Patent ID: 8323471
Filing Date: 2012-12-04
Classification: C25D,H01L

Abstract:
1. A method of automatic deposition profile targeting for electrochemically depositing copper with a position-dependent controllable plating tool, comprising the steps of: receiving a first pattern density for wafers to be processed in the plating tool in a computing apparatus, wherein the wafers have a first product and layer combination; initializing a first sensitivity matrix for an advanced process control (APC) control model in the computing apparatus based on the first pattern density and a second sensitivity matrix associated with a second product and layer combination different from the first product and layer combination prior to operating the APC model on measurement data associated with wafers having the first product and layer combination, wherein the second product and layer combination has a second pattern density different than the first pattern density; receiving measurement data in the computing apparatus representing an actual thickness profile of copper deposited on a patterned product wafer having the first product and layer combination; feeding the measurement data to the APC model implemented by the computing apparatus; and calculating individual corrections for plating parameters in the position-dependent controllable plating tool in the computing apparatus using the APC model and the first sensitivity matrix, wherein the corrections are calculated based on a difference between the actual thickness profile and a deposition profile target.