Abstract: Provided is a technique capable of adjusting an angle of incidence of ions. Provided is a ring assembly including: a conductive edge ring; an insulating annular member including at least an inner peripheral portion disposed on the edge ring; and a conductive member disposed on at least a portion of an upper surface of the annular member overlapping with the edge ring in top plan view.

Abstract: A broadcasting facsimile transceiver has a transmission controller which, in the broadcasting mode, inhibits broadcasting communications during a predetermined interval of time ranging from the completion of transmission to a destination to the commencement of transmission to the succeeding destination. The transceiver also includes a scanning unit for reading a document and delivering video data, a data compression unit for compressing the video data, a memory unit for storing compressed video data from said data compression unit, a reproduction unit for reading the compressed video data stored in said memory unit, a MODEM for transmitting the video data to a communication line.