Patents by Inventor Masanaru Hasegawa
Masanaru Hasegawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7059039Abstract: A method for producing printed wiring boards comprises the steps of perforating through holes at predetermined positions in an adhesive insulator sheet, filling the through holes with a conductive material such as a conductive paste or metal balls, transferring conductive wiring patterns that have been formed on surfaces of releasable supporting sheets onto the surfaces of the adhesive insulator sheet by heat and pressure. Simultaneously, interlayer via-connections are performed by means of the conductive material filled into the through holes.Type: GrantFiled: January 21, 2004Date of Patent: June 13, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahide Tsukamoto, Masanaru Hasegawa, Hideo Hatanaka
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Patent number: 6780493Abstract: In a wiring board, predetermined wiring patterns which are formed on both sides of an insulation substrate are electrically connected by an electrically conductive material provided in through holes formed through the insulation substrate. The insulation substrate is composed of a resin impregnated fibrous sheet and a heat resistant film. The present invention solves the problems of the wiring board which are caused by irregularities on the surface of the resin impregnated fibrous sheet. The problems include insufficient adhesion strength between the wiring pattern and the insulation substrate or the limitation of fineness of the wiring pattern due to the irregularities on the surface of the printed wiring board which are formed upon the thermocompression bonding process.Type: GrantFiled: October 25, 2001Date of Patent: August 24, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Osamu Noda, Hideo Hatanaka, Kazunori Sakamoto, Masanaru Hasegawa
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Publication number: 20040148770Abstract: A method for producing printed wiring boards comprises the steps of perforating through holes at predetermined positions in an adhesive insulator sheet, filling the through holes with a conductive material such as a conductive paste or metal balls, transferring conductive wiring patterns that have been formed on surfaces of releasable supporting sheets onto the surfaces of the adhesive insulator sheet by heat and pressure. Simultaneously, interlayer via-connections are performed by means of the conductive material filled into the through holes.Type: ApplicationFiled: January 21, 2004Publication date: August 5, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Masahide Tsukamoto, Masanaru Hasegawa, Hideo Hatanaka
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Patent number: 6703565Abstract: A printed wiring board includes at least one insulator sheet having through holes filled with conductive material and a conductive wiring pattern. The wiring pattern is embedded in the insulator sheet so that an upper surface of the wiring pattern and surrounding portions of the insulator sheet form a flat surface. The insulator sheet may be made from a glass-epoxy prepreg or of a polyester or polyimide sheet coated with an adhesive or glue. The wiring pattern can be transferred to the insulator sheet from a surface of a releasable supporting sheet.Type: GrantFiled: October 11, 2000Date of Patent: March 9, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahide Tsukamoto, Masanaru Hasegawa, Hideo Hatanaka
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Publication number: 20020045394Abstract: In a wiring board, predetermined wiring patterns which are formed on both sides of an insulation substrate are electrically connected by an electrically conductive material provided in through holes formed through the insulation substrate. The insulation substrate is composed of a resin impregnated fibrous sheet and a heat resistant film. The present invention solves the problems of the wiring board which are caused by irregularities on the surface of the resin impregnated fibrous sheet. The problems include insufficient adhesion strength between the wiring pattern and the insulation substrate or the limitation of fineness of the wiring pattern due to the irregularities on the surface of the printed wiring board which are formed upon the thermocompression bonding process.Type: ApplicationFiled: October 25, 2001Publication date: April 18, 2002Inventors: Osamu Noda, Hideo Hatanaka, Kazunori Sakamoto, Masanaru Hasegawa
