Diamond membranes are capable of amplifying electron flux, but membranes with dimensions exceeding 10 mm2 are subject to deformation and sagging. In order to avoid this, it is suggested to build electron flux amplifier on a silicon grating coated with a diamond film. The possibility of using these gratings instead of microchannel plates is discussed, in particular, in cases where this grating directly plays the role of X-ray, UV, or proton detector.