摘要:
A magnetic device comprising at least one thin domain layer of a magnetizable material which has an easy axis of magnetization which is substantially normal to the surface of the layer and in which magnetic domains are propagated under the influence of a bipolar current, for example an alternating current, by a pattern of electrically conductive material with which the layer is provided. Elements are furthermore present which cause an asymmetry force and thus determine the direction in which the domains are propagated. The electrically conductive material and the elements are present in a single pattern which is constructed from at least a layer of magnetic material.
摘要:
A magnetic bubble device comprising a non-magnetic substrate layer, and a sequence of magnetic layers joined to each other and to the magnetic substrate layer, e.g. by epitaxial growing of crystalline layers, whereby at least two of the magnetic layers may accommodate magnetic bubbles which are stably joined through an interlayer magnetic compensation wall, or by an essentially finite potential barrier.
摘要:
A device for storing digital information in the form of magnetic domains including at least two ferrimagnetic layers on a substrate. The ferrimagnetic layers are separated by a compensation wall and in the presence of a bias magnetic field single magnetic domains and superposed magnetic domain pairs, the superposed domains being separated by a compensation wall, are generated. All single and superposed domains are mutually repulsive. The domains within a superposed pair are attracted to each other. The generated domains are propagated to a shift register and when the reigster is filled a row of domains is coincidentally propagated, transversely out of the register, to a domain array region adjacent the register. Rows are then propagated through the array region to a second shift register where they are individually detected and annihilated. A control device assures the proper working relationship between all elements.
摘要:
A three-dimensional image display system, based on a novel depth concept referred to as Double-D-Depth, includes a first display device (3) and at least a second display device (4) which, viewed along the system axis (9-91), are offset with respect to each other and are each intended to partially display the same two-dimensional image of a scene, while parameters which are relevant to depth representation are included in the form of an additional dedicated intensity gradation in at least one of the displayed images, and all images, together with the axial distance (.quadrature.L) in between, evoke a depth effect with a viewer (10).
摘要:
A description is given of a method and a device (1) for providing (replicating) a patterned resyntetic resin relief (37) on the surface (25) of a glass substrate (27). For this purpose, a UV-curable acrylate lacquer (33) is applied to the surface (25), after which a transparent mould (3) having a relief (13) is rolled-off over the surface (25). By means of a UV light source (17) and an elliptic mirror (21), the lacquer is cured at the location of the focal line (23), thereby forming said relief (37). The relief (13) of the mould (3) is replicated on the glass substrate (27). The method described enables a relief of small dimensions (10.times.10 .mu.m) to be seamlessly provided on a large fiat surface (1.times.1 m), without being hindered by large release forces.
摘要:
A method of growing mixed crystals having at least two lattice sites each having a different number of adjacent oxygen ions from melts of oxidic multi-component systems, homogeneous mixed crystals being grown such that the cations intended to occupy the first lattice site having the highest number of adjacent oxygen ions and to occupy the second lattice site having the next lowest number of adjacent oxygen ions are chosen such that the ratio of the bond length of the cations in the first lattice site to the bond length of the cations in the second lattice site is in the range from 0.7 to 1.5.
摘要:
In a method of manufacturing a semiconductor device, at least a support body (1) and a monocrystalline semiconductor body (2) are provided with at least one flat optically smooth surface obtained by means of bulk-reducing polishing (mirror polishing), while at least the semiconductor body is provided at the optically smooth surface with an oxide layer (3). The two bodies (1 and 2) are brought into contact with each other in a dust-free atmosphere after their flat surfaces have been cleaned in order to obtain a mechanical connection. Before the bodies are brought into contact with each other, at least the oxide layer (3) on the semiconductor body (2) is subjected to a bonding-activating operation, while after a connection has been formed between the surfaces, radiation (5) of a laser is focused on the connection surface of the two bodies and material of at least the semiconductor body is molten locally near the connection surface by means of the laser radiation. After solidification, a locally fused connection has been established between the two bodies. The semiconductor body (2) is formed from a material admitting a sufficient oxygen diffusion.
摘要:
An optical device is manufactured by providing a disc-shaped body of a light-conducting material on a plane surface of a disc-shaped carrier body, grinding the light-conducting material mechanically to a thickness which exceeds the desired ultimate layer thickness by at least 50 .mu.m, subjecting the light-conducting material to alternate tribochemical and mechanical polishing treatments until a thickness is obtained which exceeds the desired ultimate layer thickness by approximately 10 .mu.m, and subsequently polishing the light-conductor body tribochemically until the desired layer thickness is obtained.
摘要:
A method for manufacturing a semiconductor device comprising at least a support body and a monocrystalline semiconductor body, in which both bodies are provided with at least one flat optically smooth surface obtained by means of bulk-reducing polishing (mirror polishing), and at least the semiconductor body is then provided at the optically smooth surface with an electrically insulating layer with at least the electrically insulating layer on the semiconductor body being subjected to a bonding-activating operation, whereupon both bodies after their flat surfaces have been cleaned, are contacted with each other in a dust-free atmosphere in order to obtain a rigid mechanical connection, after which they are subjected to a heat treatment of at least 250.degree. C., whereupon the semiconductor body is etched to a thin layer having a thickness lying between 0.05 and 100 .mu.m.
摘要:
In a method of manufacturing a semiconductor device of the "semiconductor on insulator" type comprising at least one carrier body and a monocrystalline semiconductor body, in a major surface (2) of a monocrystalline semiconductor body (1) grooves (3) are provided having a predetermined depth. The surface provided with grooves is coated with a layer (4) of material resistant to polishing; and this layer is coated with a layer (5) of a chemomechanically polishable material having a layer thickness exceeding the groove depth, the latter layer (5) being polished to flatness and smoothness. The polished surface of the semiconductor body (1) is connected to a smooth flat major surface of a carrier body (6). Subsequently, the semiconductor body (1) is made thin, at least the last part of this operation consisting of a polishing step, which terminates on the layer (4) of material resistant to polishing so that mutually insulated "semiconductor an insulator" regions are obtained, the thickness of the semiconductor regions being equal to the depth of the grooves.