Inventors:
Lakshman Rathnam - Mountain View CA
Herbert Kraus - Orange CA
Dubravko Babic - Palo Alto CA
Assignee:
Emcore Corporation - Somerset NJ
International Classification:
H05K 900
US Classification:
361818, 361800, 361816, 714 35, 714 51 R, 439939, 439607
Abstract:
An improved electromagnetic interference shield for a module includes springs in which the compression force pushes the springs in a direction that is approximately parallel to the optic axis. The springs allow significantly looser tolerances on the placement of the module on its associated printed circuit board. The shield also includes an opening near its center, the edge of which includes a plurality of teeth. When the shield is placed onto the module, the teeth bend along the negative optic axis direction and prevent the shield from being pulled away from the module. Accidental removal of the shield is thus prevented. The shield splits the enclosure ground from the internal signal ground, decreasing the capacitance between them, in turn decreasing another possible source of electromagnetic radiation. In addition, the shield is more cost efficient to manufacture since it only requires a one step assembly process.
