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1. 发明专利

JPH03180098A MANUFACTURE OF CERAMIC CIRCUIT BOARD 失效
公开(公告)号：JPH03180098A
公开(公告)日：1991-08-06
申请号：JP31929389
申请日：1989-12-08
申请人： FUJITSU LTD , FUJITSU SINTER KK
发明人： YAMADA YUJI , SATO KAZUAKI , SHIBAYAMA TAKESHI , SAKAMURA TOSHIHIRO , SAKAI TAKEAKI , SUZUKI HIRONOBU
IPC分类号： H05K3/40
摘要： PURPOSE:To form through-via conductors which do not have open-circuits and voids at accurate positions by a method wherein a number of through-holes are made by a laser process and filling material is solidified. CONSTITUTION:Through-hole 12 are made by a laser process at the required positions of an insulating substrate 11 made of baked ceramic. Metal films 13 are applied to the inner walls of the through-holes 12 and the surface layers 11a of the substrate 11. Then filling material 14 made of molten metal is put into the through-holes 12 and parts of the solidified filling material 14 protruding from the surface and rear of the substrate 11 and the metal films 13 on the surface layers 11a are removed by polishing to form through-via conductors 15 which provide electrical continuity between the surface and rear of the insulating substrate 11. Thus, by making the through-holes 12 by a laser process at the required positions of the insulating substrate 11 made of ceramic, the through-via conductors 15 can be formed at accurate positions and, as the through-via conductors 15 are composed of the filling material 14 and the metal films 13, open-circuits and voids in the through-via conductors 15 themselves can be completely avoided.

2. 发明专利

JPH02145233A MAGNESIUM COMPOSITE MATERIAL 失效
公开(公告)号：JPH02145233A
公开(公告)日：1990-06-04
申请号：JP29826588
申请日：1988-11-28
申请人： FUJITSU LTD , FUJITSU SINTER KK
发明人： HORIKOSHI EIJI , NAGASAWA YOSHIAKI , SUZUKI HIRONOBU
IPC分类号： B23P25/00 , C22C23/02 , C22C47/00
摘要： PURPOSE:To reduce the hardness of the part subjected to cutting by joining magnesium, aluminum and at least one kind of these alloys to the specified part of a magnesium composite material. CONSTITUTION:Mg - Al alloy powder 2a of 9wt.% aluminum Al is pressed by applying a powder press 3 on the green compact 1a of a boron B and magnesium Mg, B/Mg green compact interposing Mg - Al alloy green compact is formed, and Mg composite material consisting of B/Mg sinter body 1 and Mg - Al alloy sinter body 2 is obtd. by sintering/joining at the temp. of 580 deg.C. Thus, a magnesium, aluminum or these alloy of good cutting property containing no reinforcing substance are joined to the part subjected to cutting by a drill, tap, etc., and the working of this part is facilitated.

3. 发明专利

JPH07235153A MAGNETIC CIRCUIT STRUCTURE FOR DISC APPARATUS 失效
公开(公告)号：JPH07235153A
公开(公告)日：1995-09-05
申请号：JP2445394
申请日：1994-02-22
申请人： FUJITSU LTD , FUJITSU SINTER KK
发明人： OGAWA YOSHINORI , TOCHIYAMA KAZUNORI , SATO YOSHIHIRO , SUZUKI HIRONOBU
IPC分类号： G11B21/02 , G11B5/55 , H02K1/17 , H02K41/035
摘要： PURPOSE:To obtain a magnetic circuit structure for a disc apparatus which can be manufactured inexpensively. CONSTITUTION:A magnetic circuit includes a main yoke 50 manufactured by layering a plurality of rolled steel plates 52 and caulking the plates each other. The magnetic circuit further includes an inner magnet 54 set to the main yoke 50, an outer magnet 56 and a side yoke 58. Both ends of the inner magnet 54 butt against a pair of step differences 51 formed in the main yoke 50 and both ends of the outer magnet 56 butt against a pair of step differences 53 formed in the main yoke 50. The inner magnet 54 is prevented from moving in a vertical direction owing to a pair of retainer plates 60, 62 fixed to the main yoke. Similarly, the outer magnet 56 is prevented from moving in a vertical direction by a pair of retainer plates 64, 66 fixed to the main yoke.

