Disclosed is an improved case for an implantable medical device having an internal communication coil in which a lower-conductivity, more-radiolucent metallic plate is provided proximate to the coil. The remainder of the case can be formed of a higher-conductivity metallic material which is easier to form and thus lends itself to the manufacture of implantable medical devices with smaller cases for example. As both the plate and the remainder of the case are metallic, they can be easily joined by reliable laser welding techniques for example.
