Abstract: A method includes receiving a substrate having a front side and a back side, forming a shallow trench in the substrate from the front side, forming a liner layer including a first dielectric material in the shallow trench, depositing a second dielectric material different from the first dielectric material on the liner layer to form an isolation feature in the shallow trench, forming an active region surrounded by the isolation feature, forming a gate stack on the active region, forming a source/drain (S/D) feature on the active region and on a side of the gate stack, thinning down the substrate from the back side such that the isolation feature is exposed, etching the active region to expose the S/D feature from the back side to form a backside trench, and forming a backside via feature landing on the S/D feature and surrounded by the liner layer.

Abstract: An organic compound is described. An organic electroluminescence device comprises the organic compound, as a host of an emissive layer, or as a hole blocking layer. The organic compound may increase a half-life or current efficiency of the organic electroluminescence device. The organic compound may lower a driving voltage of the organic electroluminescence device. The mentioned organic compound may have the following formula: The same definition as described in the present invention.

Abstract: An organic compound of formula (1) useful as a material of an organic electroluminescence device is disclosed. The same definition as described in the present invention.

Abstract: An organic compound is described. An organic electroluminescence device comprises the organic compound as a host or an electron transfer layer. The organic compound of the following formula may lower a driving voltage or increase a current efficiency or a half-life of the organic electroluminescence device. The same definition as described in the present invention.

Abstract: An organic compound of formula (1) useful as a material of an organic electroluminescence device is disclosed. The same definition as described in the present invention.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device using the organic compound as a host material, a fluorescent guest material, an electron transporting or a hole blocking material in the light emitting layer of the organic electroluminescence device. The organic compound may be for lowering a driving voltage, power consumption or increasing a current efficiency or half-life of the organic electroluminescence device. The same definition as described in the present invention.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device using the organic compound as an emitting host material, an electron transfer material or a hole blocking material in the light emitting layer of the organic electroluminescence device. The organic compound may be for increasing a half-life or current efficiency of the organic electroluminescence device, and may be for lowering a driving voltage or power consumption of the organic electroluminescence device. The same definition as described in the present invention.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device employing the organic compound as the fluorescent host or guest material in the light emitting layer of the organic electroluminescence device. The organic electroluminescence device employing the organic compound of the present invention can operate under reduced driving voltage, increased current efficiency, or prolong half-life time.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device employing the organic compound as the fluorescent host material in the light emitting layer of the organic electroluminescence device. The organic electroluminescence device employing the organic compound of the present invention can operate under reduced driving voltage, increase current efficiency, and prolong half-life time.

Abstract: A heteroaromatic compound which can be used as the fluorescent guest material in the light emitting layer of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the heteroaromatic compound of the present invention shows lower power consumption, higher efficiency, and longer half-life time than the existed organic electroluminescence devices.

Abstract: An organic compound is described. An organic electroluminescence device comprises the organic compound, as a host of an emissive layer, or as a hole blocking layer. The organic compound may increase a half-life or current efficiency of the organic electroluminescence device. The organic compound may lower a driving voltage of the organic electroluminescence device. The mentioned organic compound may have the following formula: The same definition as described in the present invention.

Abstract: A heteroaromatic compound which can be used as the fluorescent guest material in the light emitting layer of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the heteroaromatic compound of the present invention can operate under reduced driving voltage, increase current efficiency, and prolong half-life time.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device employing the organic compound as the fluorescent host or guest material in the light emitting layer of the organic electroluminescence device. The organic electroluminescence device employing the organic compound of the present invention can operate under reduced driving voltage, increased current efficiency, or prolong half-life time.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device using the organic compound as a host material, a fluorescent guest material, an electron transporting or a hole blocking material in the light emitting layer of the organic electroluminescence device. The organic compound may be for lowering a driving voltage, power consumption or increasing a current efficiency or half-life of the organic electroluminescence device. The same definition as described in the present invention.

Abstract: The present invention discloses a 5,12-dihydrotetracene derivative and an organic electroluminescence device employing the 5,12-dihydrotetracene derivative as the thermally activated delayed fluorescence host material or the thermally activated delayed fluorescence dopant material in the light emitting layer. The organic electroluminescence device of the present invention exhibits improved performance, such as reduced power consumption and increased current efficiency.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device using the organic compound as an emitting host material, an electron transfer material or a hole blocking material in the light emitting layer of the organic electroluminescence device. The organic compound may be for increasing a half-life or current efficiency of the organic electroluminescence device, and may be for lowering a driving voltage or power consumption of the organic electroluminescence device. The same definition as described in the present invention.

Abstract: The present invention discloses a novel polyheteroaromatic compound derived from 7?,7?-dimethyl-5?,7?-dihydrospiro[cyclopenta[1,2-b:5,4-b?-dithiophene-4,13?-indeno[1,2-b]acridine] core structures. The polyheteroaromatic compound can be used as organic electroluminescence materials for use in an organic electroluminescence device and electronic equipment.

Abstract: The present invention discloses an organic compound and an organic electroluminescence device employing the organic compound as the fluorescent host material in the light emitting layer of the organic electroluminescence device. The organic electroluminescence device employing the organic compound of the present invention can operate under reduced driving voltage, increase current efficiency, and prolong half-life time.

Abstract: An organic compound which can be used as the phosphorescent host material, the fluorescent host material, or the fluorescent dopant material of the light emitting layer, and/or the electron transporting material of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the organic compound can lower driving voltage, prolong half-lifetime, and increase luminance and current efficiency.

Abstract: A heteroaromatic compound which can be used as the fluorescent guest material in the light emitting layer of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the heteroaromatic compound of the present invention shows lower power consumption, higher efficiency, and longer half-life time than the existed organic electroluminescence devices.