Abstract: A sheet with a built-in IC chip in which mechanical external forces do not significantly impinge on the IC chip and the IC chip does not separate or become damaged, and a tape with a built-in IC chip used for the sheet with a built-in IC chip. In the tape with a built-in IC chip, a part or all of the IC chip is embedded in a tape body.

Abstract: The present invention relates to a sheet with at least one built-in IC chip, the sheet being scarcely influenced by a mechanical external force and being free from loss or damage of the IC chip, and relates to a tape with at least one built-in IC chip used for the sheet with at least one built-in IC chip. The tape with at least one built-in IC chip is characterized in that a part or all of the IC chip 10 is embedded in a recessed portion 20a formed on a tape body, and the tape body 20 includes: a first base material 21; an adhesive layer 22 laminated on the first base material and formed of an adhesive; and a second base material 23 laminated on the adhesive layer; the second base material 23 being removed from the recessed portion 20a and the periphery thereof, and the adhesive in the recessed portion 20a of the adhesive layer 22 being pushed to the periphery thereof, and the pushed adhesive filling in a gap between the periphery of the IC chip 10 and the second base material 23.

Abstract: The invention provides a heat-sensitive recording medium comprising (a) a support and (b) a heat-sensitive recording layer formed on the support and comprising a colorless or pale-colored basic dye and a color developing material capable of causing color development upon contact with the dye by heating, which medium is characterized in that the heat-sensitive recording layer contains at least one phosphate compound selected from the group consisting of 2,2'-methylenebis(4,6-di-tert-butylphenyl) phosphate of the general formula (1) shown below and alkali metal, ammonium and polyvalent metal salts thereof: ##STR1## wherein R represents a tert-butyl group.

Abstract: A heat-sensitive recording material comprises a recording layer formed on a base sheet where the recording layer comprises a colorless or pale colored basic chromogenic material, a color developing material which develops a color by contacting with said chromogenic material, and a stabilizer.

Abstract: A heat sensitive recording material comprising a substrate and a heat sensitive recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor reactive with the dye to form a color when contacted therewith, the recording material being characterized in that the material has a heat sensitive recording layer having incorporated therein (1) a heat-fusible substance exhibiting a weight reduction of at least 5% at 200.degree. C. based on the weight at 25.degree. C. under the condition of 20.degree. C./min in the rate of rise of temperature, (2) a wax, (3) a lubricant, and (4) an oil-absorbing pigment at least 85 ml/100 g in oil absorption.

Abstract: A process for preparing a diphenylalkene derivative of the formula [II] ##STR1## which comprises oxidizing a diphenylalkanoic acid derivative of the formula [I] ##STR2## wherein R.sub.1 and R.sub.2 are each substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aralkyl or substituted or unsubstituted aryl, R.sub.1 and R.sub.2 may form a heteroring together theirwith or with an adjacent benzene ring, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10 and R.sub.11 are each hydrogen atom, halogen atom, substituted or unsubstituted alkyl, substituted or unsubstituted hydroxyl or substituted or unsubstituted amino, R.sub.12 and R.sub.13 are each hydrogen atom or substituted or unsubstituted alkyl, X is carboxyl, amide, ester or halide thereof.

Abstract: In a heat-sensitive recording material comprising on a substrate a recording layer containing a colorless or pale-colored basic dye and an electron accepting reactant material, the heat-sensitive recording material which is characterized in that the basic dye comprises at least one chromeno compound represented by the formula [I] below ##STR1## wherein G and R.sub.1 .about.R.sub.4 are defined in the specification.

Abstract: In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the dye to form a color when contacted therewith, the recording material characterized in that (a) as the basic dye are used 100 parts by weight of a specific phthalide derivative of the formula [I] and 20 to 100 parts by weight of a specific black color-forming fluoran derivative of the formula [II], (b) as the color acceptor is used a polyvalent metal salt of an aromatic carboxylic acid and (c) a recording sensitizer is further used, and whereby the resulting record images are at least 0.75 in PCS value at 800 nm.

Abstract: In a heat-sensitive recording material which comprises a substrate and a heat-sensitive recording layer thereon containing a diazonium salt and coupler compound, the heat-sensitive recording material characterized in that the coupler compound comprises at least one compound represented by the formula [I] below ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are each hydrogen atom, halogen atom, alkyl or alkoxyl; R.sub.9 is hydrogen atom or alkyl; X and Y are each hydrogen atom, --OR.sub.10 or --N(R.sub.11)(R.sub.12), R.sub.10, R.sub.11 and R.sub.12 being each hydrogen atom, alkyl, alicyclic group, aryl or aralkyl, these R.sub.10, R.sub.11 and R.sub.12 may have a substituent selected from among halogen atom, alkyl and alkoxy, R.sub.11 and R.sub.12 may link together to form a heteroring, or, one or both of R.sub.11 and R.sub.12 may form a heteroring together with an adjacent benzene ring; n is 0 or 1.

