摘要:
Disclosed is a circuit substrate and a semiconductor device to which the circuit substrate is applied. The circuit substrate has an insulating layer and an electrically conductive layer. The insulating layer is composed of a sintered aluminum nitride composition containing: aluminum nitride; a first component given by a compound containing an element which is selected from the group consisting of group IIa elements and group IIIa elements of the periodic table; a second component given by either a simple boron or a boron compound; and a third component give by either a simple manganese or a manganese compound. The electrically conductive layer contains: a conductive component given by a metal or an electrically conductive compound for exhibiting electric conductivity; aluminum nitride; the first component; the second component; and the third component. The semiconductor device has the above circuit substrate, a semiconductor element mounted on the circuit substrate, and a cap being tightly bonded to the circuit substrate with a sealing glass to cover the semiconductor element.
摘要:
A fuel cell system includes a cathode, an anode, a fuel supply unit configured to supply a fuel containing methanol and water to the anode, a methanol supply unit configured to supply methanol to the fuel, a sensor which measures a methanol concentration of the fuel, a current measuring unit configured to measure a current flowing between the cathode and the anode, a concentration adjusting unit and a correction unit. The concentration adjusting unit is configured to adjust the methanol concentration of the fuel by controlling the methanol supply unit by using an output value of the sensor. The correction unit is configured to correct a data of a relation between the methanol concentration of the fuel and the output value of the sensor, using an output of the current measuring unit.
摘要:
Disclosed is a sintered aluminum nitride composition and a circuit substrate for use in semiconductor device. The sintered aluminum nitride composition comprises: aluminum nitride; a first component given by a compound containing an element which is selected from the group consisting of alkaline earth elements and group IIIa elements of the periodic table; a second component made of either a simple silicon or a silicon-containig compound; and a third component made of either a simple manganese or a manganese-containing compound. The circuit substrate has an insulating layer which is compoesd of the above-described sintered aluminum nitride composition, and an electrically conductive layer containing an electrically conductive material and the same components as those of the insulating layer.
摘要:
The invention provides a fuel cartridge for supplying methanol aqueous solution to a direct methanol fuel cell system, comprising a memory which stores at least a concentration of the methanol aqueous solution.
摘要:
Disclosed is a silicon nitride circuit substrate, a manufacturing procee thereof, and a semiconductor device therewith. The circuit substrate comprises: a silicon nitride substrate; a metal circuit plate; and a intermediate layer being interposed between the silicon nitride board and the metal circuit plate for joining the silicon nitride substrate and the metal circuit plate, and having a compound containing an aluminum oxide component. The concentration of the aluminum oxide component in the intermediate layer is higher in the side of the metal circuit plate than in the side of the silicon nitride board.
摘要:
Disclosed are a high thermal conductivity silicon nitride circuit substrate which comprises a silicon nitride ceramic plate having a thermal conductivity at 25.degree. C. of 60 W/m.multidot.K or more and a metal circuit plate joined to the silicon nitride ceramic plate through an intermediate layer containing oxygen and at least one element selected from the group consisting of titanium, zirconium, hafnium, niobium and aluminum, and a semiconductor device using the same.
摘要:
A direct methanol fuel cell includes a cathode catalyst layer; an electrolyte membrane; an anode catalyst layer; a first fuel control layer that is water-repellent and conductive and that has pores; a second fuel control layer that is water-repellent and conductive and that has larger pores than the those of the first fuel control layer; a third fuel control layer that is water-repellent and conductive and that has smaller porous than those of the first fuel control layer and those of the second fuel control layer; and an anode GDL layer that is water-repellent and conductive, wherein the membrane and the layers above are arranged in the above order.
摘要:
The present invention provides a catalyst having high activity and excellent stability, a process for preparation of the catalyst, a membrane electrode assembly, and a fuel cell. The catalyst of the present invention comprises an electronically conductive support and catalyst fine particles. The catalyst fine particles are supported on the support and are represented by the formula (1): PtuRuxGeyTz (1). In the formula, u, x, y and z mean 30 to 60 atm %, 20 to 50 atm %, 0.5 to 20 atm % and 0.5 to 40 atm %, respectively. When the element represented by T is Al, Si, Ni, W, Mo, V or C, the content of the T-element's atoms connected with oxygen bonds is not more than four times as large as that of the T-element's atoms connected with metal bonds on the basis of X-ray photoelectron spectrum (XPS) analysis. When the T-element is Ti, Hf, Sn, Ta, Zr or Nb, the content of the T-element's atoms connected with metal bonds is not more than twice as large as that of the T-element's atoms connected with oxygen bonds on the basis of XPS analysis.
摘要:
The present invention provides a catalyst having high activity and excellent stability, a process for preparation of the catalyst, a membrane electrode assembly, and a fuel cell. The catalyst of the present invention comprises an electronically conductive support and catalyst fine particles. The catalyst fine particles are supported on the support and are represented by the formula (1): PtuRuxGeyTz (1). In the formula, u, x, y and z mean 30 to 60 atm %, 20 to 50 atm %, 0.5 to 20 atm % and 0.5 to 40 atm %, respectively. When the element represented by T is Al, Si, Ni, W, Mo, V or C, the content of the T-element's atoms connected with oxygen bonds is not more than four times as large as that of the T-element's atoms connected with metal bonds on the basis of X-ray photoelectron spectrum (XPS) analysis. When the T-element is Ti, Hf, Sn, Ta, Zr or Nb, the content of the T-element's atoms connected with metal bonds is not more than twice as large as that of the T-element's atoms connected with oxygen bonds on the basis of XPS analysis.
摘要:
A fuel cartridge to be connected to a direct methanol fuel cell power generating device includes a spare fuel tank which stores a liquid fuel and is to be connected to the direct methanol fuel cell power generating device and a harmful substance trap member. The spare fuel tank stores a liquid fuel and is to be connected to the direct methanol fuel cell power generating device. The harmful substance trap member is fixed to the spare fuel tank and is to be connected to the direct methanol fuel cell power generating device. The harmful substance trap member contains a harmful substance trap material which traps gaseous harmful substances exhausted from the direct methanol fuel cell power generating device.