公开(公告)号：US10446295B2

公开(公告)日：2019-10-15

申请号：US16072318

申请日：2017-01-23

申请人： KOA CORPORATION

发明人： Yasushi Hiroshima

IPC分类号： H01C1/028 ,  H01C1/032 ,  C23C14/06 ,  C23C16/40 ,  H01C7/00 ,  H01C17/12 ,  H01C17/16 ,  H01L23/522 ,  H01L49/02 ,  H01C1/14 ,  H01C17/02 ,  B23K26/382 ,  H01C7/02

摘要： Provided is a thin-film chip resistor including an insulating substrate; a thin-film resistive element formed on the substrate; a pair of electrodes connected to the thin-film resistive element; and a protective film covering at least the thin-film resistive element between the pair of electrodes, in which the protective film includes a first protective film and a second protective film, the first protective film containing silicon nitride in contact with the thin-film resistive element, and the second protective film containing silicon oxide in contact with the first protective film.

公开(公告)号：US11443877B2

公开(公告)日：2022-09-13

申请号：US17278130

申请日：2019-09-17

申请人： KOA CORPORATION

发明人： Homare Kaneko ,  Natsumi Shiobara ,  Yasushi Hiroshima

IPC分类号： H01C10/10 ,  G01B7/16 ,  H01C1/14

摘要： A strain sensor resistor includes: a resistive element (thin-film strain-resistive layer) formed nearly at the center of an upper surface of an insulation substrate to be a base; and front surface electrodes layered and formed on either end part of the resistive element and electrically connected to the resistive element. The entire upper part of the resistive element and a part of the front surface electrodes are covered by a protective film (protective coating). Moreover, back surface electrodes electrically connected to the front surface electrodes are formed on either lower end part of the insulation substrate, and end surface electrodes are formed on either longitudinal end surface of the insulation substrate. The strain sensor resistor has a tip shape solder mountable on a circuit board etc. using the back surface electrodes.

公开(公告)号：US10115504B2

公开(公告)日：2018-10-30

申请号：US15201099

申请日：2016-07-01

申请人： KOA CORPORATION

发明人： Yasushi Hiroshima

IPC分类号： H01C7/06 ,  H01C7/00 ,  H01C7/04 ,  H01C7/02 ,  H01C17/12

摘要： Provided is a thin-film resistor that has a higher resistance value than the conventional thin-film resistors while retaining excellent TCR characteristics. The thin-film resistor includes a substrate, a pair of electrodes formed on the substrate, and a resistive film connected to the pair of electrodes. The resistive film includes a first resistive film and a second resistive film, the second resistive film having a different TCR from that of the first resistive film, and each of the first resistive film and the second resistive film contains Si, Cr, and N as the main components.