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1. 发明专利

JP2004152813A Semiconductor element and its fabricating process 审中-公开
公开(公告)号：JP2004152813A
公开(公告)日：2004-05-27
申请号：JP2002313571
申请日：2002-10-29
申请人： Japan Fine Ceramics Center , Toyota Motor Corp , トヨタ自動車株式会社 , 財団法人ファインセラミックスセンター
发明人： SAKAMOTO HIDEMITSU , MANABE AKIRA , NAKAMURA MASATERU , SHIBATA NORIYOSHI , TANI YUKARI
IPC分类号： H01L29/78
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor element exhibiting excellent high speed operability, and to provide its convenient fabricating process.
SOLUTION: The semiconductor element 10 comprises a 6H-SC substrate 11 of hexagonal system, and a 3C-SiC thin film 12 of cubic system wherein a gate oxide film 13 and a gate electrode 14 are provided on the film surface of the thin film 12 and a source 15 and a drain 16 are provided on the left and right of the thin film 12. Energy level of band gap is shifted between the 6H-SiC substrate 11 and the 3C-SiC thin film 12 due to difference of the crystal structure (hexagonal system and cubic system) wherein the conduction band of the substrate 11 is higher than that of the thin film 12 and the valence band of the substrate 11 is also higher than that of the thin film 12. Furthermore, conduction band of the thin film 12 is higher than the valence band of the substrate 11. Based on the characteristics of the band gap, electrons are made to exist in the conduction band of the thin film 12 on the lower energy level side whereas holes are made to exist in the conduction band of the substrate 11 on the higher energy level side.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2001040458A WEAR-RESISTANT SINTERED ALLOY AND MANUFACTURE THEREFOR 失效
公开(公告)号：JP2001040458A
公开(公告)日：2001-02-13
申请号：JP21505799
申请日：1999-07-29
申请人： TOYOTA MOTOR CORP , NIPPON FUNMATSU GOKIN KK
发明人： ANDO KIMIHIKO , MANABE AKIRA , AKIMOTO NAOMICHI , MAEJIMA TAKASHI , KOEDA KATSUMASA , ISHIHARA NAOTOSHI
IPC分类号： F01L3/02 , B22F3/26 , B22F5/00 , C22C33/02 , C22C38/00 , C22C38/56
摘要： PROBLEM TO BE SOLVED: To provide a wear-resistant sintered alloy having an improved wear resistance and a suppressed abrasiveness to a mating surface and a manufacturing method therefor. SOLUTION: The whole composition of a wear-resistant sintered alloy is, by wt., 1.5 to 7.0% Co, 2 to 15% Mo, 1 to 8% Cr, 1 to 8% Ni, 0.5 to 7% W, 0.8 to 2.5% C, 0.01 to 2% Si, and the balance Fe with inevitable impurities. The base composition is 2 to 15% Co, 2 to 10% Mo, 20% to 28% Mo, 10 to 30% Cr, 8 to 30% Ni, 10 to 25% W, 0.5 to 5.0% C, 0.5 to 5.0% Si, and the balance Fe with inevitable impurities. The hard particles disperse in the base by 2 to 40 wt.%.

3. 发明专利

JPH06220591A WEAR RESISTANT IRON-BASE SINTERED ALLOY AND ITS PRODUCTION 失效
公开(公告)号：JPH06220591A
公开(公告)日：1994-08-09
申请号：JP25870993
申请日：1993-10-15
申请人： TOYOTA MOTOR CORP
发明人： TAKAHASHI YOSHITAKA , MANABE AKIRA , KANEKO TADATAKA , OKAJIMA HIROSHI
IPC分类号： C22C33/02 , C22C38/00
摘要： PURPOSE:To produce an iron-base sintered alloy for valve seat excellent in wear resistance. CONSTITUTION:A powder mixture is prepared by mixing, by weight ratio, 2-30% of Ni-base alloy powder having a composition consisting of 5-20% Mo, 20-40% Cr, 10-20% W, and the balance Ni with inevitable impurities and 0.2-2% of graphite powder with an iron-base alloy powder having a composition consisting of, by weight ratio, 2-15% Co, 2-10%, preferably >3%-10%, Mo, and the balance Fe with inevitable impurities, which is compacted. Further, 0.2-2% of solid lubricant is mixed with the above, if necessary, and they are compacted. The resulting green compact is sintered at a temp. between 1323K and the melting point of the Ni-base alloy powder. Because alloy powders are used and matrix structure is sintered, the degree of homogenization of entering into solid solution of alloying elements in a matrix is increased and superior corrosion resistance, oxidation resistance, and wear resistance can be obtained with minimal alloy quantity, and further, wear resistance can be improved because Mo, Cr, and W in the Ni-base alloy powder combine with C to form carbides. Moreover, machinability can be improved by adding free cutting agent.

