Patent ID: 6287963
Filing Date: 2001-09-11
Classification: C23C,H01L

Abstract:
A method for forming an aluminum contact in an integrated circuit, comprising the steps of:forming an insulating layer over a conducting layer;forming an opening through the insulating layer to expose a portion of the conducting layer;forming a layer including a refractory metal over the insulating layer, and sidewalls and a bottom of the opening;raising the temperature of the integrated circuit from below approximately 350.degree. C. to a value between approximately 400.degree. C. and approximately 500.degree. C.;during said step of raising the temperature, beginning to deposit aluminum on the layer including the refractory metal and in the opening;after said step of raising the temperature, continuing said step of depositing aluminum, wherein aluminum is deposited at a temperature of between approximately 400.degree. C. and approximately 500.degree. C.;during said steps of beginning to deposit aluminum and continuing depositing aluminum, controlling the rate at which aluminum is deposited to allow the deposited aluminum to migrate into the opening so as to provide a substantially complete fill thereof; andperiodically interrupting said continuing step for a first time period.