Patent ID: 8410601

Claim:
An RF package, comprising: a substrate mountable on a base plate; a non-conductive cover overlying the substrate and including: a recess configured to receive the substrate, the recess forming a stress distribution surface area to engage and press outer edge portions of opposite sides of the substrate against the base plate; one or more tapered lower surfaces extending from the recess toward outer edge portions of the cover; one or more stepped source leads extending from at least one of a pair of opposite sides of an upper surface of the substrate to the one or more tapered lower surfaces of the cover; one or more gate and drain leads extending from at least one of a pair of opposite sides of an upper surface of the substrate; one or more dies disposed on the substrate; one or more conductors electrically coupling the one or more gate leads, drain leads, and stepped source leads to the one or more dies; and a cavity disposed within the cover to receive the one or more dies, the one or more conductors, and at least portions of the one or more gate leads, drain leads, and stepped source leads, wherein the cover further includes: a first section having a first thickness between the cavity and the top surface of the cover to provide rigidity to the central portion of the cover; one or more additional sections having a second thickness between the cavity and the top surface of the cover, the second thickness less than the first thickness; and a curved section connecting the first section to the one or more additional sections, wherein the one or more additional sections and the curved section are configured to evenly distribute stress of the cover during preferential deformation thereof when securing the one or more stepped source leads and the substrate to the base plate.