high voltage application.

Abstract: The present invention provides a voltage-dependent resistor of the bulk-type in which zinc oxide (ZnO) powder and additives are admixed to form a sintered body composition having as the main constituent, zinc oxide, and in which the mixture is formed into a resistor body, the body is sintered, and electrodes are applied to the opposite surfaces of the sintered body, the improvement comprising the step of, prior to sintering and admixture with said zinc oxide, admixing all amount of boron oxide (B.sub.2 O.sub.3) with other additives in the form of a borosilicate glass, which is composed of 5 to 30 weight percent of boron oxide (B.sub.2 O.sub.3) and 70 to 95 weight percent of silicon oxide (SiO.sub.2). A process for the production of said resistor is also provided.

Abstract: There is provided a flexible electric heater element and a process for making such a heater element.The flattened ends of two lead wires are disposed on a first layer of material which includes a vulcanizable elastomer. The ends of a resistance wire are placed in electrical contact with the flattened ends of the two lead wires. A second layer of material, which includes a vulcanizable elastomer, is placed over the first layer sandwiching between the layers the resistance wire in electrical contact with the flattened ends of the two lead wires. The other ends of the two lead wires extend externally to the first and second layers of material.The elastomer is vulcanized and the flattened ends of the lead wires are held in permanent electrical contact with the ends of the resistance wire by forces exerted by the vulcanized elastomer.

Abstract: A method for making a carbide thin film thermistor which comprises providing an insulating substrate, forming at least one pair of electroconductive electrodes on the substrate in a desired pattern, and forming a carbide resistor film on the insulating substrate and the electroconductive electrodes by sputtering process while leaving part of the electrodes exposed for external connections. A carbide target material is sputtered in an inert gas atmosphere containing a small amount of an impurity gas. The thermistor element is arbitrarily controlled to have a desired level of resistance by choice of the impurity gas, the amount of such gas and the mode of sputtering. Optionally, the element is trimmed to adjust its resistance accurately and is also hermetically sealed within a glass tube to prevent the element from being contaminated with harmful substances.

Abstract: To improve the adhesion of a nickel layer to a valve metal layer in a thin film electronic circuit, a boundary layer is created between the valve metal and the nickel layer. The boundary layer is created by oxidizing the valve metal surface and applying the nickel layer by cathode sputtering with sufficiently high energy to cause nickel-ion migration into the valve metal oxide layer. The so-formed boundary layer improves the mechanical adhesion of the nickel layer to the valve metal layer and also prevents penetration of solder to the valve metal layer since the boundary layer acts as a diffusion barrier.

Abstract: The flex life of devices comprising a relatively inflexible PTC conductive polymer element is improved by surrounding the PTC element with a layer of a relatively flexible polymeric composition which is melt-fused thereto. Particularly useful devices are self-limiting strip heaters in which the polymeric component of the PTC element comprises a mixture of two crystalline polymers having substantially different melting points, the higher melting polymer having a melting point of at least 160.degree. C., preferably at least 200.degree. C., for example a mixture of polyvinylidene fluoride and a copolymer of ethylene and tetrafluoroethylene. Such devices can be made by melt-extruding a layer of the relatively flexible polymeric composition around the PTC element, and heating to cause melt-fusion of the polymers at the interface of the layer and the PTC element.

Abstract: A process for producing an electrical resistor of a ceramic or glass-ceramic substrate with reentrant cavities or pores having directly adhered thereon a metallic foil, said foil substantially having the configuration of the adjoining surface of said substrate, comprises placing in direct contact a ceramic or glass-ceramic substrate with the required cavities or pores and a metallic foil of an electrically resistive material patterned to give a required electrical resistance value, maintaining the direct contact between the substrate and foil while subjecting the assembly to equal pressure from every side so as to adhere said foil to said substrate without any intervening bonding agent between the substrate and the foil, and securing electrically conductive terminals in electrical contact with spaced regions of said foil.

Abstract: A high voltage varistor for DC operation is manufactured by applying a glass collar to the perimeter of a sintered zinc oxide disc and heat treated between about 750.degree. C. and 400.degree. C. for several cycles in air. After heat treating, an organic resin or ceramic coating is applied to the glass collar to further insulate the varistor for high voltage application.

Abstract: Disclosed is a range of resistor compositions which exhibit a stability of less than 0.5 percent change in resistance after 2,000 hours at 175.degree. C., and yet which also have a temperature coefficient of resistance less than + or -25 ppm per degree Celsius. These compositions all comprise alloys of nickel, chromium and silicon, within a selected range. Also, disclosed is a method of manufacturing these compositions on a reproducible basis. The method includes the provision of a first silicon target and a second nickel chromium target and the subjecting of these targets to a sputtering gas and electrical potential such that the aforementioned silicon, nickel, chromium alloys are formed.

