Patent ID: 9018100
Filing Date: 2015-04-28
Classification: G11B

Abstract:
1. A method for depositing carbon as a chemical mechanical planarization stop layer, the method comprising: providing a first insulator; removing a portion of the first insulator to form a trench within the first insulator; depositing, using atomic layer deposition, a second insulator continuously along the trench and on portions of the first insulator beyond the trench; depositing a first patterned photo resist layer covering the trench; depositing a carbon material directly on first portions of the second insulator and the first photo resist layer using a physical vapor deposition process; removing the first photo resist layer; disposing at least one ferromagnetic material on second portions of the second insulator to form a pole comprising a portion of the ferromagnetic material within the trench; and performing a chemical mechanical planarization on the at least one ferromagnetic material using at least a portion of the carbon material as a stop for the chemical mechanical planarization.