Protective element
First Claim
1. A protective element, comprising a heat-generating member and a low-melting metal member on a substrate, in which the low-melting metal member is blown out by the heat generated by the heat-generating member, wherein there is provided a region in which the low-melting metal member is suspended over the underlying base, and when S (μ
- m2) is the surface area of a lateral cross section of the low-melting metal member between a pair of low-melting metal member electrodes sandwiching said region, and H (μ
m) is the height at which the suspended region is suspended, then H/S≧
5×
10−
5.
3 Assignments
0 Petitions
Accused Products
Abstract
A protective element with improved spherical segmentation performance during the melting of a low-melting metal member, has a heat-generating member and a low-melting metal member on a substrate, in which the low-melting metal member is heated and blown out by the heat generated by the heat-generating member. There is a region in which the low-melting metal member is suspended over the underlying base (such as an insulating layer), and when S (μm2) is the surface area of a lateral cross section of the low-melting metal member 4 between a pair of low-melting metal member electrodes 3a and 3b or 3b and 3c sandwiching the region, and H (μm) is the height at which the suspended region is suspended, then the relationship H/S≧5×10−5 is satisfied. It is preferable here that the upper surfaces of both of the pair of low-melting metal member electrodes protrude beyond the upper surface of the underlying insulating layer. Alternatively, it is preferable that there is a height differential between the upper surfaces of the pair of low-melting metal member electrodes, and the low-melting metal member is inclined between the pair of low-melting metal member electrodes.7
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Citations
4 Claims
-
1. A protective element, comprising a heat-generating member and a low-melting metal member on a substrate, in which the low-melting metal member is blown out by the heat generated by the heat-generating member,
wherein there is provided a region in which the low-melting metal member is suspended over the underlying base, and when S (μ - m2) is the surface area of a lateral cross section of the low-melting metal member between a pair of low-melting metal member electrodes sandwiching said region, and H (μ
m) is the height at which the suspended region is suspended, then H/S≧
5×
10−
5. - View Dependent Claims (2, 3, 4)
- m2) is the surface area of a lateral cross section of the low-melting metal member between a pair of low-melting metal member electrodes sandwiching said region, and H (μ
Specification