Abstract: An improvement in a process of forming ceramic articles comprising oil-based components or extrusion aids, the improvement including removing the oil-based components after drying and prior to firing by flowing a heated gas through the green ceramic honeycomb articles to evaporate and condense the oil-based components, with or without microwave radiation.

Abstract: The objective of the present invention is to provide a process for manufacturing an electrostatic chuck which does not have a dispersion in chucking force depending on place and is capable of adsorbing a semiconductor wafer evenly. A process for manufacturing an electrostatic chuck according to the present invention comprises steps of: printing a conductor containing paste for an electrode on a green sheet which has a surface roughness, Rmax, of 200 &mgr;m or less; forming a lamination by stacking another green sheet or other green sheets on said green sheet; and then sintering said lamination.

Abstract: Allows tesseras to be obtained with optimal results in the creation of a mosaic. A terracota support is realised of an optimal size of 100×100 mm and a thickness of between 1.5 and 3 mm, subject to allowances for working, also by a craftsman, The support 1 made to allowances for working, also by a craftsman The support 1 made out of clay, before firing is scored or moulded on the rear part with grooves which are regular, parallel and perpendicular or oblique, at a distance of betwen 5 and 10 mm (or other, according to requirements) with a depth of between about 0.75 and 1.5 mm. After the first kil firing, one then proceeds to the kiln glazing of the front part 2. The grooves 3 allow an easy and regular breaking of the glazed tile. With its breaking the tesseras are obtained, with perfect edges and the rear part no visible, thanks particular to the reduced thichness. This then allows an easy resizing with side-cutting nippers of the tessera and the adaptation thereof to the design.

Abstract: A method of producing a polytetrafluoroethylene (PTFE) material including the steps of extruding a first material to form a first extrudate, and extruding a second PTFE material to form a second extrudate, wherein the first PTFE material is more expandable than the second PTFE material. A stack is formed from at least one layer of the first extrudate and at least one layer of the second extrudate, and the stack is expanded and sintered to form the article.

Abstract: A method of controlling shrinkage in aligned green tape stacks during firing comprises providing a topmost layer of a ceramic material having a sintering temperature higher than that of the ceramic used to make the green tapes and firing above the sintering temperature of the green tape ceramic but below the sintering temperature of the topmost layer ceramic. The method of the invention provides improved shrinkage control for green tape stacks on a support substrate.

Abstract: This invention is directed to a process for the fabrication of features on a display panel utilizing fibers or ribbons comprising organic polymer and inorganic material, the inorganic material containing phosphoe, conductrice metals or dielectric particles.

Abstract: A multilayer ceramic electronic component includes an electronic component body a notch formed in a side surface of the electronic component body, and a joining electrode formed by dividing a joining via hole conductor is formed at a portion of an inside surface defining the notch. A cover that is mounted to the electronic component body has a leg, with the leg of the cover being positioned inside the notch. By joining the leg to the joining electrode, the cover is secured to the electronic component body. The multilayer ceramic electronic component includes an LGA (land grid array) type external terminal electrode.

Abstract: A method of fabricating a thermal conductive plug of a ceramic substrate of a multi-chip package. A plurality of conductive openings and thermal conductive openings are formed on green tapes. A metal paste is filled into the conductive openings and the thermal conductive openings. The green tapes are stacked together so that the metal paste inside the conductive openings and the thermal conductive openings of every green tape is in contact respectively with its neighboring metal paste within the conductive openings and thermal conductive openings of the green tapes. Cofire those green tapes and the metal paste to form a pre-substrate. The pre-substrate comprises an insulating structure, a plurality of thermal conductive plugs and conductive plugs.

Abstract: A method for fabricating composite light-weighted glass ceramics, suitable for use as, e.g. mirror blanks or microlithography stages, at low temperatures is disclosed. Component pieces are polished then joined at low temperature using a silicate-containing joining liquid. Assembly is then performed in such a way that the joining liquid forms an interface between each component. After a period of low or slightly elevated temperature curing, rigid joints are formed throughout and the composite is dimensionally, vibrationally, and temperature stable and can withstand tensile stresses >4000 psi. The room-temperature cured composite can be heat treated using a slow, systematic temperature increase to dehydrate the joints. A sealing coating may optionally be provided to prevent excess dried joining liquid from flaking off the formed joint.

Abstract: A multi-layer tile material produced from layers of alumina enhanced thermal barrier material having different densities. The insulation layers are bound together by a high strength, high temperature alumina or silica binder having a coefficient of thermal expansion similar to that of the insulation layers. Use of the multi-layered tile allows the problems of tile slumping and of insufficient heat management associated with low density alumina enhanced thermal barrier tile to be overcome.

