Patent ID: 6069084
Filing Date: 2000-05-30
Classification: H01L,Y10S,Y10T

Abstract:
A method of forming a low-k layer in an integrated circuit, comprising:depositing a low-k layer comprising a tetrafluoroethylene/2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxol copolymer on a partially completed integrated circuit, wherein the low-k layer has an exposed face;dry etching the exposed face of the low-k layer;depositing a photoresist layer on the etched, exposed face of the low-k layer;patterning the photoresist layer to expose portions of the low-k layer;depositing a mask layer on the patterned photoresist layer and exposed portions of the low-k layer;removing the patterned photoresist layer and the portions of the mask layer overlying the patternened photoresist layer; anddry etching the integrated circuit to remove the low-k layer except in areas underlying the mask layer, whereby a patterned low-k layer is formed.