Patent ID: 6933183

Claim:
A method of forming a FinFET, comprising the steps of: forming a set of at least one semiconducting fin on a substrate; forming a gate insulator on said set of fins; depositing a layer of gate material over said set of fins; forming a hardmask on said gate material extending perpendicular to said set of fins and having a hardmask thickness; etching said gate material outside said hardmask down to said substrate, thereby forming a gate intersecting said set of fins and defining a body region in said fins below said gate; depositing a conformal layer of insulator enclosing said gate; performing an anisotropic etch of said conformal layer, thereby exposing said set of fins while said gate remains covered by said conformal layer of insulator by depositing a source/drain material over a set of at least two fins after said anisotropic etch of said conformal layer, thereby making contact with sides of said at least two fins and forming a FinFET having at least two fins; forming source and drain regions in said fins, separated from said gate by said conformal layer of insulator; and depositing a blocking material over a set of FinFET locations and opening an aperture over a subset of locations for a first polarity of FinFETs; depositing a second conformal insulating layer over gates in said locations for a first polarity of FinFETs, said second layer having a separation thickness combined with said first layer such that dopant material in sources and drains of said first polarity of FinFETs are separated from said gates.