Abstract:
PROBLEM TO BE SOLVED: To provide a photosensitive resin composition having high plating resistance when a photosensitive film is formed, and to provide the photosensitive film using the composition. SOLUTION: The photosensitive resin composition contains (A) 100 parts by mass of an alkali soluble resin, and(B) 1 to 50 parts by mass of a photosensitive agent having a quinone diazide structure. The elastic modulus and the adhesion strength of the composition after heat treatment satisfy an expression (a):Y≥0.0004X, wherein Y represents an adhesion strength (N/mm) and X represents an elastic modulus (MPa) after the heat treatment. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a photosensitive ink which is excellent in developability and avoids warpage after curing and has flame retardancy, and a printed wiring board using the same. SOLUTION: When the photosensitive ink is applied to one surface of a polyimide film (thickness: 25 μm) such that a cured film has a thickness of 20±2 μm, the applied ink is baked in air at 120°C for 60 min and further baked at 180°C for 60 min to obtain a two-layer film including a cured film on one surface of the polyimide film, and the two-layer film is cut to dimensions of 5×5 cm, warpage of ends is ≤10 mm. When the photosensitive ink is applied to the other surface of the polyimide film opposite to the surface on which the cured film has been disposed by using the two-layer film such that a cured film has a thickness of 20±2 μm, and the applied ink is baked in air at 120°C for 60 min and further baked at 180°C for 60 min to obtain a three-layer film, the three-layer film shows VTM-0 in a flame retardancy test. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a positive photosensitive resin composition which exhibits a high residual film ratio and excellent residue removability in dry film shape, and a photosensitive film comprising the photosensitive resin composition. SOLUTION: The photosensitive resin composition comprises (A) an alkali-soluble polyimide containing ≥10 wt.% of a siloxane structure, (B) a photosensitive agent having a quinonediazide structure, and (C) a compound having an acid dissociation constant (pKa) at 25°C of 6-14. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an adhesive polyimide excellent in storage stability and soldering heat resistance during moisture absorption, and housing a low hygroscopic expansion coefficient. SOLUTION: The adhesive polyimide is an adhesive polyimide comprising a solvent soluble block polyimide compound containing an oligomer of an imide compound, an aromatic diamine and a tetracarboxylic acid dianhydride as components, wherein the oligomer of the imide compound contains a bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic acid dianhydride (A) and 3,5-diamino benzoic acid (B) as components, and the amount of component (B) is less than 9.9 wt.% based on the total amount of diamine and tetracarboxylic acid dianhydride, and has at least 80,000 of a weight average molecular weight. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a positive photosensitive resin composition which can be pressure-bonded to a substrate or the like, has flame retardancy and reduces warpage in dry film formation, and a photosensitive film comprising the photosensitive resin composition. SOLUTION: The photosensitive resin composition comprises (A) a polyimide, (B) a light-sensitive material and (C) a phosphoric ester compound. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for forming an electrode penetrating an integrated circuit chip from the surface to the rear surface in order to mount three or more integrated circuit chips directly on a circuit board while stacking. SOLUTION: A thin conductive semiconductor substrate is bored by etching and a photosensitive polyimide insulation film is deposited thereon by rotary coating. A pattern of holes of smaller diameter is then formed by exposure and development, the through hole is filled with a metallic material, and the rear surface of the substrate is ground to expose the metal thus forming a through electrode. The inventive through electrode has such a structure as a polyimide insulation layer is formed on the side face of a through hole made through a substrate of ground potential and the center of the hole is filled with a metallic material. Since a coaxial line structure is attained, a wide range characteristic impedance can be realized by controlling the thickness of the polyimide insulation film on the side face of the hole. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a Cu-Ni-organic electrodeposition thin film laminated structure deposited by film-depositing an organic electrodeposition thin film such as an electrodeposition polyimide thin film having excellent adhesiveness on a Cu base material and a method of depositing the same. SOLUTION: The Cu-Ni-organic electrodeposition thin film laminated structure is deposited by film-depositing the organic electrodeposition thin film through a Ni layer having ≥5 nm and