Abstract: A standard solid electrolyte capacitor body having an outer surface of graphite and an anode lead has a novel cathode lead structure. A "c" shaped thin strip portion of the cathode lead is formed about the body and has a solder connection made therebetween. A wire-lead portion of the cathode lead extends away from the body in a parallel direction to that of the anode lead. The cup or "c" shaped portion of the cathode lead makes possible the easy registration of lead to body prior to soldering, even when tiny bodies are employed, which is especially effective during the large batch manufacturing steps in the mass production of capacitors.

Abstract: A method for forming a cadmium-containing glass-reacted-ceramic body is described. This material is advantageously employed as the dielectric material in a capacitor. The method comprises mixing a barium-titanate alkaline-earth-metal-zirconate powder with glass powder, forming a cake or layer of the powder mix and firing the cake at from 1600.degree. to 2050.degree. F in a controlled cadmium containing atmosphere to sinter and densify the material. The cake is buried in an inert powder to which has been added a cadmium oxide powder to supply a source of cadmium external of the cake and to control the cadmium containing atmosphere during firing. Cadmium ions diffuse, during sintering, into the glass and further, into the ceramic grains to promote grain growth and to downwardly shift the Curie temperature.

Abstract: Thin rectangular metal cups are press fitted into a row of rectangular holes in one and in another metal jigging strip. The patterns of holes in the two strips are identical. A small quantity of a conductive resin is dispensed into the cups of one strip and the cathode ends of a plurality of solid electrolyte capacitor bodies are pushed, preferably simultaneously, into the cups of this strip. A bonding resin is dispensed into the cups of the other strip and the anode ends of the capacitor bodies are pushed into the cups of this other strip. Near perfect registration and alignment of the two terminal cups of each capacitor body is achieved and the cost of terminating may be reduced in this disciplined and automatable method. These advantages are of greatest significance in terminating very small capacitors.

Abstract: A paint curtain machine for coating a substrate with paint has a fix mounted guide plate at either edge of the curtain for guiding and determining the edges of the falling paint curtain that otherwise tends to draw together and pour or at least to wrinkle and produce uneven paint coatings. The inner edges of the guide plates to which the paint curtain edges cling by capillarity are sloped inwardly toward the bottom of the curtain. Excess paint falling outside the left and right edges of the paint curtain fall about straight down the faces of the guide plates leaving a region of those faces dry adjacent the paint curtain. A highly uniform thickness of the paint curtain is realized permitting the attainment of thinner paint curtains having a high resistance to tearing. This system and method are especially advantageous in making thin ceramic dielectric layers in the production of monolithic ceramic capacitors.

Abstract: A quantity of tantalum powder is heated to a temperature greater than 400.degree. C in a non-oxidizing atmosphere to dissolve the tantalum oxide film existing on the surfaces of the tantalum particles. The treated powder without conventional organic binders is compressed to form a unitary pellet in a mold maintained in an inert atmosphere. The pellet is subsequently heated in a vacuum to sinter the particles together and to provide a porous tantalum pellet having carbon-free tantalum surfaces and a large exposed surface area per unit weight of tantalum. Electrolytic capacitors made from these pellets exhibit a larger CV product per unit weight of tantalum and/or a lower leakage current than for comparable capacitors known heretofore.

Abstract: A PTCR thermistor has a doped barium titanate body, and two base metal lead wires being bonded to and ohmically connected to two separate surface regions of the body by means of two conductive electrodes, respectively. The electrodes are comprised of aluminum particles being bound within a matrix of a lead borate glass. The glass amounts to from 20 to 60% by weight. The simple method of making the thermistor may include the selective application of heat to the electrode regions to avoid oxidizing the base metal leads. These thermistors are capable of undergoing many self-heating switching operations in service without deterioration of the lead to body connections.

Abstract: A thin stress-free hall-cell package includes a semiconductor hall-cell chip that is completely enveloped by a resilient cushioning material which is in turn held within a cup. The cup is attached to or is a part of at least one of the metal leads. Wires connect the leads to terminal-pads on the chip through the resilient cushioning material. The method for making the package includes providing support for the cup by one or more of the leads, placing the chip in the cup, dispensing a silicone resin into the cup and heat curing the resin. The package is completed with encapsulation of the cup and adjacent lead ends by a hard resin. The cup advantageously has a hole in its bottom such that a chip placed thereover is held in position for wire bonding by evacuating the hole from underneath by means of a vacuum system.

Abstract: At least one of the metallized surfaces of a ceramic disc is partially coated with a solder resist. A terminal is secured to the uncoated portion of the metallized surface by means of solder which does not adhere to the coated portion. The capacitor is trimmed to desired capacitance by abrading away the resist and the underlying metallization.

Abstract: A sealed electrolytic capacitor package includes an electrolytic capacitor section enclosed in a metal housing having an elastomeric grommet sealed in an open end of the housing. At least one lead extends through a tapered hole in the grommet, the large opening end of the tapered hole being positioned at the inside face of the grommet. The grommet has a raised mesa portion of irregular shape at one of its faces to aid in sensing the proper grommet orientation for insertion of one or more leads during assembly.

