Abstract:
A flexure transducer element which is used in an acceleration sensor for sensing an acceleration applied thereto comprises (1) a frame having an upper surface and a lower surface, (2) a sheet member which has a plurality of flexible parts and a center part, each flexible part extending between at least a portion of an inner edge of the frame and the center part and being integrally connected to them, (3) a weight which has a neck part integrally connected to the center part of the sheet member and which is hung from the sheet member through the neck part, and (4) a support member which supports the lower surface of the frame and of which inward side surface faces to a side surface of the weight through a first space therebetween, a second space which is continuous with the first space is defined between each flexible part of the sheet member and the weight, a third space is defined between the frame and the sheet member and/or through the sheet member, the frame and the sheet member are connected to each other and the sheet member and the weight are connected to each other in such a manner that, when the acceleration is applied to the element, at least two flexible parts are elastically deformed so that the weight is displaced relatively to the frame, the weight and the support member are formed of a semiconductor substrate, the second space is formed by removing a sacrificial layer which is provided in the semiconductor substrate, and the frame and the sheet member comprises an epitaxial layer provided on the semiconductor substrate.
Abstract:
A flexure transducer which is used for the detection of an applied acceleration comprising (1) a frame having an upper surface and a lower surface, (2) a sheet member which has a plurality of flexible parts and a center part and whose flexible parts are extended between at least a part of the inner edge of the frame and the center part and are integrally continuous with them, (3) a weight which has a neck part integrally connected to the center part of the sheet member and is hung from the sheet member through the neck part and (4) a support member which supports the lower surface of the frame and whose inner surface faces the side surface of the weight with a first gap therebetween, a second gap being continuous with the first gap, and defined between the flexible parts of the sheet member and the weight, a third gap being defined between the frame and the sheet member and/or inside the sheet member, the frame and the sheet member being joined to each other and the sheet member and the weight being joined to each other in such a manner that, when an acceleration is applied to the transducer, at least two flexible parts are elastically deformed and, as a result, the weight is displaced relatively to the frame, the weight and the support member being formed of a semiconductor substrate, the 2nd gap being formed by removing a sacrifice layer which is provided in the semiconductor substrate and the frame and the sheet member comprising epitaxial layers provided on the semiconductor substrate.
Abstract:
A field emission source (10) comprises a p-type silicon substrate (1), an n-type region (8) formed into stripes in a major surface of the substrate (1), strong-field drift layers (6) which are formed on the n-type region (8) in which electrons injected from the n-type region (8) drift, and which are made of oxidized porous polysilicon, a polysilicon layer (3) formed between the strong field drift layers (6), surface electrodes (7) formed into stripes in a direction perpendicular to the stripes of the n-type region (8). A voltage is selectively applied to either the n-type region (8) or the surface electrodes (7) so as to emit electrons from predetermined areas of the surface electrodes (7).
