| 摘要 |
PROBLEM TO BE SOLVED: To provide a small chip type fuse element allowing formation of a fuse element having a sufficient length without expanding a chip size and excelling in fusing performance. SOLUTION: A series of (for instance, spiral) fuse elements are formed by stacking a plurality of boards 2a-2g on one another, by forming fuse element patterns 3b-3g on two or more layers of the boards 2a-2f, and by connecting the fuse element patterns 3b-3g to one another. The fuse element patterns 3b-3g are connected to one another through, for instance, conductive materials 5 filled in via holes 4 formed on the boards 2b-2f. It is preferable that cavities are formed at least in a part of the boards to be stacked. COPYRIGHT: (C)2007,JPO&INPIT
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