Abstract: Very thin cast ceramic tape, preferably approximately 12 &mgr;m in thickness, is wrapped, preferably in a reversing spiral or helix, around a mandrel, preferably a mandrel made of steel and coated with a wax releasing agent, for so many times, preferably five or greater, as achieves a desired thickness of a tube wall, preferably about 100 &mgr;m. The green ceramic tube is then laminated in a pressure laminator, preferably a hydrostatic laminator at 3000 to 5000 psi, linking polymer chains between each ceramic layer, cross-linking polymer chains within each ceramic layer, and densifying the produced ceramic laminate tube by reducing porosity.

Abstract: A method for the production of joints between ceramic bodies such as silicon carbide bodies in which a preceramic polymer mixed with a powder, such as bimodal silicon carbide, is applied in slurry form. The mechanical and hermetic properties may be enhanced by the inclusion of additional bodies constraining the polymer slurry in the joint region, such as a collar. The thermal processing of the joint is described which provides a useful joint.

Abstract: A method of forming a novel high temperature superconducting Josephson junction which is capable of achieving a formation of a Josephson junction having high characteristic conveniently and quickly without necessitating costly micromachining facilities. Two high temperature superconducting whisker crystals are crossed with each other on a substrate and subjected to thermal treatment to form a Josephson junction between the two high temperature superconducting whisker crystals.

Abstract: A composite construction 1 is obtained by coating the outer periphery of a core material 2 with a shell layer 3. The core material 2 is composed of a first sintered body that is obtained by bonding, with a binder metal, a first hard particle composed of one or more of carbides, nitrides and carbonitrides of metals of Groups 4a, 5a and 6a of the Periodic Table, or a first ceramics obtained by bonding, with a sintering additive, a first ceramic particle composed of at least one of oxides, carbides, nitrides and carbonitrides selected from the group consisting of metals of Groups 4a, 5a and 6a of the Periodic Table, Al, Si and Zn. The shell layer 3 is composed of a second hard sintered body or second ceramics having a different composition from the first hard sintered body. The ratio of the residual free carbon amount Cin in the core material 2 to the residual free carbon amount Cout in the shell layer 3, Cin/Cout, is 0.5 to 2.

Abstract: A ceramic green body made up of at least two ceramic green sheets that are glued together with a liquid adhesive is described. Further, a method of manufacturing a ceramic green body of this type is described, the surface of a first ceramic green sheet initially being provided at least in sections and at least on one side with the liquid adhesive, and the first ceramic green sheet being subsequently glued to a second ceramic green sheet. Finally, it is proposed to manufacture a ceramic body using this ceramic green body, which may be used, for example, in planar, ceramic exhaust gas sensors, or in ceramic multilayer hybrids as circuit carriers. To this end, after being glued, the ceramic green body is subjected to a heat treatment, during which the polymer matrix of the ceramic green sheets is first at least largely thermally decomposed and/or evaporated, and the body that remains is subsequently sintered.

Abstract: A method of making a component of a ceramic discharge chamber comprising the steps of forming a ceramic composition including an aluminum powder, a binder and a grain growth inhibitor. The alumina powder has a tap density greater than 1.0 gram per cc. The ceramic composition is then die pressed to form a component preform. Next, the component preform is heated to remove at least a substantial portion of the binder.

Abstract: A ceramic composition is provided to insulate ceramic matrix composites under high temperature, high heat flux environments. The composition comprises a plurality of hollow oxide-based spheres of various dimensions, a phosphate binder, and at least one oxide filler powder, whereby the phosphate binder partially fills gaps between the spheres and the filler powders. The spheres are situated in the phosphate binder and the filler powders such that each sphere is in contact with at least one other sphere. The spheres may be any combination of Mullite spheres, Alumina spheres, or stabilized Zirconia spheres. The filler powder may be any combination of Alumina, Mullite, Ceria, or Hafnia. Preferably, the phosphate binder is Aluminum Ortho-Phosphate. A method of manufacturing the ceramic insulating composition and its application to CMC substrates are also provided.

