摘要:
There is provided a resin composition suitable for insulating materials for use in electronic parts for handling high frequency signals, low in dielectric constant and low in dielectric dissipation factor, capable of forming thin film by low temperature curing, excellent in the adhesiveness to conductive foil and excellent in flexibility; a cured product derived from the composition; and a film substrate and an electronic part using the composition. A resin composition, low in dielectric dissipation factor, comprising: a crosslinking component having a weight averaged molecular weight of 1,000 or less and a plurality of styrene groups represented by the following general formula: wherein R represents a hydrocarbon moiety; each R1, which may be the same or different, represents a hydrogen atom or a C1-20 hydrocarbon group; R2, R3 and R4, which may be the same or different, represent a hydrogen atom or a C1-6 alkyl group; and m is an integer of 1 to 4, and n is an integer of 2 or more; and a rubber component having a weight averaged molecular weight of 5,000 or more and styrene units; a cured product; and a film substrate and an electronic part using the composition.
摘要:
A semiconductor test apparatus includes an analog-to-digital converter for converting into a digital signal an analog output from a circuit under test; a test-apparatus-ADC-control-signal generation circuit for generating a control signal for the analog-to-digital converter in accordance with an activation signal entered from the outside; a measured data memory for storing, as measured data for each conversion, a signal output from the analog-to-digital converter; an address counter for generating an address signal for the measured data memory; a DAC counter for generating data to be input to the circuit under test; and a data write control circuit which produces, in response to a flag signal output from the analog-to-digital converter and representing that conversion is being performed, an update signal for the address counter, a memory write signal for the measured data memory, and an update signal for the DAC counter.
摘要:
In a threshold analysis method obtaining threshold voltages of all bits in a flash memory through single processing, fail bit map information is examined in order from a smaller voltage applied to the flash memory. As to a bit exhibiting a value, read from the flash memory, first mismatching a determination value, the threshold voltage is settled on the basis of a voltage applied when the bit fails in reading.
摘要:
A method for forming a wrinkle-free insulating layer from a resin having both photo-curing and thermosetting properties by reducing the magnitude of a concentration gradient of residual solvent in the thickness direction of the resin layer after drying the resin layer and prior to photo-curing, developing and thermosetting the resin layer. In one embodiment, such reduction is achieved by passing a substrate bearing the resin layer by a roll coater charged with a solvent for the resin, and allowing solvent to be absorbed by the resin layer. The solvent application roll can be spaced from the resin layer by a small gap such that solvent vapor is applied to the resin layer. Alternatively, solvent in liquid form can be applied to the resin layer. In another embodiment, the concentration gradient of residual solvent in the resin layer is reduced by affixing a barrier film to the resin layer and then heating the resin layer.
摘要:
In a mobile radio communication device, a gain of a GaAs FET for high frequency power amplification is controlled by a negative voltage based on a clock signal generated by a microcomputer in the device.
摘要:
A braking circuit provided with an antilocking apparatus, which prevents the pumping pulsation from transferring onto the master cylinder side during pumping operation time in a reflux system of antilocking apparatus of discharging the operating liquid into the reflux passage from the wheel brake at the antilocking time so as to reflux it onto the master cylinder side by a pump provided on the reflux passage, thereby to effectively restrain the undesired pulsation to be transferred onto the master cylinder side by the equalization of the discharge pressure through the absorption of the discharge pressure.
摘要:
A parallel connected gate turn-off thyristor device including an additional short circuiting conductor connected between the gate terminals of the respective gate turn-off thyristors so as to bypass a part of the turn-on and turn-off gate currents of one gate turn-off thyristor to other gate turn-off thyristors to increase the turn-on and turn-off gate currents of the other gate turn-off thyristors thereby hastening the turn-on and turn-off operations of the other gate turn-off thyristors.
摘要:
A time correction circuit for a timepiece with an electrochromic display which includes a timing circuit having counters counting time standard clock signals and for generating time display output signals, a time display circuit having an electrochromic display section displaying output signals from said counters, a correction mode changeover switch selectively switching between a time display mode and a time correction mode, a correcting circuit which works only when said correction mode changeover switch selects the correction mode to change the count in the counters, a writing and erasing control circuit for controlling the timing of the writing and the erasing of the electrochromic display section in response to the mode selected by the correction mode changeover switch and a correction pulse generating circuit for outputting time correction writing pulses of smaller pulse width than time correction writing and erasing pulses during the time display mode when the correction mode changeover switch selects the time correction mode to enable fast correction of the electrochromic display.
摘要:
According to one embodiment, a semiconductor light emitting device includes a metal substrate, a first semiconductor layer, a first semiconductor layer, a second semiconductor layer, a light emitting layer, a first intermediate layer and a second intermediate layer. The substrate has a coefficient of thermal expansion not more than 10×10−6 m/K. The first and second semiconductor layer include a nitride semiconductor. The second semiconductor layer is provided between the substrate and the first semiconductor layer. The emitting layer is provided between the first semiconductor layer and the second semiconductor layer. The first intermediate layer is provided between the substrate and the second semiconductor layer. The second intermediate layer is provided between the first intermediate layer and the second semiconductor layer. a surface roughness of a first surface of the substrate contacting the first intermediate layer is less than a thickness of the first intermediate layer.
摘要:
According to one embodiment, a semiconductor light emitting device includes first and second electrodes, first, second and third semiconductor layers, and a light emitting layer. The first semiconductor layer of a first conductivity type is provided on the first electrode. The light emitting layer is provided on the first semiconductor layer. The second semiconductor layer of a second conductivity type is provided on the light emitting layer. The third semiconductor layer with low impurity concentration is provided on a part of the second semiconductor layer. The second electrode includes a pad section and a narrow wire section. The pad section is provided on the third semiconductor layer. The narrow wire section extends out from the pad section and includes an extending portion extending along a plane perpendicular to a stacking direction. The narrow wire section is in contact with the second semiconductor layer.