US3655549A - Fixtures for electrochemical processes - Google Patents

Fixtures for electrochemical processes Download PDF

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Publication number
US3655549A
US3655549A US43149A US3655549DA US3655549A US 3655549 A US3655549 A US 3655549A US 43149 A US43149 A US 43149A US 3655549D A US3655549D A US 3655549DA US 3655549 A US3655549 A US 3655549A
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US
United States
Prior art keywords
insulation
electrode
support bracket
work
plating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US43149A
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English (en)
Inventor
Robert G Wild
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COMMERCE UNION BANK AS TRUSTEE UNDER TRUST DATED DECEMBER 1 1985
Original Assignee
Individual
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Publication of US3655549A publication Critical patent/US3655549A/en
Assigned to INDUSTRIAL DEVELOPMENT BOARD OF THE METROPOLITAN GOVERNMENT OF NASHVILLE AND DAVIDSON COUNTY, A NON-PROFIT CORP OF TN. reassignment INDUSTRIAL DEVELOPMENT BOARD OF THE METROPOLITAN GOVERNMENT OF NASHVILLE AND DAVIDSON COUNTY, A NON-PROFIT CORP OF TN. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LADNEY, MICHAEL
Assigned to COMMERCE UNION BANK, AS TRUSTEE UNDER TRUST DATED DECEMBER 1, 1985 reassignment COMMERCE UNION BANK, AS TRUSTEE UNDER TRUST DATED DECEMBER 1, 1985 ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INDUSTRIAL DEVELOPMENT BOARD OF THE METROPOLITAN, GOVERNMENT OF NASHVILLE AND DAVIDSON COUNTY, A TN PUBLIC NON-PROFIT CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated

Definitions

  • ABSTRACT A rack for use in electroplating having current-carrying metal workpiece mounting brackets which are substantially covered with insulation but which have selected areas not covered with insulation so as to expose the bare metal of the brackets to the surrounding plating solution or air in order to provide efficient transfer of heat from the bracket to the surrounding medium.
  • This invention relates to improvements in electrochemical process fixtures and more specifically to fixtures which are used for holding workpieces in an electrochemical process such as electroplating.
  • the electroplating process is a particular type of electrochemical process in which electric current is passed between two electrodes which are either totally or partially submerged in an electrolyte solution.
  • the two electrodes are an anode and a cathode, respectively, and the electrolyte solution is a plating solution.
  • the electrolyte solution is a plating solution.
  • metal ions are removed from the solution and deposited as molecules on the cathode.
  • FIG. 1 shows an electroplating tank with a plating rack therein embodying the present invention.
  • FIG. 2 is a sectional view taken along the line IIII in FIG. 1.
  • FIG. 3 is an enlarged fragmentary sectional view taken along the line IIIIII in FIG. 2.
  • FIG. 4 is a fragmentary sectional view taken along the line IVIV in FIG. 1.
  • an electroplating tank 10 is shown containing a plating solution 12.
  • Partially submerged into solution 12 are an anode l4 and a plating rack 16.
  • Anode 14 includes a bar 17 and a support hook 18 by means of which the anode is suspended from a rod or bus bar 20 connected to a source of electric current.
  • Rack 16 includes a frame 22 provided with a pair of support hooks 24 by means of which the rack is suspended from a rod or bus bar 25.
  • a first work-support bracket 26 and a second work-support bracket 28 are mounted on frame 22.
  • Bracket 26 is a non-flexible rod rigidly mounted on frame 22.
  • Bracket 28 is preferably a spring mounted on frame 22 by means of nut 30 and bolt 32, as is clearly shown in FIG. 3.
  • a workpiece 34 is detachably mounted on rack 16 by means of brackets 26 and 28.
  • frame 22 is completely covered with suitable insulation material, as is work-support bracket 26.
  • Work-support bracket 28 is selectively insulated, as will be discussed hereinafter.
  • work-support bracket 28 is formed of base metal 36 (preferably a stainless steel spring strip) covered selectively by insulating material 38.
  • base metal 36 preferably a stainless steel spring strip
  • insulating material 38 In actual practice, either the bracket may be completely covered with insulating material and then insulation may be selectively removed, or the selected portions of the bracket may be masked off before the insulation is applied.
  • plating current is conducted from rod 25 through hooks 24 down through frame 22 to work-support bracket 28.
  • the current in said work-support bracket passes through the base metal 36 to the work 34 and then continues through solution 12 to anode l4 and rod 20.
  • the plating current causes metal from the plating solution to be deposited on the work 34, thereby plating the work.
  • Insulation is removed or omitted from work-support bracket 28 at small selected areas designated 40, 42, 44 and 46. This permits the heat generated by the plating current passing through the work-support bracket to be removed from the bracket at the exposed portions thereof, either by conduction or convection. This prevents the overheating of the worksupport bracket and the resulting deterioration of the insulation thereon. For example, at locations 40 and 42, heat from the bracket will be transferred to the air; while at locations 44 and 46, heat will be given up to the electrolyte solution. It is not necessary that the insulation be removed so as to provide some heat transfer to the air and some to the solution. Insulation may be removed or omitted from selected areas of bracket 28 so as to transfer heat to only the air or only the solution or to both.
  • Insulation is preferably removed or omitted from the work-support bracket at locations which are further distant from anode 14 than is the work 34, and these locations are preferably so disposed as to face away from anode 14.
  • the bare areas 40, 42, 44 and 46 are on the shaded side of bracket 28 relative to anode 14. In this way, the plating of these exposed areas is reduced to a very minimum.
  • the selective removal or omission of insulation from the work-support bracket does not result in the reoccurrence of the condition which occasioned the need for insulation; namely, to prevent inefficient plating. It also prevents the need for oversizing of the completely insulated work-support bracket required for a given plating job because heating losses in the bracket, by virtue of the new invention, can be more readily carried away.
  • This is of particular advantage in the case of plating light flimsy workpieces which require the utilization of mounting brackets in the form. of light springs in order to prevent distortion of the workpieces by the tension of the mounting bracket.
  • support bracket 26 is intended to be a rigid, nonflexible member while support bracket 28 is intended to be of flexible material having spring-type characteristics.
  • spring-type and rigid members may be used for supporting a workpiece of given configuration and that either rigid or flexible work-support pieces may have insulation selectively removed or omitted therefrom.
  • work-support brackets could readily be designed integrally with a frame, and therefore the frame itself might have portions of its insulation selectively removed therefrom.
  • bracket comprises a generally flat spring metal strip having lengthwise opposite ends corresponding to said first and second portions a generally flat portion between the two ends adapted to be submerged when the tank is filled with solution to the desired level and having a generally flat surface facing toward said electrode and a generally flat surface facing in the opposite direction from said electrode, said insulation covering the entire flat surface facing said electrode but selectively covering the other flat surface thereof so as to leave at least one uncovered area thereon exposed to the surrounding medium to facilitate heat transfer from the strip to the medium.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
US43149A 1970-06-03 1970-06-03 Fixtures for electrochemical processes Expired - Lifetime US3655549A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4314970A 1970-06-03 1970-06-03

