Patent ID: 6316869
Filing Date: 2001-11-13
Classification: H01J

Abstract:
A shadow mask for a color cathode ray tube, the shadow mask being a color selecting electrode, the shadow mask comprising:a ratio a.sub.R of a diffraction intensity R{100} of {100} crystal planes to a diffraction intensity R{110} of {110} crystal planes being greater than unity; anda ratio g.sub.R of a sum of a diffraction intensity R{100} of {100} crystal planes and a diffraction intensity R{111} of {111} crystal planes to a diffraction intensity R{110} of {110} crystal planes being in a range 2.about.20,wherein the a.sub.R being greater than unity and g.sub.R being in a range 2.about.20 are obtained from the R{111}, R{200}, R{220} and R{311}, which are diffraction intensities of each of the crystal planes in the vertical direction to the surface of the thin plate, calculated from the following equation according to inverse pole figure analyses and orientation distribution function calculation of crystal planes {111}, {200}, {220} and {311},R.sub.(hkl) =(1/2.pi.).intg.f(g)d.psi.where .psi. is a projected area of a crystal plane {hkl} on a particular test sample direction in an orientation space.