GB784761A - Method of and apparatus for producing coils photographically - Google Patents

Method of and apparatus for producing coils photographically

Info

Publication number
GB784761A
GB784761A GB23208/55A GB2320855A GB784761A GB 784761 A GB784761 A GB 784761A GB 23208/55 A GB23208/55 A GB 23208/55A GB 2320855 A GB2320855 A GB 2320855A GB 784761 A GB784761 A GB 784761A
Authority
GB
United Kingdom
Prior art keywords
silver
layer
mask
cylinder
rollers
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
Application number
GB23208/55A
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.)
Aladdin Industries LLC
Original Assignee
Aladdin Industries LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aladdin Industries LLC filed Critical Aladdin Industries LLC
Publication of GB784761A publication Critical patent/GB784761A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0284—Details of three-dimensional rigid printed circuit boards
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09009—Substrate related
    • H05K2201/09018—Rigid curved substrate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
    • H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
    • H05K3/061—Etching masks
    • H05K3/064—Photoresists

Abstract

784,761. Photographic production of inductance coils; contact printing apparatus. ALADDIN INDUSTRIES, Inc. Aug. 11, 1955 [Aug. 18, 1954], No. 23208/55. Class 98(2) Inductance coils are produced by exposing a cylindrical insulating former coated with at least one conductive layer and a photo-resist composition, through a mask of skewed strips constituting developed convolutions of the ultimate coil winding, dissolving away the unexposed portions and etching the conductive layer. In an example a cylindrical tube or rod of insulating material such as glass or synthetic resin is silvered, preferably by immersion in stannous chloride and hydrochloric acid, washing and immersion in ammoniacal silver and formaldehyde. The silver layer is then coated with copper as by electroplating and then another thin layer of silver is applied as by flash coating in a bath of silver and potassium cyanides. This second silver coating acts as a reflecting layer and reduces the exposure time of the lightsensitive layer which is next applied and may be any photo-engraving enamel such as bichromated colloid. The sensitive layer is then exposed through the mask and the unexposed portions removed in the usual manner. The silver layer so exposed and the underlying copper are etched away with ferric chloride and the bottom layer of silver is then removed with a solution of potassium ferricyanide and sodium thiosulphate. The resist may then be removed to leave helical turns of metal on the insulating cylinder, and the product may be coated all over with a styrene resin. The mask is formed by photographing a frame carrying skew bars set up in the form of the pattern required. This mask may then be wrapped round the sensitized cylinder and exposed from all directions. Alternatively the mask may be part of a band which is moved over and in contact with the surface of the cylinder as it rotates past a light source, and an apparatus for performing this operation is shown in Fig. 6. The transparency 28 is wound between rollers 47, 48 across the light sensitive cylindrical blank 18 which is supported on idle rollers 56. Rollers 47, 48, 56 are driven from a motor 74 by worm 75 and belt 76. Exposure is by a lamp 80, and pressure rollers 58 are provided on top of the cylinder 18.
GB23208/55A 1954-08-18 1955-08-11 Method of and apparatus for producing coils photographically Expired GB784761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US784761XA 1954-08-18 1954-08-18

Publications (1)

Publication Number Publication Date
GB784761A true GB784761A (en) 1957-10-16

Family

ID=22144259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23208/55A Expired GB784761A (en) 1954-08-18 1955-08-11 Method of and apparatus for producing coils photographically

Country Status (1)

Country Link
GB (1) GB784761A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686230A (en) * 1994-04-15 1997-11-11 U.S. Philips Corporation Method of manufacturing a device, by which method various parts of a body are brought into a pattern
WO2013045720A1 (en) * 2011-09-26 2013-04-04 Abengoa Solar New Technologies, S.A. Working method for a system for partial mirroring of glass tubes, and said system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686230A (en) * 1994-04-15 1997-11-11 U.S. Philips Corporation Method of manufacturing a device, by which method various parts of a body are brought into a pattern
WO2013045720A1 (en) * 2011-09-26 2013-04-04 Abengoa Solar New Technologies, S.A. Working method for a system for partial mirroring of glass tubes, and said system

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