Abstract: The invention provides a glass-ceramic composite with sufficient strength and other excellent properties suitable for IC packages or multilayer substrates. The glass-ceramic composite of the invention includes crystallized glass and at least either of alumina and mullite at the ratio by weight of eighty through fifty-five to twenty through forty-five. The crystallized glass includes cordierite as primary crystals and contains 40 to 52 percent by weight of silicon dioxide or SiO.sub.2, 27 to 37 percent by weight of aluminum oxide or Al.sub.2 O.sub.3, 11 to 13 percent by weight of magnesium oxide or MgO, 2 to 8 percent by weight of diboron trioxides or B.sub.2 O.sub.3, 2 to 8 percent by weight of calcium oxide or CaO, and 0.1 to 3 percent by weight of zirconium oxide or ZrO.sub.2.

Abstract: A high heat-conductive, thick film multilayered circuit board for high speed signal transmission in a high frequency region has a substrate having high heat conductivity. An oxidized layer is formed on a surface of the substrate. Electrically conductive layers formed of a printed paste containing crystallized glass, and insulating layers formed of a printed insulating paste containing crystallized glass as a principal constituent are alternately disposed by printing on the oxidized layer of the substrate. The conductive and insulating layers are heated to form solid layers between successive printing steps. The substrate is AlN, Sic/BeO, SiC, Cu/W and/or ZrB.sub.2 having a heat conductivity of 40-140 W/m.multidot.k at room temperature. The layers have high adhesion strength to the substrate and the insulting layer has a low dielectric constant.

Abstract: A method of manufacturing an electrical connecting member having a holding member formed of an electrically insulative material, and a plurality of electrically conductive members provided in a mutually insulated state in the holding member, one end of each of the electrically conductive members being exposed on one surface of the holding member and the other end of each of the electrically conductive members being exposed on the other surface of the holding member, includes the steps of providing photosensitive resin which provides the holding member on a base body, applying light to the photosensitive resin through a photomask forming a predetermined pattern to thereby expose the photosensitive resin to the light, developing the photosensitive resin to form a plurality of apertures in the photosensitive resin, thereby exposing the base body, leaving the photosensitive resin through which the base body has been exposed in a heated atmosphere and/or a negative pressure atmosphere for a predetermined time, etc

Abstract: A process for producing a ceramic sintered body having a metallized via hole previously formed after lamination of the ceramics is disclosed and said process comprises immersing in a first liquid a ceramic semi-sintered body formed through heating at 500 to 900.degree. C. and having a large number of pores and a straight via hole, thereby to allow the first liquid to penetrate into the pores of the semi-sintered body, subsequently immersing the resulting semi-sintered body in a suspension of electrically conductive powder particles having an average particle size of 2 to 3 .mu.m in a second liquid incompatible with the first liquid, thereby to fill the via hole with the suspension, and then sintering the resulting semi-sintered body in a non-oxidizing atmosphere.

Abstract: A heat shrinkable laminate film is disclosed which includes a core layer formed of an ethylene-vinyl alcohol copolymer, two intermediate layers provided on opposite surfaces of the core layer and each formed of a copolymer selected from (a) copolymers of an unsaturated carboxylic acid or a derivative thereof and propylene and (b) copolymers of an unsaturated carboxylic acid or a derivative thereof and an alpha-olefin-propylene copolymer containing not greater than 10% by weight of alpha-olefin comonomer, and two outer layers provided on respective surfaces of the intermediate layers and each formed of an ethylene polymer.

Abstract: A biodegradable film or the like shaped article is formed from a composition including 100 parts by weight of cellulose fibers having a length of 3 mm or less and a diameter of 50 .mu.m or less, 10-600 parts by weight of a thermoplastic resin and 2-100 parts by weight of chitosan. A mixture containing (a) an aqueous solution of an acid salt of chitosan, (b) an aqueous dispersion or solution of a thermoplastic resin and (c) fine cellulose fibers is dried and shaped to obtain such a biodegradable shaped article.

