Low-voltage varistor, circuit board, semiconductor component package, and interposer

Patent metadata

Field	Value
Publication number	US-12534591-B2
Application number	US-202117908820-A
Country	US
Kind code	B2
Filing date	Mar 1, 2021
Priority date	Mar 2, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A low-voltage varistor includes a cured body of a resin composition for forming the low-voltage varistor. The resin composition includes: (A) at least one selected from carbon nanotubes and carbon aerogels; and (B) at least one selected from epoxy resin and acrylic resin.

First claim

The invention claimed is:

1 . A low-voltage varistor comprising a cured body of a resin composition for forming the low-voltage varistor,
wherein the resin composition for forming the low-voltage varistor comprises:
(A) carbon nanotubes, or carbon nanotubes and carbon aerogel; and
(B) at least one selected from epoxy resin and acrylic resin, and
wherein a content of the carbon nanotubes in the resin composition is 0.01 to less than 0.05 parts by weight, based on 100 parts by weight of the component (B) and wherein a capacitance of the low-voltage varistor is 0.5 to 200 pF.

2 . The low-voltage varistor according to claim 1 , wherein a varistor voltage is 0.3 to 10 V when an inflow current of the low-voltage varistor is 0.1 mA.

3 . The low-voltage varistor according to claim 1 , wherein a non-linear coefficient of the low-voltage varistor α is 7 to 20 when a current-voltage characteristic of the low-voltage varistor is expressed by I=KV α , where V is an applied voltage, I is an inflow current, K is a constant, and α is the non-linear coefficient.

4 . A circuit board equipped with the low-voltage varistor according to claim 1 .

5 . A semiconductor component package comprising the low-voltage varistor according to claim 1 .

6 . An interposer equipped with the low-voltage varistor according to claim 1 .

7 . A low-voltage varistor comprising a cured body of a resin composition for forming the low-voltage varistor,
wherein the resin composition for forming the low-voltage varistor comprises: (A) carbon aerogel; and (B) at least one selected from epoxy resin and acrylic resin and wherein a capacitance of the low-voltage varistor is 0.5 to 200 pF.

8 . The low-voltage varistor according to claim 7 , wherein a varistor voltage is 0.3 to 10 V when an inflow current of the low-voltage varistor is 0.1 mA.

9 . The low-voltage varistor according to claim 7 , wherein a non-linear coefficient of the low-voltage varistor α is 7 to 20 when a current-voltage characteristic of the low-voltage varistor is expressed by I=KV α , where V is an applied voltage, I is an inflow current, K is a constant, and α is the non-linear coefficient.

10 . The low-voltage varistor according to claim 7 , wherein a content of the carbon aerogel in the resin composition is 0.1 to 10 parts by weight based on 100 parts by weight of component (B).

11 . The low-voltage varistor according to claim 7 , wherein the carbon aerogel is porous carbon, and the porous carbon has an I D /I G of 2.0 or more in a Raman spectrum measured by Raman spectroscopy, where I G is an accumulated intensity of a peak for G band around 1590 cm-1, and I D is an accumulated intensity of a peak for D band around 1350 cm-1.

12 . The low-voltage varistor according to claim 11 , wherein the carbon aerogel is porous carbon, and the porous carbon has an M D /M G of 0.80 or more in a Raman spectrum measured by Raman spectroscopy, where M G is a maximum intensity of a peak for the G band, and M D is a maximum intensity of a peak for the D band.

13 . A circuit board equipped with the low-voltage varistor according to claim 7 .

14 . A semiconductor component package comprising the low-voltage varistor according to claim 7 .

15 . An interposer equipped with the low-voltage varistor according to claim 7 .

Assignees

• Namics Corp

Inventors

• Kamata Yoshitaka
• Sato Toshiyuki

Classifications

• H05K2201/10196

  Variable component, e.g. variable resistor · CPC title

• H05K1/18

  structurally associated with non-printed electric components (H05K1/16 takes precedence) · CPC title

• H01L2223/6661

  Electricity · mapped topic

• H01L23/66

  Electricity · mapped topic

• H01L23/62

  Electricity · mapped topic