| 摘要 |
An electrical sheet heater has a heat generating semiconductor pattern on an electrically insulating substrate and a thermal fuse (e.g., a fuse that is responsive to temperature rather than current) attached to the heater in close proximity to the semiconductor pattern and connected in series with the semiconductor pattern. The fuse includes a low temperatures melting point conductor sandwiched between a pair of insulating sheets and overlying at least one recess in one of the sheets. The conductor will sag or flow into the recess and break when the temperature of the wire exceeds the solidus temperature of the wire.
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