Publications (1)

Publication Number Publication Date
US3655549A true US3655549A (en) 1972-04-11

Family

ID=21925743

Family Applications (1)

Application Number Title Priority Date Filing Date
US43149A Expired - Lifetime US3655549A (en) 1970-06-03 1970-06-03 Fixtures for electrochemical processes

Country Status (7)

Country Link
US (1) US3655549A (pt)
JP (1) JPS5040107B1 (pt)
BR (1) BR7103238D0 (pt)
CA (1) CA951273A (pt)
DE (1) DE2125420C3 (pt)
FR (1) FR2094009B1 (pt)
GB (1) GB1345446A (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297197A (en) * 1980-11-13 1981-10-27 International Telephone And Telegraph Corp. Electroplating rack
US6454926B1 (en) * 1997-09-30 2002-09-24 Semitool Inc. Semiconductor plating system workpiece support having workpiece-engaging electrode with submerged conductive current transfer areas
US20020194716A1 (en) * 1996-07-15 2002-12-26 Berner Robert W. Modular semiconductor workpiece processing tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1010647A (en) * 1909-06-26 1911-12-05 Spirella Co Electroplating-rack.
GB350072A (en) * 1930-03-18 1931-06-11 Birmingham Small Arms Co Ltd Improvements in or relating to electrolytic processes
US2115616A (en) * 1933-08-07 1938-04-26 Packard Motor Car Co Method of and apparatus for plating
US2999802A (en) * 1958-11-03 1961-09-12 William L Bonnell Company Inc Anodizing racks
US3042604A (en) * 1960-03-29 1962-07-03 Aluminium Ind Ag Furnaces for electrolytic production of aluminum

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1010647A (en) * 1909-06-26 1911-12-05 Spirella Co Electroplating-rack.
GB350072A (en) * 1930-03-18 1931-06-11 Birmingham Small Arms Co Ltd Improvements in or relating to electrolytic processes
US2115616A (en) * 1933-08-07 1938-04-26 Packard Motor Car Co Method of and apparatus for plating
US2999802A (en) * 1958-11-03 1961-09-12 William L Bonnell Company Inc Anodizing racks
US3042604A (en) * 1960-03-29 1962-07-03 Aluminium Ind Ag Furnaces for electrolytic production of aluminum

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297197A (en) * 1980-11-13 1981-10-27 International Telephone And Telegraph Corp. Electroplating rack
US20020194716A1 (en) * 1996-07-15 2002-12-26 Berner Robert W. Modular semiconductor workpiece processing tool
US7074246B2 (en) 1996-07-15 2006-07-11 Semitool, Inc. Modular semiconductor workpiece processing tool
US6454926B1 (en) * 1997-09-30 2002-09-24 Semitool Inc. Semiconductor plating system workpiece support having workpiece-engaging electrode with submerged conductive current transfer areas
US20030029732A1 (en) * 1997-09-30 2003-02-13 Ritzdorf Thomas L. Semiconductor plating system workpiece support having workpiece-engaging electrode with submerged conductive current transfer areas

Also Published As

Publication number Publication date
GB1345446A (en) 1974-01-30
FR2094009B1 (pt) 1974-03-22
JPS5040107B1 (pt) 1975-12-22
DE2125420B2 (de) 1975-01-16
FR2094009A1 (pt) 1972-02-04
CA951273A (en) 1974-07-16
DE2125420C3 (de) 1975-08-28
DE2125420A1 (de) 1971-12-09
BR7103238D0 (pt) 1973-03-29

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Date Code Title Description
AS Assignment

Owner name: COMMERCE UNION BANK, AS TRUSTEE UNDER TRUST DATED

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INDUSTRIAL DEVELOPMENT BOARD OF THE METROPOLITAN, GOVERNMENT OF NASHVILLE AND DAVIDSON COUNTY, A TN PUBLIC NON-PROFIT CORP.;REEL/FRAME:004512/0208

Effective date: 19851226

Owner name: INDUSTRIAL DEVELOPMENT BOARD OF THE METROPOLITAN G

Free format text: SECURITY INTEREST;ASSIGNOR:LADNEY, MICHAEL;REEL/FRAME:004495/0159

Effective date: 19851217