Garden City, NY, United States
Garden City, NY, United States

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Patent
TDK Corp | Date: 2016-06-29

A rotary sensing device that can accurately detect a rotation direction, even if a rotating body rotates at a high speed, when a gap between a plurality of subjects for detection in a rotating body varies is equipped with first to ^(Nth )sensor elements that are aligned to oppose the rotating body, which is rotatable in a rotation direction that can be either a normal rotation direction or a reverse rotation direction, and in parallel in respective order along the rotation direction, and that output first to Nth (N3) sensor signals based upon the rotation of the rotating body, respectively, and a rotation direction detecting part that detects the rotation direction of the rotating body based upon each sensor signal output from each sensor element, and the rotation direction detecting part detects the rotation direction of the rotating body from a first differential signal that is obtained from the first sensor signal and the M^(th )(3MN) sensor signal, and a second differential signal obtained from the first sensor signal and the L^(th )(2LM-1) sensor signal.


Disclosed herein is an optical waveguide element that includes a substrate and a waveguide layer formed on the substrate and comprising lithium niobate. The waveguide layer has a slab part having a predetermined thickness and a ridge part protruding from the slab part. The maximum thickness of the slab part is 0.05 times or more and less than 0.4 times a wavelength of a light propagating in the ridge part.


Patent
TDK Corp | Date: 2016-09-06

An acceleration sensor capable of improving sensitivity is provided. In the acceleration sensor, although a solder fillet is formed in a lower end of a terminal electrode exposed from a covering portion, the covering portion suppresses the rise of the solder fillet. Due to this, the operation of the acceleration sensor is not easily limited by the solder fillet, and the acceleration sensor can generate electric charge which corresponds to a load more accurately. Therefore, the sensitivity of the acceleration sensor can be improved.


Patent
TDK Corp | Date: 2016-06-29

A magnetic sensor device that can prevent an increase in detection error even when stress is applied to a magnetic sensor chip due to heat generation or the like at the time of operation includes a magnetic sensor chip that has a nearly-square shape in a plan view, and a die pad having a mounting surface where the magnetic sensor chip is mounted. Opening portions are formed at positions where four corners of the magnetic sensor chip mounted on the mounting surface overlap, respectively. An area ratio of the opening portions to an area of the die pad is 20% or greater. Also, an area of the overlapped portions with the magnetic sensor chip and the opening portions is 40% or greater relative to the area of the opening portions in a plan view of the die pad.


Patent
TDK Corp | Date: 2017-01-04

A dielectric composition containing a complex oxide represented by the formula of xAO-yBO-zC_(2)O_(5) as the main component, wherein A represents at least one element selected from the group including Ba, Ca and Sr, B represents Mg, and C represents at least one element selected from the group including Nb and Ta, and x, y and z meet the following conditions, x+y+z=1.000, 0.000


This arcuate magnet piece (1) is provided with: coupling side surfaces (6, 7) which are coupled with other adjacently joined arcuate magnet pieces (1A); a curved inner peripheral surface (3); and a curved outer peripheral surface (2) which faces the inner peripheral surface (3). The coupling side surfaces (6, 7) are provided with tip surfaces (6a, 7a) which intersect, at prescribed angles (1, 2), tangents (T1, T2) to the direction of curvature of the outer peripheral surface (2). The coupling side surfaces (6, 7) are polarized such that, in cases when the gaps formed with the coupling side surfaces of the other arcuate magnet pieces (1A) are disposed so as to be substantially parallel, the magnetic poles of the other joined arcuate magnet pieces (1A) are different.


Patent
TDK Corp | Date: 2017-02-08

The present invention provides a semiconductor ceramic composition comprising a compound represented by the following general formula (1) as a main component.


Patent
TDK Corp | Date: 2017-04-05

An object of the present invention is to provide a ferrite magnetic material capable of providing a permanent magnet in which high Br and HcJ are kept, and which has a high Hk/HcJ. A ferrite magnetic material in accordance with a preferred embodiment has a ferrite phase having a hexagonal structure and has a main composition represented by Ca_(1-w-x-y)R_(w)Sr_(x)Ba_(y)Fe_(z)M_(m)O_(19) (R is at least one element of rare earth elements (including Y) essentially including La, and Bi, and M is at least one element of Co, Mn, Mg, Ni, Cu, and Zn essentially including Co), where 0.25


Patent
TDK Corp | Date: 2017-01-04

A dielectric composition containing a complex oxide represented by the formula of xAO-yBO-zC_(2)O_(5) as the main component, wherein A represents at least one element selected from the group including Ba, Ca and Sr, B represents Mg, and C represents at least one element selected from the group including Nb and Ta, and x, y and z meet the following conditions, x+y+z=1.000, 0.198x0.375, 0.389y0.625, and x/3zx/3+1/9.


Patent
TDK Corp | Date: 2017-04-12

A dielectric composition containing a complex oxide represented by the formula of A_()B_()C_(2)O_(++5) as the main component, wherein A represents Ba, B represents at least one element selected from the group consisting of Ca and Sr, C represents at least one element selected from the group consisting of Ta and Nb, and , and meet the following conditions, i.e., ++=1.000, 0.000<0.375, 0.625<1.000, 0.0000.375.

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