CLAIMS
1. An organic EL display device, comprising an insulating
layer formed on a first electrode of the organic EL display
device and constituted of a cured film obtained from a positive
type photosensitive resin composition containing (A) an
alkali-soluble resin, (B) an o-quinonediazide compound and (C)
an organic solvent,
wherein the mole ratio S/C of sulfur to carbon obtained when a section of the cured film is measured by means of an electron probe microanalyzer is greater than or equal to 0.003 and less than or equal to 0.008.
2. The organic EL display device according to claim 1, wherein the (A) alkali-soluble resin contained in the positive type photosensitive resin composition is constituted of at least one or more kind of alkali-soluble resin selected among a polyimide, a polyimide precursor and a polybenzoxazole precursor or an interpolymer thereof.
3. The organic EL display device according to claim 1 or 2, wherein the total amount of gas components derived from the organic solvent among components adsorbed and captured by a purge-and-trap method and detected by gas chromatography-mass spectrometry (GC-MS) in outgassed components emitted when a

cured film constituting the insulating layer is heated at 180°C for 30 minutes is less than or equal to 10 ppm in terms of n-hexadecane.
4. The organic EL display device according to any one of claims 1 to 3, wherein the 5% thermal weight reduction temperature of a cured film constituting the insulating layer is higher than or equal to 350°C.
5. The organic EL display device according to any one of claims 1 to 4, further comprising a flattening layer formed on a driving circuit of the organic EL display device and constituted of a cured .film obtained from a positive type photosensitive resin composition containing (A) an alkali-soluble resin, (B) an o-quinonediazide compound and (C) an organic solvent,
wherein the mole ratio S/C of sulfur to carbon obtained when a section of the cured film is measured by means of an electron probe microanalyzer is greater than or equal to 0.003 and less than or equal to 0.008.
6. The organic EL display device according to claim 5,
wherein the (A) alkali-soluble resin contained in the positive
type photosensitive resin composition is constituted of at
least one or more kind of alkali-soluble resin selected among

a polyimide, a polyimide precursor and a polybenzoxazole precursor or an interpolymer thereof.
7. The organic EL display device according to claim 5 or 6, wherein the total amount of gas components derived from the organic solvent among components adsorbed and captured by a purge-and-trap method and detected by gas chromatography-mass spectrometry (GC-MS) in outgassed components emitted when a cured film constituting the flattening layer is heated at 180°C for 30 minutes is less than or equal to 10 ppm in terms of n-hexadecane.
8. The organic EL display device according to any one of claims 5 to 7, wherein the 5% thermal weight reduction temperature of a cured film constituting the flattening layer is higher than or equal to 350°C.