A device including a near field transducer ; a write pole; at least one dielectric material positioned between the NFT and the write pole; and an adhesion layer positioned between the NFT and the at least one dielectric material. The device consists of four major components or assemblies, these being a tapered cylindrical container, a container top assembly, a handle assembly, and a mixing disk carried by the handle assembly. The protective circuit is operable to protect the integrated circuit from damage due to electrostatic discharge and may be coupled to the input element.