Low distortion package for a mems device including memory

A system to storing information comprising:

• a stack including:
• a media substrate including a movable media in which indicia is formed;
• a tip substrate connected with the media substrate and including a plurality of tips extending from the tip substrate;
• wherein one or more of the tips is connectable with the media to detect the indicia;
• a cap connected with the media substrate so that the movable media is arranged between the cap and the tip substrate;
• an electromagnetic motor to controllably move the movable media;
• a package to receive the stack including:
• a body having a top surface and a bottom surface;
• a plurality of conductive leads extending through the body so that the plurality of conductive leads are at least partially exposed within the package;
• a base connectable with the bottom surface;
• a lid connectable with the top surface;
• wherein the base and the lid have substantially matched thermal expansion characteristics;
• and
• wherein the base and the lid are magnetic flux return paths for the electromagnetic motor.

A method to form a package to receive a memory device including an electromagnetic motor comprising:

• molding a body on a leadframe so that a plurality of leads extend through the body and are accessible from either side of the body;
• trimming the leadframe;
• fixedly connecting a base to the body, the base being comprised of a material providing a magnetic flux return path;
• fixedly connecting the memory device to the base;
• wire bonding the plurality of leads to bond pads of the memory device;
• fixedly connecting a lid to the body, the lid being comprised of a material providing a magnetic flux return path and having thermal expansion characteristics substantially similar to the base.