4. 发明专利

JPH03120301A POWDER METALLURGICAL METHOD FOR ALUMINUM ALLOY 失效
公开(公告)号：JPH03120301A
公开(公告)日：1991-05-22
申请号：JP25817289
申请日：1989-10-03
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： SUDO SHUNTARO , MANABE AKIRA , HAMAMOTO HIROSHI , KONDO MIKIO , ITO KAZUHIKO
IPC分类号： B22F3/14 , C22C1/04
摘要： PURPOSE:To manufacture a green compact made of Al alloy powder having high strength at a low cost by compacting the Al alloy powder having comparatively small spherical degree in a metallic mold to make this a preform and then, making the actual form under the specific temp. condition. CONSTITUTION:The Al alloy powder having =350 deg.C in the range of temp. at which sintering is not started, charged into the actual forming metallic die having temp. 0.75-1.25 times the preformed body temp. and pressurized for 5-30sec to manufacture the Al alloy green compact having high strength and >=0.97 ratio of the apparent density to true density without surface porosity at good yield of the powder raw material.

5. 发明专利

JPS6483640A MANUFACTURE OF SINTERED ALLOY HAVING EXCELLENT HIGH TEMPERATURE WEAR RESISTANCE 失效
公开(公告)号：JPS6483640A
公开(公告)日：1989-03-29
申请号：JP23850487
申请日：1987-09-22
申请人： TOYOTA MOTOR CORP , NIPPON FUNMATSU GOKIN KK
发明人： KADOTA YUKIO , MANABE AKIRA , ITO MASAO , MAEJIMA TAKASHI
IPC分类号： B22F3/10 , C22C33/02
摘要： PURPOSE:To easily manufacture a sintered alloy having excellent wear resistance by subjecting the molded body consisting of Cr alloy powder and Fe alloy powder to main sintering while melting partially in liquid phase and regulating its pore ratio to specific one. CONSTITUTION:The Cr alloy powder which is dispersed and burried into a matrix to form into hard grains and the Fe metallic powder contg. the compound having low melting point are mixed; and the mixture is subjected to compression molding. Said molded body is heated to partially produce a liquid phase in low melting point component and the molded body is subjected to main sintering. By this method, the sintered alloy having

6. 发明专利

JPS63154291A BRAZING FILLER METAL FOR SINTERED PARTS 失效
公开(公告)号：JPS63154291A
公开(公告)日：1988-06-27
申请号：JP1545887
申请日：1987-01-26
申请人： TOYOTA MOTOR CORP
发明人： KADOTA YUKIO , MANABE AKIRA
IPC分类号： B23K35/30 , C22C9/00 , C22C30/00
摘要： PURPOSE:To improve the quality of a joined part and to reduce the cost of joining by forming a brazing filler metal compsn. of specific ratios of Fe, Cr, Si, Bi, Cu, Mn, and Ni and incorporating a prescribed ratio of flux therein as necessary. CONSTITUTION:The brazing filler metal is formed by consisting the same, by weight, of 5-40% Fe and/or Cr, 1-5% Si and/or Bi, 20-65% Cu, 5-30% Mn, and >=20% Ni, and adding 1-6% flux thereto at need. Further, 5-30% Mn or 10-50% Cu is combined with the contents consisting of 5-50% Fe and/or Cr and 1-10% Si and/or Bi and the balance is composed of 1-6% Ni and flux. Since the Fe or Cr forms crystallized matter by reacting with the B and Si, the infiltration effect and erosion effect of the joint part are suppressed. the quality of the jointed part is thereby improved and the reduction of the joining cost is resulted from the decreased consumption of the brazing filler metal.

