The present invention relates to a solid electrolytic capacitor having a masking structure in which the insulation between the anode part and the cathode part can be ensured without fail, to its production method, to a method for coating a masking agent on a solid electrolytic capacitor substrate, and to apparatus therefore. When a POST request is received, it is transformed into a GET request with an identifying tag. The self-test circuitry includes an AC self-test controller and a clock splitter. By delaying log updating until a certain number of transactions have transpired, memory seeks can be reduced, significantly improving performance. The strainer, in one embodiment, is incorporated in a removable basket. The processing unit determines an objective function based on a sum of data throughput across data links satisfying demands.