A method and offset removing apparatus for removing DC offset from a digital baseband signal value pair included in a set of digital baseband signal value pairs is described. Each of the outermost and innermost layers is mainly made of a thermoplastic polyester resin A produced by polymerizing a dicarboxylic acid component comprising 80 mol % or higher of terephthalic acid with a diol component comprising 80 mol % or higher of ethylene glycol. The 2-D representation comprises a plurality of x and y coordinate pairs and at least one candidate scattering structure. Spacers are simultaneously applied to sidewalls of both sets of crossing lines to produce a pitch-doubled grid pattern. The invention is also directed to intermediates and processes for making these novel compounds.