摘要:
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.
摘要:
An aromatic polyimide film for producing an electro-conductive sealing element of a packaged semi-conductor device, has a thickness of 20 to 60 μm, a moisture vapor transmission coefficient of 0.05 to 0.8 g/mm/m2·24 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.
摘要:
An easily slidable polyimide film having a polyimide surface layer comprising a polyimide which is thermoplastic and has a glass transition temperature of 190–450° C., wherein there are dispersed in the polyimide of the polyimide surface layer, in a proportion of approximately 0.5–10 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 0.3–0.8 μm and a maximum size of no greater than 2 μm, in at least about 1 μm of the polyimide surface layer.
摘要:
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.
摘要:
An easily slidable polyimide film having a polyimide surface layer comprising a polyimide which is thermoplastic and has a glass transition temperature of 190-450° C., wherein there are dispersed in the polyimide of the polyimide surface layer, in a proportion of approximately 0.5-10 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 0.3-0.8 μm and a maximum size of no greater than 2 μm, in at least about 1 μm of the polyimide surface layer.
摘要:
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 ≧500 N/m and the polyimide film shows a light transmittance of ≧40% for a light of wavelength of 600 nm and a haze of ≧30% [the light transmittance and haze are values measured after the copper foil is removed by etching].
摘要:
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).
摘要:
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.
摘要:
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 ≧500 N/m and the polyimide film shows a light transmittance of ≧40% for a light of wavelength of 600 nm and a haze of ≦30% [the light transmittance and haze are values measured after the copper foil is removed by etching].
摘要:
A polyimide-copper composite laminate is composed of a metallic carrier having a thickness of 10-35 μm and a thin copper film having a thickness of 1-8 μm, and an intervening heat-resistant layer and an aromatic polyimide film directly fixed to the thin copper film without adhesive.