Patent ID: 8646318

Claim:
An improved leak sensor apparatus for sensing moisture, comprising: an adhesion layer including a first surface to be attached to a target and a second surface opposite to the first surface; a base film layer attached to the second surface of the adhesion layer; a conductive line layer on the base film layer; and a protection film layer on the conductive line layer, wherein: said conductive line layer includes a first resistance line and a second resistance line spaced apart from the first resistance line, each having a certain resistance value per unit area in a longitudinal direction, said protection film layer is provided with a plurality of holes which are formed at regular intervals, the plurality of holes includes a hole having such a size that both of the first and second resistance lines are exposed to an outside through said hole, and said conductive line layer further includes: a first conductive line whose physical orientation is in parallel with respect to the first resistance line, and a second conductive line whose physical orientation is in parallel with respect to the second resistance line; a third conductive line and a fourth conductive line that are formed in longitudinal directions in the conductive line layer; and resistance members formed between the third and fourth conductive lines at regular intervals, respectively, wherein each resistance member connects the third conductive line and the fourth conductive line.