摘要:
The present invention provides a novel surface-treated molybdenum compound powder and provides a prepreg, a laminate, a metal foil laminate, a printed wiring board, and the like that have a low thermal expansion coefficient in the planar direction, and excellent drillability, heat resistance, and flame retardancy. The surface-treated molybdenum compound powder of the present invention has at least part of the surface thereof coated with an inorganic oxide, and this is used as a filler.
摘要:
It is an object of the present invention to provide, without using a halogenated compound or a phosphorus compound, a resin composition for printed wiring boards, a prepreg, a laminate, and a metal foil-clad laminate, each of which has high-degree flame retardance, has a low water absorption ratio and a high glass transition temperature, and has a high elastic modulus at high temperature. A resin composition according to the present invention includes a specific maleimide compound (A); a cyanate ester compound (B); a non-halogen epoxy resin (C); and an inorganic filler (D).
摘要:
There are provided a resin composition for printed wiring boards that has a low coefficient of thermal expansion in a plane direction, has excellent heat resistance and drilling workability, and, at the same time, can retain a high level of flame retardance, a prepreg prepared using the resin composition, and a laminated sheet and a metal foil-laminated sheet prepared using the prepreg. The resin composition comprises (A) an inorganic filler that is a mixture composed of a hydromagnesite represented by formula (1): xMgCO3.yMg(OH)2.zH2O (1) wherein x:y:z is 4:1:4, 4:1:5, 4:1:6, 4:1:7, 3:1:3, or 3:1:4 and huntite; (B) an epoxy resin; and (C) a curing agent.
摘要:
Provided is an electromagnetic wave absorber, including a base material and a porous carbon material containing, as a raw material, a plant-based material having a silicon content of 5% by mass or more, in which the porous carbon material has a specific surface area value as measured by the nitrogen BET method of 400 m2/g or more, a silicon content of 1% by mass or less, a pore volume as measured by the BJH method of 0.2 cm3/g or more, and a pore volume as measured by the MP method of 0.2 cm3/g or more, or a total pore volume of pores each having a diameter in the range from 1×10−9 m to 5×10−7 m as measured by the Non Localized Density Functional Theory of 1.0 cm3/g or more.
摘要:
This invention relates to a prepreg having a low thermal expansion coefficient in plane direction and a high rigidity, and more particularly to a prepreg comprising a glass cloth (A), and a resin composition including a cyanate ester resin (B), a non-halogen based epoxy resin (C) and an inorganic filler (D), wherein the glass cloth (A) is characterized that when the weight per 1 m2 is W (g/m2), the thickness is t (μm), the number of warp threads per inch is X (thread/inch), and the number of weft threads per inch is Y (thread/inch), the total of X and Y is 150 to 240, t is 17 to 35, and the value of W/t as the apparent density is 1.1 to 1.5, and that the volume fraction of the glass cloth (A) in the prepreg is 32% to 42%.
摘要翻译:本发明涉及一种在平面方向上具有低热膨胀系数和高刚性的预浸料,更具体地涉及包含玻璃布(A)的预浸料,以及包含氰酸酯树脂(B),非水性树脂 卤素系环氧树脂(C)和无机填料(D),其中,玻璃布(A)的特征在于,当1m 2的重量为W(g / m 2)时,厚度为t(μm) 每英寸经纱为X(螺纹/英寸),每英寸纬纱数为Y(螺纹/英寸),X和Y的总和为150〜240,t为17〜35,W / t,表观密度为1.1〜1.5,玻璃布(A)在预浸料中的体积分数为32〜42%。
摘要:
A method for producing a magnetic particle forming a magnetic material for absorbing electromagnetic waves comprises the steps of mixing an organometallic complex or a metal salt with a chain polymer and dissolving the mixture in a solvent (step S1); raising the temperature of the mixture to reaction temperature (step S2), carrying out a reaction at the reaction temperature (step S3); and forming the magnetic particle having a structure that the periphery of each fine particle formed from the organometallic complex or the metal salt is surrounded by the chain polymer and recovering the formed magnetic particle after the reaction (step S4). The magnetic particle has a nanogranular structure to become a magnetic material for absorbing electromagnetic waves. Such a magnetic particle is produced by a wet reaction. Thus, a larger amount of magnetic particle can be produced by one reaction.
摘要:
A prepreg, for printed wiring boards, comprising a flame resistant resin composition containing a specific cyanate ester resin, a nonhalogen epoxy resin, boehmite which is hardly soluble in acids or alkalis and a silicone powder which is a flame retardant assistant, and a base material, which prepreg retains high-degree flame resistance without a halogen compound and has excellent resistance to chemical, high glass transition temperature, excellent soldering heat resistance and excellent heat resistance after moisture absorption, and a laminate or metal-foil-clad laminate obtained by curing the above prepreg.
摘要:
An electromagnetic-wave suppressing material is provided. The electromagnetic-wave suppressing material includes an ionic liquid and nanometer-order particles mixed with the ionic liquid, where 10 wt % or more of the nanometer-order particles is mixed with respect to 100 wt % of the ionic liquid.
摘要:
A memory device is proposed which enables to guarantee the operation of MRAM elements being magnetically shielded against a large external magnetic fields without being affected by an internal leakage magnetic field. The MRAM elements 30 which are shielded by magnetic shield layers 33, 34 are placed at an intermediate region 41 avoiding an edge region 43 and a center region 42 of the magnetic shield layers 33, 34 so that the MRAM element is secured to operate normally without being affected by the internal leakage magnetic field avoiding the edge region 43 where the magnetic shield effect is reduced by the exterior magnetic field, and avoiding the central region 42 where the internal leakage magnetic field is large
摘要:
In a case where a CF film is used as an interlayer dielectric file for a semiconductor device, when a wiring of tungsten is formed, the CF film is heated to a temperature of, e g., about 400 to 450° C. At this time, F containing gases are emitted from the CF film, so that there are various disadvantages due to the corrosion of the wiring and the decrease of film thickness. In order to prevent this, it is required to enhance thermostability. A compound gas of C and F, e.g., C4F8 gas, a hydrocarbon gas, e.g., C2H4 gas, and CO gas are used as thin film deposition gases. These gases are activated to deposit a CF film on a semiconductor wafer 10 at a process temperature of 400° C. using active species thereof. Since the number of diamond-like bonds are greater than the number of graphite-like bonds by the addition of CO gas, the bonds are strengthened and difficult to be cut even at a high temperature, so that thermostability is enhanced.
摘要翻译:在将CF膜用作半导体器件的层间电介质文件的情况下,当形成钨的布线时,将CF膜加热至例如约400〜450℃的温度。在此 时间,从CF膜发射含F气体,由于布线的腐蚀和膜厚度的降低,存在各种缺点。 为了防止这种情况,需要提高热稳定性。使用C和F的复合气体,例如C 4 F 8气体,烃气体例如C 2 H 4气体和CO气体作为薄膜沉积气体。 这些气体被激活,以使其活性物质在400℃的处理温度下在半导体晶片10上沉积CF膜。 由于通过添加CO气体,类金刚石键的数量大于石墨状键的数量,所以即使在高温下也会使键强化,难以切断,从而提高热稳定性。