Abstract: A seamless endless belt formed of a polyether-ether-ketone resin subjected to a specific simultaneous inflation-and-biaxially stretching treatment followed by an optional specific thermosetting/relaxation treatment as well as a process for manufacturing same is disclosed. This belt is manufactured by biaxially stretching a tube of a polyether-ether-ketone resin while inflating the tube at a temperature above the glass transition temperature of the resin but below the melting point of the resin, optionally and preferably thermosetting the stretched tube at 150.degree.-320.degree.C. while relaxing it at a rate of relaxation of 5-30% and then cutting the resultant tube in round slices. The stretched tube may be laminated with a tube of a thermoplastic polyurethane resin so as to form a laminate tube formed of a polyether-ether-ketone resin in the outer and inner tubes with, interposed therebetween, an intermediate tube of a thermoplastic polyurethane resin.

Abstract: A tubular multilayer film including at least two, biaxially stretched tubular layers each formed of a polypropylene resin, wherein the innermost layer contains spherical antiblocking agent particles having an average particle size of 0.2 to 5 .mu.m in an amount of 0.1 to 0.7% by weight, and the outermost layer is free of the spherical antiblocking agent particles is disclosed. The multilayer film may be prepared by biaxially stretching a multilayer tubular raw sheet having an innermost polypropylene layer containing spherical antiblocking agent particles and an outermost polypropylene layer free of such antiblocking agent particles.

Abstract: A composition for metalizing low temperature-fired ceramics according to the invention includes: a combination of two or three oxides selected from the group consisting of 1 to 8 percent by weight of bismuth(III) oxide (Bi.sub.2 O.sub.3), 0.1 to 5 percent by weight of MoO.sub.3, and 0.1 to 2 percent by weight of Cr.sub.2 O.sub.3 as well as a primary constituent, that is, mixture of copper (Cu) and copper(II) oxide (CuO) or mixture of copper(II) oxide (CuO) and copper(I) oxide (Cu.sub.2 O). The additives of the invention efficiently keep the resultant metalized layer out of cracks and prevent local sintering and burr of the metalized layer.

Abstract: A substrate having a low dielectric constant for use with electronic devices consisting essentially of porous crystalline glass. The composition of the crystalline glass is represented by the formula X-Al.sub.2 O.sub.3 -SiO.sub.2, where X is one or more of the metal oxides ZnO, MgO, Li.sub.2 O, ZrO.sub.2, B.sub.2 O.sub.3, P.sub.2 O.sub.5, Y.sub.2 O.sub.3 and BaO. The crystalline glass may also include a filler material such as a ceramic powder or non-glass material. The substrate initially has a particle size of approximately 5 microns or less, which provides a high mechanical strength to the substrate even at high porosities.

Abstract: A heat-shrinkable polypropylene film adapted to be printed with, particularly, a flexographic ink is disclosed, which comprises a single layer heat-shrinkable film of a polypropylene resin composition containing spherical silicone resin fine particles of 0.2 to 5 microns in average particle size in a content of 0.1 to 0.7% by weight or a multi-layer heat-shrinkable film wherein at least one of the surface layers is such a polypropylene resin composition, with at least one surface of the single layer film or one surface of the surface layer of the multi-layer film having been subjected to corona discharge treatment to such degree that wettability index of the treated surface becomes 36 to 42 dyn/cm.

Abstract: An imaging apparatus includes an imaging device, a transformer and a detecting device. The imaging device generates image signals corresponding to the appearance of a physical object which includes contrasting portions. The transformer transforms the image signals into a power spectrum signal having a signal level which varies in relation to the contrasting portions in the appearance of the object at a specified time. The transformation to a power spectrum signal may be performed by adding the image signals and then perform Fourier transformation on the resultant sum, or by performing Fourier transformation on each image signal and summing the respective transforms of the image signals.

Abstract: A biodegradable sheet is produced from an aqueous dispersion containing finely cut cellulose fibers and chitosan. The dispersion is maintained at a temperature T.sub.1 .degree.C. which is within the following range:t.ltoreq.T.sub.1 .ltoreq.t+30wherein t is the boiling point (.degree.C.) of water at a given reduced pressure and is continuously introduced into a defoaming zone maintained at the given reduced pressure and at a temperature within the same range as that of T.sub.1. In the defoaming zone, the dispersion is formed into a downwardly flowing laminar flow so that air entrapped therein is effectively removed therefrom. The defoamed dispersion is then passed through a die and is molded into a sheet which is subsequently dried.

