A highly reliable semiconductor chip electrode structure allowing control of interface reaction of bonding sections even in the case of using two- or three-element solder used conventionally is disclosed. Therefore, a system error amount can be cost-effectively reduced for referencing to a multimedia document, and the reliability of searching and browsing can be increased. The delivered laser energy activates the photosensitizer accumulated in the target tissue, resulting in treatment. To allow recovery of data in such situations, associated data latches can be configured to allow the erased state storage elements to be distinguished from other data states once programming is completed.