Chip resistor

Patent metadata

Field	Value
Publication number	US-2016343479-A1
Application number	US-201515107079-A
Country	US
Kind code	A1
Filing date	Feb 2, 2015
Priority date	Feb 27, 2014
Publication date	Nov 24, 2016
Grant date	—

Abstract

A chip resistor includes a resistive element, a pair of electrodes, and heat radiator plates. The resistive element is made of a plate-shaped metal. The pair of electrodes is formed on both ends of a first surface of the resistive element. The heat radiator plates are fastened to a second surface of the resistive element and are disposed spaced apart from each other via a gap therebetween.

First claim

1 . A chip resistor comprising:
a resistive element of a plate-shaped metal; first and second electrodes formed at both ends of a first surface of the resistive element; and a plurality of heat radiator plates fastened to a second surface of the resistive element, wherein the plurality of heat radiator plates includes a first heat radiator plate closest to the first electrode and a second heat radiator plate closest to the second electrode and are disposed spaced apart from each other via a gap therebetween.

2 . The chip resistor according to claim 1 , wherein the second heat radiator plate has a heat conductivity different from a heat conductivity of the first heat radiator plate.

3 . The chip resistor according to claim 1 , further comprising an upper-layer heat radiator plate laminated on the first heat radiator plate and the second heat radiator plate.

4 . The chip resistor according to claim 1 , further comprising:
a first upper-layer heat radiator plate laminated on the first heat radiator plate; and a second upper-layer heat radiator plate laminated on the second heat radiator plate and thermally coupled with the first upper-layer heat radiator plate.

5 . The chip resistor according to claim 1 ,
wherein the first electrode is thermally coupled with the first heat radiator plate, and wherein the second electrode is thermally coupled with the second heat radiator plate.

6 . The chip resistor according to claim 1 , wherein a gap between the first heat radiator plate and the second heat radiator plate is away from a center line of the resistive element.

7 . The chip resistor according to claim 1 , wherein each of the plurality of heat radiator plates has a roughened surface.

8 . The chip resistor according to claim 1 , wherein each of the plurality of heat radiator plates includes a ceramic plate having a first surface stuck onto the second surface of the resistive element and a second surface opposite to the first surface; and a metal layer provided on the second surface of the ceramic plate.

9 . A chip resistor comprising:
a resistive element of a plate-shaped metal and provided with a trimming groove; a pair of electrodes formed at both ends of a first surface of the resistive element; and a heat radiator plate fastened to a second surface of the resistive element and covering at least a part provided with the trimming groove, wherein an end of the heat radiator plate substantially agrees with an outer perimeter of the part provided with the trimming groove in a planar view.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Itou Masaaki

Classifications

• H01C7/06

  including means to minimise changes in resistance with changes in temperature · CPC title

• H01C7/003

  Thick film resistors · CPC title

• H01C1/028

  the resistive element being embedded in insulation with outer enclosing sheath · CPC title

• G01R1/203

  Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts (resistors in general H01C; microwave or radiowave terminations H01P1/26; coupling devices H01R) · CPC title

• H01C1/14

  Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors · CPC title