Title:
コバルト含有合金による銅の選択的自己開始無電解キャッピング
Document Type and Number:
Japanese Patent JP4597135
Kind Code:
B2
Abstract:
Embodiments of the invention generally provide compositions of plating solutions, methods to mix plating solutions and methods to deposit capping layers with plating solutions. The plating solutions described herein may be used as electroless deposition solutions to deposit capping layers on conductive features. The plating solutions are rather dilute and contain strong reductants to self-initiate on the conductive features. The plating solutions may provide in-situ cleaning processes for the conductive layer while depositing capping layers free of particles. In one embodiment, a method for forming an electroless deposition solution is provided which includes forming a conditioning buffer solution with a first pH value and comprising a first complexing agent, forming a cobalt-containing solution with a second pH value and comprising a cobalt source, a tungsten source and a second complexing agent, forming a buffered reducing solution with a third pH value and comprising a hypophosphite source and a borane reductant, combining the conditioning buffer solution, the cobalt-containing solution and the buffered reducing solution to form the electroless deposition solution. The electroless deposition solution includes the cobalt source in a concentration range from about 1 mM to about 30 mM, the tungsten source in a concentration range from about 0.1 mM to about 5 mM, the hypophosphite source in a concentration range from about 5 mM to about 50 mM, the borane reductant in a concentration range from about 5 mM to about 50 mM, and has a total pH value in a range from about 8 to about 10.
Inventors:
Wideman, Timothy
Zoo, zize
Zoo, zize
Application Number:
JP2006535421A
Publication Date:
December 15, 2010
Filing Date:
October 18, 2004
Export Citation:
Assignee:
APPLIED MATERIALS,INCORPORATED
International Classes:
B05D1/18; C23C18/50; C23C18/16; C23C18/18; C23C18/31; C23C18/34; C23C18/36; C23C18/40; C23C18/44; C23C18/48; C23C18/52; H01L21/288; H01L21/768
Domestic Patent References:
| JP2001355074A | ||||
| JP2001316834A | ||||
| JP2003193246A | ||||
| JP8264372A |
Foreign References:
| US20030113576 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yuichi Yamada
Yuichi Yamada