摘要:
A silacyclohexanone compound represented by the following general formula (I). ##STR1## wherein Ar denotes a phenyl group or a tolyl group. R denotes a tolyl group, a linear-chain alkyl group with a carbon number of 2-10, a mono- or di-fluoroalkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8 or an alkoxyalkyl group with a carbon number of 2-7. Also, a method of manufacturing silacyclohexane-type liquid crystal compounds represented by the general formula (II) ##STR2## and the general formula (III) ##STR3## which are derived from this compound.
摘要:
A semiconductor memory device has a plurality of memory cells in an array, into which the memory cells data is writable, and which can subsequently be read. Each memory cell has a switching element with one terminal connected to a bit line of the array another terminal connected to at least one ferroelectric capacitor, and a control terminal connected to a word line. The cell may then be operated to detect the change in polarization of the ferroelectric capacitor when a voltage is applied which is not sufficient to cause a change of state of the ferroelectric capacitor. Alternatively, a ferroelectric capacitor and a capacitor other than a ferroelectric capacitor is connected to the switching element. In a further alternative, a plurality of ferroelectric capacitors are connected to the switching element, so that different data are writable into each.
摘要:
A semiconductor module having heat sink plates and an insulating plate laminated under the semiconductor chips, wherein the thickness of the support base plate is set to be 2.5 times in thickness of the insulating plate, which is the maximum thickness among the heat sink plates and the insulating plate laminated in the semiconductor module, so that the thermal fatigue lives of the solder layers are balanced, and the life of the whole semiconductor module can be prolonged.
摘要:
There is provided a silacyclohexane compound and method of making same. The silacyclohexane compound has the following formula (1): ##STR1## wherein R denotes a linear-chain alkyl group with a carbon number of 1-10, a mono- or di-fluoroalkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8, ##STR2## denotes a trans-1-sila-1,4-cyclohexylene or a trans-4-sila-1,4-cyclohexylene group having silicon at positions 1 or 4 with substitutional group(s) of H, F, C1 or CH.sub.3 ; n denotes 0 or 1; L.sub.1 and L.sub.2 independently denote H.F, C1, CN or CH.sub.3 ; L.sub.3 denotes F; m denotes O, 1 or 2; and X denotes H, CN, F, C1, CF.sub.3, CC1F.sub.2, CHFC1, OCC1F.sub.2, OCHFC1, OCHF.sub.2, OCF.sub.3, R or OR group.
摘要:
Disclosed is a semiconductor device having a support region, an element-forming region (e.g., an epitaxial layer) and a buried layer between the support region and the element-forming region, with at least one of a MOS element and a bipolar element being formed in the element-forming region. The feature of the present invention resides in that atoms of at least one element selected from oxygen, nitrogen, carbon, argon, neon, krypton and helium is contained in a layer in at least one of the element-forming region and the buried layer, so as to suppress auto-doping of impurities from the buried layer into the element-forming region and suppress swelling of the buried layer.
摘要:
The present invention relates to a semiconductor device including a MOS transistor which is formed with a source region, a drain region and a channel region by the use of polycrystalline silicon, and a method of manufacturing the semiconductor device. Ions of carbon, oxygen or/and nitrogen are introduced into a polycrystalline silicon layer over the whole area thereof, and restrain conductive ions in the source and drain regions from diffusing into the channel region.
摘要:
A resource management system includes a resource management device that manages a usage of a resource, a reservation management device that manages a reservation for the resource, and a communication relay device that communicates with the resource management device. The resource management device receives reservation information transmitted from the reservation management device. The reservation information is information on the reservation for the resource. The resource management device transmits, to the communication relay device, a request for identification information identifying the communication relay device. The resource management device receives the identification information, which is transmitted from the communication relay device in response to the request. The identification information is used to execute an event associated with the reservation information. The resource management device transmits, to an operation display terminal that displays a usage status of the resource, the identification information and a password that is associated with the identification information.
摘要:
Technology leading to a size reduction in a power conversion apparatus comprising a cooling function and technology relating to enhancing productivity and enhancing reliability necessary for commercial production are provided. Series circuits comprising an upper arm and lower arm of an inverter circuit are built in a single semiconductor module 500. The semiconductor module has cooling metal on two sides. An upper arm semiconductor chip and lower arm semiconductor chip are wedged between the cooling metals. The semiconductor module is inserted inside a channel case main unit 214. A DC positive electrode terminal 532, a DC negative electrode terminal 572, and an alternating current terminal 582 of a semiconductor chip are disposed in the semiconductor module. The DC terminals 532 and 572 are electrically connected with a terminal of a capacitor module. The alternating current terminal 582 is electrically connected with a motor generator via an AC connector.
摘要:
A multilayer wiring board includes a double-sided wiring board, an insulating substrate stacked on the double-sided wiring board, vias provided in through-holes in the insulating substrate, an outermost wiring on an upper surface of the insulating substrate, a first fiducial mark provided on the double-sided wiring board, and a second fiducial mark provided on the insulating substrate. The first fiducial mark contains a wiring of the double-sided wiring board. The second fiducial mark contains at least one via out of the vias. The first and second fiducial marks are provided for positioning the double-sided wiring board and the insulating substrate to each other. This multilayer wiring board includes layers positioned precisely.
摘要:
Technology leading to a size reduction in a power conversion apparatus comprising a cooling function and technology relating to enhancing productivity and enhancing reliability necessary for commercial production are provided. Series circuits comprising an upper arm and lower arm of an inverter circuit are built in a single semiconductor module 500. The semiconductor module has cooling metal on two sides. An upper arm semiconductor chip and lower arm semiconductor chip are wedged between the cooling metals. The semiconductor module is inserted inside a channel case main unit 214. A DC positive electrode terminal 532, a DC negative electrode terminal 572, and an alternating current terminal 582 of a semiconductor chip are disposed in the semiconductor module. The DC terminals 532 and 572 are electrically connected with a terminal of a capacitor module. The alternating current terminal 582 is electrically connected with a motor generator via an AC connector.