Abstract: An electrolyte membrane roll body to be used in a manufacturing apparatus for membrane electrode assemblies allows effective use of an electrolyte membrane in the manufacturing apparatus. A first end of a lead film and a first end of a lead film supporting base that is peelably bonded to the lead film are connected to a roll core around which an electrolyte membrane sheet and a back sheet for supporting the electrolyte membrane sheet are rolled. A terminal end of the electrolyte membrane sheet and a terminal end of the back sheet are connected to a second end of the lead film and a second end of the lead film supporting base, respectively.

Abstract: A plasma apparatus configured to form a film on or etch a work piece includes: a vacuum chamber including a first casing that has a first recess and a first flat part disposed around the first recess, and a second casing disposed opposite to the first casing; an insulating member that is disposed between the first flat part of the first casing and the second casing, and is configured to contact with the work piece in a state where the work piece faces a space inside the first recess and is separated from the first flat part; and an electricity application unit that is configured to apply electricity to the work piece, wherein a distance between the first flat part and a contact point between the work piece and the insulating member is shorter than a distance between the work piece and a bottom part of the first recess.

Abstract: The present invention provides an electrolyte membrane roll body to be used in a manufacturing apparatus for membrane electrode assemblies which allows effective use of an electrolyte membrane in the manufacturing apparatus.