Diode element and display apparatus using same as electron source

A display panel comprising:

• a flat first substrate which has provided on the inner surface a plurality of electron sources which are arranged in a matrix form;
• and
• a flat second substrate which has a plurality of phosphor which respectively correspond with the electron sources,
• wherein the electron sources are comprised of metal-insulating layer-metal which are formed by stacking in order a lower electrode which is formed on the first substrate, an insulating layer, and an upper electrode,
• wherein the insulating layer is composed of a non-crystalline oxidized layer which forms, using anodization, the lower electrode, and
• wherein the lower electrode is composed of a simple layer film of aluminum or aluminum alloy or a laminated layer film which has an outermost layer of aluminum or aluminum alloy and in the process of anodization, the aluminum or aluminum alloys in a display region are non-crystals.

A display panel comprising:

• a flat first substrate which has provided on the inner surface a plurality of electron sources which are arranged in a matrix form;
• and
• a flat second substrate which has a plurality of phosphor which respectively correspond with the electron sources,
• wherein the electron sources are comprised of metal-insulating layer-metal which are formed by stacking in order a lower electrode which is formed on the first substrate, an insulating layer, and an upper electrode,
• wherein the insulating layer is composed of a non-crystalline oxidized layer which forms, using anodization, the lower electrode, and
• wherein the lower electrode is composed of a simple layer film of aluminum or aluminum alloy or a laminated layer film which has an outermost layer of aluminum or aluminum alloy and in the anodization process, there are low oriented aluminum or aluminum alloy crystals with a ratio [(220) strength/(111) strength]] of peak strength of (220) diffraction lines and (110) peak strength of diffraction lines, given from wide-angle X-ray diffraction of the aluminum or aluminum alloy in a display region, is in the range of 0.2 to 0.6.

A display panel comprising:

• a flat first substrate which has provided on the inner surface a plurality of electron sources which are arranged in a matrix form;
• and
• a flat second substrate which has a plurality of phosphor which respectively correspond with the electron sources,
• wherein the electron sources are comprised of metal-insulating layer-metal which are formed by stacking in order a lower electrode which is formed on the first substrate, an insulating layer, and an upper electrode,
• wherein the insulating layer is composed of a non-crystalline oxidized layer which forms, using anodization, the lower electrode, and
• wherein the lower electrode is composed of a simple layer film of aluminum or aluminum alloy or a laminated layer film which has any one of these, and when actually used, the aluminum or aluminum alloy films in a display region are crystals whose half-width distribution of the X-ray diffraction rocking curve for superior oriented crystal surfaces, within the substrate is 10% or less.