Abstract: A green sheet stack having a cavity is produced, and a shrinkage-reducing sheet containing inorganic powder material, which is not fired in a step of firing the green sheet stack, is prepared. The shrinkage-reducing sheet is placed so as to close an aperture of the cavity and to cover an end face in the sheet-stacking direction of the green sheet stack. The green sheet stack is pressed via an elastic member in the sheet-stacking direction so that the shrinkage-reducing sheet is cut and a shrinkage-reducing sheet piece formed of a cut portion of the shrinkage-reducing sheet is placed on a bottom surface of the cavity. The green sheet stack is fired in such a state in which the shrinkage-reducing sheet piece is placed on the bottom surface of the cavity.

Abstract: The present invention relates to a method to achieve the suppression of planar shrinkage in LTCC ceramic tape laminate structures without externally applied forces or sacrificial constraining tape. The method utilizes a non-sacrificial constraining tape that constrains a tape assembly.

Abstract: A paper-feed roller and a fabrication method thereof in an office automation machine, such as a photocopier, a printer, and a facsimile machine, etc, includes forming a plastic roller along a general stainless shaft by a molding and forming a ceramic coating layer on a surface of the plastic roller. Accordingly, the paper-feed roller is capable of providing an economical effect in a fabrication cost and preventing a slipping of paper or a paper jam that is caused by a heat distortion and an abrasion occurring on a surface of a long time operated roller.

Abstract: A method of manufacturing a ceramic matrix composite comprises forming a slurry comprising a ceramic sol, filler particles and a solvent and forming laminates of fibers (12). The laminates of fibers (12) are impregnated with the slurry and are stacked (14) on a mold (10). The stack (14) of laminates of fibers (12) is covered by a porous membrane (16), a breather fabric (18) and a vacuum bag (20). The vacuum bag (20) is evacuated and is heated to a temperature of 60° C. for 10 hours to produce a ceramic matrix composite. The ceramic matrix composite is then heated to a temperature of 1200° C. at atmospheric pressure to sinter the ceramic matrix composite.

Abstract: The present invention provides an oxide superconducting wire including a component provided in the form of a tape and a metal tape. The component in the form of a tape has an oxide superconducting member and a metal coating member formed mainly of silver and coating a surface of the oxide superconducting member. The metal tape, bonded in a heat treatment (e.g., fusion- or diffusion-bonded) to a surface of the component in the form of a tape, does not contain any superconducting material and it is formed mainly of silver and it also contains at least one component other than silver.

Abstract: Disclosed is a method for manufacturing a laminated LC filter, the method involving the steps of forming capacitor and inductor parts through separate sintering processes and then bonding the two parts using a glass-based adhesive. The use of the present method can solve problems of delamination and shape deformation caused by the difference in shrinkages occurring during a co-sintering process of the dielectric layer constituting the capacitor part and the magnetic layer constituting the inductor part. Also, since the method dose not use any extra buffer layer, there is no need to consider the shrinkage reduction and the composition of the buffer layer, and so the compositions of the dielectric and magnetic layers can be freely designed.

Abstract: A ceramic matrix composite part having elongated cooling channels within the wall thereof is manufactured by inserting decomposable inserts within a woven ceramic fiber preform. The inserts are tows of continuous carbon fibers surrounded by a carbonaceous filler, and are inserted where the channels are desired. The preform, with the inserts in place, is disposed within a mold. A ceramic matrix material is added and the fiber preform is consolidated with the ceramic matrix material. The consolidated part is then heated to thermally decompose the inserts to create the elongated channels within the part. The inserts may be flexible and woven into the preform using an automated weaving loom, or they may have limited flexibility and be inserted by machine or by hand.

Abstract: A multilayer ceramic micropump including a monolithic ceramic package formed of a plurality of ceramic layers defining therein an integrated first ball check valve, and a second ball check valve in microfluidic communication with the first ball check valve, and an actuator characterized as actuating a pumping motion, thereby pumping fluids through the first ball check valve and the second ball check valve.

Abstract: A thermal shock-resistant ceramic article and a method of manufacturing the article include alternating layers of a first material (2) comprising a fusible, particulate ceramic composition and a second material (3), typically comprising a porous, pyrolyzable material. The layered structure increases the article's work of fracture and toughness, and may lead to improved thermal shock-resistance. The method advantageously uses a sheet, film or sleeve to prepare the article for firing. The composition, thickness, and porosity of the second material (3) will affect the desired properties. The method is particularly adapted for manufacturing cylindrical articles, including stopper rods, nozzles, and pouring tubes for the metal casting industry.

