Patent ID: 6794298
Filing Date: 2004-09-21
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, the method comprising:forming a first dielectric layer on a substrate; forming a first patterned conductive layer having gaps on the first dielectric layer, the first patterned conductive layer comprising a first conductive feature having an upper surface and side surfaces; depositing a dielectric gap fill layer so fill the gaps; depositing a second dielectric layer on the first patterned conductive layer and on the gap fill layer, wherein the as-deposited gap fill layer and/or second dielectric layer have a dielectric constant no greater than about 3; forming a photoresist mask on the second dielectric layer; forming a through-hole in the second dielectric layer exposing the upper surface of the first conductive feature; and removing the photoresist mask and cleaning the through-hole with a plasma containing carbon tetrafluoride (CF4) and water vapor (H2O) such that the dielectric constant of the as deposited gap fill layer and/or the second dielectric layer does not increase more than about 15%.