All The Claims

1. A nonvolatile semiconductor memory device comprising a memory cell, the memory cell comprising:
a first conductivity type well in a silicon substrate;
a second conductivity type semiconductor region having at least a pair of a first semiconductor region and a second semiconductor region, the second conductivity type semiconductor region being formed in the first conductivity type well;
a first gate insulating layer formed in the silicon substrate in such a manner as to at least cover a gap between the pair of the first and the second semiconductor region;
a first gate formed on the first gate insulating layer;
a second insulating layer formed to cover the first gate;
a second gate formed on the second insulating layer;
a third gate formed alongside the first gate in the silicon substrate with being insulated from the first gate and the second gate with the third insulating layer and a multilayer of at least the second insulating layer and a fourth insulating layer; and
a fifth insulating layer formed between the first gate and another first gate in a direction intersecting a direction in which the first gate and the third gate are aligned:
wherein:
one of surfaces of the first gate, which faces the second gate with the second insulating layer being formed therebetween, has a dented shape as viewed in sections which are perpendicular to the silicon substrate, one of the sections being taken in a direction extending from the first gate to the third gate and the other section being taken in a direction extending from the first gate to the fifth insulating layer.
2. The nonvolatile semiconductor memory device according to claim 1, wherein the fourth insulating layer is formed from an insulating layer material which is different from that used for forming the fifth insulating layer.
3. The nonvolatile semiconductor memory device according to claim 2, wherein the fourth insulating layer is of a silicon nitride film and the fifth insulating layer is of a silicon oxide film.
4. The nonvolatile semiconductor memory device according to claim 2, wherein the fourth insulating layer is of a silicon oxide film and the fifth insulating layer is of a silicon nitride film.
5. The nonvolatile semiconductor memory device according to claim 1, wherein a height of the first gate is below at least one of those of the fourth insulating layer and the fifth insulating layer.
6. The nonvolatile semiconductor memory device according to claim 1, wherein a height of the second gate is greater than that of the fourth insulating layer and equal to that of the fifth insulating layer.
7. The nonvolatile semiconductor memory device according to claim 1, wherein the height of the second gate is greater than that of the fifth insulating layer and equal to that of the fourth insulating layer.
8. The nonvolatile semiconductor memory device according to items claim 1, wherein one of the first gate, the second gate, and the third gate serves as an erase gate.
9. The nonvolatile semiconductor memory device according to claim 1 wherein an interpoly dielectric film formed between the first gate and the second gate is formed from a high-k material.
10. A nonvolatile semiconductor memory device comprising a memory cell, the memory cell comprising:
a first conductivity type well formed in a silicon substrate;
a second conductivity type semiconductor region which is a pair of a first semiconductor region and a second semiconductor region, the second conductivity type semiconductor region being formed in the first conductivity type well;
a first gate insulating layer formed in the silicon substrate in such a manner as to at least cover a gap between the first and the second semiconductor region of the second conductivity type semiconductor region;
a first gate formed on the first gate insulating layer;
a second insulating layer formed to cover the first gate;
a second gate formed on the second insulating layer;
a third gate adjacent to the first gate; and
a fourth insulating layer adjacent to the first gate in a direction intersecting a direction in which the first gate is adjacent to the third insulating layer;
wherein:
one of surfaces of the first gate, which faces the second gate with the second insulating layer being formed therebetween, has a dented shape as viewed in sections which are perpendicular to the silicon substrate, one of the sections being taken in a direction extending from the first gate to the third insulating layer and the other section being taken in a direction extending from the first gate to the fourth insulating layer.
11. The nonvolatile semiconductor memory device according to claim 10, wherein the third insulating layer is formed from an insulating layer material which is different from that used for forming the fourth insulating layer.
12. The nonvolatile semiconductor memory device according to claim 10, wherein the third insulating layer is of a silicon nitride film and the fourth insulating layer is of a silicon oxide film.
13. The nonvolatile semiconductor memory device according to claim 10, wherein the third insulating layer is of a silicon oxide film and the fourth insulating layer is of a silicon nitride film.
14. The nonvolatile semiconductor memory device according to claim 10, wherein a height of the first gate is below at least one of those of the third insulating layer and the fourth insulating layer.
15. The nonvolatile semiconductor memory device according to claim 10, wherein a height of the second gate is greater than that of the third insulating layer and equal to that of the fourth insulating layer.
16. The nonvolatile semiconductor memory device according to claim 10, wherein the height of the second gate is greater than that of the fourth insulating layer and equal to that of the third insulating layer.