Abstract:
PROBLEM TO BE SOLVED: To provide an etching method which facilitates confirmation of end of etching without making a preliminary test, and suppresses or prevents the microloading effect and deformation caused by side etching. SOLUTION: In the etching method for etching a semiconductor substrate 1 to form a pattern, a pseudo pattern 3 is provided on the region of the semiconductor substrate 1 other than a region on which a desired pattern is formed, the end point of etching of the pseudo pattern 3 is monitored simultaneously with the etching, and the etching is terminated when the end point reaches a predetermined depth D. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an actuator and an optical device for accurately determining a position of a movable plate in a state of applying no stress to the movable plate by a plate driving part. SOLUTION: This actuator has the movable plate 2 displaceable by deflecting a flexible plate support part 1 having one end connected to a fixing part 10, the plate driving part 3 for driving the movable plate 2, a movable latch part 5 displaceable by deflecting a flexible latch support part 4 having one end connected to the fixing part 10, and a latch driving part 6 for driving a movable latch part 5. When the plate driving part 3 does not apply stress to the movable plate 2, and when the latch driving part 6 does not apply stress to the movable latch part 5, the movable latch part 5 holds a position of the movable plate by contacting with the movable plate, and when the plate driving part 3 displaces the movable plate 2, the latch driving part 6 displaces the movable latch part 5 in the direction for separating from the movable plate 2. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a three-dimensional structure for suppressing occurrence of operation failure, having a high degree of freedom of structural and process design in design and working of the structure. SOLUTION: The method for manufacturing semiconductor structure comprises a first patterning process for forming a projecting part by selectively removing a first substrate from a first main surface of the first substrate, a substrate joining process for joining the first main surface to the main surface of a second substrate, and a back face etching process for leaving only the projecting part by uniformly removing the first substrate from the second main surface opposed to the first main surface. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To easily and accurately position the angle of a plate-like structure pattern used as a mask, to a (111) face of a semiconductor substrate wafer. SOLUTION: In this method of manufacturing a semiconductor structure, the semiconductor substrate wafer is wet-etched to form the plate-like structure with the side faces formed as the (111) faces almost perpendicular to the main surface of the semiconductor substrate wafer. The orientation flat faces of the semiconductor substrate wafer are formed as the (111) faces, and a wet etching mask is formed aligned to be parallel with the orientation flat faces as a basis to form the plate-like structure. Or (111) face detecting patterns are provided at least at two parts on the semiconductor substrate wafer, and after detecting the (111) faces, the (111) face detecting patterns coinciding with the (111) faces are set as an alignment reference. The formed plate-like structure is used as a mirror in an optical switching device. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prevent side etching at both longitudinal ends of a plate-like structure. SOLUTION: In this manufacturing method for a semiconductor structure, a semiconductor substrate is etched to form the plate-like structure with side faces formed as (111) faces almost perpendicular to the main surface of the substrate. A mask pattern is formed having a pair of slits corresponding to the side faces, and after wet etching is performed to form the side faces formed of the (111) faces, a part other than the plate-like structure is eliminated by dry etching. With the formation of the (111) faces by wet etching and the dissolution of side etching by dry etching, the plate-like structure is accurately formed with a required minimum produced area. The formed plate-like structure is used as a mirror in an optical switching device. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an optical switch of which the optical axis is easily adjusted and which is easily manufactured. SOLUTION: The optical switch is composed of a plurality of optical waveguides 4 of which the both ends are formed as a light incident part 1 and a light emitting part 2 and the outer circumference of a translucent material is surrounded by a light reflection film, a mirror 5 which is provided between adjacent optical waveguides 4 which are arranged in a way that the light emitting part 2 and the light incident part 1 are opposite to each other and movable between a position at which the light emitted from the light emitting part 2 is reflected and a position at which the light is not reflected, and an end part waveguide 6, of which the circumference of the light-transmissive material is surrounded by a light reflection film, and which waveguide is arranged in a manner that the light emitting part 2 or the light incident part 1 is opposite to the light incident part 1 or the light emitting part 2 of the optical waveguide 4 which is located at the end part among the plurality of optical waveguides 4 via the movable mirror 5. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an optical switch which can control the passage or blocking of even a signal having a relatively large luminous flux. SOLUTION: The optical switch comprises a swing body 1 and a base substrate 2. The swing body 1 has a movable electrode 13 at one end of at least a moving element 12 and a switch plate 11 blocking light at the other end and is equipped with connectors 14 and 14 projecting from the moving element 12 and having elasticity in a twisting direction and an anchor 15 formed integrally therewith. The base substrate 2 has a support part 21 supporting the swing body 1 by abutting against the part of the moving element 12 where the connectors 14 and 14 are provided and has a fixed electrode 23 opposite the movable electrode 13; and the connectors 14 and 14 are provided at positions displaced from the center position of the moving element 12 toward the movable electrode 13 to increase the quantity of displacement of the switch plate 11. COPYRIGHT: (C)2004,JPO