Abstract:
PROBLEM TO BE SOLVED: To provide a composition capable of obtaining a coated film having advantageous viscosity stability and advantageous fluidity during the processing, having advantageous shape retentivity after the processing, having advantageous drying property in a temperature range in which a conductive layer is not degraded during the drying, and being excellent in the adhesion strength with a metal-polyimide, flame retardancy, heat resistance, flexibility, mechanical physical property, and chemicals resistance after the drying. SOLUTION: This composition is a composition comprising (A) a polyimide and (B) a solvent mixture of two or more types of solvents, in which the compatibilization parameter of the solvent mixture of two or more types of solvents is 9 to 14. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a photosensitive resin composition having flame retardancy and low warpage properties in forming into the coverlay of an FPC, without deteriorating flexibility and bendability, wherein it is difficult for the conventional photosensitive resin compositions to have advantages. SOLUTION: The photosensitive resin composition includes a component (A), a component (B) and a component (C). The component (A) is a soluble polyimide, the component (B) is a quinonediazide compound, and a specific compound having an isocyanuric acid ring is used as the component (C), so that the photosensitive resin composition, having flame retardancy and low warpage properties in forming into the coverlay of an FPC without deteriorating flexibility and bendability, is provided. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a positive photosensitive resin composition excelling in lamination property, close contact property with metallic foil and strength-elongation and having high sensitivity, and a flexible printed wiring board using the same. SOLUTION: A photosensitive resin composition contains (A) soluble polyimide with a siloxane skeleton as a component and (B) a compound represented by a formula (1): Qn-X as a component, wherein n-number of Q bonded to X is 1,2-naphtoquinone-diazido-5-sulfonate group or hydrogen, at least one is 1,2-naphtoquinone-diazido-5-sulfonate group, n is a positive real number and represents the average number of Q bonded to X, X is a straight chain, branch chain, cyclic chain or aromatic hydrocarbon chain with a molecular weight of 300 or more. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a photosensitive cover lay film having excellent mechanical properties. SOLUTION: The present invention relates to a resin composition containing a resin (A) and a plasticizer (B), characterized in that, when only the plasticizer (B) is heated, the heat-generation at starting temperture is T1(°C) and, when a composition (composition (a)) which is a mixture of the resin (A) and the plasticizer (B) is heated, the heat generation starting temparature is T2(°C) and a glass transition temperature of the resin composition is T3(°C), no heat generation is observed when the above composition (composition (a)) is heated, or the composition satisfies formula (1): T1+15°C COPYRIGHT: (C)2009,JPO&INPIT