摘要:
A low dielectric constant composition with a dielectric constant of 4 or less is disclosed. The composition comprises a matrix resin and crosslinked resin particles having an average particle diameter in the range from 0.03 to 10 .mu.m, the crosslinked resin particles being prepared by the polymerization of 1-100 wt % of cross-linking monomers and 0-99 wt % of non-cross-linking monomers, having a dielectric constant of 3 or less, and having a 50 ppm or less average concentration of metal ions. The composition exhibits superior insulation properties and capable of producing an insulating material and sealing material with a low dielectric constant and low dielectric loss tangent (tan .delta.). An insulating material and a sealing material comprising this low dielectric composition and a circuit board provided with the insulating material or sealing material are also disclosed.
摘要:
An image forming apparatus includes a movable image bearing member; an electrostatic image forming device for forming an electrostatic image on the image bearing member, the electrostatic image forming device including a charging member, contactable to the image bearing member, for charging the image bearing member; developing device for developing the electrostatic image with toner to form a toner image on the image bearing member; a transfer device for transferring the toner image onto the transfer material from the image bearing member, wherein the developing device is capable of cleaning the image bearing member to remove residual toner from the image bearing member, without provision of cleaning device for removing the residual toner from the image bearing member at a position upstream of the charging member and downstream of the transfer device with respect to a moving direction of the image bearing member; and a charge application device, provided upstream of the charging member and downstream of the transfer device with respect to the movement direction, for charging the residual toner on the image bearing member to a polarity opposite from charging polarity of the charging member.
摘要:
A process for producing modified cross-linked polymer particles which comprises polymerizing 0.01 to 900 parts by weight of (B) a monomer component containing 50% by weight or more of at least one member selected from the group consisting of aromatic monoalkenyl compounds, acrylic acid esters, methacrylic acid esters, fluoroalkyl acrylates, fluoroalkyl methacrylates, unsaturated carboxylic acids, conjugated diene compounds, vinyl esters and organosilane compounds in the presence of 100 parts by weight of (A) cross-linked polymer particles obtained by polymerizing a monomer mixture comprising 50% by weight or more of at least one cross-linking monomer selected from the group consisting of divinylbenzene, ethylene glycol dimethacrylate and trimethylolpropane trimethacrylate.
摘要:
In a method of developing an electrostatic latent image formed on an image bearing member, wherein a developer carrying member carrying a layer of a developer is faced to the image bearing member and is supplied with an oscillating bias voltage to form an oscillating electric field in a developing zone, the improvement residing in: that a maximum Vu1max of a potential difference Vu1 between an image portion potential of the latent image and a potential of the developer carrying member in a transfer phase of the oscillating electric field, is larger than a maximum Vr1max of a potential difference Vr1 therebetween in a back-transfer phase thereof; that a maximum Vu2max of a potential difference Vu2 between a non-image portion potential of the latent image and a potential of the developer carrying member in the transfer phase of the oscillating electric field, is not less than a maximum Vr2max of a potential Vr2 therebetween in the back-transfer phase thereof; that integration Iu2, with time, of the potential difference Vu2 is not more than integration Ir2, with time, of the potential difference Vr2.
摘要:
A package for housing semiconductor elements including an insulating base which consists of electrical insulation material, and has a mounting portion that mounts semiconductor elements on the upper surface as well as a plurality of depressions on either of the upper surface and the lower surface thereof, a plurality of metallized wiring layers led away from the periphery of the mounting portion and extending to one end surface of the depressions, a plurality of connection pads for electrically connecting the metallized wiring layers formed on the end surface of the depressions of the insulating base and terminals which are soldered to the connection pads, wherein the terminals are accurately attached by solder to designated positions on the connection pads and securely and strongly joined to designated wire conductors of external electronic circuit boards to achieve reliable electrical connections of semiconductor integrated circuit elements housed inside the package to external electronic circuit boards.
摘要:
A novel process for the preparation of a chlorinated polyolefin having excellent low temperature characteristics and brightness is provided which comprises allowing a polyolefin dissolved or suspended in a solvent to undergo chlorination reaction with chlorine gas or chlorinated sulfuryl in the presence of a radical initiator as a catalyst, characterized in that as said solvent there is used 1,1,2-trichloroethane and the temperature is controlled to 90.degree. C. or lower at the process for removing hydrogen chloride and/or sulfur dioxide by-produced during the reaction from the reaction system. A further process for the preparation of a chlorosulfonated polyolefin having excellent low temperature characteristics and brightness is provided which comprises allowing a polyolefin dissolved or suspended in a solvent to undergo chlorosulfonation reaction with chlorine and sulfur dioxide, chlorine and sulfuryl chloride, sulfuryl chloride alone, chlorine, sulfur dioxide and sulfuryl chloride or sulfuryl chloride and sulfur dioxide in the presence of a radical initiator as a catalyst, characterized in that as said solvent there is used 1,1,2-trichloroethane and the temperature is controlled to 90.degree. C. or lower at the process for removing hydrogen chloride and/or sulfur dioxide by-produced during the reaction from the reaction system.
摘要:
The present invention relates to a vinyl chloride-based copolymer latex comprising 0.20 to 10.0 parts by weight of an organic compound having a sulfonate or sulfuric acid ester salt and from 0.05 to 3.0 parts by weight of a higher fatty acid salt, per 100 parts by weight of a vinyl chloride-vinyl carboxylate ester copolymer or 100 parts by weight of a vinyl chloride-unsaturated carboxylic acid ester copolymer, wherein the vinyl chloride-based copolymer latex has pH of from 3 to 8; and a production method thereof.
摘要:
One embodiment of a semiconductor device according to the present invention includes a substrate, a base compound semiconductor layer layered on the substrate to form a base, a channel defining compound semiconductor layer layered on the base compound semiconductor layer to define a channel, and an impact ionization control layer that is layered within a layering range of the base compound semiconductor layer and controls the location of impact ionization, wherein the base compound semiconductor layer is formed of a first compound semiconductor, the channel defining compound semiconductor layer is formed of a second compound semiconductor, and the impact ionization control layer is formed of a third compound semiconductor that has a smaller band gap than the first compound semiconductor.
摘要:
A light-emitting device comprising a pair of baseplates respectively having surfaces facing each other, each surface having an electrode formed thereon, and a light-emitting layer sandwiched between the two baseplates. The light-emitting layer contains an ionic liquid and a light-emitting material dissolved in the ionic liquid. Since the light-emitting device is made without using any organic solvent, it is highly safe, does not deteriorate in emission characteristics, and requires a decreased number of constituent materials.
摘要:
There are provided a metal material for electrode formation, which can form an electrode provided in an organic function element without adopting vapor deposition, can easily realize an increase in size, can reduce production cost, and does not cause any disconnection of the electrode upon exposure to flexure and, thus, is highly reliable, and, at the same time, has a high level of electron injection function, and an organic function element using the metal material. The metal material is a Ga(gallium)-base alloy which is in a paste state at a temperature of the melting point of the Ga-base alloy or above, the Ga-base alloy comprising at least a Ga-base liquid metal in a liquid state at room temperature and an alkali metal or an alkaline earth metal and having an electron injection function.