Abstract: A composite laminate includes first sheet layers and second sheet layers. The first sheet layers include a first particulate aggregate and the second sheet layers include a second particulate aggregate. Each of internal second sheet layers is disposed between two first sheet layers and two external second sheet layers constitute two main faces of the composite laminate. The thickness of the internal second sheet layers is greater than the thickness of the external second sheet layers. The first sheet layers and the second sheet layers are bonded to each other by penetration of a part of the first particulate aggregate contained in the first sheet layers into the second sheet layers. This configuration can reduce the transverse shrinkage in the firing step of the composite laminate.

Abstract: A component formed at least in part by a CMC material and equipped with an integrally-formed surface feature, such as an airflow enhancement feature in the form of a turbulator or flow guide. The CMC material comprises multiple sets of tows woven together to form a preform that is infiltrated with a matrix material. The surface feature is integrally defined at a surface of the cooling passage by an insert member disposed between adjacent tows of at least one of the tow sets. The insert member has a cross-sectional size larger than the adjacent tows, forming a protrusion in the preform that defines the surface feature in the infiltrated, consolidated and cured CMC material.

Abstract: A process produces a fiber-reinforced silicon carbide composite. The resulting composite has a high toughness where bundles of a reinforcing fiber are densely covered with glassy carbon derived from a resin to avoid deterioration of the strength, and it can easily be produced even in complicated shapes. Specifically, a fiber-reinforced silicon carbide composite is produced by preparing a fiber prepreg containing a powdered silicon and a resin and molding the prepreg to yield a green body having a desired shape, or laminating a fiber prepreg containing a resin and a woven fabric prepreg containing a powdered silicon and a resin in alternate order, and molding the laminate to yield a green body having a desired shape; carbonizing the green body at 900° C. to 1350° C. in an inert atmosphere; impregnating the carbonized body with a resin; firing the impregnated body again at 900° C. to 1350° C.

Abstract: The present invention relates to a process for producing a laminated sheet comprising an alumina fiber precursor, which process comprises spinning out an alumina fiber precursor from a solution mainly comprising an aluminum compound, falling and stacking said alumina fiber precursor on the surface of an accumulator to form a thin lamina sheet of alumina fiber precursor, continuously pulling out said lamina sheet from the accumulator, transferring the resultant lamina sheet to a folding device, and folding the sheet by a predetermined width while stacking the folded sheet and continuously moving the stacking sheet in the direction orthogonal to the folding direction.

Abstract: The space between a material sheet laminate 105 and the inner wall of a processing chamber 13a is filled with a buffer material. The material sheet laminate is heated in a firing furnace while the material sheet laminate is pressurized through the buffer material in a way of reducing the volume of a processing chamber 13a by loading of a weight 17. In this way, the material sheet laminate 105 is fired which it is pressurized from all the directions through the buffer material 14. This suppresses the warp of a ceramic laminate 100 due to the densification phenomenon occurring during the step of firing the material sheet laminate 105, thereby providing the ceramic laminate 100 with no warp.

Abstract: A green sheet including a binder containing an acrylic resin having no polar group and a ceramics material in powder is prepared, and connection via are formed in the green sheet. Further, a conductor layer having virtually no voids is placed on the green sheet and a mask is also placed on the conductor layer. Then, the conductor layer is patterned by wet-etching so that wiring is formed thereon. A plurality of the green sheets thus formed are laminated, and a binding sheet, which contains an inorganic composition that has virtually no sintering shrinkage at the firing temperature of the multi-layered body as a main component, is formed on either both surfaces or one surface of the laminated body, and this is then fired, and thereafter, the binding sheet is removed.

Abstract: A method for fabricating a multilayered structure out of sheets of green-tape without the application of high pressures includes the step of applying an adhesive to the sheets of green-tape. Selection of an adhesive with a polymer that decomposes at a higher temperature than the binder present in the green-tape promotes stability of the interfaces during the firing process and promotes void-free sintering within the interfacial regions.

Abstract: A binder system for forming a ceramic body, such as a translucent arc tube for a metal halide lamp, comprises a hydrocarbon, such as a paraffin wax, a copolymer, such as poly (ethylene-co-vinyl acetate), and optionally a surfactant. The binder system is mixed with a ceramic powder and heated to above the melting point of the binder. The heated mixture is formed into a compact having the general shape of the finished ceramic body and then cooled or allowed to cool. The hydrocarbon and copolymer have overlapping freezing points so that when the shaped compact cools, crystalline segments of the copolymer (such as ethylene segments) co-crystallize with the hydrocarbon, while amorphous segments (such as vinyl acetate) form bridges between the crystalline regions. As a result, the cooled compact has improved green strength over conventional binder systems.

