Patent ID: 7829262
Filing Date: 2010-11-09
Classification: H01L

Abstract:
1. A method of forming electrical contacts comprising: providing an insulating layer overlaid by multiple layers of masking material; creating a series of selectively definable lines in the masking material having a first pattern; performing pitch-reduction on the lines using a spacer material to create pitch-reduced spacers, elongate along a spacer axis, separated by pitch-reduced spaces, wherein performing pitch-reduction on the lines comprises: applying a second, crossing pattern of photoresist over a portion of the spacers, said crossing pattern having a window that leaves multiple portions of the spacers and adjacent pitch-reduced spaces uncovered by the photoresist, said window having an elongate axis that is not parallel to the elongate axis of the spacers, wherein applying the second, crossing pattern of photoresist exposes sidewalls of the spacers within the window; etching the insulating layer through a third pattern defined by the pitch-reduced spaces to create contact vias in the insulating layer; and filling said contact vias with a conductive material to create electrical contacts.