公开(公告)号：US09214259B2

公开(公告)日：2015-12-15

申请号：US14456440

申请日：2014-08-11

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hiroshige Adachi ,  Seiji Fujita ,  Kazuhiro Kaneko ,  Satoru Adachi ,  Sadaaki Sakamoto

IPC: H01B3/12 ,  B32B7/02 ,  C04B35/20 ,  H01G4/30 ,  H01G4/12 ,  B32B18/00 ,  H05K1/02 ,  H05K3/46 ,  C04B35/462 ,  C04B35/478 ,  C04B35/626 ,  H01G4/10 ,  C04B35/443

CPC classification number: H01B3/12 ,  B32B7/02 ,  B32B18/00 ,  C03C3/064 ,  C03C4/16 ,  C03C8/20 ,  C03C12/00 ,  C04B35/20 ,  C04B35/443 ,  C04B35/462 ,  C04B35/478 ,  C04B35/62685 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3222 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/36 ,  C04B2235/6025 ,  C04B2235/80 ,  C04B2237/341 ,  C04B2237/343 ,  C04B2237/62 ,  H01G4/105 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1218 ,  H01G4/129 ,  H01G4/30 ,  H05K1/024 ,  H05K3/4629 ,  H05K3/4688 ,  H05K2201/10371 ,  Y10T428/24942

Abstract: A composite laminated ceramic electronic component that includes co-fired low dielectric-constant ceramic layers and high dielectric-constant ceramic layers. The low dielectric-constant ceramic layers and the high dielectric-constant ceramic layers are each composed of a glass ceramic containing: a first ceramic composed of MgAl2O4 and/or Mg2SiO4; a second ceramic composed of BaO, RE2O3 (where RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0 weight % of RO (where R is an alkaline-earth metal), 14.2 to 30.0 weight % of SiO2, 10.0 to 20.0 weight % of B2O3, 0.5 to 4.0 weight % of Al2O3, 0.3 to 7.5 weight % of Li2O, and 0.1 to 5.5 weight % of MgO; and MnO. The content ratios of the glass, etc. are varied between the low dielectric-constant ceramic layers and the high dielectric-constant ceramic layers.

Abstract translation: 一种复合层压陶瓷电子元件，包括共烧低介电常数陶瓷层和高介电常数陶瓷层。 低介电常数陶瓷层和高介电常数陶瓷层各自由玻璃陶瓷组成，其包含：由MgAl 2 O 4和/或Mg 2 SiO 4组成的第一陶瓷; 由BaO，RE2O3（其中RE为稀土元素）和TiO 2组成的第二陶瓷; 包含44.0至69.0重量％的RO（其中R是碱土金属），14.2至30.0重量％的SiO 2，10.0至20.0重量％的B 2 O 3，0.5至4.0重量％的Al 2 O 3，0.3至7.5重量％的玻璃 ％的Li 2 O和0.1〜5.5重量％的MgO; 和MnO。 玻璃等的含量比在低介电常数陶瓷层和高介电常数陶瓷层之间变化。

公开(公告)号：US09067380B2

公开(公告)日：2015-06-30

申请号：US14067286

申请日：2013-10-30

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hiroshige Adachi ,  Kazuhiro Kaneko ,  Sadaaki Sakamoto ,  Satoru Adachi

IPC: B32B7/02 ,  H01G4/30 ,  H01G4/12 ,  B32B18/00 ,  C04B35/20 ,  C04B35/443

CPC classification number: B32B7/02 ,  B32B18/00 ,  C03C3/064 ,  C03C8/02 ,  C03C8/14 ,  C03C8/20 ,  C04B35/20 ,  C04B35/443 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3418 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/36 ,  C04B2235/365 ,  C04B2235/6025 ,  C04B2235/80 ,  C04B2237/341 ,  C04B2237/343 ,  C04B2237/62 ,  C04B2237/66 ,  H01G4/129 ,  H01G4/30 ,  Y10T428/24942

Abstract: A composite laminate ceramic electronic component that includes co-fired low dielectric constant ceramic layers and high dielectric constant ceramic layers. The low dielectric constant ceramic layers and high dielectric constant ceramic layers are each composed of a glass ceramic containing: a first ceramic composed of at least one of MgAl2O4 and Mg2SiO4; a second ceramic composed of BaO, RE2O3 (RE is a rare earth element), and TiO2; glass containing each of 44.0-69.0 wt % of RO (R is an alkaline-earth metal), 14.2-30.0 wt % of SiO2, 10.0-20.0 wt % of B2O3, 0.5-4.0 wt % of Al2O3, 0.3-7.5 wt % of Li2O, and 0.1-5.5 wt % of MgO; and MnO. The content ratios of the first ceramic, second ceramic, glass, and MnO are varied between the low dielectric constant ceramic layers and the high dielectric constant ceramic layers, wherein the content of MnO in the low dielectric constant ceramic layers is 7.5-18.5 wt % MnO.

