Abstract: An electroluminescent device (1) has a relief pattern (17) comprising overhanging sections (13) for patterning an electrode layer (11) of the device (1). In order to prevent the take up and transport of fluid, from which a functional layer (7, 9) is obtainable, along the capillary channels (23) formed by the overhanging sections (13), the relief pattern (17) comprises accompanying sections (15) which are positioned at distance of the overhanging sections (13) and between the sections (13) and the electroluminescent areas (21) comprising the functional layers (7, 9). A method of manufacturing the EL device (1) comprises depositing the functional layer or layers (7, 9) by means of a wet deposition method such as inkjet printing.

Abstract: An electroluminescent device (1) has a relief pattern (17) comprising overhanging sections (13) for patterning an electrode layer (11) of the device (1). In order to prevent the take up and transport of fluid, from which a functional layer (7, 9) is obtainable, along the capillary channels (23) formed by the overhanging sections (13), the relief pattern (17) comprises accompanying sections (15) which are positioned at distance of the overhanging sections (13) and between the sections (13) and the electroluminescent areas (21) comprising the functional layers (7, 9). A method of manufacturing the EL device (1) comprises depositing the functional layer or layers (7, 9) by means of a wet deposition method such as inkjet printing.

Abstract: A method is proposed for measuring water permeability of substrates (1). A reactive compound (Ca, Ba) which reacts with a diffusing material, e.g. water, is applied on the substrate and the change in time of transmissivity, reflectivity of the layer is monitored in time.

Abstract: An electroluminescent device (21) comprises a first (23) and a second (26) electrode layer, at least the second electrode layer (26) being provided in accordance with a desired pattern and one or more functional layers (24, 25R, 25G, 25B), the one or at least one of said functional layers being an electroluminescent layer. In order to pattern the second electrode layer (26) the EL device (21) comprises a relief pattern (27) having one or more overhanging sections (29). The EL device has means for hindering the transport of fluid along a capillary channel (33) formed by an overhanging section (29) and the surface (28a) supporting that section, an example of such means being protrusions (35) which block and/or reroute the capillary channel (33). Thus the transport of fluid by the channels (33) during manufacture of the EL device is hindered and color bleeding between pixels of the EL device and/or leakage current among electrodes of the first electrode layer is prevented.