4. 发明专利

JPS6372803A PRODUCTION OF IRON-BASE SINTERED PARTS 失效
公开(公告)号：JPS6372803A
公开(公告)日：1988-04-02
申请号：JP21616486
申请日：1986-09-12
申请人： FUJITSU LTD , FUJITSU SINTER KK
发明人： YAMAMOTO KAZUJI , SUZUKI HIRONOBU
IPC分类号： B22F3/10 , C22C33/02
摘要： PURPOSE:To produce a sintered member at a low cost without carrying out a sintering stage by forming a green compact in a forming stage and passing it through a steam blackening stage to form an oxide film on the green compact optionally after dewaxing and to carry out bonding and solidification. CONSTITUTION:When an iron-base sintered member is produced, iron powder 1 is mixed with a lubricant 2 in a mixing stage I and a green compact 3 of the mixture is formed in a forming stage II. The green compact 3 is then passed through a steam blackening stage III, where it is dewaxed by preheating in a preheating part (a) and treated at a low temp. in a treating part (b) by feeding steam to form an oxide film 5 on the green compact 3. The green compact 3 having the oxide film 5 is cooled in a cooling part (c) to produce a sintered member 4'. The whole surface of the green compact 3 is coated with the oxide film 5 and the particles in the surface layer are bonded together and solidified, so a sintering stage is made unnecessary to shorten producing stages. A low-cost member can be provided to a field where very high strength is not required.

5. 发明专利

JPH02239696A MANUFACTURE OF MULTILAYER SUBSTRATE 失效
公开(公告)号：JPH02239696A
公开(公告)日：1990-09-21
申请号：JP6155289
申请日：1989-03-14
申请人： FUJITSU LTD , FUJITSU SINTER KK
发明人： YAMADA YUJI , SATO KAZUAKI , SHIBAYAMA TAKESHI , SAKAMURA TOSHIHIRO , SAKAI TAKEAKI , SUZUKI HIRONOBU
IPC分类号： H05K3/46
摘要： PURPOSE:To improve the quality by making a through hole by laser beam machining in a multilayer substrate formed by lamination and firing of green sheets, forming a metal layer on the inner wall of said through hole, and pouring molten metal into the through hole to form a through pier which connects ceramic substrates. CONSTITUTION:A multilayer substrate 1 comprising a plurality of ceramic substrates 2 laminated is formed by lamination and of green sheets. A through hole 3 is made in the specific part of the multilayer substrate 1 by laser beam machining and a metal layer 4 is formed on the inner wall 3A of the through hole 3 and surface layers 1A. A through pier 6 to connect for electric conduction the laminated layers of the ceramic substrates 2 is formed by pouring molten metal 14 into the through hole 3 having the metal layer 4 on the inner wall thereof. Therefore, the molten metal 14 is easily poured and securely fused together with the metal layer 4. Thereby the quality improves.

6. 发明专利

JPH03203288A FORMATION OF VIA 失效
公开(公告)号：JPH03203288A
公开(公告)日：1991-09-04
申请号：JP34408089
申请日：1989-12-28
申请人： FUJITSU SINTER KK
发明人： SUZUKI HIRONOBU , KUWAOKA MASAO , EJIRI WATARU , FURUSAWA TAKASHI , SAKAI TAKEAKI
IPC分类号： H05K3/40 , H05K3/26
摘要： PURPOSE:To prevent a gap at the interface of a via from being produced and to prevent the via from falling off by a method wherein a particle of a prescribed diameter is sprayed by using the compressed air of a prescribed pressure and a conductive material and a metal film which have adhered to the surface and the rear of a ceramic substrate are removed before a polishing process. CONSTITUTION:After a melting and immersion process, a metal film 3 and a conductive material 4 are removed by a removal process in which a particle 5, of a prescribed particle diameter D, composed of a hard material crashes against the surface and the rear 1A, 1B of a ceramic substrate 1 by blowing a gas of a prescribed pressure P; a polishing process is executed. The metal film 3 and the conductive material 4 are removed while the particle 5 crashes; the metal film 3 and the conductive material 4 are removed actually by plastic deformation and fracture; the conductive material 4 is removed be exerting a tensile stress and a shearing stress on a worked face. Thereby, it is possible to prevent a gap from being produced between a via 6 and a through hole 2 and to prevent the via 6 from falling off.