Abstract translation: 一种复合层压陶瓷电子元件，包括共烧低介电常数陶瓷层和高介电常数陶瓷层。 低介电常数陶瓷层和高介电常数陶瓷层各自由玻璃陶瓷组成，所述玻璃陶瓷包含：由至少一种MgAl 2 O 4和Mg 2 SiO 4组成的第一陶瓷; 由BaO，RE2O3（RE为稀土元素）和TiO2组成的第二陶瓷; 含有44.0-69.0重量％RO（R为碱土金属），14.2-30.0重量％SiO 2，10.0-20.0重量％B 2 O 3，0.5-4.0重量％Al 2 O 3，0.3-7.5重量％ 的Li2O和0.1-5.5重量％的MgO; 和MnO。 第一陶瓷，第二陶瓷，玻璃和MnO的含量比在低介电常数陶瓷层和高介电常数陶瓷层之间变化，其中低介电常数陶瓷层中的MnO含量为7.5-18.5重量％ MnO。

公开(公告)号：US10906839B2

公开(公告)日：2021-02-02

申请号：US15790267

申请日：2017-10-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yasutaka Sugimoto ,  Kazuhiro Kaneko

IPC: C04B35/195 ,  H01B3/12 ,  C04B35/16 ,  H05K1/03 ,  B32B18/00 ,  C04B35/14 ,  C03C3/064 ,  C03C3/089 ,  C03C14/00 ,  C04B35/63 ,  C04B35/64 ,  H03H7/01 ,  H05K1/09 ,  H05K1/11 ,  H05K3/46

Abstract: A mixed powder for a low temperature cofired ceramic material that contains 65 to 80 parts by weight of SiO2, 5 to 25 parts by weight of BaO, 1 to 10 parts by weight of Al2O3, 0.1 to 5 parts by weight of MnO, 0.1 to 5 parts by weight of B2O3, and 0.1 to less than 3 parts by weight of Li2O. The ceramic sintered body is used for, for example, ceramic electronic components, e.g., a multilayer circuit board or a coupler.

公开(公告)号：US09162922B2

公开(公告)日：2015-10-20

申请号：US14076353

申请日：2013-11-11

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Kazuhiro Kaneko ,  Sadaaki Sakamoto ,  Hiroshige Adachi ,  Satoru Adachi ,  Seiji Fujita

IPC: C04B35/20 ,  C04B35/443 ,  C04B35/468 ,  C03C14/00 ,  H05K1/03 ,  H01B3/12 ,  B32B18/00 ,  C04B35/462 ,  H05K1/18 ,  H05K3/46

CPC classification number: C03C14/008 ,  B32B18/00 ,  C03C3/064 ,  C03C8/02 ,  C03C14/00 ,  C03C2214/20 ,  C04B35/20 ,  C04B35/443 ,  C04B35/462 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3222 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3418 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/365 ,  C04B2235/6025 ,  C04B2235/80 ,  C04B2237/341 ,  C04B2237/343 ,  C04B2237/62 ,  C04B2237/704 ,  H01B3/12 ,  H01L2224/16227 ,  H01L2924/15192 ,  H01L2924/15313 ,  H01L2924/16251 ,  H01L2924/19105 ,  H05K1/0306 ,  H05K1/181 ,  H05K3/4629 ,  H05K2201/10371

Abstract: A glass ceramic composition that contains a first ceramic including at least one of MgAl2O4 and Mg2SiO4; a second ceramic including BaO, RE2O3 (RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0 weight % of RO (R is an alkaline-earth metal), 14.2 to 30.0 weight % of SiO2, 10.0 to 20.0 weight % of B2O3, 0.5 to 4.0 weight % of Al2O3, 0.3 to 7.5 weight % of Li2O, and 0.1 to 5.5 weight % of MgO; and MnO.

