Thin film multilayer monochromators have been prepared in a specially designed RF sputtering chamber by translating a glass substrate back and forth under cathode targets made of selected materials. These monochromators have high reflectivities, and their angular acceptance and bandwidth can be selected according to experimental requirements to produce a neutron beam of desired characteristics. Multilayers are especially useful for monochromatizing long wavelength neutrons from a cold source, and for small angle scattering experiments in which Δλ/λ of about 10% is acceptable.