Electron emission device with black layer and method of preparing the same

An electron emission device comprising:

• a first substrate comprising an electron emission region;
• a second substrate comprising a light emitting region;
• a phosphor layer formed on the light emitting region of the second substrate with a pattern;
• and
• a black layer formed at a non-light-emitting region between the pattern of the phosphor layer, the black layer comprising:
• a first region of chromium oxide or an oxide of chromium and one or more metals selected from the group consisting of indium, tin, indium-tin, copper, antimony, titanium, manganese, cobalt, nickel, zinc, lead, and combinations thereof, the first region formed on an anode;
• a second region of metallic chromium formed on the first region;
• and
• a third region of chromium oxide formed on the second region,
• wherein the first region of the black layer further comprises iron, molybdenum, or tungsten.

An electron emission device comprising:

• a first substrate comprising an electron emission region;
• a second substrate,
• an anode formed on the second substrate,
• a phosphor layer formed on the anode with a pattern;
• and
• a black layer formed with a pattern between the pattern of the phosphor layer, the black layer comprising:
• a first region of chromium oxide or an oxide of chromium and one or more metals selected from the group consisting of indium, tin, indium-tin, copper, antimony, titanium, manganese, cobalt, nickel, zinc, lead, and combinations thereof, the first region formed on the anode;
• a second region of metallic chromium formed on the first region;
• and
• a third region of chromium oxide formed on the second region,
• wherein the black layer has a thickness of at least 2500 Å.

An electron emission device comprising:

• a first substrate comprising an electron emission region;
• a second substrate,
• an anode formed on the second substrate,
• a phosphor layer formed on the anode with a pattern;
• and
• a black layer formed with a pattern between the pattern of the phosphor layer, the black layer comprising:
• a first region of chromium oxide or an oxide of chromium and one or more metals selected from the group consisting of indium, tin, indium-tin, copper, antimony, titanium, manganese, cobalt, nickel, zinc, lead, and combinations thereof, the first region formed on the anode;
• a second region of metallic chromium formed on the first region;
• and
• a third region of chromium oxide formed on the second region,
• wherein the first region of the black layer further comprises iron, molybdenum, or tungsten.