The present invention relates to a method of determining the genotype of a sample polynucleotide having at least a first variant site. The dielectric structure includes: a first oxide layer; a first high-k dielectric film formed on the first oxide layer, wherein the first high-k dielectric film includes one selected from materials with a dielectric constant of approximately 9 or higher and a compound of at least two of the materials; and a second oxide layer formed on the first high-k dielectric film. The images are stored so as to be indexed according to their unique identifiers. More specifically, when the half-rate CDR circuit is in a locked condition, both the rising and falling edges of the clock signal are aligned with the baud center of the received data signal. Thus, the filament voltage is controlled to be a predetermined voltage of a rated value or less. The invention futher discloses methods of preparing compounds of the invention.