An information processor of a high reliability and a high recording density, and a blue color, blue-violet color and violet color based semiconductor light emitting device operable at a low threshold current density, used for the same, are provided. The cover coat 14 is formed with an uppermost over coat 19 covering a region where the auxiliary upper electrodes 15 overlap the cover coat 14, whereby the upper electrodes 13 and the auxiliary upper electrodes 15 are protected from migration caused by sulfur gases. , a set of nucleic acid sequence fragments from a single genome, with one or more unique members of a collection of oligonucleotide tags, or sequence tokens, which, in turn, can be identified using a variety of readout platforms.