The invention relates to an electronic circuit comprising: a first random-access data storage element, a processing module designed to delete the first storage element, and an access terminal which is connected to the processing module and receives a first power signal supplied by a first power source external to the electronic circuit. The device includes a substrate where a conductive region is formed and an interlayer insulating layer. The above method can be suitably used for forming an inorganic coating film excellent in transparency, surface hardness, gas-barrier property and the like on any type of resin substrate with good adhesion property. The two communications devices may communicate with two more communications devices such as those of a service provider network that also have Ethernet connections aggregated at an Ethernet switch to provide access to an Ethernet network for a subscriber. The fastening layer comprises a base portion and an axially inner portion to have a L-shaped cross section. A variety of shapes and colorful patterns for advertisement can be formed by the stickers having predetermined patterns andor the ball assembly having a predetermined pattern.