WO2003049137A3 - Tie bars only on the grade side of aperture masks - Google Patents

Tie bars only on the grade side of aperture masks Download PDF

Info

Publication number
WO2003049137A3
WO2003049137A3 PCT/US2002/038323 US0238323W WO03049137A3 WO 2003049137 A3 WO2003049137 A3 WO 2003049137A3 US 0238323 W US0238323 W US 0238323W WO 03049137 A3 WO03049137 A3 WO 03049137A3
Authority
WO
WIPO (PCT)
Prior art keywords
tie bars
mask
extend
grade
grade side
Prior art date
Application number
PCT/US2002/038323
Other languages
French (fr)
Other versions
WO2003049137A2 (en
Inventor
Thomas R Sage
Lance M Benjamin
Jeffrey Z Wang
Leo B Kriksunov
Original Assignee
Bmc Ind Inc
Thomas R Sage
Lance M Benjamin
Jeffrey Z Wang
Leo B Kriksunov
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 Bmc Ind Inc, Thomas R Sage, Lance M Benjamin, Jeffrey Z Wang, Leo B Kriksunov filed Critical Bmc Ind Inc
Priority to AU2002359547A priority Critical patent/AU2002359547A1/en
Publication of WO2003049137A2 publication Critical patent/WO2003049137A2/en
Publication of WO2003049137A3 publication Critical patent/WO2003049137A3/en

Links

Classifications

    • 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
    • H01J29/076—Shadow masks for colour television tubes characterised by the shape or distribution of beam-passing apertures
    • 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
    • H01J2229/075—Beam passing apertures, e.g. geometrical arrangements

Landscapes

  • Electron Beam Exposure (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

A mask useable to direct an electron beam having a cone side and a grade side. The cone side includes a plurality of troughs that extend partially into the mask but do not extend to the grade side. Apertures are formed in the bottoms of the troughs that extend through to the grade side. The apertures are separated by both actual and virtual tie bars. In a preferred embodiment, some of the virtual tie bars extend from the grade side, through the trough to the cone side. The occurrence of these cone side virtual tie bars varies in concentration across the extent of the mask such that the concentration is heavy in areas where clipping is desired, and light in areas where clipping is not desired. In another preferred embodiment, the size, shape and location of the cone side virtual tie bars vary across the extent of the mask to accommodate for the angle of the electron beam travel and the necessity for localized clipping.
PCT/US2002/038323 2001-11-30 2002-12-02 Tie bars only on the grade side of aperture masks WO2003049137A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002359547A AU2002359547A1 (en) 2001-11-30 2002-12-02 Tie bars only on the grade side of aperture masks

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US34421201P 2001-11-30 2001-11-30
US60/344,212 2001-11-30
US41125802P 2002-09-16 2002-09-16
US60/411,258 2002-09-16

Publications (2)

Publication Number Publication Date
WO2003049137A2 WO2003049137A2 (en) 2003-06-12
WO2003049137A3 true WO2003049137A3 (en) 2004-02-26

Family

ID=26993805

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/038323 WO2003049137A2 (en) 2001-11-30 2002-12-02 Tie bars only on the grade side of aperture masks

Country Status (2)

Country Link
AU (1) AU2002359547A1 (en)
WO (1) WO2003049137A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883770A (en) * 1972-01-19 1975-05-13 Hitachi Ltd Colour picture tubes
US4300069A (en) * 1979-12-18 1981-11-10 Rca Corporation Color picture tube having improved slit type shadow mask and method of making same
US5079477A (en) * 1988-02-02 1992-01-07 Dainippon Screen Mfg. Co., Ltd. Slot type shadow mask
FR2795863A1 (en) * 1999-06-30 2001-01-05 Samsung Sdi Co Ltd TIGHT PERFORATED MASK FOR A CATHODE RAY TUBE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883770A (en) * 1972-01-19 1975-05-13 Hitachi Ltd Colour picture tubes
US4300069A (en) * 1979-12-18 1981-11-10 Rca Corporation Color picture tube having improved slit type shadow mask and method of making same
US5079477A (en) * 1988-02-02 1992-01-07 Dainippon Screen Mfg. Co., Ltd. Slot type shadow mask
FR2795863A1 (en) * 1999-06-30 2001-01-05 Samsung Sdi Co Ltd TIGHT PERFORATED MASK FOR A CATHODE RAY TUBE

Also Published As

Publication number Publication date
WO2003049137A2 (en) 2003-06-12
AU2002359547A8 (en) 2003-06-17
AU2002359547A1 (en) 2003-06-17

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