摘要:
As the semiconductor chip is large-sized, highly integrated and speeded up, it becomes difficult to pack the semiconductor chip together with leads in a package. In view of this difficulty, there has been adopted the package structure called the “Lead-On-Chip” or “Chip-On-Lead” structure in which the semiconductor and the leads are stacked and packed. In the package of this structure, according to the present invention, the gap between the leading end portions of the inner leads and the semiconductor chip is made wider than that between the inner lead portions except the leading end portions and the semiconductor chip thereby to reduce the stray capacity, to improve the signal transmission rate and to reduce the electrical noises.
摘要:
As the semiconductor chip is large-sized, highly integrated and speeded up, it becomes difficult to pack the semiconductor chip together with leads in a package. In view of this difficulty, there has been adopted the package structure called the “Lead-On-Chip” or “Chip-On-Lead” structure in which the semiconductor and the leads are stacked and packed. In the package of this structure, according to the present invention, the gap between the leading end portions of the inner leads and the semiconductor chip is made wider than that between the inner lead portions except the leading end portions and the semiconductor chip thereby to reduce the stray capacity, to improve the signal transmission rate and to reduce the electrical noises.
摘要:
As the semiconductor chip is large-sized, highly integrated and speeded up, it becomes difficult to pack the semiconductor chip together with leads in a package. In view of this difficulty, there has been adopted the package structure called the "Lead-On-Chip" or "Chip-On-Lead" structure in which the semiconductor and the leads are stacked and packed. In the package of this structure, according to the present invention, the gap between the leading end portions of the inner leads and the semiconductor chip is made wider than that between the inner lead portions except the leading end portions and the semiconductor chip thereby to reduce the stray capacity, to improve the signal transmission rate and to reduce the electrical noises.
摘要:
A photosensitive element for electrophotography has an electrically conductive substrate and a layer structure thereon comprising a charge generating substance and a charge transport substance. An improved charge transport substance is a derivative of triphenylamine in which at least 80% of the electrons in the highest occupied molecular orbital are located on the triphenylamine skeleton. Examples of such compounds have the following formula: ##STR1## wherein X is a an optionally substituted heterocyclic radical containing at least one ring nitrogen, Q is a single bond or --C.dbd.C--, and Z.sub.1, Z.sub.2 and Z.sub.3 are H, lower alkyl or alkoxy, aryl, NO.sub.2, CF.sub.3, --N(R').sub.2, --S--C.sub.6 H.sub.5 or --S(R').sub.2.
摘要:
Disclosed are an electrophotographic plate comprising a photoconductive layer containing an organic photoconductive substance on an electroconductive support, characterized in that said photoconductive layer has a film containing as the organic photoconductive substance a metal naphthalocyanine derivative represented by the formula (I): ##STR1## wherein M represents germanium or tin; L and L' each independently represent a halogen, a hydroxyl group, an alkyl group, an alkoxy group or a siloxy group of the formula R.sub.1 R.sub.2 R.sub.3 SiO-- (wherein R.sub.1, R.sub.2 and R.sub.3 each independently represent a hydrogen atom, an alkyl group, an alkoxy group or an aryl group),a metal naphthalocyanine derivative defined above and a process for producing the same.
摘要:
The humidity-sensitive element of this invention is composed of an insulating substrate (1), a pair of electrodes (2, 3) mounted thereon, and a humidity-sensitive material (8) covering the electrodes. The humidity-sensitive material (8) has a property to change its electric resistance depending on the moisture content in the atmosphere and is formed from fine particles each having a hydrophobic core and a hydrophilic group-containing surface layer covering the core. This humidity-sensitive element exhibits a nearly linear relationship between logarithum of electric resistance and relative humidity and small hysteresis, permitting a precise measurement of relative humidity. Insulating substrate (1) and electrodes (2,3) are preferred to form from an insulating layer of silicon semiconductor and conductive monosilicon formed on it, respectively. This permits size reduction of humidity-sensitive elements or devices.
摘要:
In a dynamoelectric machine having a stator assembly of coil windings and a core, a heat-dissipating, electro-insulative housing encapsulates the coil windings and the core. The housing is made of a cured molded article or material formed of a resin-filler composition which comprises a liquid unsaturated polyester resin, a finely divided calcium carbonate powder, an inorganic mineral particulate having a particle size larger than that of the calcium carbonate powder, and a chopped glass fiber, wherein the ratio by weight of the calcium carbonate to the mineral particulate is 0.3 to 4, the ratio of the weight of glass fiber to the total weight of the composition is 0.05 to 0.25, the ratio of the weight of the polyester resin to the total weight of the composition is 0.1 to 0.4 and the weight ratio of the calcium carbonate powder, the mineral particulate and the glass fiber to the total weight of the composition is 0.6 to 0.9.The disclosure is also concerned with a dynamoelectric machine having a housing made of a cured article of a composition containing a certain amount of clay powder as a separation inhibitor.
摘要:
A metal naphthalocyanine derivative and process for producing said derivative which is represented by the following formula (I): ##STR1## wherein M represents germanium or tin; L and L' each independently represent a halogen, a hydroxyl group, an alkyl group, an alkoxy group or a siloxy group of the formula R.sub.1 R.sub.2 R.sub.3 SiO-- (wherein R.sub.1, R.sub.2 and R.sub.3 each independently represent a hydrogen atom, an alkyl group, an alkoxy group or an aryl group).
摘要:
A liquid crystal device comprising a thermal writing type liquid crystal, an electrode for generating heat necessary for said thermal writing, and a support for supporting said liquid crystal and said electrode, wherein a material having a coefficient of thermal expansion lying between the coefficient of thermal expansion of said electrode and that of said support is arranged between said electrode and said support, whereby said electrode for generating heat can be prevented from being degraded by failure or peeling from the support due to thermal stress.
摘要:
A resin material comprising a polyamide having as chemical structural unit at least one aromatic ring which can rotate around its molecular axis but has no flexibility at another direction, said polyimide being oriented at least at a uniaxial direction, has a low thermal expansion coefficient and can be shaped together with an inorganic material into one body to give a composite shaped article.