Abstract:
PROBLEM TO BE SOLVED: To provide a flame retardant adhesive composition which forms an adhesive layer excellent in flame retardancy and also excellent in adhesiveness.SOLUTION: A flame retardant adhesive composition comprises an acrylic polymer, and a metal hydroxide having an average particle diameter of 10 μm or less and/or a hydrated metal compound having an average particle diameter of 10 μm or less. When the 180° peel adhesive force of an adhesive layer formed by a composition prepared by removing the metal hydroxide and the hydrated metal compound from the flame retardant adhesive composition is represented by an adhesive force A and the 180° peel adhesive force of an adhesive layer formed by the flame retardant adhesive composition is represented by an adhesive force B, a ratio of the adhesive force B to the adhesive force A (adhesive force B/adhesive force A) is 0.8 or more. The adhesive layer formed by the flame retardant adhesive composition has a flame retardancy of VTM-0 or VTM-1 in the flame retardancy test according to UL94 standards.
Abstract:
PROBLEM TO BE SOLVED: To provide an aqueous dispersion type tacky adhesive composition which can form a tacky adhesive layer that does not substantially contain an organic solvent, excels in coating appearance, and can maintain an adhesion property for a prolonged period.SOLUTION: The aqueous dispersion type tacky adhesive composition includes: an acrylic emulsion polymer (A); and a compound (B) which has a solubility in water (25°C) of at least 1 g/100 g, and has, in the molecule, at least two substituents bonded to the nitrogen atom represented by formula (1). In the formula, R represents one divalent group selected from a group consisting of a 1-10C straight chain or branched alkylene, phenylene, alkyl group-substituted phenylene, halogen-substituted phenylene, and heteroatom-containing alkylene.
Abstract:
PROBLEM TO BE SOLVED: To provide an active energy ray-curable pressure-sensitive adhesive for re-release, which has a small influence on an environment or a human body, can be easily handled, can largely change its pressure-sensitive adhesiveness before and after irradiation with an active energy ray, and can express high pressure-sensitive adhesiveness before the irradiation with the active energy ray and express high releasability after the irradiation with the active energy ray.SOLUTION: The active energy ray-curable pressure-sensitive adhesive for re-release includes an active energy ray-curable polymer (P), wherein the polymer (P) is obtained by causing an aqueous dispersion of a carboxyl group-containing polymer (A) and an oxazoline group-containing compound (B) which has an oxazoline group and a radical reactive carbon-carbon double bond to react with each other.
Abstract:
PROBLEM TO BE SOLVED: To provide a dicing die bond film having a dicing film and a die bond film which (1) ensures good holding power for a semiconductor wafer when it is diced, and good detachability of a semiconductor chip from a substrate regardless of the size or the thickness of the semiconductor wafer or the semiconductor chip, (2) has little impact on the environment or human health, and (3) can be handled easily.SOLUTION: A dicing die bond film 11 includes a dicing film having an adhesive layer 2 on a substrate 1, and a die bond film 3'. The adhesive layer contains a polymer (P) cured by UV-irradiation. The polymer (P) is obtained by a reaction of a polymer (A) composed of a constituent containing, as a main monomer, acrylic ester and a monomer containing a carboxyl group, and a compound (B) containing an oxazoline group which has an oxazoline group and a radical reactive carbon-carbon double bond. The die bond film contains epoxy resin.
Abstract:
PROBLEM TO BE SOLVED: To provide a laminated film for easily peeling a semiconductor chip with a die adhesive layer from an adhesive sheet in a pick-up step, with the die adhesive layer being prevented from contaminated. SOLUTION: The laminated film 1 has such configuration as a die adhesive layer 3 is laminated on an adhesive agent layer 2b of an adhesive sheet 2, and is used for a manufacturing step of a semiconductor device. The adhesive agent layer 2b of the adhesive sheet 2 contains water carriers, and the gel fraction of the adhesive agent layer 2b is 90 wt.% or higher. The adhesive agent layer 2b is the adhesive agent layer which has an acrylic polymer, whose main monomer component is acrylic acid alkyl ester represented by CH 2 =CHCOOR (R is alkyl group of carbon number 6-10), as base polymer. The percentage of the acrylic acid alkyl ester represented by the formula is preferred to be 50-99 mol% relative to total quantity of monomer component. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a thin adhesive tape having excellent fire retardancy, also with excellent adhesiveness.SOLUTION: An adhesive tape has an adhesive layer including: an acrylic polymer; and a metalhydroxide having an average particle diameter of 10 μm or smaller and/or a hydrated metal compound having an average particle diameter of 10 μm or smaller. A total content of the metalhydroxide having an average particle diameter of 10 μm or smaller and the hydrated metal compound having an average particle diameter of 10 μm or smaller is 20-330 pts.wt. to 100 pts.wt. of the acrylic polymer. Thickness of the adhesive tape is 70 μm or smaller. In a fire retardancy test of UL94 standard, the adhesive tape has fire retardancy of VTM-0 or VTM-1.
