Patent ID: 7381583

Claim:
The wafer scale, fabrication and packaging integrated, moderate temperature method of making a hermetically sealed transmission line coupled radio frequency MEMS switch comprising the steps of: forming an assemblage of operationally static, coupled, metallic elements of said transmission line and switch in each die location across a surface of an insulating wafer substrate member; disposing an electrical insulating coating of closed switch capacitance determining thickness over selected of said operationally static, coupled, metallic elements of said transmission line and switch in each said die location of said insulating wafer substrate member; coating said insulating substrate member and electrical insulating coated operationally static, coupled metallic elements with a three sub layer comprised removable first photoresist sacrificial layer in each said die location of said insulating wafer substrate member; depositing a shaped thin metal film movable switch element on a top surface of said removable first photoresist sacrificial layer in each said die location of said insulating wafer substrate member; covering said shaped thin metal film movable switch element and said three sub layer comprised removable first photoresist sacrificial layer with a three sub layer comprised removable second photoresist sacrificial layer in each said die location of said insulating wafer substrate member; enclosing said three sub layer comprised removable second photoresist sacrificial layer, said shaped thin metal film movable switch element and said three sub layer comprised removable first photoresist sacrificial layer in a permanent dielectric shell member in each said die location of said insulating wafer substrate member; said permanent dielectric shell member including a plurality of apertures communicating from within to external of said dielectric shell member in each said die location of said insulating wafer substrate member; extracting said removable sacrificial layers materials from within each said permanent dielectric shell member using a dissolving liquid process communicating via said dielectric shell member plurality of apertures in each said die location of said insulating wafer substrate member; encasing said permanent dielectric shell member with a layer of protecting and sealing material in each said die location of said insulating wafer substrate member; segregating said insulating wafer substrate member into a plurality of individual sealed switch-inclusive dice.