Abstract:
PROBLEM TO BE SOLVED: To provide a monolithic ceramic element including a sheet laminate which is minimized of shrinkage in the lateral direction in-plane of a layer and also is easy to fabricate than a publicly known method.SOLUTION: A sheet laminate of the present invention includes a green sheet against a function layer consisting of functional ceramic, a green sheet against a tension layer made of a dielectric material which is of a multilayer structure and directly adjoins the function layer, and metallization surfaces. The function layer is disposed between the metallization surfaces. The green sheet against the tension layer has a phase transition temperature of less than the firing temperature of the functional ceramic, so that it transitions to a recrystallization phase at the phase transition temperature. This phase remains intact in a solid state until the firing temperature of the functional ceramic is exceeded. The tension layer contains any ceramic phase which does not in effect react with the functional ceramic or does not diffuse at the firing temperature of the function layer.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus in which vibrations of the piezoelectric element remain extensively unaffected. SOLUTION: The apparatus is disclosed for the suspension and contacting of the piezoelectric component 1 which has multiple electrode layers. The apparatus has a substrate 2 on which electrical conductor tracks 3 are arranged. The piezoelectric component 1 is suspended above the substrate 2 and electrically contacted at a minimum of two of its edge areas, in which the component has vibration nodes 4a and 4b. The piezoelectric component 1 is spaced apart from the substrate 2 and the vibrations of the piezoelectric component 1 remain extensively unaffected by the suspension. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
Disclosed is a ceramic mixed system comprising a two-phase mixture of pure components A and B, phase A being based on the cubic to tetragonal modification of Bi 3 NbO 7 and phase B being based on the monoclinic pyrochlore modification of Bi 2 (Zn 2 / 3 Nb 4 / 3 )O 7 . The electrical properties of ceramic bodies that are made therefrom make the material suitable for components which have a multilayer structure, into which capacitors and inductors are integrated, and which can be used for processing data and signals.
Abstract:
The invention relates to an electric component comprising a carrier (1) and a chip (5) which is fixed on the carrier while being conductively connected to the carrier (1). The component comprises a shielding cover (2) the lower side of which is connected in a peripheral region to an earthing contact (32) of the carrier (1). The chip (5) is disposed in a cavity (21) between the carrier (1) and the shielding cover (2) and comprises contacts which are each connected to a signal line (78, 79) disposed in the carrier (1). The respective signal line (78, 79) forms a coaxial bushing filter (11) with the conducticve surfaces (3) which are arranged in the carrier (1) and connected to the ground. The respective coaxial bushing filter (11) protrudes beyond the base surface of the shielding cover (2) in a projection plane in at least one direction.
Abstract:
The invention relates to a method for producing a ceramic substrate, comprising the following steps: (a) preparing a base (2) with a stack (2a) of superimposed layers (3), which contain an unsintered ceramic material and a sintering agent, whereby one of said layers (3a) contains an increased proportion of sintering agent compared to an adjacent layer (3) and b) sintering the layer stack (2a). The present invention also relates to a ceramic substrate. The increased proportion of sintering agent permits the mechanical bond between a layer (3a) and the adjacent layer (3) to be improved.
Abstract:
The invention relates to a method for producing a ceramic substrate (1), comprising the following steps: a) a base body (2) is prepared, said base body comprising a stack (2a) of superimposed layers (3) containing an unsintered ceramic material, b) a constraining layer (4) is formed by pressing a powder (5) onto the surface (6) of the uppermost layer (7) of the stack (2a), c) the stack (2a) is sintered, and d) the constraining layer (4) is removed.
Abstract:
This invention relates to a ceramic multi-layered capacitor (1) which comprises a base body (2), which has ceramic layers (3), which are arranged to form a stack in a layer stacking direction (S), and first and second electrode layers (41, 42), which are arranged between the ceramic layers (3). The multi-layered capacitor (1) further comprises a first external contact (51), which is arranged on a first lateral face (61) of the base body (2) and is connected in an electrically conductive manner to the first electrode layers (41), and a second external contact (52), which is arranged on a second lateral face (62), opposite the first lateral face (61), of the base body (2) and is connected in an electrically conductive manner to the second electrode layers (42). The base body (2) has a width B along the layer stacking direction (S), a height H perpendicular to the first lateral face (61) and a length L perpendicular to the height H and perpendicular to the layer stacking direction (S), wherein the relationship B/H >= 0.2 applies for the ratio of width B to height H.
Abstract:
Disclosed is a module for electrical components. In said module, a component chip is glued to the top of a multilayer substrate which comprises integrated wiring and on which bondable terminal faces are provided. The component chip is fitted with bond pads on the upward-facing surface thereof and is connected to the substrate by means of bond wires. The bond wires are guided such that one respective ball thereof is bonded to a terminal face while the wedge thereof is bonded directly to one of the bond pads.
Abstract:
Es wird ein Verfahren zur Herstellung eines keramischen Bauelements angegeben, wobei ein Grundkörper (SB) mit internen Elektroden, deren Außenkanten sich auf zumindest einer Außenoberfläche (OF1) des Grundkörpers befinden, sowie eine Zusammensetzung (EC) mit einem elektrophoretisch mobilen Isoliermaterial (IM) bereitgestellt werden. Das Isoliermaterial (IM) wird auf der Außenoberfläche (OF1) des Grundkörpers auf den Außenkanten der internen Elektroden mittels Elektrophorese strukturiert abgeschieden und zur Erzeugung einer elektrisch isolierenden Schicht (IS) auf den Außenkanten verwendet. Des Weiteren wird ein keramisches Bauelement mit einer derartigen isolierenden Schicht angegeben.
Abstract:
Es wird ein Mehrschichtbauelement angegeben, das ein dielektrisches keramisches Material umfasst, welches sich mit einer Varistorkeramik zu einem erfindungsgemäßen monolithischen Mehrschichtbauelement co-sintern lässt. Das Mehrschichtbauelement umfasst daher eine Schicht einer Varistorkeramik und eine andere Schicht eines Dielektrikums. Beide Schichten können im Mehrschichtbauelement unmittelbar benachbart angeordnet sein. Im Mehrschichtbauelement sind auf oder zwischen den keramischen Schichten Metallisierungen angeordnet, die zu Leiterabschnitten und metallisierten Flächen strukturiert sind. Die Metallisierungen bilden zusammen mit den Keramikschichten neben einem Varistor zumindest ein weiteres Bauelement aus, welches ausgewählt ist aus zumindest einer der Bauelementfunktionen Kapazität, Widerstand und Induktivität.