17. The nonvolatile semiconductor memory device according to claim 10, wherein the first gate is a floating gate and the second gate serves both as a control gate and an erase gate.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A method of manufacturing an iron-based sintered alloy member having a composition consisting of 0.5 to 7% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, and the balance of Fe and inevitable impurities,
the method comprising:
formulating an Fe powder, a graphite powder and a Cu alloy powder, as raw powders;
mixing the powders to form a powder mixture; and
forming the powder mixture into a green compact and sintering the green compact;
wherein the Cu alloy powder has a composition consisting of 1 to 10% by mass of Fe, 0.2 to 1% by mass of oxygen, and the balance of Cu and inevitable impurities.
2. A method of manufacturing an iron-based sintered alloy member having a composition consisting of 0.5 to 7% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, 0.0025 to 1.05% by mass of Mn andor 0.001 to 0.7% by mass of Zn, and the balance of Fe and inevitable impurities,
the method comprising:
formulating an Fe powder, a graphite powder and a Cu alloy powder, as raw powders;
mixing the powders to form a powder mixture;
forming the powder mixture into a green compact and sintering the green compact,
wherein the Cu alloy powder has a composition consisting of 1 to 10% by mass of Fe, 0.2 to 1% by mass of oxygen, 0.5 to 15% mass of Mn andor 0.2 to 10% by mass of Zn, and the balance of Cu and inevitable impurities.
3. (canceled)
4. (canceled)
5. A method of manufacturing an iron-based sintered alloy member having a composition consisting of 0.5 to 7% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, 0.001 to 0.14% by mass in total of at least one selected from the group consisting of Al and Si, and the balance of Fe and inevitable impurities,
the method comprising:
formulating an Fe powder, a graphite powder and a Cu alloy powder, as raw powders;
mixing the powders to form a powder mixture; and
forming the powder mixture into a green compact and sintering the green compact,
wherein the Cu alloy powder has a composition consisting of 1 to 10% by mass of Fe, 0.2 to 1% by mass of oxygen, 0.01 to 2% by mass in total of at least one selected from the group consisting of Al and Si, and the balance of Cu and inevitable impurities.
6. A method of manufacturing an iron-based sintered alloy member having a composition consisting of 0.5 to 7% by mass of Cu, 0.1to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, 0.0025 to 1.05% by mass of Mn andor 0.001 to 0.7% bv mass of Zn, 0.001 to 0.14% by mass in total of at least one selected from the group consisting of Al and Si, and the balance of Fe and inevitable impurities,
the method comprising:
formulating an Fe powder, a graphite powder and a Cu alloy powder, as raw powders;
mixing the powders to form a powder mixture; and
forming the powder mixture into a green compact and sintering the green compact,
wherein the Cu alloy powder has a composition consisting of 1 to 10% by mass of Fe, 0.2 to 1% by mass of oxygen, and 0.5 to 15% by mass of Mn andor 0.2 to 10% by mass of Zn, 0.01 to 2% by mass in total of at least one selected from the group consisting of Al and Si, and the balance of Cu and inevitable impurities.
7. (canceled)
8. (canceled)
9. The method of manufacturing the iron-based sintered alloy member according to claim 1, wherein the Fe powder, the graphite powder and the Cu alloy powder are formulated so that the content of the graphite powder is from 0.1 to 1.2% by mass, the content of the Cu alloy powder is from 1 to 7% by mass, and the balance is composed of the Fe powder.
10. An oil pump rotor made of an iron-based sintered alloy, comprising an iron-based sintered alloy having a composition consisting of 0.5 to 7% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, and the balance of Fe and inevitable impurities.
11. An oil pump rotor made of an iron-based sintered alloy, comprising an iron-based sintered alloy having a composition consisting of 0.5 to 7% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, 0.0025 to 1.05% by mass of Mn andor 0.001 to 0.7% by mass of Zn, and the balance of Fe and inevitable impurities.
12. (canceled)
13. (canceled)
14. An oil pump rotor made of an iron-based sintered alloy, comprising an iron-based sintered alloy having a composition consisting of 0.5 to 7% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, 0.001 to 0.14% by mass in total of at least one selected from the group consisting of Al and Si, and the balance of Fe and inevitable impurities.
15. An oil pump rotor made of an iron-based sintered alloy, comprising an iron-based sintered alloy having a composition consisting of 0.5 to 7% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, 0.0025 to 1.05% by mass of Mn andor 0.001 to 0.7% by mass of Zn, 0.001 to 0.14% by mass in total of at least one selected from the group consisting of Al and Si, and the balance of Fe and inevitable impurities.