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Patent number: 6195882Abstract: A method for producing printed wiring boards comprises the steps of perforating through holes at predetermined positions in an adhesive insulator sheet, filling the through holes with a conductive material such as a conductive paste or metal balls, transferring conductive wiring patterns that have been formed on surfaces of releasable supporting sheets onto the surfaces of the adhesive insulator sheet by heat and pressure. Simultaneously, interlayer via-connections are performed by means of the conductive material filled into the through holes.Type: GrantFiled: September 5, 1997Date of Patent: March 6, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahide Tsukamoto, Masanaru Hasegawa, Hideo Hatanaka
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Patent number: 6083426Abstract: A conductive paste having excellent printing properties, which can be used for manufacturing heat-resistant conductors and resistive elements, is described. Such a conductive paste can be obtained by preparing as a binder a polyimide precursor whose weight average degree of polymerization (n) ranges from 5 to 20, and mixing it with a solvent and a conductive powder. The polyimide precursor preferably is included in the range from 50 to 80 weight parts to 100 weight parts of the solvent. A polar solvent, or a mixed solvent including a polar solvent and a nonpolar solvent can be used. A preferable mixed solvent is a mixture of N-methyl-2-pyrrolidone and diethylene glycol dimethyl ether, in which the mixing volume ratio is preferably ranging from 2:8 to 9:1, more preferably, 2:8 to 3:7.Type: GrantFiled: June 8, 1999Date of Patent: July 4, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yukihiro Shimasaki, Yusuke Ozaki, Masanaru Hasegawa, Toshiyuki Kitagawa
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Patent number: 6015872Abstract: To address the problem of difficulty of making compatible flame retarding property and electrical and mechanical characteristics in conventional printed interconnection substrates, the present invention employs, in a substrate for printed circuit board of which the insulating material comprises a thermosetting resin composition comprising an epoxy resin main component and a curing agent, an epoxy resin containing a brominated phenol novolac type epoxy resin having a biphenyl skeleton as the main component or a curing agent containing a brominated phenol novolac type curing resin. It provides a substrate for printed circuit board which has an extremely high flame retarding property and a superior heat resistance and humidity resistance, as well as a high insulating reliability and a superior high frequency characteristic.Type: GrantFiled: May 20, 1998Date of Patent: January 18, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiro Kawakita, Masanaru Hasegawa, Kazunori Sakamoto, Hideo Hatanaka
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Patent number: 4808437Abstract: By polishing a surface of a magnetic layer of magnetic recording medium in a direction which coincides with a track angle defined during the recording and reproducing thereof, drop out is decreased and electromagnetic characteristics are improved.Type: GrantFiled: January 6, 1988Date of Patent: February 28, 1989Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Kisoda, Hiroshi Suzuki, Tomiharu Hosaka, Masanaru Hasegawa
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Patent number: 4775595Abstract: In a magnetic recording medium such as VTR tape, a magnetic layer coated on a non-magnetic substrate comprises a binder of polyurethane resin of a reaction products among etheralcohol, polyesterpolyol, diisocyanate compound and silicon compound represented by the following general formula: ##STR1## (R: alkyl group, n: 1 or larger integer) and ferromagnetic powder dispersed in said binder; and the recording medium has very low friction coefficient, high C/N value and high durability without increase of amount of conventional lubricant or anti-abrasion agent in the magnetic layer.Type: GrantFiled: April 21, 1987Date of Patent: October 4, 1988Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Masanaru Hasegawa
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Patent number: 4026703Abstract: An electrophotographic photoreceptor for producing an electrostatic latent image on the top layer thereof which comprises from the bottom up:A. a substrateB. a layer of metallic palladium having a thickness of from 5A to 1000A,c. a layer including vitreous selenium having a thickness of from 0.05 to 3 microns andD. a top layer including polyvinyl carbazole having a recurring unit of the formula: ##STR1## wherein X is a member selected from a group consisting of hydrogen, halogen, nitro, alkyl, aryl, alkyl aryl, amino and alkylamino.Type: GrantFiled: March 26, 1975Date of Patent: May 31, 1977Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshiki Hayashi, Masanaru Hasegawa, Takeo Fusayama, Kazuhiko Kosuge, Kenji Hayashi