A distribution of a content selection being distributed throughout a wireless mesh network may be tracked. In the present invention, a semiconductor film with a thickness of at most 500 \u03bcm deposited over a substrate serving as a support medium is crystallized with a CW laser light, and a chip having a semiconductor device is formed to have a total thickness of 5 \u03bcm, preferably at most 2 \u03bcm by using the crystallized semiconductor film. The first, the second, and the third terminal are configured to be connected to a phase line, a neutral line, and a protective ground line of the power line communication network, respectively. The strong internal reference is created at instantiation of the classloader object cache.