Patent ID: 9318578
Filing Date: 2016-04-19
CPC Classification: H01L

Claim Text:
1. A method of forming at least one finFET, said method comprising: forming at least two fins of semiconductor material on a substrate by a spacer image transfer process; forming a gate stack across one fin of said at least two fins; conformally depositing a blanket layer of spacer material on said fins, gate stack and substrate; performing an anisotropic etch process to etch spacer material deposited in said step of conformally depositing said spacer material to form sidewall spacers; performing angled ion impurity implants into said spacer material on both sides of said fins in a direction substantially parallel to sides of said gate stack to engender etch selectivity in said spacer material on sides of said fins relative to spacer material on sides of said gate stack, wherein said angled ion impurity implants are performed before said anisotropic etch; etching said spacer material to remove said spacer material damaged by said angled impurity implants from said semiconductor material on major portions of sides of said at least two fins selectively to said spacer material on said gate stack, leaving spacer material on said gate stack; and performing epitaxial growth of semiconductor material on both sides of said at least two fins proximate to ends of said fins where said fins are exposed by said etching of said spacer material.