Ube Industries, Inc.

Nec Corporation

Matsushita Electric Industrial Co., Ltd.

Tdk Corporation

Nippon Steel Corporation

Tosoh Corporation

Japan Energy Corporation

Seisan Kaihatsu Kagaku Kenkyusho

Seiko Epson Corporation

Toyo Boseki Kabushiki Kaisha

Kanegafuchi Chemical Industry Co., Ltd.

Toshihiko Anno

Hiroaki Yamaguchi

Toshiyuki Nishino

Kohji Narui

Toshio Takada

Hidefumi Yamamoto

Teruya Shinjo

Shozo Katsuki

Masafumi Hashimoto

Nobuyuki Yamamoto

Tsutomu Nishiwaki

Masami Murai

Osamu Nakayama

Tomohiko Yamamoto

Hideki Ozawa

Takuji Takahashi

Takeshi Uekido

Kazuo Hashimoto

Hiroyuki Ikeuchi

Yasuhiro Nagoshi

Masakatsu Kimura

Takeru Fujinaga

Hideharu Watakabe

Takashi Amane

Yujiro Noda

In manufacture of a polyimide film, self-supporting film is heated with both ends in a width direction held and carried by the tenter apparatus. The tenter apparatus has a guide member placed on each side of a carry path for the self-supporting film and a pair of tenter chains each moved along the guide member and each including a film holding mechanism for holding an edge portion of the self-supporting film. The tenter chain has a rotating body supported rotatably around a shaft member extending in a direction in parallel with a carry face of the self-supporting film and perpendicular to a longitudinal direction of the guide member for movably supporting the tenter chain. The shaft member is directly or indirectly fixed to a member identical to a member to which the film holding mechanism is fixed.

Method of manufacturing polyimide film and tenter apparatus

An adhesion-enhanced polyimide film which includes a core layer composed of a polyimide (a) having high rigidity and a low linear expansion coefficient, at least one side of which has a thin-layer formed by heating a coated layer including a heat-resistant surface treatment agent and a polyimide precursor which yields a highly heat-resistant amorphous polyimide (B).

Adhesion-enhanced polyimide film, process for its production, and laminated body

A copper-clad laminate is composed of a copper foil and an aromatic polyimide film placed thereon, in which the copper foil is bonded to the polyimide film at a bonding strength of &#x2267;500 N/m and the polyimide film shows a light transmittance of &#x2267;40% for a light of wavelength of 600 nm and a haze of &#x2267;30% [the light transmittance and haze are values measured after the copper foil is removed by etching].

Copper-clad laminate

An easily slidable polyimide film having a polyimide surface layer comprising a polyimide which is thermoplastic and has a glass transition temperature of 190&#x2013;450&#xb0; C., wherein there are dispersed in the polyimide of the polyimide surface layer, in a proportion of approximately 0.5&#x2013;10 mass % based on the polyimide of the polyimide surface layer, wholly aromatic polyimide particles made of a polyimide comprising at least 80 mass % of a pyromellitic acid component and a p-phenylenediamine component, and having a median size of 0.3&#x2013;0.8 &#x3bc;m and a maximum size of no greater than 2 &#x3bc;m, in at least about 1 &#x3bc;m of the polyimide surface layer.

Easily slidable polyimide film and substrate employing it

An aromatic polyimide film for producing an electro-conductive sealing element of a packaged semi-conductor device, has a thickness of 20 to 60 &#x3bc;m, a moisture vapor transmission coefficient of 0.05 to 0.8 g/mm/m&#xb7;24 hrs, a water absorption ratio of 2.0% or less, and an elastic modulus in tension of 5,000 MPa or more, in which a surface of the polyimide film has been treated with reduced-pressure plasma discharge.

Aromatic polyimide film for electro-conductive sealing element of packaged semi-conductor device

A method of surface treating a polyimide film to impart improved adhesion to metal which comprises treating the surface of a polyimide film having a biphenyltetracarboxylic acid component by contact to a solution containing potassium permanganate and/or sodium permanganate and potassium hydroxide and/or sodium hydroxide and treating said surface with an acid.

Method of making a polyimide film having a thin metal layer

A metal film/aromatic polyimide film laminate is composed of a composite aromatic polyimide film and a metal film, in which the composite aromatic polyimide film is composed of an aromatic polyimide substrate film having a linear expansion coefficient of 5&times;10 to 30&times;10 cm/cm/&deg; C. in the temperature range of 50-200&deg; C. (measured in machine direction), and a thin aromatic polyimide layer of polyimide prepared from a carboxylic acid component comprising a mixture of 3,3&prime;,4,4&prime;-biphenyltetracarboxylic dianhydride and 2,3,3&prime;,4&prime;-biphenyltetracarboxylic dianhydride in a molar ratio of 50:50 to 90:10 and an aromatic diamine component composed of 1,3-bis(4-aminophenoxy)benzene or a mixture of 1,3-bis(4-aminophenoxy)benzene and p-phenylenediamine and/or diaminodiphenyl ether in a molar ratio of 10/90 or more. Tg of the thin polyimide layer is 210-310&deg; C. The metal film is fixed to the thin polyimide layer at a 90&deg; peel resistance of 0.5 kg/cm or higher, while the thin polyimide layer is bonded to the substrate film at a 90&deg; peel resistance higher than that between the metal film and the thin layer.

Metal film/aromatic polyimide film laminate

The present invention provides a piezoelectric film element with improved adhesion between a first protective film and a substrate. This invention also provides a method of manufacturing a piezoelectric film element, which makes it possible to selectively form, by a hydrothermal synthesis, a piezoelectric film with excellent piezoelectric properties in a specified area. This piezoelectric element comprises, over a substrate 12: a piezoelectric film; a common electrode and an individual electrode located to hold the piezoelectric film in between; a first protective film 14 which is formed over almost the entire surface of the substrate 12 and which protects the substrate 12 to avoid the formation of the piezoelectric film directly over the substrate 12; and a base film 16 which is formed over the first protective film 14 in the area for forming the piezoelectric film, and which functions as a base when the piezoelectric film is caused to grow to be formed. The piezoelectric film is formed over the base film 16.

Piezoelectric film element and manufacturing method thereof, and ink jet

In a heat-resistant aromatic polyimide/metal (or metal oxide) composite sheet composed of an aromatic polyimide film and a metal or metal oxide layer arranged on the film, the polyimide film is composed of an aromatic polyimide resin and an Al-containing material dispersed in the polyimide resin in an amount of 1 to 1,000 ppm per the amount of polyimide film, and the metal or metal oxide layer is formed on the polyimide film via no adhesive.

Aromatic polyimide film having improved adhesion

A magnetoresistance effect element having a substrate, a buffer layer of a metal selected from the group consisting of chromium, tungsten, titanium, vanadium, manganese and their alloys which is formed on the substrate, and at least two magnetic thin layers which are laminated with interposing a non-magnetic thin layer therebetween on the metal thin layer, wherein adjacent magnetic thin layers through the non-magnetic thin layer have different coercive forces. This magnetoresistance effect element has an increased magnetoresistance ratio.

Magnetoresistance effect element

There is provided a magnetoresistance effect element comprising a substrate and at least two magnetic thin layers which are laminated with interposing a non-magnetic thin layer therebetween on said substrate, wherein adjacent magnetic thin layers through the non-magnetic thin layer have different coercive forces, characterized in that a metal thin film is provided in an interface between at least one of the magnetic layers and the non-magnetic layer which is adjacent thereto, and the metal thin film is made of a substance which is different from that of the adjacent non-magnetic layer.

Growing community of inventors

Yamaguchi, Japan

Toshihiko Anno