7. 发明专利

JPH03211896A FORMING METHOD OF VIA 失效
公开(公告)号：JPH03211896A
公开(公告)日：1991-09-17
申请号：JP784090
申请日：1990-01-17
申请人： FUJITSU SINTER KK
发明人： KUWAOKA MASAO , SUZUKI HIRONOBU , EJIRI WATARU , FURUSAWA TAKASHI , SAKAI TAKEAKI
IPC分类号： H05K3/40
摘要： PURPOSE:To prevent a lost via and generation of a void and to improve quality by forming a film on a ceramic board having a through hole, infiltrating a conductive material into the hole to form the via. CONSTITUTION:A ceramic board 1 formed with a through hole 2 is coated ceramics by a CVD method to form a coating film 3, and a conductive material 4 containing activated metal is infiltrated into the hole 2 to form a via. Accordingly, the adhesive properties of the inner periphery of the hole 2 to the material 4 to be filled are increased, and the film 3 having high hermetical sealability with a pinhole or the like is formed. Thus, removal of the via is eliminated, generation of void is obviated, and its quality is improved.

8. 发明专利

JPH0595663A VOICE COIL MOTOR 失效
公开(公告)号：JPH0595663A
公开(公告)日：1993-04-16
申请号：JP25217591
申请日：1991-09-30
申请人： FUJITSU SINTER KK
发明人： SUZUKI HIRONOBU
IPC分类号： H02K33/18
摘要： PURPOSE:To reduce the variations of the torque constant of a voice coil motor, which drives the magnetic head of a magnetic disc, etc., and improve its accuracy, by absorbing the variations of the magnetic performance of a permanent magnet. CONSTITUTION:A voice coil motor, wherein a yoke part 2, on which a permanent magnet 21 is mounted opposing to a voice coil part 11 of an oscillating arm 1, is formed with a movable yoke part 22 and a fixed yoke part 23, and the permanent magnet 21 fastened on the movable yoke part 22 is made movable by the yoke part 22.

9. 发明专利

JPH03178196A FORMATION OF VIA IN CERAMIC CIRCUIT BOARD 失效
公开(公告)号：JPH03178196A
公开(公告)日：1991-08-02
申请号：JP31651689
申请日：1989-12-07
申请人： FUJITSU SINTER KK
发明人： SUZUKI HIRONOBU , KUWAOKA MASAO , EJIRI WATARU , YOSHIZAWA TAKASHI , SAKAI TAKEAKI
IPC分类号： H05K3/40 , H05K3/46
摘要： PURPOSE:To suppress the expansion of a gas body and obtain a highly reliable via by performing metal infiltrating works in a pressurized atmosphere. CONSTITUTION:A via is formed by making a molten metallic material 5 to flow into a through hole 3 after a plated layer 4 is formed on the inner surface of the holes bored through a multilayered ceramic substrate 2 formed by piling up and sintering green sheets 1 or a single-layer ceramic substrate formed by sintering a green sheet. When the via is formed, the infiltration of the metallic material 5 into the hole 3 is performed in the atmosphere of a high-pressure inert gas. Therefore, the expansion, etc., of the plated layer 4 associated with the metal infiltrating work can be suppressed and a via having a stable quality can be obtained.

10. 发明专利

JPH11134054A ANTI-SKID OPERATING PEDAL 失效
公开(公告)号：JPH11134054A
公开(公告)日：1999-05-21
申请号：JP29996697
申请日：1997-10-31
申请人： FUJITSU SINTER KK
发明人： SUZUKI HIRONOBU
IPC分类号： B60K23/02 , B60K26/02 , B60T7/06 , G05G1/48 , G05G1/483 , G05G1/16
摘要： PROBLEM TO BE SOLVED: To provide an operating pedal, which hardly slips even when a sole is made with water by rain or the like, by composing the anti-skid operating pedal of a porous anti-skid member, which is hard and has water permeability, formed by sintering powder. SOLUTION: An anti-skid member 3 has water permeability for absorbing moisture on a wet sole 5, on its surface, ruggedness is formed so as to hardly slip it even in the case of contact with the sole 5, and the powder is sintered. This sintered anti-skid member 3 is fixed with a pedal 1 by screwing or adhesive agent. In such a case, since an irregular surface formed from powder exists on the surface of the anti-skid member 3, a friction coefficient is high, and this surface plays the role for satisfactorily preventing skid to the contact with the sole 5. Therefore, concerning this anti-skid member 3, its surface is made coarse, an anti-skid effect can be expected with that surface itself and further, prescribed water permeability or absorbing performance can be presented by internally forming a lot of holes mutually through the member.

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