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| Number | Title | Issue Date |
| 7414514 | Resettable chip-like over-current protection devices The invention relates to resettable chip-type over-current protection devices and methods of making the same, characterized by directly forming upper and lower electrode conductor and connection electrode conductor on a PPTC substrate so as to constitute a simplifie... | 08/19/2008 |
| 7355504 | Electrical devices An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprising (a) a main portion which comprises a main part of the first electrode, a ma... | 04/08/2008 |
| 7334318 | Method for fabricating a resistor A method of manufacturing an inexpensive fine resistor which do not require dimensional classifications of discrete substrates is disclosed. The method eliminates a process of replacing a mask according to a dimensional ranking of each discrete substrate. The method... | 02/26/2008 |
| 7292133 | Resistance circuit, and voltage detection and constant voltage generating circuits incorporating such resistance circuit A resistance circuit included in a semiconductor apparatus, which is formed of a plurality of thin film metal resistors connected in series, capable of achieving a precise resistance adjustment over a wide range by disconnecting or changing the resistors by laser be... | 11/06/2007 |
| 7205880 | Trimmer impedance component, semiconductor device and trimming method A trimmer resistance component of the present invention has a trimmer resistor constructed of a p-type diffusion layer formed on the surface of an n-type epitaxial layer. A first electrode is connected to a portion located on one end side of this trimmer resistor, w... | 04/17/2007 |
| 7203049 | Over-current protection device The over-current protection device of the present invention uses the unbalanced properties of the thermal expansion coefficients between the outer and inner sides for an upper metallic conductive sheet and a lower metallic conductive sheet to generate a torque to de... | 04/10/2007 |
| 7188404 | Method for fabricating a resistor An inexpensive fine resistor which do not require dimensional classifications of discrete substrates, eliminating a process of replacing a mask according to a dimensional ranking of each discrete substrate as in the prior art. The resistor includes discrete substrat... | 03/13/2007 |
| 7165315 | Method for fabricating a resistor An inexpensive fine resistor which do not require dimensional classifications of discrete substrates, eliminating a process of replacing a mask according to a dimensional ranking of each discrete substrate as in the prior art. The resistor includes discrete substrat... | 01/23/2007 |
| 7105911 | Multilayer electronic substrate, and the method of manufacturing multilayer electronic substrate A multilayer electronic substrate is manufactured by employed: a first conductor layer arranged on an insulating substrate; an insulator arranged on the first conductor layer; a resistor arranged on the insulator; and second conductor layers for sandwiching the resi... | 09/12/2006 |
| 6935016 | Method for manufacturing a resistor An inexpensive fine resistor which do not require dimensional classifications of discrete substrates, eliminating a process of replacing a mask according to a dimensional ranking of each discrete substrate as in the prior art. The resistor includes discrete substrat... | 08/30/2005 |
| 6895660 | Manufacturing method of over-current protection devices The present invention discloses a manufacturing method of an over-current protection device, characterized in that the PTC plaque is conducted by punching under frozen state to form the over-current protection devices so as to reduce the heating and temperature risi... | 05/24/2005 |
| 6856235 | Methods for manufacturing resistors using a sacrificial layer A method of making resistors includes providing a sacrificial layer. Conductive material is then formed over a region of the sacrificial layer. Resistive material is then deposited over the first surface of the sacrificial layer such that the resistive material cove... | 02/15/2005 |
| 6704997 | Method of producing organic thermistor devices Organic thermistor devices are produced by a first step of molding an organic thermistor material by covering a plurality of electrically conductive members to form a conductor-containing member, which is elongated in a longitudinal direction, has a pair of mutually... | 03/16/2004 |
| 6653927 | Structure used for manufacturing a line-type heater The scribe line is constituted by a large number of depressed portions of desired depth formed by radiation of a laser beam in a surface of the raw substrate corresponding to a boundary line between adjacent insulating substrates so that the depressed por... | 11/25/2003 |
| 6636143 | Resistor and method of manufacturing the same The present invention relates to a resistor and a manufacturing method of the same. The invention aims at providing the resistor and the manufacturing method thereof that can reduce a soldering area that occupies a mount area, when the resistor is mounted... | 10/21/2003 |
| 6577225 | Array resistor network An array resistor network that has a high density of resistors per unit area. The array resistor network includes a ceramic substrate having a top and bottom surface. Apertures extend through the substrate between the top and bottom surfaces. Recesses are... | 06/10/2003 |
| 6469614 | Printed circuit boards having at least one metal layer A printed circuit board has a conductor path applied to a substrate having an electrically insulating surface, the conductor path preferably being constructed in the shape of a meander and containing connection areas with holes to which small contact plat... | 10/22/2002 |
| 6297722 | Surface mountable electrical device A process for manufacturing surface mountable electrical devices includes the steps of preparing a PTC resistive plate, covering the plate with first and second conductive layers to form a laminate, forming a plurality of spaced apart bores of cross-shape... | 10/02/2001 |
| 6242713 | Plane heating element without electromagnetic waves and a manufacturing method thereof Disclosed is a plane heating element and a manufacturing method thereof, particularly the plane heating element without external electromagnetic waves and a manufacturing method thereof, wherein magnetic fields formed by the currents that flow through hea... | 06/05/2001 |
| 6238992 | Method for manufacturing resistors A method for manufacturing resistors comprising the steps of forming a top electrode layer on a top face of a substrate, a resistance pattern connected to the top electrode layer, a protective layer covering the resistance pattern, a thin metal film side ... | 05/29/2001 |
