Patent ID: 8969733
Filing Date: 2015-03-03
Classification: H01L,H05K

Abstract:
1. An RF device for use in an RF circuit assembly, the RF device being configured to be coupled to an RF circuit assembly interface having an interface modulus of elasticity, the device comprising: a ceramic layer including a ceramic surface area having a first ceramic major surface and a second ceramic major surface, the ceramic layer being characterized by a ceramic layer dielectric constant, a ceramic layer thickness, and a ceramic modulus of elasticity, the ceramic layer also including an RF circuit arrangement having a predetermined geometry and predetermined electrical characteristics, the ceramic layer being configured to dissipate thermal energy generated by the RF circuit via substantially the entire ceramic surface area; and a first dielectric layer including a first outer major surface configured to be coupled to the RF circuit assembly interface and a first inner major surface coupled to the second ceramic major surface, the first dielectric layer having a predetermined first thickness, a first dielectric constant and a predetermined first modulus of elasticity, the predetermined electrical characteristics of the RF circuit arrangement being a function of the ceramic layer dielectric constant, the ceramic layer thickness, the first dielectric constant, the predetermined first thickness and the predetermined geometry, the predetermined first modulus of elasticity being substantially lower than the interface modulus of elasticity and the ceramic modulus of elasticity such that the first dielectric layer substantially conforms to the ceramic layer and the RF circuit assembly interface when an RF device operating temperature cycles between a maximum and minimum value.