In this paper, we discuss the phase-change recording at a short-wavelength (514 nm) and a high numerical aperture (0.85). Effects of recording power and pulse width on the size of the recording marks are studied. The minimum recording mark with a length of approximately 220 nm has been observed. The capacity of about 17 GB for a single-layer disc of a 12 cm diameter can be obtained. The maximum carrier-to-noise ratio reaches 45 dB at a writing power of 13-14 mW.