摘要:
It is an object of the present invention to provide a high frequency-capable printed wiring board material reduced in the dielectric loss tangent, weight, thickness and cost without compromising the workability, and provide electronic components using the same. The present invention provides a prepreg obtained by using a quartz glass cloth composed of low-density quartz glass fibers as a base material and impregnating the cloth with a thermosetting resin composition having a low dielectric loss tangent, and provides electronic components using a cured product of the prepreg as an insulating layer.
摘要:
A prepreg comprising composite woven cloth or non-woven cloth composed of glass fiber and polyolefin fiber that are a main part of the cloth and a thermosetting resin composition that gives a cured product having a low thermal expansion coefficient, wherein the thermal expansion coefficient of the cured resin composition at 50 to 100° C. is 50 ppm/° C. or less, is disclosed. A printed circuit board, multi layered circuit board, and electronic part are disclosed.
摘要:
A prepreg is thermosettable. The prepreg comprises a thermosetting resin composition A, a cured resin of the thermosetting resin composition exhibiting a dielectric tangent of 0.005 or less under 1 Hz or more, and a substrate B into which the resin A is impregnated, wherein the substrate B comprises polyolefin fiber C and a fiber D, which has a tensile strength higher than that of the polyolefin fiber C and a thermal expansion coefficient smaller than that of the fiber C, and wherein the substrate is a woven cloth and has a solubility rate into a hydrocarbon organic solvent is less than 5 wt %.
摘要:
A prepreg comprising composite woven cloth or non-woven cloth composed of glass fiber and polyolefin fiber that are a main part of the cloth and a thermosetting resin composition that gives a cured product having a low thermal expansion coefficient, wherein the thermal expansion coefficient of the cured resin composition at 50 to 100 ° C. is 50 ppm/° C. or less. A printed circuit board, multi layered circuit board, and electronic part are disclosed.
摘要:
It is an objective of this invention to obtain: a composition superior in processability, dielectric properties, heat resistance, and adhesiveness by controlling phase separation of a 1,2-polybutadiene resin composition without deterioration of dielectric properties exhibited in high-frequency regions; and a multilayer printed wiring board using the same.This invention relates to a polybutadiene resin composition, comprising: a crosslinking component (A) comprising repeating units represented by the following formula (1) and having a number average molecular weight of 1000 to 20000; a radical polymerization initiator (B), the one-minute half-life temperature of which is 80° C. to 140° C.; and a radical polymerization initiator (C), the one-minute half-life temperature of which is 170° C. to 230° C.; wherein 3 to 10 parts by weight of the component (B) and 5 to 15 parts by weight of the component (C) are contained relative to 100 parts by weight of the component (A). The invention also relates to a prepreg, a laminate, and a printed wiring board, which are produced using the same.
摘要:
It is an object of the present invention to provide a high frequency-capable printed wiring board material reduced in the dielectric loss tangent, weight, thickness and cost without compromising the workability, and provide electronic components using the same. The present invention provides a prepreg obtained by using a quartz glass cloth composed of low-density quartz glass fibers as a base material and impregnating the cloth with a thermosetting resin composition having a low dielectric loss tangent, and provides electronic components using a cured product of the prepreg as an insulating layer.
摘要:
It is an objective of this invention to obtain: a composition superior in processability, dielectric properties, heat resistance, and adhesiveness by controlling phase separation of a 1,2-polybutadiene resin composition without deterioration of dielectric properties exhibited in high-frequency regions; and a multilayer printed wiring board using the same. This invention relates to a polybutadiene resin composition, comprising: a crosslinking component (A) comprising repeating units represented by the following formula (1) and having a number average molecular weight of 1000 to 20000; a radical polymerization initiator (B), the one-minute half-life temperature of which is 80° C. to 140° C.; and a radical polymerization initiator (C), the one-minute half-life temperature of which is 170° C. to 230° C.; wherein 3 to 10 parts by weight of the component (B) and 5 to 15 parts by weight of the component (C) are contained relative to 100 parts by weight of the component (A). The invention also relates to a prepreg, a laminate, and a printed wiring board, which are produced using the same.
摘要:
An acetyl-CoA-producing microorganism, which is capable of efficiently synthesizing acetyl-CoA using carbon dioxide, and a substance production method using the same are provided. An acetyl-CoA-producing microorganism including an acetyl-CoA production cycle obtained by imparting at least one type of enzymatic activity selected from the group consisting of malate thiokinase, malyl-CoA lyase, glyoxylate carboligase, 2-hydroxy-3-oxopropionate reductase, and hydroxypyruvate reductase, to a microorganism.
摘要:
Blocking a view of a whiteboard by a position of an attendee writing thereon is prevented, and writing records made by all attendees are stored to use the writing records including a course of the written records later. Each terminal of the attendees has a touch-panel-equipped terminal can divide any input line drawing on the terminal into line segment data, successively transmit the line segment data to the controller, and display line drawing information on the display of the touch-panel-equipped terminal. A liquid crystal projector having a controller that can be embedded therein or connected thereto is provided, the controller can sequentially record line drawing information transmitted from each touch-panel-equipped terminal in a data base, add the line drawing information to a video image memory of the whiteboard, and project the video image memory contents onto a wall surface while transmitting information of the data base to each touch-panel-equipped terminal.
摘要:
A nuclear reactor vessel structure includes an inner peripheral tube-shaped steel plate, an outer peripheral tube-shaped steel plate, and an intermediate tube-shaped steel plate disposed between the inner and outer peripheral tube-shaped steel plates, and is configured to support a nuclear reactor vessel on the inner peripheral side of a tube-shaped structure with concrete placed between the steel plates. The nuclear reactor vessel structure includes a support having a tube-shaped plate disposed on the inner peripheral side of the intermediate tube-shaped steel plate, and an annular plate which protrudes to the inner peripheral side of the tube-shaped plate and to which a connection section is affixed. The support is affixed to the concrete, which is placed between the inner peripheral and the intermediate tube-shaped steel plates, by first bar members, and the support is also affixed to the inner peripheral tube-shaped steel plate by second bar members.