Patent ID: 9435704
Filing Date: 2016-09-06
CPC Classification: G01L

Claim Text:
1. A method for determining whether or not a shock was applied to a shock recording device, the method comprising: (a) preparing the shock recording device comprising: a vibration energy harvester comprising a first electrode and a second electrode, the vibration energy harvester converting an energy of a shock applied thereto into a potential difference between the first electrode and the second electrode; and a ferroelectric transistor comprising a gate electrode, a source electrode, and a drain electrode, the ferroelectric transistor further comprising a stacked structure of a ferroelectric layer and a semiconductor layer, wherein the gate electrode is electrically connected to the first electrode; and the source electrode is electrically connected to the second electrode; (b) measuring a resistance value of the semiconductor layer through the drain electrode and the source electrode; and (c) determining whether or not a shock was applied to the shock recording device based on the resistance value, and wherein the shock recording device further comprises a zener diode which is electrically connected to the source electrode and the drain electrode.