Abstract: The present invention relates to a process for producing a laminated sheet comprising an alumina fiber precursor, which process comprises spinning out an alumina fiber precursor from a solution mainly comprising an aluminum compound, falling and stacking said alumina fiber precursor on the surface of an accumulator to form a thin lamina sheet of alumina fiber precursor, continuously pulling out said lamina sheet from the accumulator, transferring the resultant lamina sheet to a folding device, and folding the sheet by a predetermined width while stacking the folded sheet and continuously moving the stacking sheet in the direction orthogonal to the folding direction.

Abstract: A composite laminate includes first sheet layers and second sheet layers. The first sheet layers include a first particulate aggregate and the second sheet layers include a second particulate aggregate. Each of internal second sheet layers is disposed between two first sheet layers and two external second sheet layers constitute two main faces of the composite laminate. The thickness of the internal second sheet layers is greater than the thickness of the external second sheet layers. The first sheet layers and the second sheet layers are bonded to each other by penetration of a part of the first particulate aggregate contained in the first sheet layers into the second sheet layers. This configuration can reduce the transverse shrinkage in the firing step of the composite laminate.

Abstract: Systems and methods are described for loss dielectrics. A method of manufacturing a lossy dielectric includes providing at least one high dielectric loss layer and providing at least one high thermal conductivity-electrically insulating layer adjacent the at least one high dielectric loss layer and then densifying together. The systems and methods provide advantages because the lossy dielectrics are less costly and more environmentally friendly than the available alternatives.

Abstract: A method of producing a water slide transfer, whereby a design is formed on a backing paper with a soluble release layer thereon, a covercoat is formed on a release paper, one combination is caused by placing the two papers on top of each other with the covercoat adjacent the design, with heat and/or pressure being applied such that the covercoat locates onto the design and can be freed from the release paper.

Abstract: An improved method for manufacturing a porcelain object in a desired shape, from a mixture of at least clay, feldspar and quartz. According to the method, an aqueous dispersion of vinyl acetate and ethylene based copolymer is added to the mixture, and the mixture transformed into an aqueous mass in the shape of a foil with a thickness of 50 &mgr;m to 3 mm and dried. The dried foil is then formed into a desired object shape, and permanently hardened by a ceramic firing process. The dried foil may be brought into the desired object shape by known processes such as rolling, laminating, calendering, cutting, punching, paper folding methods and deep drawing. Once brought into the desired object shape, no drying is required before ceramic firing.

Abstract: A method for the production of joints between ceramic bodies such as silicon carbide bodies in which a preceramic polymer mixed with a powder, such as bimodal silicon carbide, is applied in slurry form. The mechanical and hermetic properties may be enhanced by the inclusion of additional bodies constraining the polymer slurry in the joint region, such as a collar. The thermal processing of the joint is described which provides a useful joint.

Abstract: A multilayered microfluidic device having a substantially monolithic structure is formed by sintering together a plurality of green-sheet layers. The substantially monolithic structure has an inlet port for receiving fluid, an outlet port for releasing fluid, and an interconnection between the inlet port and the outlet port. The substantially monolithic structure may also include a variety of components to enable useful interaction with the fluid, such as electrically conductive pathways, heaters, fluid sensors, fluid motion transducers, and optically transmissive portions. The components are preferably fabricated using thick-film or green-sheet technology and are preferably co-fired with and sintered to the green-sheet layers to become integral with the substantially monolithic structure.

Abstract: A low temperature co-fired ceramic assembly (LTCC) with a constraining core to minimize shrinkage of outer ceramic layers during firing. The outer ceramic layers have high density circuit features. A ceramic core includes several ceramic layers. Several via holes are located in the first and second ceramic layers. Several low density circuit features are located on the ceramic layers that make up the core. Outer ceramic layers are placed top and bottom of the ceramic core. The outer ceramic layers have via holes and high density circuit features. The circuit features patterned on the ceramic layers include resistors, capacitors, circuit lines, vias, inductors, or bond pads. The ceramic core is fired first in a furnace. The outer layers are then laminated to the ceramic core and fired. The ceramic core controls the shrinkage rate of the outer ceramic layers during firing allowing higher density circuit features on the outer layers.

Abstract: A multilayer ceramic micropump including a monolithic ceramic package formed of a plurality of ceramic layers defining therein an integrated first ball check valve, and a second ball check valve in microfluidic communication with the first ball check valve, and an actuator characterized as actuating a pumping motion, thereby pumping fluids through the first ball check valve and the second ball check valve.

