Tablet, useful for pharmaceutical preparation, comprises a many individual powder particles, where a part of the tablet surface is a diffractive microstructure, which are impressed into the surface of the individual powder particles

• Main Authors: SOECHTIG, JUERGEN, STUCK, ALEXANDER, WALTER, HARALD, ZSCHOKKE, CHRISTIAN
• Format: Patent
• Language: English; German
• Published: 17.01.2008
• Subjects: BABY COMFORTERS; CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICALPURPOSES; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; DEVICES FOR RECEIVING SPITTLE; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGINGPHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL ORADMINISTERING FORMS; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; PERFORMING OPERATIONS; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; PRESSES; PRESSES IN GENERAL; TRANSPORTING

Tablet for pharmaceutical use comprises a many individual powder particles, where at least a part of the surface of tablet is a diffractive microstructure (11), which can be perceived in the visible spectral range and shows a visual safety feature, and the diffractive microstructure are impressed into the surface of the individual powder particles. Independent claims are included for: (1) a compression tool (1, 1a, 1b, 3) for producing the tablet comprising a pressing surface of the compression tool microstructure, where the microstructure have dimensions, which are smaller than the dimension of the individual crystallites of the material of the pressing surface; (2) compression press with at least the compression tool; and (3) preparation of microstructure on the surface of a tool, preferably compression tool comprising applying a photo resist layer on the surface; exposing the photo resist layer with a microstructure; developing the photo resist layer; transmitting the microstructure on the photo resist layer to the surface of the tool by dry etching and removing the photo resist layer. Ein Presswerkzeug (1, 1a, 1b, 3) für die Herstellung von Tabletten (4) durch Pressen eines Pulvergemisches (2), insbesondere ein Pressstempel, weist auf einer Pressoberfläche des Presswerkzeugs (1, 1a, 1b, 3) Mikrostrukturen (11) auf, wobei die genannten Mikrostrukturen (11) Dimensionen aufweisen, welche kleiner sind als die Dimensionen der einzelnen Kristallite (30) des Materials der Pressoberfläche des Presswerkzeugs (1, 1a, 1b, 3). Die Mikrostrukturen (11) der Presswerkzeuge können beispielsweise durch Ionenätzen oder durch Prägen hergestellt werden.