The present disclosure relates to a semiconductor body etching apparatus having a multi-zone end point detection system. The films include a water soluble film-forming polymer, such as pullulan, and a taste masked pharmaceutically active agent, such as dextromethorphan. The lamp-side connector is provided at a rear end portion of the plug body. In implementations, the revocation service can communicate a revoked list to a client device to enable the client device to maintain an updated list of revocation information.