Carbon-coated ceramic based electrode arrays having a ceramic substrate patterned with multiple recording sites are provided. Payment from third parties for their access to the forum and files may be directly to server clients or to the multi-channel forum if there is an agreement with the forum to manage payments and pay server clients a producer’s share of revenue. The contoured honeycomb seal may include a first step with a first shape and a second step with a contoured shape. A second SEG process may be performed to form a second plug filling the first opening. A via hole conductor is provided in the antenna coil such that the length of a current path thereto from the end portion is the shortest among a plurality of via hole conductors.