Patent ID: 6090714
Filing Date: 2000-07-18
Classification: H01L

Abstract:
A method for forming a planarized trench fill layer within a trench within a substrate comprising:providing a substrate having a trench formed therein;forming over the substrate and at least partially filling the trench a blanket first trench fill layer formed employing a high density plasma chemical vapor deposition (HDP-CVD) method;forming upon the blanket first trench fill layer a blanket second trench fill layer formed employing a subatmospheric pressure thermal chemical vapor deposition (SACVD) method employing ozone as an oxidant source material and tetraethylorthosilicate (TEOS) as a silicon source material; andplanarizing while employing a chemical mechanical polish (CMP) planarizing method the blanket second trench fill layer and the blanket first trench fill layer to form a patterned planarized trench fill layer within the trench.