Abstract translation: 一种玻璃陶瓷组合物，其含有包含MgAl 2 O 4和Mg 2 SiO 4中的至少一种的第一陶瓷; 包括BaO，RE2O3（RE为稀土元素）和TiO2的第二陶瓷; 含有44.0〜69.0重量％的RO（R为碱土金属），14.2〜30.0重量％的SiO 2，10.0〜20.0重量％的B 2 O 3，0.5〜4.0重量％的Al 2 O 3，0.3〜7.5重量％ 的Li 2 O和0.1〜5.5重量％的MgO; 和MnO。

公开(公告)号：US20150030830A1

公开(公告)日：2015-01-29

申请号：US14456440

申请日：2014-08-11

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hiroshige Adachi ,  Seiji Fujita ,  Kazuhiro Kaneko ,  Satoru Adachi ,  Sadaaki Sakamoto

IPC: H01B3/12 ,  B32B18/00

CPC classification number: H01B3/12 ,  B32B7/02 ,  B32B18/00 ,  C03C3/064 ,  C03C4/16 ,  C03C8/20 ,  C03C12/00 ,  C04B35/20 ,  C04B35/443 ,  C04B35/462 ,  C04B35/478 ,  C04B35/62685 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3222 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/36 ,  C04B2235/6025 ,  C04B2235/80 ,  C04B2237/341 ,  C04B2237/343 ,  C04B2237/62 ,  H01G4/105 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1218 ,  H01G4/129 ,  H01G4/30 ,  H05K1/024 ,  H05K3/4629 ,  H05K3/4688 ,  H05K2201/10371 ,  Y10T428/24942

Abstract: A composite laminated ceramic electronic component that includes co-fired low dielectric-constant ceramic layers and high dielectric-constant ceramic layers. The low dielectric-constant ceramic layers and the high dielectric-constant ceramic layers are each composed of a glass ceramic containing: a first ceramic composed of MgAl2O4 and/or Mg2SiO4; a second ceramic composed of BaO, RE2O3 (where RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0 weight % of RO (where R is an alkaline-earth metal), 14.2 to 30.0 weight % of SiO2, 10.0 to 20.0 weight % of B2O3, 0.5 to 4.0 weight % of Al2O3, 0.3 to 7.5 weight % of Li2O, and 0.1 to 5.5 weight % of MgO; and MnO. The content ratios of the glass, etc. are varied between the low dielectric-constant ceramic layers and the high dielectric-constant ceramic layers.

Abstract translation: 一种复合层压陶瓷电子元件，包括共烧低介电常数陶瓷层和高介电常数陶瓷层。 低介电常数陶瓷层和高介电常数陶瓷层各自由玻璃陶瓷组成，其包含：由MgAl 2 O 4和/或Mg 2 SiO 4组成的第一陶瓷; 由BaO，RE2O3（其中RE为稀土元素）和TiO 2组成的第二陶瓷; 包含44.0至69.0重量％的RO（其中R是碱土金属），14.2至30.0重量％的SiO 2，10.0至20.0重量％的B 2 O 3，0.5至4.0重量％的Al 2 O 3，0.3至7.5重量％的玻璃 ％的Li 2 O和0.1〜5.5重量％的MgO; 和MnO。 玻璃等的含量比在低介电常数陶瓷层和高介电常数陶瓷层之间变化。

公开(公告)号：US20140362491A1

公开(公告)日：2014-12-11

申请号：US14282057

申请日：2014-05-20

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hiroshige Adachi ,  Kazuhiro Kaneko ,  Yuki Takemori

IPC: H01G4/12 ,  H01G4/40 ,  H01F27/40 ,  C04B35/64

CPC classification number: H01G4/40 ,  C03C3/064 ,  C03C3/091 ,  C03C10/0036 ,  H01F2017/0026 ,  H01G4/105 ,  H01G4/129 ,  H01G4/30

Abstract: When firing a composite substrate structured to have stacked ceramic dielectric and ceramic magnetic layers, a glass constituent is diffused from the ceramic dielectric layer to the ceramic magnetic layer to, as a result, decrease sinterability of the ceramic dielectric layer or degrade insulation resistance characteristics thereof. When the ceramic dielectric includes 40 to 80% by weight of glass formed from 35 to 50% by weight of CaO, 0 to 20% by weight of Al2O3, 5 to 20% by weight of B2O3, and 30 to 50% by weight of SiO2; and 20 to 60% by weight of at least of alumina, forsterite, and/or quartz, this problem is avoided. The dielectric composition increases the viscosity of the glass, and suppresses constituent diffusion from the ceramic dielectric layer to the ceramic magnetic layer, because the glass is partially crystallized to form wollastonite during firing.

