Patent DE-102011014902-B3 (DE)
Title: Producing an antenna component with a three-dimensional antenna, comprises forming an electrical conductive layer made of an electrical conductive lacquer onto a thermoplastic carrier foil in an antenna area formed as antenna structure
Inventor: SCHINDLER ULRICH DR
IPC: B29C45/16
Filed: 2011-03-23
Granted: 2012-02-02
Abstract: The method for producing an antenna component (3) with a three-dimensional antenna, comprises forming a first electrical conductive layer (11) made of electrical conductive lacquer onto a thermoplastic carrier foil (10) in an antenna area formed as antenna structure, and introducing a covering layer on the first electrical conductive layer, so that the covering layer is introduced on the first electrical conductive layer in second partial areas of the antenna area arranged in a bending area (33) and in first partial areas of the antenna area but not on the first electrical conductive layer. The method for producing an antenna component (3) with a three-dimensional antenna, comprises forming a first electrical conductive layer (11) made of an electrical conductive lacquer onto a thermoplastic carrier foil (10) in an antenna area formed as antenna structure, introducing a covering layer on the first electrical conductive layer, so that the covering layer is introduced on the first electrical conductive layer in second partial areas of the antenna area arranged in a bending area (33) and is introduced in first partial areas of the antenna area but not on the first electrical conductive layer, galvanically depositing a second electrical conductive layer (13) made of a metallic material onto the areas of the first electrical conductive layer not covered by the covering layer, introducing a third electrical conductive layer made of an electrical conductive lacquer in the second partial areas of the antenna area, and thermoforming a foil element comprising the thermoplastic carrier foil, the first electrical conductive layer and the second electrical conductive layer by deep-drawing or back injection to form the antenna component, so that the thermoplastic carrier foil is bent in the bending areas. The third electrical conductive layer is introduced in the bending area, so that the third electrical conductive layer partially covers the first electrical conductive layer and/or the second electrical conductive layer. The third electrical conductive layer is introduced on the second electrical conductive layer in an area of the respective adjacent first partial area of the antenna area adjoining to the second partial areas of the antenna area. An overlapping area, in which the third electrical conductive layer overlaps the second electrical conductive layer, has a width of 0.05-10 mm. The first electrical conductive layer is introduced in the bending area in 0.001-99.5 mu m of larger layer thickness than in an adjoining area of the antenna area. The electrical conductive lacquer of the first and/or third electrical conductive layers is introduced in respective second partial area of the antenna area in a layer thickness of 0.5-100 mu m, and is printed by screen printing or gravure printing in a pattern-like manner. The electrical conductive lacquer comprises a conducting polymer and/or a polymer binder and electrically conducting particle, and possesses a weight percentage portion of thermoplastic polymer (more than 1%) and/or a glass transition temperature of 50-180[deg] C. The second electrical conductive layer is galvanized in a layer thickness of 0.5-250 mu m. The second partial area or one of the second partial areas extend itself over the entire width of the antenna area, is formed with a line width of 0.2-30 mm in a linear manner, and possesses a meander-like or wave-like shape, so that the adjoining areas of the second electrical conductive layer grip into each other in a finger-like manner. The longitudinal axis of the second partial area or one of the second partial areas is oriented transverse to the bending direction. The second partial area or one of the second partial areas comprises first zones and second zones, where the longitudinal axes of the first zones are oriented along the bending direction and the longitudinal axes of the second zones are oriented transverse to the bending direction. An independent claim is included for an antenna component with a three-dimensional antenna for cards or portable electrical device.