US4272335A
Expired / Lapsed
US
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Composition and method for electrodeposition of copper
Assignee: OMI International Corp
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Filing: 1980-02-19
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Granted: 1981-06-09
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Expires: 2000-02-19
Abstract
Abstract A composition and method for electrodepositing ductile, bright, level copper deposits from an aqueous acidic copper plating bath having dissolved therein a brightening amount of a compound comprising a substituted phthalocyanine radical. In accordance with a preferred embodiment, the composition and method further includes in the copper plating bath secondary brightening agents including aliphatic polysulfides and/or organic sulfides and/or polyethers, as well as other known additives for acid copper plating baths.
Inventors
- 👤 Daniel J. Combs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:40
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
53 words
In a bath for the electrodeposition of copper, which bath comprises an aqueous acidic solution containing copper in an amount sufficient to electroplate copper on a substrate, the improvement which comprises including in said bath a brightening amount sufficient to produce a bright copper electrodeposit, of a compound comprising a substituted phthalocyanine radical.
Claim 2
Dependent Claim
53 words
In a bath for the electrodeposition of copper, which bath comprises an aqueous acidic solution containing copper in an amount sufficient to electroplate copper on a substrate, the improvement which comprises including in said bath a brightening amount sufficient to produce a bright copper electrodeposit, of a compound comprising a substituted phthalocyanine radical.
Claim 3
Dependent Claim
150 words
The bath as defined in claim 1 in which said compound corresponds to the structural formula: Pc--(X).sub.n Wherein: Pc is a phthalocyanine radical; X is --SO 2 NR 2 , --SO 3 M, --CH 2 SC(NR 2 ) 2 + Y - ; R is H, alkyl containing 1-6 carbon atoms, aryl containing 6 carbon atoms, aralkyl containing 6 carbon atoms in the aryl portion and 1 to 6 carbon atoms in the alkyl portion, heterocyclic containing 2 to 5 carbon atoms and at least 1 nitrogen, oxygen, sulfur or phosphorus atom, and alkyl, aryl, aralkyl and heterocyclic, as defined above, containing 1 to 5 amino, hyroxy, sulfonic or phosphonic groups; n is 1-6 Y is halogen or alkyl sulfate containing 1 to 4 carbon atoms in the alkyl portion; and M is H, Li, Na, K or Mg said compound having a bath solubility of at least 0.1 mg/l.
Claim 4
Dependent Claim
19 words
The bath as defined in claim 1 in which said phthalocyanine radical as added to the bath is metal-free.
Claim 5
Dependent Claim
18 words
The bath as defined in claim 1 in which said phthalocyanine radical is a stable metal-containing phthalocyanine radical.
Claim 6
Dependent Claim
36 words
The bath as defined in claim 4 in which said metal-containing phthalocyanine radical contains a divalent or trivalent metal selected from the group consisting of cobalt, nickel, chromium, iron, and copper, as well as mixtures thereof.
Claim 7
Dependent Claim
15 words
The bath as defined in claim 4 in which said metal-containing phthalocyanine radical contains copper.
Claim 8
Dependent Claim
22 words
The bath as defined in claim 1 in which there is also present a bath soluble polyether compound as a supplemental brightener.
Claim 9
Dependent Claim
25 words
The bath as defined in claim 7 in which there is also present a bath soluble organic divalent sulfur compound as an additional supplemental brightener.
Claim 10
Dependent Claim
19 words
The bath as defined in claim 8 in which the organic divalent sulfur compound is an organic polysulfide compound.
Claim 11
Dependent Claim
24 words
The bath as defined in claim 1 in which there is also present a bath soluble organic divalent sulfur compound as a supplemental brightener.
Claim 12
Dependent Claim
19 words
The bath as defined in claim 10 in which the organic divalent sulfur compound is an organic polysulfide compound.
Claim 13
Independent Claim
38 words
A method for depositing a bright copper plating on a substrate which comprises the steps of electrodepositing copper from an aqueous acidic copper electroplating bath of a composition as defined in any one of claims 1 through 11.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |