摘要:
A volatile semiconductor memory module (RAM) is combined with a permanent memory based on an electrically polarizable, preferably ferroelectric, layer within an integrated monolithic module in such a manner that, as a result of a STORE command, the information present in the semiconductor memory is permanently stored by polarization of selected regions of the electrically polarizable layer. In the same way the permanently stored information can be read out again as a result of a RECALL command and returned to the semiconductor memory. Preferably, a ferroelectrically polarizable layer 11 is applied to the semiconductor memory, which layer, in the same way as the semiconductor memory, is provided on its upper side and underside with word and bit lines in the form of strip electrodes, 9,12. The strip electrode system 9 on the underside of the ferroelectric layer 11 simultaneously forms the word or bit line system of the semiconductor memory facing the surface. In this manner each semiconductor memory cell 7 is clearly allocated a non-volatile ferroelectric memory cell 13.
摘要:
The invention provides for a cermet powder containing 75-90% by weight of at least one hard material powder, from 10 to 25% by weight of one or more matrix metal powders and up to 3% by weight of at least one modifier, wherein the matrix metal powder or powders contain from 0 to 38% by weight of cobalt, from 0 to 38% by weight of nickel, from 0 to 20% by weight of aluminum, from 0 to 90% by weight of iron and from 10 to 35% by weight of chromium and the sum of the contents of iron and chromium is in the range from 10 to 95% by weight and the sum of the contents of cobalt, nickel and iron is in the range from 65 to 95% by weight. The invention also relates to a cermet and a process to make the cermet containing the cermet powder and shaped article coated with the cermet powder and a process to make the shaped article.
摘要:
The invention relates to mixtures of metal, alloy or composite powders which have a mean particle diameter D50 of not more than 75 μm, preferably not more than 25 μm, and are produced in a process in which a starting powder is firstly deformed to give platelet-like particles and these are then comminuted in the presence of milling aids together with further additives and also the use of these powder mixtures and shaped articles produced therefrom.
摘要:
This invention relates to amorphous fibers containing Si, B and N, to a process for the production thereof and to the use thereof, and to composites containing these amorphous fibers and the production thereof.