A magnetic transfer apparatus includes a holder which contains therein a master information carrier carrying thereon information to be transferred and a slave medium to which the information born by the master information carrier is to be transferred. The semiconductor wafer has a p-type substrate, a photosensing area, and at least one shallow trench surrounding the photosensing area. The etch provides a recess between proximal pairs of container capacitor structures, which recess is available for forming additional capacitance.