Abstract: A process for preparing an electrical connecting member having a holding member comprises an electrically insulating material, a plurality of electroconductive members equipped in the holding member under the state mutually insulated from each other, one end of the each electroconductive member being exposed at one surface of the holding member, and the other end of the each electroconductive member being exposed at the other surface of the holding member, the process comprising the steps of:(A) constituting a matrix member by providing a photosensitive resin which becomes the holding member on both surfaces of a base member, respectively;(B) exposing and developing the respective photosensitive resins to form a plurality of holes through the photosensitive resins, thereby having the base member exposed;(C) curing the photosensitive resins;(D) etching away a part of the base member exposed;(E) filling an electroconductive member into the holes formed in the holding members coplanar with or protruded from the

Abstract: A process for preparing an electrical connecting member having a holding member with an electrically insulating material, and a plurality of electroconductive members. The electroconductive members are mutually insulated from each other and one end of each of the electroconductive members is exposed at one surface of the holding member and the other end is exposed at another surface of the holding member. A holding member is formed by forming a layer on a base member with the holding member having a photosensitive resin on the uppermost surface of the layer. The holding member is exposed and developed by forming a plurality of holes through the holding member, thereby exposing the uppermost surface of the layer. A part of the exposed layer is etched away and the holes on the holding member are filled with an electroconductive member. The remaining layer and base member are then removed.

Abstract: High heat-conductive, thick film multilayered circuit board for high speed signal transmission in a high frequency region, the circuit board comprising: a substrate having high heat conductivity; an oxidized layer formed on a surface of said substrate; an electrically conductive layer formed of a printed paste containing therein crystallized glass; and an insulating layer formed of a printed insulating paste comprised of crystallized glass as a principal constitutent, wherein at least one of said conductive layer and at least one of said insulating layer are alternately disposed by printing on the oxidized layer of said substrate, and said conductive and insulating layers have been heated to form solid layers. The substrate is AlN, SiC/BeO, SiC, Cu/W and/or ZrB.sub.2 having a heat conductively of 40-140 W/m.multidot.k at room temperature. The layers have high adhesion strength to the substrate and the insulating layer has a low dielectric constant.

Abstract: A metallizing composition for use with ceramics which comprises 100 parts by weight of a CuO-Cu combination consisting of 30 to 70 wt % CuO and 70 to 30 wt % Cu, at least one inorganic component selected from the group consisting of not more than 10 parts by weight of MnO.sub.2, not more than 7 parts by weight of Pt and not more than 5 parts by weight of Au, an organic binder, and a solvent.

Abstract: A thermally shrinkable film with a liquid detecting function is prepared by coating or printing one side of the film with an ink which turns color or dissolves upon contact with a liquid. An item or object to be packaged is packaged in a thermally shrinkable film. The thermally shrinkable film and the package are useful for detecting a liquid leaking from the packed item or object, or entering into the package from the outside. This permits a visual inspection of the quality of the item or object packaged therein or of contamination by a foreign substance.

Abstract: A method of preparing colored crystallized glass is disclosed, comprising the steps of:(a) adding to a crystallized glass material from 0.1 to 10 parts by weight of a coloring agent per 100 parts by weight of the crystallized glass material, said coloring agent having been prepared by preliminarily burning in an oxidizing atmosphere at a temperature of from 1,000.degree. to 1,400.degree. C. for at least 1 hour from 0.05 to 7 parts by weight of Fe.sub.2 O.sub.3, from 0.03 to 5 parts by weight of CoO, and at least one oxide selected from the group consisting of from 0.01 to 2.5 parts by weight of NiO and from 0.01 to 2.5 parts by weight of Cr.sub.2 O.sub.3, the amounts of the components of the coloring agent being given in parts by weight per 100 parts by weight of the crystallized glass material;(b) molding the resulting mixture under a pressure of from 500 to 3,000 kg/cm.sup.2 ; and(c) calcining the molded mixture to effect crystallization heat treatment.

Abstract: An artificial radix dentis comprises a prong portion buried in an alveolar bone, which is made of a SiC-based ceramic material or is covered with a SiC-based film.