Yageo Corporation

Kaohsiung, Taiwan

Yageo Corporation

Kaohsiung, Taiwan

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Patent
Yageo Corporation | Date: 2016-02-29

A resistor includes a body and two connecting members. The body is made from an ohmic material and has two opposite side faces. Each of the connecting members has a side surface that has a connecting region welded to a respective one of the side faces of the body.


Wong K.-L.,National Sun Yat - sen University | Liu Y.-C.,National Sun Yat - sen University | Chou L.-C.,Yageo Corporation
Microwave and Optical Technology Letters | Year: 2012

By embedding a printed parallel resonant circuit, the lower-band bandwidth of the proposed internal tablet computer antenna is greatly enhanced.This bandwidth-enhancement technique allows the proposed antenna to cover the eight-band wireless wide area network/long term evolution operation in the 704-960 and 1710-2690 MHz bands with a small size of 12 × 60 × 3.8 mm 3 in the tablet computer. The main radiator of the antenna comprises a patch monopole, a longer shorted strip, and a shorter shorted strip. The latter two shorted strips form the outer boundary of the antenna and are parasitically excited by the patch monopole. The parallel resonant circuit is formed by embedding a chip-inductor-loaded narrow strip in-between the longer shorted strip and the patch monopole, with the narrow strip whose front terminal connected to the patch monopole and end section gap-coupled to the longer shorted strip. This embedded circuit can lead to the generation of a parallel resonance seen at the antenna's feeding point. By controlling the parallel resonance to be at the high-frequency tail of the resonant mode at about 800 MHz contributed by the longer shorted strip, an additional resonance can be generated, which can result in dual-resonance excitation of the original single-resonance mode. Thus, a wide antenna's lower band is obtained. Further, the patch monopole can contribute a resonant mode to combine additional resonant modes contributed by the two shorted strips to form a wide antenna's upper band. Details of the proposed antenna with the embedded parallel resonant circuit are described in the article. © 2011 Wiley Periodicals, Inc.


Chen C.-T.,National Cheng Kung University | Huang C.-Y.,National Cheng Kung University | Lin H.-J.,National Cheng Kung University | Lee C.-T.,Yageo Corporation
Journal of the European Ceramic Society | Year: 2012

We investigated effects of substituting cobalt for magnesium on microstructures and microwave dielectric properties of BaMg 1/3Nb 2/3O 3 ceramics. Nucleation and growth of 1:2 ordered domains dominate microstructural variations for Ba(Mg 1-xCo x) 1/3Nb 2/3O 3 ceramics. Microstructures such as grains sizes and domain sizes significantly dominate variations of Q×f value. Less ordered domains are nucleated when substituting small amount of cobalt (x<0.1). Accordingly, domains and grains significantly grow with increased cobalt substitution. The 1:2 ordering degree is subsequently increased, and Q×f achieves a maximum value at x=0.05. Nevertheless, while cobalt substitution exceeds x=0.1, more ordered nuclei occur and consequently affect the domain growth and the grain growth. The Q×f value remarkably decreases at x=0.1, and varies due to different ordering degrees and compositions. The Q×f value of specimens at x=0.05 becomes as high as 43,000, and is similar to that of specimens at x=0.5. © 2012 Elsevier Ltd.


A titanium compound-containing core-shell powder includes a plurality of core-shell particles, each of which includes a core body and a shell layer encapsulating said core body. The core body is electrically conductive. The shell layer includes a crystal that is selected from titanate oxides having a perovskite structure and titanate oxides having a spinel structure. The core body and the shell layer are chemically bonded to each other.


The present invention relates to a chip resistor having low resistance and a method for manufacturing the same. The chip resistor includes a substrate, a resistive layer, a pair of conducting layers and at least one protective layer. The substrate has a first surface. The resistive layer is disposed on the first surface of the substrate. The conducting layers are disposed adjacent to the first surface of the substrate. The at least one protective layer is disposed on the resistive layer or the conducting layers. As a result, the resistive layer has a precise pattern, and the duration of sputtering is reduced, thereby improving yield rate and efficiency while reducing manufacturing cost.


Patent
Yageo Corporation | Date: 2014-06-06

The disclosure provides a chip resistor including: a substrate, two first electrodes, two second electrodes, a resistive layer, at least one protection layer and at least one coating layer. The protection layer covers part of the two first electrodes, and includes at least two overlay sides and at least one overlay plane. The coating layer covers the at least two overlay sides, the at least one overlay plane, and part of the two first electrodes and the two second electrodes. The chip resistor uses the two overlay sides and the overplay plane to extend a distance between the two first electrodes and the outside. Therefore, it is difficult for the airborne sulfur, sulfides and sulfur-containing compounds to enter and react with the two first electrodes. Thus, the chip resistor can resist corrosion of harmful substances such as sulfur, sulfides and sulfur-containing compounds or halogens on the electrodes.


Patent
Yageo Corporation | Date: 2012-11-19

The present invention relates to an antenna having a connecting circuit, which includes a substrate, a grounding metal strip, a first radiating metal strip, a second radiating metal strip and a connecting circuit. The first radiating metal strip is not connected to the grounding metal strip or the second radiating metal strip. The connecting circuit connects different positions on the grounding metal strip and on the second radiating metal strip, so as to form a plurality of resonant paths of different lengths between the grounding metal strip and the second radiating metal strip. Thereby, the frequency of the antenna varies between different values, so that the range of the application and the practicality of the antenna are increased.


Patent
Yageo Corporation | Date: 2015-11-30

A passive device includes a substrate that has opposite first and second surfaces, an electrical connecting unit, a first passive unit, and a second passive unit. The electrical connecting unit includes a first pad formed on the first surface and a second pad formed on the second surface and is electrically connected to the first pad. The first passive unit is formed on the first surface and electrically connected to the first pad. The second passive unit is formed on the second surface and includes two separated electrode layers electrically insulated from the electrical connecting unit, and an insulator layer interconnecting the electrode layers.


Patent
Yageo Corporation | Date: 2016-03-09

A titanium compound-containing core-shell powder includes a plurality of core-shell particles, each of which includes a core body and a shell layer encapsulating said core body. The core body is electrically conductive. The shell layer includes a crystal that is selected from titanate oxides having a perovskite structure and titanate oxides having a spinel structure. The core body and the shell layer are chemically bonded to each other.


Patent
Yageo Corporation | Date: 2011-10-25

The present invention relates to a chip resistor and method for manufacturing the same. The method includes the following steps of: (a) providing a substrate and a resistor layer; (b) attaching the resistor layer to the substrate; (c) forming a first metal layer; (d) forming a plurality of through holes; (e) forming a connecting metal layer in the through holes to electrically connect the resistor layer and the first metal layer; (f) patterning the resistor layer to form a plurality of first resistor bodies; (g) forming a plurality of first protecting layers to protect the first resistor bodies; and (h) proceeding a singulation process along a plurality of cutting lines to form a plurality of chip resistors. Whereby, no alignment problem occurs and the yield can be raised.

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