Abstract: A titanium oxide resistive-type exhaust gas oxygen sensor having a unique microstructure of interlocked highly irregular, flake-like particles forming a highly durable porous body preferably having a surface area greater than about 3 square meters per gram. A method for producing such particles and forming them into such a high surface area body is also described.

Abstract: A vitreous enamel resistor, and method of making the same comprising the steps of applying to the surface of a substrate and firing a mixture of glass frit and particles of a precious metal oxide such as iridium oxide, ruthenium oxide, and mixtures thereof. The mixture is fired in a neutral, inert, or reducing atmosphere for a time and at a temperature resulting in a controlled partial dissociation of the oxide and softening of the glass frit. When cooled, a resistor is provided having a glass film with conductive particles therein strongly bonded to the substrate. The resistor produced can be terminated by the use of electroless plating.

Abstract: A method of constructing a self-regulating electric heater particularly useful for heating compressor lubricant and the like is disclosed in which a cylindrical body of electrically insulative ceramic is formed with an axially extending generally parallelepiped shaped slot in communication with an end of the body. A positive temperature coefficient of resistivity (PTC) resistor, configured slightly smaller and complementary with the slot, is disposed therein. Axially extending grooves are formed in two opposed parallel walls of the body which, with two other cooperating walls, define the slot. The grooves are located on opposite sides of an axial plane perpendicular to the opposed walls. A platform is formed in each groove to serve as a stop surface to limit the insertion of spring biased terminals which are inserted in the grooves to provide electrical connection with the PTC resistor.

Abstract: A matrix of discrete spaced electrical components (which may be individual components or networks, for example) in fixed array on a substrate wafer, each component being connected to terminal conductor pads on the opposite surface of the substrate by thick film conductor strips that extend along the walls of apertures in the wafer.

Abstract: A copper sleeve is employed to join a molybdenum disilicide heating rod with a conductor by a brazing process including fluxing the interior of the sleeve, positioning the sleeve partially over one end of the heating rod and heating the junction of the sleeve and rod in a nonoxidizing flame while applying a brazing alloy to the interior of the sleeve. The conductor is then crimped to the opposite end of the sleeve for providing an electrical and mechanical connection of the conductor to the heating rod.

Abstract: The present method and device provides that a thickness of wet ceramic material is laid down and partially dried to provide a base. This step is followed by screen printing one or more patterns of electrical resistance material on the upper surface of the partially dried ceramic base. Thereafter a second thickness of said wet ceramic is laid down and partially dried. In the event that the fabricator desires to provide a plurality of resistance paths, or a capacitor, in a single package, the foregoing process can be repeated with additional patterns of resistance material laid down or conductor material for a capacitor laid down, on the upper layer of partially dried ceramic material. The resistance or conductor patterns are sandwiched by additional thicknesses of ceramic materials screen stacked thereon. When the desired package has been achieved, the multi layered arrangement is given a final drying and it is then diced and fired.

Abstract: A resistor particularly useful as a self-regulating fluid heater has passages extending through a body of ceramic resistance material of positive temperature coefficient of resistivity (PTC) and has ohmic contact coatings formed on the inner walls of the passages. The passage walls define thin webs of the resistance material between adjacent passages and are of uniform thickness end to end. Slits located in the walls at the ends of selected passages accommodate electrically conducting means which interconnect the contacts in selected pairs of the passages. In that way, predetermined groups of the contacts are interconnected at respective ends of the resistor so that when the groups of contacts are connected in a circuit, electrical current is directed through the thin webs of resistance material between contacts of opposite polarity in adjacent passages, thereby to heat the resistor to self-regulate its temperature to efficiently generate heat for transfer to a fluid directed through the passages.

Abstract: A method of assembling an electrical device. In this method, a contact plate for a PTCR is disposed exteriorly of a casing therefor, and extensions on the contact plate are deformed into releasable securing engagement with the casing exteriorly thereof.

Abstract: A thermal printing head having a heating resistor prepared according to a thin-film technique and a wiring circuit prepared according to a thick-film technique achieves a high printing quality at a low cost. A thin-film resistor is formed on a heat-insulating dielectric layer which is, in turn, provided partially on a dielectric substrate, while thick-film lead electrodes, which are connected to a driving circuit, are formed on the dielectric substrate so as to make contact with the edge portion of the heat-insulating dielectric layer. Thin-film lead electrodes electrically connect the thick-film lead electrodes to the opposite ends of the thin-film resistor. The heat-insulating dielectric layer and the thick-film lead electrodes are provided by means of thick-film technique such as screen-printing and succeeding firing processes and the thin-film resistor and the thin-film lead electrodes are formed through thin-film technique such as sputtering or vacuum-evaporating process.