Abstract: A plastic impregnation header has two holes through which two leads of a dry electrolytic capacitor section are threaded. The header is seated against the section. The header has a tubular portion extending away from the section. The section is dip coated in an epoxy resin mixture so as to encapsulate the section, a portion of the extending leads and the header. After curing the encapsulant, the section is impregnated with a liquid electrolyte through the tube and the tube is sealed closed.

Abstract: The dielectric material of a ceramic capacitor contains a high temperature silver doped ceramic with a small proportion of a low temperature glass. The ceramic component consists essentially of a lead zirconate in which from 0.07 to 0.16 molar parts of the lead are replaced by lanthanum and in which from 0.10 to 0.40 molar parts of the zirconate are replaced by titanate. The capacitors may be fired in an air atmosphere without substantial loss of lead at temperatures as high as 2000.degree. F. Silver containing electrodes may be employed in a monolithic capacitor of this invention, the co-fired electrode advantageously causing a silver doping of the ceramic that in turn improves the stability of capacitance with temperature and applied voltage. Alternatively, the ceramic may be predoped with silver to achieve this result.

Abstract: A full wave rectifying junction-diode bridge rectifier is formed in an integrated silicon circuit. One of the two bridge output terminals is ohmically connected to the bulk doped silicon body so that this portion of the body may serve as the ground reference plane for the entire integrated circuit, including other signal processing circuits, and these other circuits may obtain their d.c. power from the other bridge output terminal. Thus, when the bulk doped body is of P-type conductivity, two of the four bridge diodes (grounded diodes) have their anodes connected to this ground reference terminal. Each of the grounded diodes is formed in an epitaxial pocket having two concentric P-type guard rings and a N-type guard ring positioned concentrically therebetween, all of which are tied to the ground point.

Abstract: Reverse voltage capability and increased cathode capacitance are obtained in a polar wet pellet electrolytic capacitor by welding a presintered porous disk of valve-metal particles to the inside bottom of a can having a valve-metal inner surface.

Abstract: A porous valve-metal capacitor is housed in a metal can and sealed therein by means of an outer glass-to-metal seal, an elastomeric bung and an inner plastic sealing member. The bung is compressed between these inner and outer sealing members so as to be highly strained, the ratio of the compressed to the uncompressed diameters thereof being at least 1.25 and the elastomeric bung being squeezed out radially to occupy at least 75% of the interface area between the inner and outer seals. This capacitor is capable of meeting the requirements of a severe test after 200 cycles from -55.degree. C to 125.degree. C.

Abstract: A process is disclosed for vacuum depositing by co-sputtering a thin film nickel-chromium resistor of metastable composition. Also disclosed is a resistor made by this process, which resistor possesses a near zero temperature coefficient of resistance.

Abstract: An uncased polypropylene capacitor is located within a sealed refrigeration system so as to be impregnated with the halocarbon refrigerant employed in the system.

Abstract: The electrolyte of a solid tantalum capacitor consists of manganese dioxide which is coated with an outer layer of graphite over which there is deposited a metal containing counterelectrode. Buried within the manganese dioxide is at least one layer of graphite and the intervening manganese dioxide between adjacent layers of graphite contains graphite particles that electrically connect the adjacent graphite layers. The capacitor may be subjected to temperatures up to 360.degree. C for several minutes without substantial degradation of the characteristic series impedance, even where the capacitor package contains organic materials.

Abstract: A cermet resistor employs film terminations of sub-micron thickness. The terminations contain particles of SiO.sub.2 or MnO.sub.2 that may be conveniently made by mixing such particles in a metal resinate paste, screening the paste on a glazed or unglazed substrate and firing. A glass containing resistor paste is screened in overlapping relationship with the fired terminations and is itself fired. The particle additives ameliorate cracking of the terminations at resistor firing and enhance the termination to substrate bond.

Abstract: In an integrated circuit formed in a P-type silicon crystal body having an N-type epitaxial layer grown thereon, and having at least one bipolar transistor and at least one ion implanted resistor formed therein, a MOS type capacitor is formed requiring no additional processing steps beyond those normally required to form the resistor and the transistor. The capacitor comprises a first electrode of P-type material, a thin layer of silicon oxide grown simultaneously with the oxide through which the resistor is implanted, and a metal electrode over the oxide dielectric layer. The capacitor of this invention exhibits a relatively high capacitance per unit area of integrated circuit real estate and may be manufactured using only process steps that are required to form bipolar transistors and ion implanted resistors.

Abstract: In a noble-metal containing resistor paste, there is added a quantity of colloidal aluminum oxide hydroxide (AlOOH) in order to make an upward adjustment in the TCR of the fired resistor film. The additions of AlOOH have only a small effect on the resistivity and usually causes a downward change in the resistivity value.