Abstract:
PROBLEM TO BE SOLVED: To provide a water-dispersion adhesive composition whose dispersion stability is excellent, wherein an adhesive sheet formed from the composition has excellent adhesiveness to rough surface and water resistance.SOLUTION: The adhesive composition comprises an aqueous dispersion liquid containing an aqueous solvent and an adhesive component dispersed in the aqueous solvent. The adhesive composition contains an acrylic polymer. The adhesive composition further contains a tackifier L having viscosity at 30°C of ≤2,000 Pa s. The adhesive composition further contains a surfactant S having an aryloxy group as a hydrophobic group and an anionic or nonionic hydrophilic group in the molecular structure. Here, the aryloxy group is a phenyloxy group having at least one substituent having an aromatic ring.
Abstract:
PROBLEM TO BE SOLVED: To provide a dicing die bond film which has a dicing film having an adhesive layer on a base material and a die bond film formed on the adhesive layer, and can exert good holding power and good detachability for a semiconductor wafer with good balance during dicing.SOLUTION: A dicing die bond film comprises a dicing film 11 having an adhesive layer 2 on a base material 1 and a die bond film 3' formed on the adhesive layer 2, the adhesive layer 2 contains a cured material of a polymer P by ultraviolet irradiation, a polymer A comprising monomer component containing an acrylic ester as a main monomer and an oxazoline group-containing monomer reacts with a carboxyl group-containing compound B containing a carboxyl group and radical reactive carbon-carbon double bond to obtain the polymer P, and the die bond film 3' contains an epoxy resin.
Abstract:
PROBLEM TO BE SOLVED: To provide a laminated film which is superior in dicing property, picking-up property, fouling preventive property and storage stability. SOLUTION: A laminated film 1 has a constitution that a die-adhering layer 3 is laminated on an adhesive layer 2b of an adhesive sheet 2; the adhesive layer of the adhesive sheet is formed of an adhesive composition containing a base polymer and a thermal crosslinking agent, and the adhesive layer is such that a gel fraction, before heating is less than 90 wt.% and the gel fraction after heating, is changed by 90 wt.% or more. As the thermal crosslinking agent, there is suitably used a thermal crosslinking agent where crosslinking-reactive functional groups are inactivated prior to heating; and at least two crosslinking-reactive functional groups in one molecule are capable of being activated by heating. As the thermal crosslinking agent, a blocked isocyanate is preferred. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a dicing/die-bonding film capable of easily separating a pressure-sensitive adhesive layer from a die adhesive layer, even when a semiconductor wafer is a thin and large size, making it unnecessary to stick both the layers again, after separation and having a high pickup efficiency. SOLUTION: In the dicing/die-bonding film, the pressure-sensitive adhesive layer of the dicing film is an active energy-ray curable type pressure-sensitive layer which contains a gas-generating agent in a ratio of 10 to 200 pts.wt. with respect to 100 pts.wt. of a base polymer which is the following acrylic polymer A. The acrylic polymer A has a composition, obtained by applying addition reaction of an isocyanate compound containing a carbon-carbon double bond to a polymer, based on a monomer composition that contains 50 wt.% or more of acrylic acid alkyl ester, in which the carbon number of an alkyl radical is 6 to 10, and 10 to 30 wt.% of a monomer including hydroxyl radicals and does not contain a monomer that contains carboxyl radicals at addition reaction of 50 to 95 mol% with respect to the monomer containing hydroxyl radicals. COPYRIGHT: (C)2010,JPO&INPIT