Abstract: A thermistor or other electrical component has electric contact material applied on at least one surface; the surface having the contact material is positioned over the surface of a supporting substrate; the substrate may carry two conductors to which the contact material on the component should be electrically connected; in one embodiment of the invention, a gap is formed to extend through the substrate through which gap an abrading element may extend for abrading the contact material, thereby to form two contacts from the unitary layer of contact material and also to shape the resulting contacts; alternatively the layer of contact material may be removed by a laser beam projected through the gap; in a further embodiment, there is no gap in the substrate; instead the substrate is clear and transparent beneath the contact material; a laser beam is shone through the substrate and acts upon and removes some of the contact material.

Abstract: Thermistors comprising transition metal such as iron, rare earth of the lanthanide series or yttrium, and oxygen exhibit sufficient independence to variation in oxygen partial pressure over a range of exhaust gas conditions of internal combustion engines as to make them particularly suitable for temperature compensation of oxygen sensors such as those derived from titania as well as temperature sensing in other oxygen varying environments.

Abstract: Method and apparatus are provided for press-fitting caps on electric parts and the like. The apparatus has a device for feeding component rods of electric parts to a rod-conveying wheel provided on its circumference with lateral equally spaced grooves for receiving the rods fed from the rod-feeding device one by one, and a cap-feeding device for feeding caps to a pair of cap-conveying wheels each provided on its circumference with lateral equally-spaced grooves for receiving the caps fed from the cap-feeding device, the cap-conveying wheels being arranged symmetrically and obliquely with respect to the rod-conveying wheel so that the lower ends thereof come in contact with the lower end of the rod-conveying wheel thereby to press-fit the caps on the rods successively, and the rod-conveying and cap-conveying wheels being rotated in synchronization with one another.

Abstract: A heating device for heating a glass surface, such as the rear window of a car, includes a pair of elongated electrically non-conductive carrier strips having an adhesive layer on both sides thereof and secured in spaced-apart relationship to the glass surface by one of their adhesive layers to laterally delimit the surface area of the glass encompassed by the heating device. A plurality of spaced, thin electrically conductive foil strips, each cut in predetermined lengths from a continuous strip, and each of which has an adhesive layer on one side, extend between the carrier strips. The ends of the foil strips overlie the carrier strips and are secured to the carrier strips and the glass surface by the adhesive layer thereof. A strip-shaped electrical terminal conductor overlies each carrier strip in electrically conductive engagement with the foil strip ends and is fastened to the carrier strip by the other adhesive layer on the carrier strip exposed between the foil strip ends.

Abstract: A high temperature thermistor and its method of fabrication are disclosed. The thermistor is fabricated from titanium dioxide ceramic forming material and is fabricated to achieve a high degree of densification approaching 100% of theoretical density. At elevated temperatures in the range of from about 700.degree. F. to about 1500.degree. F. densified titania ceramic material behaves as a semiconductor having a resistance which is responsive principally to the temperature of the thermistor element. The thermistor is fabricated by processing titania powder which includes a substantial majority of rutile phase material. The titania powder is processed to achieve a thermistor chip or member which demonstrates a high degree of density.

Abstract: An improved electrical resistor device is made by molding a body of ceramic material of positive temperature coefficient of resistivity so that a plurality of passages extend in a pattern in spaced side-by-side relation to each other between opposite ends of the body. In molding the body, lands or abutments of resistor material are formed around the ends of alternate body passages at one end of the body and similar lands or abutments are formed around the ends of the other passages at the opposite end of the body. A band of masking material is applied to the sides of the body extending around the body leaving the ends of the body, and bands of the body side surface adjacent each end of the body, free of masking material. The masked body is then immersed in a coating bath for simultaneously coating the inner walls of the body passages, the ends of the body, and the unmasked bands of the body side surface with an electrically conductive ohmic contact material.

Abstract: A temperature sensitive thick film resistor unit for use in detecting and control systems is formed employing thick film plating technology. A final sized negative is formed from enlarged artwork and transferred to a photosensitive emulsion supported on a stainless steel screen to form a printing stencil. A fritted molecular bonding nickel paste including finely divided vitreous and nickel particles in a solvent carrier is screen printed onto an alumina substrate by a pressure printer in which the paste is forced through the screen to control the thickness of the deposited nickel paste. The deposited nickel is allowed to settle and partially heated to remove gases and organic solvents. A highly conductive film is overlaid on tab connecting ends and the unit is fired to intimately attach the nickel paste to the substrate by the formation of a chemical bond.