摘要:
A cast resin for optical use is obtained by polymerizing a diallylphthalate component represented by the formula: ##STR1## wherein --R.sub.1 stands for a hydrogen atom or a methyl group, --OR.sub.2 for a dihydric alcohol residue having 1-5 carbon atoms, and m for an integer of 0-20, with an alkyleneglycol bis-allylcarbonate component represented by the formula: ##STR2## wherein --R.sub.4 stands for a hydrogen atom or a methyl group, --OR.sub.3 for a dihydric alcohol residue having 1-10 carbon atoms, and n for an integer of 1-10. In addition to the above components, there may be added a vinyl compound.
摘要:
A cast resin for optical use is obtained by polymerizing 40 to 89 wt % of a diallyl phthalate component represented by the formula (I) ##STR1## wherein --R.sub.1 is a hydrogen atom or a methyl group, --OR.sub.2 is a dihydric alcohol residue having 1 to 5 carbon atoms and m is an integer of from 0 to 20, 10 to 59 wt % of an alkylene glycol bis-allyl carbonate component represented by the formula (II) ##STR2## wherein --R.sub.4 is a hydrogen atom or a methyl group, --OR.sub.3 is a dihydric alcohol residue having 1 to 10 carbon atoms and n is an integer of from 0 to 10, and 1 to 30 wt % of a vinyl compound represented by the formula (III) ##STR3## wherein --R.sub.5 and --R.sub.6 stand for a hydrogen atom or a group ##STR4## wherein X and Y each indicate a hydrogen atom or a halogen atom other than a fluorine atom.
摘要:
Provided is an alkaline developable photosensitive resin composition which does not contain crude particles, has excellent storage stability, can avoid the deterioration of working environments, and contains few substances toxic to human bodies. The alkaline developable photosensitive resin composition is characterized by comprising (A) a resin containing a carboxyl group, (B) a photopolymerization initiator, (C) a compound having at least two ethylenically unsaturated groups per molecule, and (D) a dibasic acid ester.
摘要:
In a hot press molding method for press-molding a heated material and cooling the material while holding the material in a mold, during press molding of the material, shape changes including a portion that curves with respect to a longitudinal direction of the material are molded at longitudinal opposite end portions of the material and resistance to thermal contraction force of the material in the longitudinal direction during cooling is imparted. In one embodiment of the present invention, the shape changes molded on the material during the press molding are minute protrusions provided on surfaces of the longitudinal opposite end portions of the material. The invention makes it possible to suppress thermal contraction of the material during cooling in hot press molding to thereby prevent defects associated therewith.
摘要:
A heat sink including a base section, connection fins, and parallel fins. The base section includes: a first base plate configured to be mounted with a heat generating component on its outer surface; a second base plate disposed to face the first base plate in a parallel manner, configured to be mounted with a heat generating component on its outer surface; and a third base plate disposed perpendicular to the first base plate and the second base plate, which secures the first base plate and the second base plate along a junction line. The base section includes first and second regions arranged in the direction of the junction line. The connection fins are disposed on the first region to connect inner surfaces of the first and second base plates and to be parallel to the third base plate, and the parallel fins are disposed on the second region from an inner surface of the third base plate to be parallel to the first base plate.
摘要:
A gas sensor including a gas sensor element having a first measurement chamber (16); a first pumping cell (11); a second measurement chamber (18) into which a gas to be measured having a controlled oxygen partial pressure is introduced; and a second pumping cell (13) having a second inner pump electrode (13b) and a second counterpart electrode (13c) pump electrode configured to detect a specific gas component. The second inner pump electrode is made of a material that contains, as a principal ingredient, two kinds of Pt particles having different particle sizes and whose particle size ratio measured by a sedimentation particle-size distribution ranges from 1.75 to 14.2. A mixing ratio between large Pt particles and small Pt particles has a mass ratio of 10/90 to 50/50. A 10 kHz-1 Hz resistance value across the second pumping cell at 600° C. is 150Ω or less.
摘要:
There are provided a method and an apparatus which form silicon dots having substantially uniform particle diameters and exhibiting a substantially uniform density distribution directly on a substrate at a low temperature. A hydrogen gas (or a hydrogen gas and a silane-containing gas) is supplied into a vacuum chamber (1) provided with a silicon sputter target (e.g., target 30), or the hydrogen gas and the silane-containing gas are supplied into the chamber (1) without arranging the silicon sputter target therein, a high-frequency power is applied to the gas(es) so that plasma is generated such that a ratio (Si(288 nm)/Hβ) between an emission intensity Si(288 nm) of silicon atoms at a wavelength of 288 nm and an emission intensity Hβ of hydrogen atoms at a wavelength of 484 nm in plasma emission is 10.0 or lower, and preferably 3.0 or lower, or 0.5 or lower, and silicon dots (SiD) having particle diameters of 20 nm or lower, or 10 nm or lower are formed directly on the substrate (S) at a low temperature of 500 deg. C. or lower in the plasma (and with chemical sputtering if a silicon sputter target is present).
摘要:
Plasma producing method and apparatus wherein a plurality of high-frequency antennas are arranged in a plasma producing chamber, and a high-frequency power supplied from a high-frequency power supply device (including a power source, a phase controller and the like) is applied to a gas in the chamber from the antennas to produce inductively coupled plasma. At least some of the plurality of high-frequency antennas are arranged in a fashion of such parallel arrangement that the antennas successively neighbor to each other and each of the antennas is opposed to the neighboring antenna. The high-frequency power supply device controls a phase of a high-frequency voltage applied to each antenna, and thereby controls an electron temperature of the inductively coupled plasma.
摘要:
A process for producing a fine silver particle colloidal dispersion which can simply form conductive silver layers and antimicrobial coatings by screen printing or the like. The process is characterized by having a reaction step of allowing an aqueous silver nitrate solution to react with a mixed solution of an aqueous iron(II) sulfate solution and an aqueous sodium citrate solution to form an agglomerate of fine silver particles, a filtration step of filtering the resultant agglomerate of fine silver particles to obtain a cake of the agglomerate of fine silver particles, a dispersion step of adding pure water to the cake to obtain a first fine silver particle colloidal dispersion of a water system in which dispersion the fine silver particles have been dispersed in the pure water, and a concentration and washing step of concentrating and washing the first fine silver particle colloidal dispersion of a water system.
摘要:
A separator unit inserted into a fuel cell having an electrolyte layer interposed between a fuel electrode and an oxygen electrode is provided with a plate like separator that separates fuel gas supplied to the fuel electrode from oxidizing gas supplied to the oxygen electrode, and a mesh like collector having an opening that forms one of a passage through which the fuel gas flows and a passage through which the oxidizing gas flows. The collector is provided to at least one side of the separator base in abutment against one of the fuel electrode and the oxygen electrode. The separator base has a coolant passage formed therein, through which a coolant is allowed to flow, and an electrode abutment portion of the collector, which abuts against one of the fuel electrode and the oxygen electrode, has an aperture ratio higher than those of other portions of the collector.