To provide an inverter unit with excellent manufacturing performance and with current carrying capacity increased and size reduced by further increasing the cooling efficiency of a power efficiency device. More specifically, methods and compositions for treating attention deficit disorder and attention deficit hyperactivity disorders in adults and children as well as mild cognitive impairment and dementia are provided. The substrates are attached to one another in a manner in which the conductive bumps on one substrate form an electrical contact with its respective conductive bumps on the opposing substrate without mechanical attachment. When the result of the evaluation equation \u201cAIAO>BIBO\u201d is false, the CN ratio of the other antenna is judged to be favorable.