GB1214425A - Aperture mask for colour t.v. picture tubes, and method for making the same - Google Patents

Aperture mask for colour t.v. picture tubes, and method for making the same

Info

Publication number
GB1214425A
GB1214425A GB08430/69A GB1843069A GB1214425A GB 1214425 A GB1214425 A GB 1214425A GB 08430/69 A GB08430/69 A GB 08430/69A GB 1843069 A GB1843069 A GB 1843069A GB 1214425 A GB1214425 A GB 1214425A
Authority
GB
United Kingdom
Prior art keywords
mask
apertures
masks
smaller
plated
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
GB08430/69A
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.)
Buckbee Mears Co
Original Assignee
Buckbee Mears Co
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 Buckbee Mears Co filed Critical Buckbee Mears Co
Publication of GB1214425A publication Critical patent/GB1214425A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/0777—Coatings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10S156/918—Delaminating processes adapted for specified product, e.g. delaminating medical specimen slide
    • Y10S156/919—Delaminating in preparation for post processing recycling step
    • Y10S156/922—Specified electronic component delaminating in preparation for recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

1,214,425. Colour television tubes. BUCKBEE-MEARS CO. 10 April, 1969 [6 Jan., 1969], No. 18430/69. Heading H1D. In making a colour television tube of the shadow mask type wherein the mask is used as a stencil when forming the fluorescent screen, the mask is provided with smaller apertures during these processes than when it is subsequently incorporated in the tube. The base mask 12 shown in Fig. 2 is made by a photographic method and is exposed on one side through a positive plate and on the other side through a negative plate, the latter process leaving a pattern of enamel dots on one side of the mask. This side is plated with a zinc layer 12a after which the mask is etched to form the apertures 13 and to remove the support for the enamel dots thereby forming the smaller apertures 14. After the formation of the fluorescent screen through the small apertures 14 the layer 12a is etched away leaving the large apertures 13 in the final shadow mask. In another method of manufacture, both sides of a metal sheet are photo-printed and the apertures 13 are etched out. Both sides are then plated to partially close the apertures 13, and after the screen processing the outer layers are removed by etching. In a further arrangement, Fig. 3 (not shown), two independent shadow masks with identical dot patterns but different-sized apertures are joined together during the screen processing, and the mask with the smaller apertures is removed before final assembly. The two masks may be made by a photographic process using the same master plate but different etching times. Alternatively the masks may be made by electroplating on a carrier member, the second mask being plated for a longer period so that the openings in it are smaller. The two masks must be domed or formed in the same die under identical conditions, and the mask with the smaller apertures may be used over and over again with a number of separate larger-aperture masks.
GB08430/69A 1969-01-06 1969-04-10 Aperture mask for colour t.v. picture tubes, and method for making the same Expired GB1214425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78926469A 1969-01-06 1969-01-06

Publications (1)

Publication Number Publication Date
GB1214425A true GB1214425A (en) 1970-12-02

Family

ID=25147102

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08430/69A Expired GB1214425A (en) 1969-01-06 1969-04-10 Aperture mask for colour t.v. picture tubes, and method for making the same

Country Status (5)

Country Link
US (2) US3574013A (en)
DE (1) DE1920735C3 (en)
FR (1) FR2027822A1 (en)
GB (1) GB1214425A (en)
NL (1) NL6916303A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075147A2 (en) * 1981-09-10 1983-03-30 Kabushiki Kaisha Toshiba Method for manufacturing mask for color CRT

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753663A (en) * 1969-08-15 1973-08-21 Zenith Radio Corp Blank for shadow mask for color television picture tube
US3770434A (en) * 1971-10-15 1973-11-06 Rca Corp Method for making an image screen structure for an apertured-mask cathode-ray tube using a mask having temporary apertures
US3738233A (en) * 1972-01-17 1973-06-12 Zenith Radio Corp Camera process for color tube screen printing
US3973965A (en) * 1972-05-30 1976-08-10 Tokyo Shibaura Electric Co., Ltd. Making shadow mask with slit-shaped apertures for CRT
US3922394A (en) * 1973-11-09 1975-11-25 Rca Corp Method for coating ferrous-metal mask for cathode-ray tube
US3922395A (en) * 1973-11-09 1975-11-25 Rca Corp Method for applying organic polymeric coating composition to ferrous-metal surfaces
US3962005A (en) * 1975-06-30 1976-06-08 Zenith Radio Corporation Method for etching shadow mask and regenerating etchant
US4106976A (en) * 1976-03-08 1978-08-15 International Business Machines Corporation Ink jet nozzle method of manufacture
US4353948A (en) * 1980-05-12 1982-10-12 Buckbee-Mears Company Hole technology
JPS57163955A (en) * 1981-02-25 1982-10-08 Toshiba Corp Mask focusing type color picture tube
JPS5840733A (en) * 1981-09-02 1983-03-09 Toshiba Corp Molding method of mask for color picture tube
JPS5844645A (en) * 1981-09-10 1983-03-15 Toshiba Corp Method of molding mask for color picture tube
US4632726A (en) * 1984-07-13 1986-12-30 Bmc Industries, Inc. Multi-graded aperture mask method
CA1237020A (en) * 1984-10-13 1988-05-24 Herbert A. Waggener Silicon nozzle structure and method of manufacture
US5863681A (en) * 1996-09-19 1999-01-26 Wickeder Westgalenstahl Gmbh Composite shadow mask
JPH10319870A (en) * 1997-05-15 1998-12-04 Nec Corp Shadow mask and production for color thin film el display device using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075147A2 (en) * 1981-09-10 1983-03-30 Kabushiki Kaisha Toshiba Method for manufacturing mask for color CRT
EP0075147A3 (en) * 1981-09-10 1984-01-04 Tokyo Shibaura Denki Kabushiki Kaisha Method for manufacturing mask for color crt

Also Published As

Publication number Publication date
US3574013A (en) 1971-04-06
NL6916303A (en) 1970-07-08
DE1920735A1 (en) 1970-09-17
DE1920735C3 (en) 1979-01-25
USB789264I5 (en)
FR2027822A1 (en) 1970-10-02
DE1920735B2 (en) 1978-05-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee