The monolithic, silicon, E–ΔE telescopes with 20 and 4μm thick ΔE detectors based on the n–p + –n and n–p–n structures, respectively, were produced using a new developed process named Quasi-Selective Epitaxy. The resistivity profiles of the n–p + –n and n–p–n structures are shown. The E–ΔE two-dimensional scatter plots obtained after irradiation of the monolithic E–ΔE telescopes by heavy ions and 252Cf by fission fragments are presented. Using the reaction 9Be(14N,X) with energy E(14N)=82.6MeV at the laboratory angle ϑ=20° performed at Warsaw Cyclotron the following products: He, Li, Be, B, C, N, O, F have been identified in the monolithic E–ΔE telescope with 20μm thick ΔE detector. An energy resolution of this monolithic E–ΔE telescope measured using α-particles was about 300keV.