7. 发明专利

JPS6320432A PRODUCTION OF HIGH STRENGTH SINTERED MATERIAL 失效
公开(公告)号：JPS6320432A
公开(公告)日：1988-01-28
申请号：JP16616086
申请日：1986-07-15
申请人： TOYOTA MOTOR CORP
发明人： TAKAHASHI YOSHITAKA , MANABE AKIRA
IPC分类号： C22C33/02
摘要： PURPOSE:To obtain a high strength sintered material without requiring sintering at a high temp. by mixing Fe alloy powder with sintering activating powder, graphite powder and one or more among Ni powder, Cu powder and Sn powder, compacting the mixture and sintering it. CONSTITUTION:Fe alloy powder is mixed with 0.5-10wt% sintering activating powder prepd. by adding 0.5-7.0% C to powder having the same composition as the Fe alloy powder or similar in composition to the Fe alloy powder, 0.2-1.0% graphite powder and one or more among 1-4% Ni powder, 1-7% Cu powder and 1-6% Sn powder. The powdery mixture is compacted and sintered. Thus, a high strength sintered material can be produced without carrying out sintering at a high temp.

8. 发明专利

JPS62167864A HIGH-STRENGTH SINTERED FREE-CUTTING STEEL AND ITS PRODUCTION 失效
公开(公告)号：JPS62167864A
公开(公告)日：1987-07-24
申请号：JP942086
申请日：1986-01-20
申请人： TOYOTA MOTOR CORP
发明人： TAKAHASHI YOSHITAKA , MANABE AKIRA , SUDO SHUNTARO
IPC分类号： C22C33/02 , B22F1/00 , C22C38/00 , C22C38/60
摘要： PURPOSE:To obtain a titled free-cutting steel which has high strength and excellent machinability and is low in production cost by adding C-contg. iron powder for accelerating sintering, graphite powder and powder of one kind among MnS, S, Se, and MoS2 to iron powder or ferrous alloy powder and sintering the powder mixture. CONSTITUTION:0.5-8.0% iron powder for accelerating sintering including 0.5-6.7% C by weight, 0.3-1.1% graphite powder and the following powder for improving machinability are added to the iron powder or ferrous alloy powder consisting of Cr-Mn-Mo, etc., and the powder mixture is sintered: The powder for improving machinability is one kind of the powder among 0.1-0.6% MnS, 0.05-0.15% S, 0.05-0.2% Se, and 0.2-0.6% MoS2 (each % denotes the amt. to be added). The above-mentioned special sintering accelerator and sulfide are added to the sintering material powder and the powder is sintered in this invention and therefore, the high-strength sintered free-cutting steel having the above-mentioned characteristics is obtd.

9. 发明专利

JPS62164858A FERROUS SINTERED ALLOY FOR VALVE SEAT 失效
公开(公告)号：JPS62164858A
公开(公告)日：1987-07-21
申请号：JP689486
申请日：1986-01-16
申请人： TOYOTA MOTOR CORP
发明人： KADOTA YUKIO , MANABE AKIRA
IPC分类号： F01L3/02 , C22C33/02 , C22C38/00 , C22C38/30 , C22C38/60
摘要： PURPOSE:To produce a ferrous sintered alloy for a valve seat having excellent wear resistance by uniformly dispersing a specific amt. of alloy particles consisting of specific ratios of Cr, Co, W, Mo, Fe, and C into a Fe base essentially consisting of pearlite into which specific ratios of CaF2 and C are incorporated. CONSTITUTION:The alloy particles consisting, by wt, of 40-70% Cr, 5-30% Co, 5-20% W, 5-20% Mo, =1,000Hv. Such alloy particles are uniformly dispersed into the base essentially consisting of the pearlite contg. 0.2-3% 1 or 2 kinds of CaF2, MoS2 and MnS, 0.5-2% C and consisting of the balance Fe. The ferrous sintered alloy for the valve seat which has the high wear resistance of the alloy itself and is weakened in the attacking power to the mating valve is thus obtd.

10. 发明专利

JPS62146204A IRON-CARBON POWDER AND ITS PRODUCTION 失效
公开(公告)号：JPS62146204A
公开(公告)日：1987-06-30
申请号：JP28671785
申请日：1985-12-19
申请人： TOYOTA MOTOR CORP
发明人： TAKAHASHI YOSHITAKA , MANABE AKIRA , SUDO SHUNTARO
IPC分类号： B22F1/00
摘要： PURPOSE:To produce iron-carbon powder used as a mother alloy for accelerating the sintering of an iron-base material to be sintered by adding iron powder to Fe-C powder as a other alloy. CONSTITUTION:A molten steel consisting of C, inevitable impurities and the balance Fe is prepd. and atomized with an atomizing medium. The resulting Fe-C powder is heated to 730-1,020 deg.C and cooled to 300 deg.C at 5-150 deg.C/min cooling rate to regulate the Vickers hardness to =80%. Thus, iron-carbon powder consisting of 0.5-6.7wt% C,

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