16. (canceled)
17. (canceled)
18. The oil pump rotor according to claim 10, wherein the iron-based sintered alloy has such a texture that base material cells containing Fe, as a main component, Cu and O, which are partitioned with an old Fe powder boundary formed by sintering the Fe powder, as raw powders, are aggregated to form a basis material and the base material cells partitioned with the old Fe powder boundary have such a gradient concentration that the concentration of Cu and O in the vicinity of the old Fe powder boundary is higher than the concentration of Cu and O of the center portion of the base material cell.
19. An iron-based sintered alloy which has a composition consisting of 0.5 to 10% by mass of Cu, 0.1 to 0.98% by mass of C, 0.02 to 0.3% by mass of oxygen, and the balance of Fe and inevitable impurities, and also has a texture composed of an aggregate of base material cells made of an Fe-based alloy containing C, Cu and O, which are partitioned with an old Fe powder boundary formed by sintering an Fe powder, as raw powders,
wherein the base material cells made of the Fe-based alloy containing C, Cu and O, which are partitioned with the old Fe powder boundary, have such a gradient concentration that the concentration of Cu and O in the vicinity of the old Fe powder boundary is higher than the concentration of Cu and O of the center portion of the base material cell.
20. The iron-based sintered alloy according to claim 19, wherein the base material cells made of the Fe-based alloy containing C, Cu and O, which are partitioned with the old Fe powder boundary, have such a gradient concentration that the concentration of Cu and O is maximum in the vicinity of the old Fe powder boundary, while the concentration of Cu and O decreases toward the center portion of the base material cell and reached a minimum value at the center of the base material cell.
21. A method of manufacturing the iron-based sintered alloy member of claim 19, which comprises formulating an Fe powder, a graphite powder and a Cu alloy powder having a composition consisting of 1 to 10% by mass of Fe, 0.2 to 1% by mass of oxygen, and the balance of Cu and inevitable impurities, mixing the powders to form a powder mixture, press-forming the powder mixture into a green compact and sintering the green compact in a hydrogen atmosphere containing nitrogen at a temperature of 1090 to 1300\xb0 C.
22. The method of manufacturing the iron-based sintered alloy member according to claim 2, wherein the Fe powder, the graphite powder and the Cu alloy powder are formulated so that the content of the graphite powder is from 0.1 to 1.2% by mass, the content of the Cu alloy powder is from 1 to 7% by mass, and the balance is composed of the Fe powder.
23. The method of manufacturing the iron-based sintered alloy member according to claim 5, wherein the Fe powder, the graphite powder and the Cu alloy powder are formulated so that the content of the graphite powder is from 0.1 to 1.2% by mass, the content of the Cu alloy powder is from 1 to 7% by mass, and the balance is composed of the Fe powder.
24. The method of manufacturing the iron-based sintered alloy member according to claim 6, wherein the Fe powder, the graphite powder and the Cu alloy powder are formulated so that the content of the graphite powder is from 0.1 to 1.2% by mass, the content of the Cu alloy powder is from 1 to 7% by mass, and the balance is composed of the Fe powder.
25. The oil pump rotor according to claim 11, wherein the iron-based sintered alloy has such a texture that base material cells containing Fe, as a main component, Cu and O, which are partitioned with an old Fe powder boundary formed by sintering the Fe powder, as raw powders, are aggregated to form a basis material and the base material cells partitioned with the old Fe powder boundary have such a gradient concentration that the concentration of Cu and O in the vicinity of the old Fe powder boundary is higher than the concentration of Cu and O of the center portion of the base material cell.
26. The oil pump rotor according to claim 14, wherein the iron-based sintered alloy has such a texture that base material cells containing Fe, as a main component, Cu and O, which are partitioned with an old Fe powder boundary formed by sintering the Fe powder, as raw powders, are aggregated to form a basis material and the base material cells partitioned with the old Fe powder boundary have such a gradient concentration that the concentration of Cu and O in the vicinity of the old Fe powder boundary is higher than the concentration of Cu and O of the center portion of the base material cell.
27. The oil pump rotor according to claim 15, wherein the iron-based sintered alloy has such a texture that base material cells containing Fe, as a main component, Cu and O, which are partitioned with an old Fe powder boundary formed by sintering the Fe powder, as raw powders, are aggregated to form a basis material and the base material cells partitioned with the old Fe powder boundary have such a gradient concentration that the concentration of Cu and O in the vicinity of the old Fe powder boundary is higher than the concentration of Cu and O of the center portion of the base material cell.

