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公开(公告)号：DK151643C
公开(公告)日：1988-08-15
申请号：DK263878
申请日：1978-06-13
Applicant: IBM
Inventor： BARCLAY DONALD JOHN , MORGAN WILLIAM MORRIS
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公开(公告)号：AT33686T
公开(公告)日：1988-05-15
申请号：AT82111441
申请日：1982-12-10
Applicant: IBM
Inventor： BARCLAY DONALD JOHN
Abstract: A process for electroplating chromium comprising pre-treating the surface of a part to be plated with chromium by forming a deposit of a sulphur compound thereon, which sulphur compound accelerates the reduction of chromium ions to chromium metal. Preferably the deposit is formed cathodically in a solution containing a sulphur species. The sulphur species include thiocyanate, or species having S-O or S-S bonds: or a species having a -C=S or -C-S group within the molecule. Alternatively the sulphur compound can be chemically deposited by evaporating sulphur on to the surface or by immersing the part in a solution of sulphide ions.
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公开(公告)号：DE3269232D1
公开(公告)日：1986-03-27
申请号：DE3269232
申请日：1982-11-11
Applicant: IBM
Abstract: A chromium electroplating electrolyte comprising a source of trivalent chromium ions, a complexant, a buffer agent and a sulphur species selected from sulphites and dithionites, the complexant being selected so that the stability constant K1 of the chromium complex as defined herein is in the range 10 M preferably the chromium ions have a molar concentration lower than 0.01M. Complexants within this range include aspartic acid, iminodiacetic acid, nitrilotriacetic acid, 5-sulphosalicylic acid and citric acid.
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公开(公告)号：GB2109817B
公开(公告)日：1985-07-03
申请号：GB8134779
申请日：1981-11-18
Applicant: IBM
Abstract: A chromium electroplating electrolyte comprising a source of trivalent chromium ions, a complexant, a buffer agent and a sulphur species selected from sulphites and dithionites, the complexant being selected so that the stability constant K1 of the chromium complex as defined herein is in the range 10 M preferably the chromium ions have a molar concentration lower than 0.01M. Complexants within this range include aspartic acid, iminodiacetic acid, nitrilotriacetic acid, 5-sulphosalicylic acid and citric acid.
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5.发明专利
公开(公告)号：IN153802B
公开(公告)日：1984-08-18
申请号：IN699DE1979
申请日：1979-10-03
Applicant: IBM
Inventor： BARCLAY DONALD JOHN , VIGAR JAMES MICHAEL LINFORD
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Patent Agency Ranking
公开(公告)号：CH641213A5
公开(公告)日：1984-02-15
申请号：CH518878
申请日：1978-05-12
Applicant: IBM
Inventor： BARCLAY DONALD JOHN , MORGAN WILLIAM MORRIS
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公开(公告)号：ZA828368B
公开(公告)日：1983-09-28
申请号：ZA828368
申请日：1982-11-15
Applicant: IBM
Abstract: A chromium electroplating electrolyte containing trivalent chromium ions, a complexant, a buffer agent and thiocyanate ions for promoting chromium deposition, the thiocyanate having a molar concentration lower than that of the chromium ions. The chromium preferably has a concentration lower than 0.01M. Preferably the complexant is selected so that the stability constant K1 of chromium complex is in the range 10 M . Complexants in this range include aspartic acid, iminodiacetic acid, nitrilotriacetic acid and 5-sulphosalicylic acid.
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公开(公告)号：GB2115008A
公开(公告)日：1983-09-01
申请号：GB8302296
申请日：1983-01-27
Applicant: IBM
Inventor： BARCLAY DONALD JOHN
Abstract: A process for electroplating chromium comprising pre-treating the surface of a part to be plated with chromium by forming a deposit of a sulphur compound thereon, which sulphur compound accelerates the reduction of chromium ions to chromium metal. Preferably the deposit is formed cathodically in a solution containing a sulphur species. The sulphur species include thiocyanate, or species having S-O or S-S bonds: or a species having a -C=S or -C-S group within the molecule. Alternatively the sulphur compound can be chemically deposited by evaporating sulphur on to the surface or by immersing the part in a solution of sulphide ions.
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公开(公告)号：DE2965126D1
公开(公告)日：1983-05-11
申请号：DE2965126
申请日：1979-02-23
Applicant: IBM
Inventor： BARCLAY DONALD JOHN , BIRD COLIN LEONARD , MARTIN DAVID HUGH , MORGAN WILLIAM MORRIS
Abstract: An electrochromic display, preferably employing an organic electrochromic material such as heptyl viologen, has display electrodes with a rough surface in contact with the electrochromic material, and is operated at a current density such that the diffusion depth of the material conforms to the contours of the electrodes.
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