| 摘要 |
A semiconductor device and process for making the same are disclosed which use embedded pillars to prevent damage (e.g. dishing, smearing, overetching) to damascene conductors, particularly large conductors. For example, a channel may be formed in an insulating layer such that one or more insulating pillars within the channel are left intact during channel etching. A conductive film may be deposited over the insulating layer, preferably largely comprised of low-resistivity, relatively soft materials such as Al, Cu, or Al-Cu alloys. Chemical-mechanical polishing is then used to remove portions of the conductive film overlying non-channeled areas of the insulating layer to form an inlaid conductor. It has been found that wide conductors or pads may experience much more damage than narrow conductors during polishing. Pillars may therefore be used in a wide conductor to control polish damage to such a conductor. <IMAGE> |
