Polyorganosiloxane fine particles represented by the averabe composition formula, RaSiOb wherein R represents a substituted or unsubstituted monovalent hydrocarbon group, and a and b are numbers defined by the formulae 1

An electronic component mounting and packaging assembly, comprises: an insulating substrate having a recess therein and a plurality of electronic component connection locations on the substrate disposed at a distance from the recess; a plurality of first conductors each having an end spaced about the periphery of the mouth of the recess, wherein the first conductors are electrically coupled to the...

Semiconductor device having a package structure with a lead base and a cap is made by: fixing a chip (1) to a lead base (2); placing a fixation pellet (50) of material which melts and then hardens when heated in a cap (6); placing the base and chip upside down on the pellet in the cap; and heating to melt and harden the pellet and fix the base-chip to the cap.

According to the invention, the surface of a blank to be shaped into a product is decorated by marking on a test blank a plurality of reference points distributed over the entire surface of the test blank which will be affected by the shaping. The test blank is then shaped into a test product and the positions of the reference points are determined. A block of decoration to be obtained on the prod...

A composition for forming a viscoelastic mass for noisedamping purposes contains an aqueous suspension of a synthetic resin with particular properties in terms of temperature T?max' elongation to rupture and residual elongation, a hydraulic cement and an aggregate. DI.Pf/St 89 11 24

The present invention relates to total and partial esters of alginic acid with alcohols of the aliphatic, araliphatic, cycloaliphatic, aliphatic-cycloaliphatic and heterocyclic radicals, and salts of said partial esters with inorganic and organic bases. The said partial ester are not a partial ester of bivalent aliphatic alcohols. These compounds are intended to be used in pharmaceutical. applicat...

The flip-flop semiconductor IC has a substrate with a wiring layer formed on its top surface with a semiconductor element mounted top face down on the substrate and connected to the wiring layer. A cap with an opening smaller than the external size of the element is bonded around its edge to the substrate and around its opening to the bottom face of the element. A heat sink mounted on the cap has ...

A crystalline lactitol monohydrate having lattice cell constants a = 7.815 +/- 0.008 ANGSTROM , b = 12.682 +/- 0.008 ANGSTROM , and c = 15.927 +/- 0.008 ANGSTROM , and a melting range between 90 and 105 DEG C, and a water content between 4.85 and 5.15%, as well as a process of preparing said crystalline lactitol monohydrate by evaporating the aqueous solution of lactitol to a concentration betw...

Novel N-acyl-lysogangliosides obtained from gangliosides by deacyation of the ceramide group, wherein the acyl group is derived from an aliphatic acid having from 2 to 24 carbon atoms, substituted by one or more polar groups. The N-acyl-lysogangliosides of the invention exhibit an inhibiting action on protein-kinase C activation and, thus, can be utilized in therapies for various pathologies of th...

Novel derivatives of lysophingolipids free from sialic acids which are N-acyllysosphingolipids having one of the two formulae: (I) (II) in which -A- stands for the group -CH=CH- or -CH2-CH2-, n1 is a whole number of between 6 and 18, n2 a whole number of between 11 and 15, X is a hydrogen atom or the residue of a monosaccharide or a disaccharide or phosphorylcholine and R represents an alkyl...

Pipes or shaped pieces used in water piping, especially industrial or hot water conduits, comprise crosslinked polyolefin produced by chemical incorporation of a silane and subsequent hydrolysis. In order to avoid losing the ready processability or good welding properties of the uncrosslinked polymer during installation of the piping, the finished tubes or shaped pieces are packed or stored in the...

Pipes or shaped pieces used in water piping, especially industrial or hot water conduits, comprise crosslinked polyolefin produced by chemical incorporation of a silane and subsequent hydrolysis. In order to avoid losing the ready processability or good welding properties of the uncrosslinked polymer during installation of the piping, the finished tubes or shaped pieces are packed or stored in the...

Pipes or shaped pieces used in water piping, especially industrial or hot water conduits, comprise crosslinked polyolefin produced by chemical incorporation of a silane and subsequent hydrolysis. In order to avoid losing the ready processability or good welding properties of the uncrosslinked polymer during installation of the piping, the finished tubes or shaped pieces are packed or stored in the...

INHIBITION OF COKE FORMATION DURING VAPORIZATION OF HEAVY HYDROCARBONS An improved process for vaporizing a crude petroleum feedstock, preferably one boiling in the vacuum gas oil range or higher, prior to thermal cracking to olefins (8), wherein such feedstock is preheated (2,3), in one or more stages, in the convection section of a tubular steam cracking furnace (1), characterized by hydrogen, p...

Hybrid-type circuit substrate comprises an A1203 plate (1) which is bonded to an A1N plate (2), e.g. in an aperture of the A1203 plate. On the wall face (1b) of the aperture, a metallised layer (3), of Mo or W, is formed, followed by a plating layer (4), e.g. Ni plate. On the side face (2a) of the A1N plate is a metallised layer (5) and a plating layer (6). The plated surfaces are bonded by solder...

An echo cancellation modem for full-duplex communication over a channel with a remote device in accordance with one of several possible modulation schemes suitable for different channel qualities, respectively. The modem includes an echo canceller for reducing echo components appearing in the channel signal while leaving a residual echo component in the echo reduced channel signal, a monitor for d...

An electric circuit pattern is formed on a substrate by (i) coating a soln.-retaining film on a substrate where the soln.retaining film allows a soln. that contains an electric circuit element-forming material and a solvent for permeation and retention at the position at which the soln. initially contacts the film; (ii) depositing the soln. on the film in accordance with a predetermined pattern; (...

Circuit substrate includes at least part of an electrode to be soldered formed of an alloy of (in mol%) Cu-35-25 and Ni 65-75, so that diffusion of solder into the electrode can be avoided while a protective inorganic layer, pref. SiO2, and the solder have good adhesion to the electrode.

The invention relates to a composite product formed of flock - to which is added a binder - obtained by shredding a felt (1) based on insulating mineral fibres. The said flock is obtained by means of a carding device for a felt of insulating mineral fibres, which device comprises a unit (2, 3) for feeding in the felt, a brush equipped with flexible bristles (5), and a comb (7).

A security sealing mechanism (S) for a bag or envelope is mounted on that end of coupling element rows (5, 5) to which a slider (6) comes for closing a slide fastener (Z). The security sealing mechanism (S) comprises a sealing body (1) including an abutting surface (9) disposed at the end thereof contiguous to the coupling element rows (5, 5) for receiving the slider (6) and locking means (12, 12a...