Abstract: In a heat-sensitive recording material comprising a colorless or pale-colored basic dye and an electron accepting reactant material which is reactive with the basic dye to form a color when contacted therewith, and comprising at least one of the specific phthalide derivatives as the basic dye, the heat-sensitive recording material characterized in that at least one compound selected from the group consisting of the specific fluorene derivatives and the specific p-phenylenediamine derivatives is further contained in the recording material.

Abstract: A new phthalide derivative useful as a colorless chromogenic material has the general formula: ##STR1## wherein R.sub.1 to R.sub.10, X.sub.1, X.sub.2, Y.sub.1, Y.sub.2, Z, a and b have the same meaning as defined hereinbefore.

Abstract: Disclosed is a heat-sensitive recording material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and comprising a colorless or pale-colored basic dye and a color developing material capable of forming a color when contacted with the dye, the heat-sensitive recording material being characterized in that the heat-sensitive record layer contains as the color developing material at least one multi-valent metal salt of an indole-2-carboxylic acid derivative represented by the formula ##STR1## wherein R.sub.1 through R.sub.6 are hydrogen or other substituent. The heat-sensitive recording material is resistant to plasticizer and diazo developer, and also is suitable for high-speed recording.

Abstract: A new phthalide derivative useful as a colorless chromogenic material has the following formula: ##STR1## wherein A and n have the same meaning as defined hereinbefore.

Abstract: A pressure sensitive manifold sheet characterized in that a chelate record material comprising an iron (III) compound and/or a vanadium compound, and an aromatic compound having at least one of hydroxyl group and mercapto group on the aromatic ring in combination therewith is used further in combination with an infrared absorbing organic compound.

Abstract: A stereophonic receiving circuit in which automatic switchover from the monaural receiving mode to the stereophonic receiving mode as the input signal strength increases is made more smoothly and effectively by boosting the gradient of a S-meter control voltage above a certain level of the received signal. The conventional S-meter voltage is applied to one input of a differential amplifier, the other input of which receives a reference voltage. The output of the differential amplifier is applied to one input of an analog OR gate, the other input of which receives the S-meter voltage directly. The output of the analog OR circuit, which is the greater of the two inputs to the circuit, is applied to the control inputs of an electronic volume control circuit, a high-cut controller, and a stereophonic demultiplexer circuit.

Abstract: A new phthalide derivative useful as a colorless chromogenic material has the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 have the same meaning as defined hereinbefore.

Abstract: An antenna switching circuit which selectively transmits, to a receiver, RF signals from a plurality of antennas including RF signals of different frequency bands such as the VHF band and the MF band using a single output terminal. To prevent a level drop of RF signals of one of the frequency bands due to a common use of the output terminal, a unidirectional switching element is added to a switching circuit network by which the selection of RF signals from the different antennas is performed.A branching circuit for separating RF signals of different frequency bands is provided with an attenuation operation using a variable impedance characteristic of a semiconductor switching element which is basically on-off operated for the switching between the RF signals of the different frequency bands.

Abstract: A new phthalide derivative useful as a colorless chromogenic material has the general formula: ##STR1## wherein R.sub.1 to R.sub.10, X.sub.1, X.sub.2, Y.sub.1, Y.sub.2, Z, a and b have the same meaning as defined hereinbefore.

Abstract: A record material utilizing the color forming reaction between a substantially colorless chromogenic material and an electron accepting reactant material is disclosed. The colorless chromogenic material used comprises a mixture of the first component consisting of at least one specified phthalide compound having two vinyl linkages and the second component of another kind of chromogenic material which is different from said first component. The first component of the chromogenic material is used in an amount of 5 to 80%, preferably 7 to 50%, by weight with respect to the amount of the second component and in such an amount that the reflectance at any wavelength within the range of 580 nm to 880 nm, preferably within the range of 500 to 880 nm of color images developed by said color forming reaction is less by at least 55% than that of said record material before color developing.

Abstract: A new fluoran derivative useful as a colorless chromogenic material has the following formula: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, X and Y have the same meaning as defined hereinbefore.