A method includes bonding a first bond layer to a second bond layer through eutectic bonding. Slots in the base plate reside symmetrically in relation to the center of the base plate and extend along a line passing through the center of the base plate. The plate is made of plastic material and is provided with indicator markings spaced uniformly along one or both longitudinal edges of the plate so that the plate can be severed at the indicator markings to obtain plate segments of determined size. A transmitting unit for transmitting information to, and receiving information from, a remote location is provided. Further the adjacent leg of the second right triangular section is in line with the first surface and the opposite leg of the second right triangular section projects away from the second surface.