A medical device is provided comprising a transcutaneous device unit and a reservoir unit. The system may also be used to uniquely identify the user. A solder layer made of AuSn alloy is formed at least on one Sn absorption layer of the first and second Sn absorption layers. The strong RF electric field may be a short-range field that provides significant RF energy only over a relatively short distance, when compared with traditional RF fields that are set up over a relatively large distance. The invention also relates to a method for the production of the coating. The primary heat dissipation module includes at least one silicon-based heat dissipation device disposed on the at least one heat-generating device.