The technology and performance of long-wave 2048-elements linear HgCdTe focal plane array were reported. The n-on-p photodiodes were fabricated by planar ion implantation and hybridized with readout circuit by indirect flip chip technique. The 2048-elements linear array consists of 8 segments of 256-element linear arrays that are “butted” on a single substrate in a staggered format. The cut off wavelength and R 0 A of the photodiode are 9.9μm and 10 Ωcm 2 , respectively. The average detectivity of the 2048-elements linear array is 9.3×10 10 cmHz 1/2 W -1 . The ununiformity of response is 8%. The array peak operability is larger than 99.5%.