Abstract: A method for producing the piezoelectric thin film is based on a sol-gel process and comprises the steps of: coating a substrate with a sol composition comprising a sol, of a metal component for constituting a piezoelectric film, and a polymer compound and then drying the coating to form a film; pre-sintering the film to form a porous thin film of gel comprising an amorphous metal oxide; pre-annealing the porous thin film of gel to convert the film to a film of a crystalline metal oxide; repeating the steps at least once to form laminated films of a crystalline metal oxide; and annealing the films thus prepared to grow crystal grains of perovskite type in the film into a larger size.

Abstract: A method to control the post sinter distortion of free sintered multilayer ceramic substrates by placing a discrete non-densifying structure in the green ceramic laminate prior to sintering. One or several discrete non-densifying structures are placed on one or more ceramic greensheets which are then stacked and laminated to form a green ceramic laminate. The laminate is then sintered and the discrete non-densifying structure will locally control the dimensions of the free sintered multilayer ceramic substrate. The method can be used to control post sinter dimensions in MLC substrates manufactured as either single or multi-up substrates by placing the discrete non-densifying structure in the active area or in the kerf area between the individual product ups prior to sintering.

Abstract: A micro-gas chromatograph column is formed by texturing a channel into a plurality of green-sheet layers, which are then sintered together to form a substantially monolithic structure. A thick-film paste may be added to the channel textured in the green-sheet layers to provide a porous plug sintered in the micro-gas chromatograph column in the substantially monolithic. A thermal conductivity detector is formed in the substantially monolithic structure by depositing a conductive thick-film paste on the surface of one of the green-sheet layers to define a resistor in an exit channel of the micro-gas chromatograph column.

Abstract: An intermediate low-pressure laminated ceramic device is formed from a plurality of layers of unfired ceramic material each including ceramic particles in an organic binder. A polymer interfacial layer having a glass transition temperature such that it flows at a temperature below a temperature required for the unfired ceramic layers to substantially deform, is deposited on one surface of each of the unfired ceramic layers. The unfired ceramic layers are stacked with an interfacial layer positioned between adjacent unfired ceramic layers in the stack. The stack is heated to a temperature greater than the glass transition temperature of the interfacial layers and a pressure is applied to the heated stack below approximately 1200 psi to fixedly bond the plurality of layers in the stack together.

Abstract: A cold isopressing method in which two or more layers of material are formed within an isopressing mold. One of the layers consists of a tape-cast film. The layers are isopressed within the isopressing mold, thereby to laminate the layers and to compact the tape-cast film. The isopressing mold can be of cylindrical configuration with the layers being coaxial cylindrical layers. The materials used in forming the layers can contain green ceramic materials and the resultant structure can be fired and sintered as necessary and in accordance with known methods to produce a finished composite, ceramic structure. Further, such green ceramic materials can be of the type that are capable of conducting hydrogen or oxygen ions at high temperature with the object of utilizing the finished composite ceramic structure as a ceramic membrane element.

Abstract: A method for producing ceramic composite bodies, in particular, cylindrical ceramic bodies for sheathed-element glow plugs, in which a plurality of shaping sleeves, which accommodate piece parts premolded by cold pressing, are inserted into corresponding bore holes of a vertically standing supporting plate that is heated via additional bore holes with the aid of cartridge heaters or a heat transfer liquid. The vertically standing supporting plate with the shaping sleeves is then clamped between two press plates of a press, and the piece parts located inside are subsequently pressed by press pins which, on both sides, pass through the press plates and into the shaping sleeves. Upon completion of the necessary pressure keeping period, the pressed compound, after retraction of the press pins and opening the press, can be hardened in a non-pressurized manner in the shaping sleeves located in the withdrawn supporting plate that is subjected to further heating.

Abstract: Pre-fired ceramic substrates are elected according to the desired electrical performance of the filter. If necessary for enhanced performance, the surfaces of the substrate may be lapped to assure that their top and bottom surfaces are parallel and their surface finish is smooth. The top surface of a lower layer is coated with a conductive film using thick film techniques then patterned to define the filter trace pattern. For precise dimensional control, photolithographic techniques may be used. The bottom and the sides of the lower layer are coated with the same conductive film. A seal glass which has a coefficient of thermal expansion which is matched as closely as possible to that of the ceramic substrate is screen printed onto the top surface of the lower layer. The top of the upper layer is screen printed with the conductive film and the bottom of the upper layer is coated with the seal glass. The upper and lower layers are bonded together by clamping them together and firing the seal glass.