Abstract
Research on the use of the card-type non-contact power-supply system as a powering device for the card-type portable equipment is continuing. We have developed a new transmitting coil unit that uses a Co-based amorphous ribbon instead of a ferrite substrate. This new coil unit is thin yet very flexible. The coil unit has allowed us to use a thinner card. The new unit stacks up to three 25-μm-thick ribbons, having a half of thickness of the previous unit while maintaining the same electrical characteristics.
