A bipolar transistor includes a Si single crystalline layer serving as a collector, a single crystalline SiSiGeC layer and a polycrystalline SiSiGeC layer which are formed on the Si single crystalline layer, an oxide film having an emitter opening portion, an emitter electrode, and an emitter layer. The users can execute the custom search or search macro to return search results. The organic light emitting element is on the main plate. The clockfrequency reference is intentionally offset by fractional frequency resulting in a beat frequency when compared to the incoming data.