Abstract translation: 当烧结构造为具有堆叠的陶瓷电介质和陶瓷磁性层的复合衬底时，玻璃成分从陶瓷电介质层扩散到陶瓷磁性层，结果降低陶瓷电介质层的烧结性或降低其绝缘电阻特性 。 当陶瓷电介质包含40〜80重量％的由35〜50重量％的CaO，0〜20重量％的Al 2 O 3，5〜20重量％的B 2 O 3和30〜50重量％ SiO2; 和20〜60重量％的至少氧化铝，镁橄榄石和/或石英，避免了这个问题。 电介质组合物增加了玻璃的粘度，并且抑制了从陶瓷介电层到陶瓷磁性层的组成扩散，因为玻璃在焙烧期间被部分结晶以形成硅灰石。

公开(公告)号：US20140057087A1

公开(公告)日：2014-02-27

申请号：US14067286

申请日：2013-10-30

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hiroshige Adachi ,  Kazuhiro Kaneko ,  Sadaaki Sakamoto ,  Satoru Adachi

IPC: B32B7/02 ,  B32B18/00

CPC classification number: B32B7/02 ,  B32B18/00 ,  C03C3/064 ,  C03C8/02 ,  C03C8/14 ,  C03C8/20 ,  C04B35/20 ,  C04B35/443 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3418 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/36 ,  C04B2235/365 ,  C04B2235/6025 ,  C04B2235/80 ,  C04B2237/341 ,  C04B2237/343 ,  C04B2237/62 ,  C04B2237/66 ,  H01G4/129 ,  H01G4/30 ,  Y10T428/24942

Abstract: A composite laminate ceramic electronic component that includes co-fired low dielectric constant ceramic layers and high dielectric constant ceramic layers. The low dielectric constant ceramic layers and high dielectric constant ceramic layers are each composed of a glass ceramic containing: a first ceramic composed of at least one of MgAl2O4 and Mg2SiO4; a second ceramic composed of BaO, RE2O3 (RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0% by weight of RO (R is an alkaline-earth metal), 14.2 to 30.0% by weight of SiO2, 10.0 to 20.0% by weight of B2O3, 0.5 to 4.0% by weight of Al2O3, 0.3 to 7.5% by weight of Li2O, and 0.1 to 5.5% by weight of MgO; and MnO. The content ratios of the glass, etc. are varied between the low dielectric constant ceramic layers and the high dielectric constant ceramic layers.

Abstract translation: 一种复合层压陶瓷电子元件，包括共烧低介电常数陶瓷层和高介电常数陶瓷层。 低介电常数陶瓷层和高介电常数陶瓷层各自由玻璃陶瓷组成，所述玻璃陶瓷包含：由至少一种MgAl 2 O 4和Mg 2 SiO 4组成的第一陶瓷; 由BaO，RE2O3（RE为稀土元素）和TiO2组成的第二陶瓷; 包含44.0至69.0重量％的RO（R为碱土金属），14.2至30.0重量％的SiO 2，10.0至20.0重量％的B 2 O 3，0.5至4.0重量％的Al 2 O 3，0.3 至7.5重量％的Li 2 O和0.1至5.5重量％的MgO; 和MnO。 玻璃等的含量比在低介电常数陶瓷层和高介电常数陶瓷层之间变化。

公开(公告)号：US09190211B2

公开(公告)日：2015-11-17

申请号：US14452595

申请日：2014-08-06

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Seiji Fujita ,  Hiroshige Adachi ,  Kazuhiro Kaneko ,  Satoru Adachi ,  Sadaaki Sakamoto

IPC: H01G4/10 ,  H01G4/12 ,  C04B35/20 ,  C04B35/443 ,  C04B35/462 ,  H01G4/30 ,  H01G4/40 ,  B32B18/00 ,  H01L23/552

CPC classification number: H01G4/129 ,  B32B18/00 ,  C03C3/064 ,  C03C12/00 ,  C03C14/004 ,  C04B35/20 ,  C04B35/443 ,  C04B35/462 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3222 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/36 ,  C04B2237/341 ,  C04B2237/343 ,  C04B2237/346 ,  C04B2237/62 ,  H01G4/105 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1218 ,  H01G4/30 ,  H01G4/40 ,  H01L23/552 ,  H01L2224/16225 ,  H01L2924/15192 ,  H01L2924/1531 ,  H01L2924/19041 ,  H01L2924/19105

Abstract: A composite laminated ceramic electronic component that includes co-fired low dielectric-constant ceramic layers and high dielectric-constant ceramic layers. The low dielectric-constant ceramic layers and high dielectric-constant ceramic layers are each composed of a glass ceramic containing: a first ceramic composed of MgAl2O4 and/or Mg2SiO4; a second ceramic composed of BaO, RE2O3 (RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0 weight % of RO (R is an alkaline-earth metal), 14.2 to 30.0 weight % of SiO2, 10.0 to 20.0 weight % of B2O3, 0.5 to 4.0 weight % of Al2O3, 0.3 to 7.5 weight % of Li2O, and 0.1 to 5.5 weight % of MgO; and MnO, and the content ratios of the glass, etc. are varied between the low dielectric-constant ceramic layers and the high dielectric-constant ceramic layers.

