password varying within the decimal number (i.e., from 0 to 9). Figure 16(e) shows the corresponding output signals for the coding information of "53219078", together with step-by-step sliding indications on the respective directions. Examples Example 1 As shown in Figure 2(a), a sensor device 10 was fabricated with electrodes formed from HPE. The HPE was then examined under stretched motion by a linear motor. I n the stretching process, the resistance range was about 18 - 30 based on an applied voltage of 1.5 V. The electrical characteristics curve is shown in Figure 2(c). It can be seen that the electrode material still exhibits good electrical conductivity under a stretchable state up t o 200% strain. Demonstration and test curves of its electrical conductivity are shown in Figure 22. Dimensions of the 2D sensor 10 are listed in Table SI. Table SI . Dimensions of the sensor Parameter Name Value Length of device 80 mm Width of device 80 mm Length of each electrode 70 mm Width of each electrode 10 mm Width of grid line 2 mm Thickness of grid line 1.5 mm Side length of each small lattice 10 mm Thickness of electrode 1.5 mm Thickness of silicone rubber 2 mm