| 6223423 | Multilayer conductive polymer positive temperature coefficient device A conductive polymer PTC device includes upper, lower, and center electrodes, with a first PTC conductive polymer layer between the upper and center electrodes, and a second PTC conductive polymer layer between the center and lower electrodes. Each of the... | 05/01/2001 |
| 6211771 | Electrical device Electrical devices, particularly circuit protection devices, contain conductive polymer elements whose edges are formed by breaking the conductive polymer element, along a desired path, without the introduction of any solid body into the element. The resu... | 04/03/2001 |
| 6130597 | Method of making an electrical device comprising a conductive polymer An electrical device in which a resistive element composed of a conductive polymer composition and two electrodes is made by a method in which the device is cut from a laminate of the conductive polymer composition and the electrodes, is exposed to a ther... | 10/10/2000 |
| 5929746 | Surface mounted thin film voltage divider A surface mounted thin film precision voltage divider is provided by incorporating two resistors on a single base of the same size and configuration as prior art surface mounted thin film precision resistors. Because the resistors were made at the same ti... | 07/27/1999 |
| 5864281 | Electrical devices containing a conductive polymer element having a fractured surface Electrical devices, particularly circuit protection devices, contain conductive polymer elements whose edges are formed by breaking the conductive polymer element, along a desired path, without the introduction of any solid body into the element. The resu... | 01/26/1999 |
| 5831510 | PTC electrical devices for installation on printed circuit boards Laminar electrical devices, in particular circuit protection devices, contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes. This... | 11/03/1998 |
| 5757076 | Chip type electronic component A chip type electronic component is provided which includes a chip substrate having an opposite pair of end edges and an opposite pair of side edges between the pair of end edges. An opposite pair of first electrodes is formed in a layer on the chip subst... | 05/26/1998 |
| 5710538 | Circuit having trim pads formed in scribe channel In accordance with the present invention, trim pads used in trimming on-chip resistive elements are formed in the scribe channels interposed between respective dice on a wafer. Metal traces connect the trim pads to their associated resistive elements form... | 01/20/1998 |
| 5606302 | PTC circuit protection device with non-opposed spring terminals An electronic component device includes an electronic component element 13 that is interposed between a pair of spring terminals 14 and 15. The electronic component element 13 is resiliently held by the spring terminals 14 and 15, and contact portions 17 ... | 02/25/1997 |
| 5563572 | SMD resistor A resistor of SMD (Surface Mounted Device) construction includes a film of a resistive alloy as a resistive track on two electrically separated carrier plate elements of copper, which are constructed as contact elements solderable to the terminals of a pr... | 10/08/1996 |
| 5493148 | Semiconductor device whose output characteristic can be adjusted by functional trimming A semiconductor device includes a resistor network having a plurality of trimming polysilicon resistors. The polysilicon resistors have the same width and different lengths and can be selectively fused according to the value of current which is caused to ... | 02/20/1996 |
| 5352870 | Strip heater with predetermined power density A resistance strip heater includes a pair of elongated, mutually parallel electrical conductors or buses lying on a dielectric substrate. Each bus includes a conductive region extending toward the other conductor, and the locations of the conductive regio... | 10/04/1994 |
| 5206623 | Electrical resistors and methods of making same An electrical resistor which is fabricated from traces of resistive material on a substrate of insulating material. The traces are interconnected electrically in series by first links and in parallel by second alternating links, which are connected to dif... | 04/27/1993 |
| 5206624 | Intermediate product for use in the production of thick-film circuits An intermediate product is provided and includes a substrate having at least one thick-film circuit formed thereon. An outer surface of a first portion of the thick-film circuit is coated with a readily removable protective material such as ethyl cellulos... | 04/27/1993 |
| 4924205 | Chip resistor and method of manufacturing a chip resistor A chip resistor comprising a cuboid resistor body of a ceramic material and solderable, metal, current-supply strips at a first pair of opposing side faces of the resistor body, can readily and accurately be manufactured in that a second pair of opposing ... | 05/08/1990 |
| 4788523 | Viad chip resistor A viad chip resistor made from an insulative wafer and having a via formed near end of the wafer. Conductive pads surround the vias on both sides of the wafer. A resistive element is formed on one side of the wafer between the vias and is electrically con... | 11/29/1988 |
| 4714820 | Electrically heated curling wrapper An electrically heatable hair wrapper capable of being cut to any predetermined length from a flat, elongated, flexible base carrying a plurality of parallel resistance heating circuits. The circuits extend along the length of the base in a periodic serpe... | 12/22/1987 |
| 4646056 | Matching of resistor sensitivities to process-induced variations in resistor widths A method is disclosed for matching the sensitivities of different-sized resistors to changes in resistance due to changes in width resulting from a systematic manufacturing error. In order to produce sets of resistors which can be deployed in predetermine... | 02/24/1987 |
| 4586019 | Matching of resistor sensitivities to process-induced variations in resistor widths A method is disclosed for matching the sensitivities of different-sized resistors to changes in resistance due to changes in width resulting from a systematic manufacturing error. In order to produce sets of resistors which can be deployed in predetermine... | 04/29/1986 |
| 4565000 | Matching of resistor sensitivities to process-induced variations in resistor widths A method is disclosed for matching the sensitivities of different-sized resistors to changes in resistance due to changes in width resulting from a systematic manufacturing error. In order to produce sets of resistors which can be deployed in predetermine... | 01/21/1986 |