Abstract translation: 一种复合层压陶瓷电子元件，包括共烧低介电常数陶瓷层和高介电常数陶瓷层。 低介电常数陶瓷层和高介电常数陶瓷层各自由玻璃陶瓷组成，该陶瓷含有：由MgAl 2 O 4和/或Mg 2 SiO 4组成的第一陶瓷; 由BaO，RE2O3（RE为稀土元素）和TiO2组成的第二陶瓷; 含有44.0〜69.0重量％的RO（R为碱土金属），14.2〜30.0重量％的SiO 2，10.0〜20.0重量％的B 2 O 3，0.5〜4.0重量％的Al 2 O 3，0.3〜7.5重量％ 的Li 2 O和0.1〜5.5重量％的MgO; 和MnO，并且玻璃等的含量比在低介电常数陶瓷层和高介电常数陶瓷层之间变化。

公开(公告)号：US20140066283A1

公开(公告)日：2014-03-06

申请号：US14076353

申请日：2013-11-11

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Kazuhiro Kaneko ,  Sadaaki Sakamoto ,  Hiroshige Adachi ,  Satoru Adachi ,  Seiji Fujita

IPC: C03C14/00

CPC classification number: C03C14/008 ,  B32B18/00 ,  C03C3/064 ,  C03C8/02 ,  C03C14/00 ,  C03C2214/20 ,  C04B35/20 ,  C04B35/443 ,  C04B35/462 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3222 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3418 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/365 ,  C04B2235/6025 ,  C04B2235/80 ,  C04B2237/341 ,  C04B2237/343 ,  C04B2237/62 ,  C04B2237/704 ,  H01B3/12 ,  H01L2224/16227 ,  H01L2924/15192 ,  H01L2924/15313 ,  H01L2924/16251 ,  H01L2924/19105 ,  H05K1/0306 ,  H05K1/181 ,  H05K3/4629 ,  H05K2201/10371

Abstract: A glass ceramic composition that contains a first ceramic including at least one of MgAl2O4 and Mg2SiO4; a second ceramic including BaO, RE2O3 (RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0 weight % of RO (R is an alkaline-earth metal), 14.2 to 30.0 weight % of SiO2, 10.0 to 20.0 weight % of B2O3, 0.5 to 4.0 weight % of Al2O3, 0.3 to 7.5 weight % of Li2O, and 0.1 to 5.5 weight % of MgO; and MnO.

Abstract translation: 一种玻璃陶瓷组合物，其含有包含MgAl 2 O 4和Mg 2 SiO 4中的至少一种的第一陶瓷; 包括BaO，RE2O3（RE为稀土元素）和TiO2的第二陶瓷; 含有44.0〜69.0重量％的RO（R为碱土金属），14.2〜30.0重量％的SiO 2，10.0〜20.0重量％的B 2 O 3，0.5〜4.0重量％的Al 2 O 3，0.3〜7.5重量％ 的Li 2 O和0.1〜5.5重量％的MgO; 和MnO。

公开(公告)号：US10584057B2

公开(公告)日：2020-03-10

申请号：US16186253

申请日：2018-11-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kazuhiro Kaneko

IPC: C03C10/00 ,  H01B3/08 ,  H01B3/12 ,  C03C14/00 ,  C04B35/26 ,  C03C3/091 ,  C03C3/089

Abstract: A glass-ceramic-ferrite composition contains glass, a ceramic filler, and Ni—Zn—Cu ferrite. The glass contains about 0.5% by weight or more of R2O, where R is at least one selected from the group consisting of Li, Na, and K; about 5.0% by weight or less of Al2O3; about 10.0% by weight or more of B2O3; and about 85.0% by weight or less of SiO2 on the basis of the weight of the glass. The Ni—Zn—Cu ferrite accounts for about 58% to 64% by weight of the glass-ceramic-ferrite composition. The ceramic filler contains quartz and, in some cases, forsterite. The quartz accounts for about 4% to 13% by weight of the glass-ceramic-ferrite composition. The forsterite accounts for about 6% by weight or less of the glass-ceramic-ferrite composition.