1. A yoke unit comprising:
a first yoke with multiple first magnetic pole teeth;
a second yoke with multiple second magnetic pole teeth, each of the second magnetic pole teeth being arranged between two adjacent ones of the first magnetic pole teeth, the second yoke being coaxial with the first yoke; and
a resin section that makes the first and second yokes integral with each other, the resin section including a recessed part formed in an inner surface of the resin section, the recessed part being arranged between the first magnetic pole tooth and the second magnetic pole tooth.
2. The yoke unit according to claim 1, wherein
the first magnetic pole tooth has a V shape in a front view of the first magnetic pole tooth, and
the recessed part has a shape corresponding to the V shape.
3. The yoke unit according to claim 1, wherein the recessed part contacts the second magnetic pole tooth.
4. The yoke unit according to claim 1, wherein a distance between an outer surface of the resin section in an area where the recessed part is not formed and the center of the yoke unit is smaller than a distance between the outer surface of the resin section in an area where the recessed part is formed and the center of the yoke unit.
5. A method of manufacturing a yoke unit, the yoke unit comprising a first yoke with multiple first magnetic pole teeth, a second yoke with multiple second magnetic pole teeth, and a resin section that makes the first and second yokes integral with each other, the first and second yokes being coaxial with each other, each of the second magnetic pole teeth being arranged between the two adjacent ones of the first magnetic pole teeth, the method comprising:
a first step of fitting the first yoke to a lower mold to support the first and second yokes from respective inner surfaces of the first and second yokes;
a second step of fitting the second yoke to the lower mold; and
a third step of shaping the resin section, wherein
in the first step, the position of the first yoke in the circumferential direction relative to the lower mold is determined by making the first magnetic pole tooth contact a projecting part formed in the lower mold, and
in the second step, the position of the second yoke in the circumferential direction relative to the lower mold is determined by making the second magnetic pole tooth contact the projecting part.
6. A torque detector comprising the yoke unit as recited in claim 1.
7. (canceled)
8. A torque detector comprising the yoke unit manufactured by the method as recited in claim 5.
9. An electrically-driven power steering device comprising the torque detector as recited in claim 6.
10. An electrically-driven power steering device comprising the torque detector as recited in claim 8.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A lithium secondary battery, comprising:
a cathode active material including a lithium-containing transition metal oxide capable of performing reversible storage and release of lithium ions;
an anode active material including graphitized carbon capable of performing reversible storage and release of lithium ions;
a porous separator; and
a non-aqueous electrolyte containing (i) a lithium salt, (ii) an electrolyte solution and (iii) an ammonium compound.
2. The battery according to claim 1, wherein the ammonium compound is one or more organic ammonium compounds selected from compounds represented by Formula (I):
R1\u2014CO2\u2212(NH4)+
wherein R1 is optionally substituted alkyl or optionally substituted aryl.
3. The battery according to claim 1, wherein the ammonium compound is one or more halogenated ammonium compounds selected from compounds represented by Formula (II):
A\u2212(NH4)+
wherein A is a halogen atom.
4. The battery according to claim 2, wherein the organic ammonium compound is ammonium acetate or ammonium benzoate.
5. The battery according to claim 3, wherein the halogenated ammonium compound is ammonium chloride or ammonium iodide.
6. The battery according to claim 1, wherein the content of the ammonium compound is in the range of 0.01 to 10% by weight, based on the total weight of the electrolyte.
7. The battery according to claim 1, wherein the lithium-containing transition metal oxide is selected from the group consisting of LiCoO2, LiNiO2, LiMn2O4 and LiNi1-XCoXO2.
8. The battery according to claim 1, wherein the graphitized carbon has a distance constant between crystal faces of a carbonaceous material, doo2 value of less than 0.338 nm, as measured by X-ray diffraction, and a specific surface area of less than 10 m2g, as measured by a BET method.
9. The battery according to claim 1, wherein the lithium salt is selected from the group consisting of LiClO4, LiCF3SO3, LiC4F9SO3, LiPF6, LiBF4, LiAsF6, LiN(C2FsSO2)2 and LiN(CF3SO2)2.
10. The battery according to claim 1, wherein the electrolyte solution is at least one selected from the group consisting of ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate (BC), vinylene carbonate (VC), diethyl carbonate (DEC), dimethyl carbonate (DMC), ethylmethyl carbonate (EMC), gamma-butyro lactone (GBL), sulfolane, methyl acetate (MA), ethyl acetate (EA), methyl propionate (MP) and ethyl propionate (EP).