▎ 摘　　要

NOVELTY - The utility model claims a pressure difference diaphragm and electron microscope, the pressure difference diaphragm used for electron microscope, comprising a diaphragm and a graphene film, wherein the diaphragm is provided with a diaphragm hole, a diaphragm hole for limiting the gas and for electronic beam passes through, graphene film is set on the diaphragm, and covering the diaphragm hole, The graphene film is used for preventing gas from passing through and for passing through the electron beam. The pressure difference diaphragm can effectively simplify the structure of the electron microscope and improve the operation convenience of the electron microscope. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an electronic microscope.