Electrochemical deposition analysis system including high-stability electrode
First Claim
1. A system for determining concentrations of organic components in plating compositions for electrochemical deposition of copper, said system comprising a measurement chamber having disposed therein a ruthenium electrode having a plating surface on which copper is depositable by electroplating and from which deposited copper is strippable, in respective deposition and stripping steps of an operational cycle of said system when the measurement chamber contains an electrolyte solution, and electrical circuitry operatively coupled with the ruthenium electrode and arranged for conducting said operational cycle of the system.
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Accused Products
Abstract
A system and method for determining concentration of one or more components of interest in a copper electroplating solution, involving repetitive electroplating and stripping of copper, in which a ruthenium electrode is employed as a substrate for such electroplating and stripping steps. The concentration determination may be carried out by pulsed cyclic galvanostatic analysis (PCGA) or other methodology, to determine levels or accelerator and/or suppressor components of the plating bath chemistry.
104 Citations
21 Claims
- 1. A system for determining concentrations of organic components in plating compositions for electrochemical deposition of copper, said system comprising a measurement chamber having disposed therein a ruthenium electrode having a plating surface on which copper is depositable by electroplating and from which deposited copper is strippable, in respective deposition and stripping steps of an operational cycle of said system when the measurement chamber contains an electrolyte solution, and electrical circuitry operatively coupled with the ruthenium electrode and arranged for conducting said operational cycle of the system.
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11. A method of determining concentrations of organic components in plating compositions for electrochemical deposition of copper, said method comprising:
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providing a system including a measurement chamber having disposed therein a ruthenium electrode having a plating surface on which copper is depositable by electroplating and from which deposited copper is strippable, in respective deposition and stripping steps of an operational cycle of said system when the measurement chamber contains an electrolyte solution, and electrical circuitry operatively coupled with the ruthenium electrode and arranged for conducting said operational cycle of the system;
introducing electrolyte solution and plating composition components into said measurement chamber as required for said operational cycle; and
actuating said electrical circuitry to conduct said operational cycle. - View Dependent Claims (12, 13, 14, 15, 16)
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- 17. A method of plating and stripping copper to determine concentration of a component of interest in a copper electroplating solution, said method comprising using a ruthenium electrode as a copper deposition and stripping substrate.
- 19. A method of maintaining stable operation in a system for determining concentration of one or more components of interest in a copper electroplating solution, involving repetitive electroplating and stripping of copper, said method comprising using a ruthenium electrode as a substrate for said electroplating and stripping of copper.
Specification