Functionality change based on stress-engineered components
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United States of America Patent
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Aug 31, 2021
Grant Date -
Jun 4, 2020
app pub date -
Nov 29, 2018
filing date -
Nov 29, 2018
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Abstract
A device includes at least one stress-engineered portion and at least one second portion. The stress-engineered portion includes at least one tensile stress layer having a residual tensile stress and at least one compressive stress layer having a residual compressive stress. The tensile stress layer and the compressive stress layer are mechanically coupled such that the at least one tensile stress layer and the at least one compressive stress layer are self-equilibrating. The stress-engineered portion is configured to fracture due to propagating cracks generated in response to energy applied to the stress-engineered portion. Fracture of the stress-engineered portion changes functionality of the device from a first function to a second function, different from the first function.
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