摘要:
A piezoelectric acoustic transducer achieves both space-saving and high sound quality without increasing the number of parts. In order to achieve this, the transducer includes a piezoelectric element constructed of a piezoelectric material interposed between two surface electrodes and a diaphragm of which at least one principal surface is provided with a print wiring and at least one principal surface is bonded to the piezoelectric element. The diaphragm includes a frame section, a vibrating section which is bonded with the piezoelectric element and which vibrates, and at least one supporting section which connects the frame section and the vibrating section and which supports the vibrating section. Either the frame section or the at least one supporting section includes at least one electrical resistance which is integrally formed to the print wiring and which constructs, in combination with the piezoelectric element, a series-RC circuit.
摘要:
A piezoelectric speaker is a piezoelectric speaker which radiates acoustic waves by vibrating according to an applied voltage, including (i) a substrate which includes a first region having first bending stiffness against bending of a plane perpendicular to a vibration direction and a second region having second bending stiffness against bending of the perpendicular plane, the second bending stiffness being different from the first bending stiffness, (ii) a first piezoelectric element which is mounted on the first region and to which a voltage of a first frequency band is applied, and (iii) a second piezoelectric element which is mounted on the second region and to which a voltage of a second frequency band different from the first frequency band is applied.
摘要:
The present invention relates to a head slider used for a magnetic storage device. The head slider includes a light emission device, and an optical absorption device disposed at a position capable of absorbing energy of light emitted by the light emission device.
摘要:
A photosensitive composition containing: (A) a sensitizing dye; (B) a photopolymerization initiator; (c) a polymerizable compound having an ethylenically unsaturated bond; and (D) a polymer binder, wherein the photopolymerization initiator exhibits a reaction rate constant with a semiquinone radical anion in the range of 2.0×102 to 1.0×108 (mol−1·l·s−1).
摘要:
Disclosed is a light sensitive planographic printing plate material comprising a support and provided thereon, a light sensitive layer containing a polymerization initiator, a polymerizable ethylenically unsaturated compound, a polymeric binder, and a sensitizing dye, wherein the sensitizing dye is represented by formula (1),
摘要:
Disclosed is a planographic printing plate material comprising a support and provided thereon, a photopolymerizable light sensitive layer and a protective layer in the order, wherein the protective layer contains a polyvinyl alcohol derivative A having a saponification degree of 90 to 100 mol % and a solubility of 0.1 to 10 g per liter of 50° C. water, and wherein a viscosity at 20° C. of an aqueous solution containing 4% by weight of the polyvinyl alcohol derivative, measured according to JIS K6726, is from 4.5 to 200 mPa·s.
摘要:
Disclosed are a planographic printing plate material and a planographic printing plate preparing process, the planographic printing plate material comprising a support and provided thereon, an image formation layer containing a colorant (a) having an absorption band in a wavelength region of from 700 to 1200 nm, a polymerization initiator (b) and a polymerizable ethylenically unsaturated compound (c), the image formation layer being an outermost layer, wherein the polymerization initiator (c) is a compound represented by the following formula (1), R1—C(X)2—(C═O)—(Y)n—R2 Formula (1)
摘要:
Disclosed are a light sensitive composition containing A) an addition polymerizable ethylenically double bond-containing monomer, B) a photopolymerization initiator, and C) a polymer binder, wherein the addition polymerizable ethylenically double bond-containing monomer is a reaction product of a tertiary amine having two or more hydroxyl groups in the molecule, a diisocyanate having an aromatic ring in the molecule and a compound having a hydroxyl group and an addition polymerizable ethylenically double bond in the molecule, and a light sensitive planographic printing plate precursor comprising the light sensitive composition.
摘要:
A planographic printing plate manufacturing method is disclosed which comprises the step of developing a presensitized planographic printing plate with a developer with a pH of from 11.5 to less than 12.5 which does not substantially contain an organic solvent, wherein the presensitized planographic printing plate comprises a support having a roughened hydrophilic surface with a center line average surface roughness Ra of from 0.5 to 0.8 &mgr;m, and provided thereon, a photopolymerizable light sensitive layer and an oxygen shielding layer in that order, the photopolymerizable light sensitive layer containing A) an addition polymerizable monomer having an ethylenic double bond, B) a photopolymerization initiator, C) a sensitizing dye, and D) a polymer binder, and the oxygen shielding layer containing E) polyvinyl alcohol and F) polyvinyl pyrrolidone.
摘要:
Disclosed is a light-sensitive composition which comprises(A) a diazo resin and(B) an alkali-soluble and swellable polymer compound, said polymer compound being a vinyl copolymer containing, as a constitutional unit, 0.1 to 10 mole % of a structure derived from an ester of acrylic acid or methacrylic acid having an alkyl group with 8 or more carbon atoms.