Abstract:
A composite sheet (1) for forming a protective film which is provided with an adhesive sheet (2) formed by laminating an adhesive layer (22) on one surface of a base material (21), and a protective-film forming film (3) laminated on the adhesive layer (22) side of the adhesive sheet (2), wherein the adhesive sheet (2) does not have a through hole penetrating the adhesive sheet (2) in the thickness direction, and the light transmittance at a wavelength of 532 nm of the adhesive sheet (2), measured using an integrating sphere, is from 25 to 85%.
Abstract:
Provided is a sheet 2 for forming a protective film including a protective film-forming film 1 of which the light transmittance at a wavelength of 1600 nm is 25% or greater, and light transmittance at a wavelength of 550 nm is 20% or less, and a release sheet 21 which is laminated on one or both surfaces of the protective film-forming film 1. According to such a sheet 2 for forming a protective film, cracks existing in a workpiece or a manufactured product obtained by processing the workpiece can be inspected and a protective film in which grinding marks existing in the workpiece or the manufactured product are not visually recognized can be formed.
Abstract:
A protective film-forming film is provided for forming a protective film which protects a metal film provided on a back surface of a semiconductor chip and is not likely to peel off from the metal film even after undergoing a history of temperature changes. This protective film-forming film is formed of a protective film-forming composition to which a coupling agent having a thiol group or a protected thiol group is added.
Abstract:
A composite sheet (1) for forming a protective film, including an adhesive sheet (2) formed by laminating an adhesive layer (22) on one surface of a base material (21), and a protective-film forming film (3) laminated on the adhesive layer (22) side of the adhesive sheet (2), wherein the adhesive sheet (2) does not have a through hole penetrating through the adhesive sheet (2) in the thickness direction, and the light transmittance of the adhesive sheet (2) at a wavelength of 532 nm which is measured using an integrating sphere is from 75 to 85%.According to this composite sheet (1) for forming a protective film, while using an adhesive sheet having no through holes, it is still possible to suppress the generation of a gas reservoir between the adhesive sheet and the protective-film forming film (protective film) when laser printing is performed on the protective-film forming film (protective film).
Abstract:
A protective film forming film 1 is provided in which the product of the breaking stress (MPa) measured at a measurement temperature of 0° C. and the breaking strain (unit: %) measured at a measurement temperature of 0° C. in at least one of the protective film forming film 1 and a protective film formed from the protective film forming film 1 is in a range of 1 MPa·% to 250 MPa·%. According to such a protective film forming film 1, the protective film forming film 1 or the protective film formed from the protective film forming film 1 can be suitably divided in an expanding process performed on a workpiece when the workpiece is divided to obtain a work product.
Abstract:
Provided is a sheet 2 for forming a protective film including a protective film-forming film 1 of which the light transmittance at a wavelength of 1600 nm is 25% or greater, and light transmittance at a wavelength of 550 nm is 20% or less, and a release sheet 21 which is laminated on one or both surfaces of the protective film-forming film 1. According to such a sheet 2 for forming a protective film, cracks existing in a workpiece or a manufactured product obtained by processing the workpiece can be inspected and a protective film in which grinding marks existing in the workpiece or the manufactured product are not visually recognized can be formed.
Abstract:
A protective film forming film 1 is provided in which the product of the breaking stress (MPa) measured at a measurement temperature of 0° C. and the breaking strain (unit: %) measured at a measurement temperature of 0° C. in at least one of the protective film forming film 1 and a protective film formed from the protective film forming film 1 is in a range of 1 MPa·% to 250 MPa·%. According to such a protective film forming film 1, the protective film forming film 1 or the protective film formed from the protective film forming film 1 can be suitably divided in an expanding process performed on a workpiece when the workpiece is divided to obtain a work product.
Abstract:
The invention relates to a peel detection label that is a laminate including a support, a pattern layer formed in a part of the surface of the support, and a pressure-sensitive adhesive laminate having at least a low modulus layer (X), a high modulus layer (Y) and a pressure-sensitive adhesive layer (Z) in that order, in which the low modulus layer (X has a surface in contact with the support and the pattern layer and a surface in contact with the high modulus layer (Y), and satisfies the following requirement (1): Requirement (1): when the pressure-sensitive adhesive layer (Z) of the peel detection label is attached to an adherend and then the peel detection label is peeled off from the adherend, the maximum vertical tensile stress applied to an element of the low modulus layer (X) that is located closest to the support is 0.19 MPa or more when analyzed by a finite element method using Abaqus.
Abstract:
A protective film-forming composite sheet 10 comprises a pressure sensitive adhesive sheet 16 in which a pressure sensitive adhesive layer 12 is provided on a base material 11, a protective film-forming film 13, and a release film 14. When α (mN/25 mm) represents the maximum peel force between the protective film-forming film 13 and the release film 14; β (mN/25 mm) represents the minimum peel force between the pressure sensitive adhesive sheet 16 and the protective film-forming film 13; and γ (mN/25 mm) represents the maximum peel force between the pressure sensitive adhesive sheet 16 and the protective film-forming film 13, the following relationships (1) to (3) hold for α, β, and γ; β≥70 (1) α/β≤0.50 (2) γ≤2000 (3).
Abstract:
A die-bonding layer formation film to be used for fixing a processed product to an adherend, includes an adhesive layer, wherein, the storage elastic modulus has a local minimum value at a temperature within a range of 80° C. to 150° C., wherein the adhesive layer has a shear strength to a peeling strength test substrate of 20 N/2 mm□ [N/(2 mm×2 mm)] or more and 50 N/2 mm□ [N/(2 mm×2 mm)] or less, wherein the shear strength is measured after the processed product is placed above the peeling strength test substrate via the die-bonding layer formation film and the die-bonding layer formation film on the peeling strength test substrate is heated at 175° C. for 1 hour and then further maintained under an environment of 250° C. for 30 seconds. Bubbles (voids) are unlikely to grow at the boundary between the adhesive layer and an adherend even when subjected to thermal history.