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    ELECTRODEPOSITION OF CHROMIUM
    61.
    发明专利
    ELECTRODEPOSITION OF CHROMIUM 未知

    公开(公告)号：GB2109816B

    公开(公告)日：1985-01-23

    申请号：GB8134778

    申请日：1981-11-18

    Applicant: IBM

    Inventor： BARCLAY DONALD JOHN ,  VIGAR JAMES MICHAEL LINFORD ,  MORGAN WILLIAM MORRIS

    IPC: C25D3/06 ,  C25D3/10 ,  C25D3/56

    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.

    COUNTER ELECTRODE ARRANGEMENT OF AN ELECTROCHROMIC DISPLAY DEVICE
    64.
    发明专利
    COUNTER ELECTRODE ARRANGEMENT OF AN ELECTROCHROMIC DISPLAY DEVICE 未知

    公开(公告)号：DE2966374D1

    公开(公告)日：1983-12-08

    申请号：DE2966374

    申请日：1979-10-31

    Applicant: IBM

    Inventor： BARCLAY DONALD JOHN ,  LOWE ANTHONY CYRIL ,  MARTIN DAVID HUGH

    IPC: G09F9/30 ,  G02F1/155 ,  G02F1/163 ,  G09G3/19 ,  G02F1/17

    Abstract: An electrochromic display device comprises a single counter electrode and a plurality of display electrodes. The counter electrode is charged and is maintained at a given potential by a donor electrode which transfers charge to the counter electrode in response to the action of a reference electrode. A potentiostat operates to supply current to the donor electrode in accordance with the potential of the counter electrode as sensed by the reference electrode. Both the donor electrode and the counter electrode are preferably of platinum black. The donor electrode is preferably arranged in the manner of a frame about the display area. The counter electrode is preferably grid-shaped.

    ELECTRODEPOSITION OF CHROMIUM
    69.
    发明专利
    ELECTRODEPOSITION OF CHROMIUM 未知

    公开(公告)号：GB2109817A

    公开(公告)日：1983-06-08

    申请号：GB8134779

    申请日：1981-11-18

    Applicant: IBM

    Inventor： BARCLAY DONALD JOHN ,  VIGAR JAMES MICHAEL LINFORD ,  MORGAN WILLIAM MORRIS

    IPC: C25D3/06 ,  C25D3/10 ,  C25D3/56

    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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