Die cast enclosure with EMC shielding teeth

摘要

An enclosure for holding a printed circuit board includes a housing portion of metal containing at least about 90% magnesium and formed by a semi-solid metal casting process of thixomolding, and including first and second housing portions each including a closed end and an open end with a plurality of teeth where the first and second portions join together in a clamshell arrangement to define an enclosed space for holding the printed circuit board. The teeth of the first housing portion may be aligned to overlap and to engage corresponding ones of the teeth of the second housing portion in physical and electrical contact for blocking electromagnetic interference (EMI) with the housing portions closed together. A method of forming a housing portion of an enclosure for holding a printed circuit board is also provided, and which includes steps of thixomolding magnesium to form the housing portion with integrally-formed teeth.