摘要:
A pasting method for pasting a non-insulation sheet 20 on a printed circuit board 10, for pasting the non-insulation sheet 20 for shielding electromagnetic waves upon a surface of the printed circuit board 10, which comprises a pattern land formed on an insulation board for soldering a part thereon and a solder resist layer covering a part on the pattern land by a solder resist, comprising the following steps of: a step of forming a ring-like insulation layer 30 for adhering an end face of the non-insulation sheet 20, upon the solder resist layer; and a step for adhering the end face of the non-insulation sheet 20 onto the insulation layer 30, wherein the insulation layer 30 is formed so that the end face of the non-insulation sheet 20 lies within a predetermined region of the insulation layer 30, and thereby providing the method for enabling to paste the non-insulation sheet onto the printed circuit board, during the manufacturing process of the printed circuit board, but without necessity of putting the insulation sheet between the non-insulation sheet and the printed circuit board.
摘要:
An optical disc apparatus includes a first electric power source portion to convert a first power source voltage into a predetermined voltage, to be supplied to a part of the optical disc apparatus. A second electric power source, to convert a second power source voltage into another predetermined voltage, is supplied to other parts of the optical disc apparatus. An electric power source observation portion observes voltages of the first electric power source portion and the second electric power source portion so as to release resetting of a system constituting the optical disc apparatus, when the voltages of the first electric power source portion and the second electric power source portion reach respective predetermined voltages.
摘要:
For providing a built-in type optical disc apparatus, to be installed in a part of an electronic equipment having plural kinds of electric power source portions within a housing thereof, enabling to protect from a malfunction or breakdown of parts thereof when power source is one-sided, thereby to achieve a desired operation with certainty, the optical disc apparatus comprises: a first electric power source portion, to convert a first power source voltage, which is supplied from an electric power source portion provided within the housing of the electronic equipment, into a predetermined voltage, to be supplied to a part of the respective portions, which build up said optical disc apparatus; and a second electric power source, to convert a second power source voltage, which is supplied from another electric power source portion provided within the housing of the electronic equipment, into another predetermined voltage, to be supplied to other part of the respective portions, which build up the optical disc apparatus, and further comprises an electric power source observation portion 312 to observe voltages of the first electric power source portion of the optical disc apparatus and the second electric power source portion of the optical disc apparatus, so as to release resetting of a system building up the optical disc apparatus, when the voltages of the first electric power source portion and the second electric power source portion reach to predetermined voltages, respectively.
摘要:
A recording and/or reproducing apparatus includes a plurality of devices in which a first device has a connecting unit connected with a host device to perform a data transfer with the host device, a second device shares a temporarily recording area with the first device to perform the data transfer between the first and second devices via the temporarily recording area, and the data transfer is performed by using the temporarily recording area shared with the first device and using the connecting unit of the first device when the second device performs the data transfer with the host device, in this way, a power consumption is reduced.
摘要:
A process for producing a maleic anhydride adduct of high molecular weight 1,2-polybutadiene by contacting with heat maleic anhydride with high molecular weight 1,2-polybutadiene in the absence of a radical initiator in a halogenated aromatic hydrocarbon solvent. The adduct obtained by this process has a high molecular weight of more than 10,000 and is quite free from gel. Said process enables the addition of maleic anhydride in any desired proportion.
摘要:
A photosensitive resin composition comprising (I) a copolymer containing (A) 10 to 95 mol % of a conjugated diolefinic hydrocarbon, (B) 5 to 90 mol % of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid and (C) 0 to 85 mol % of a monoolefinically unsaturated compound, (II) a photosensitizer and/or a photosensitive crosslinking agent, and, if necessary, (III) a photopolymerizable unsaturated monomer. Said copolymer may have been reacted with an inorganic alkali, an alkali salt or an amine compound in a proportion of 0.05 to 1.0 equivalent per equivalent of the carboxyl group of the .alpha.,.beta.-ethylenically unsaturated carboxylic acid in said copolymer. This photosensitive resin composition is excellent in storage stability, quick in photosetting upon exposure to actinic light rays including ultraviolet rays, that is, high in sensitivity, capable of development with water or a dilute aqueous alkaline solution and possesses satisfactory rubber elasticity, and a printing plate formed from the composition is excellent in water resistance though the composition is developable with an aqueous developing solution, so that the composition can be used for a flexographic printing plate, to which an aqueous flexographic printing ink can be applied. Said composition can also be used for a pohote-resist which is high in sensitivity, developable with water or a dilute alkaline solution and excellent in resolving power.
摘要:
A recording and/or reproducing apparatus includes a plurality of devices in which a first device has a connecting unit connected with a host device to perform a data transfer with the host device, a second device shares a temporarily recording area with the first device to perform the data transfer between the first and second devices via the temporarily recording area, and the data transfer is performed by using the temporarily recording area shared with the first device and using the connecting unit of the first device when the second device performs the data transfer with the host device, in this way, a power consumption is reduced.
摘要:
A photosensitive composition comprising (1) a maleic anhydride adduct of 1,2-polybutadiene having a molecular weight of 10,000 or higher, (2) at least one photosensitizer and/or at least one photosensitive crosslinking agent, and, if necessary, (3) at least one acrylic monomer. This composition can be developed with water or a polar solvent such as an alcohol, and its layer formed on a support provides a printing plate. When the acrylic monomer is contained, the composition is suitable for use in flexographic printing.