Lintec Corporation

Hiroyuki Yoneyama

Daisuke Yamamoto

Naoya Saiki

Youichi Inao

Ken Takano

Provided is a sheet () for forming protective film, including: a protective film-forming film () characterized in that the light transmittance thereof at a wavelength of 1600 nm of 72% or more, and the light transmittance thereof at a wavelength of 550 nm of 20% or less; and a release sheet () laminated upon one or both faces of the protective film-forming film (). According to this sheet () for forming a protective film, it is possible to form a protective film that allows for the inspection of cracks, etc., on a workpiece or a product obtained by processing the workpiece, while preventing grinding marks on the workpiece or the product from being visible to the naked eye.

Protective film-forming film, sheet for forming protective film, complex sheet for forming protective film, and inspection method

A protective film forming filmis provided in which the product of the breaking stress (MPa) measured at a measurement temperature of 0&#xb0; C. and the breaking strain (unit: %) measured at a measurement temperature of 0&#xb0; C. in at least one of the protective film forming filmand a protective film formed from the protective film forming filmis in a range of 1 MPa&#xb7;% to 250 MPa&#xb7;%. According to such a protective film forming film, the protective film forming filmor the protective film formed from the protective film forming filmcan be suitably divided in an expanding process performed on a workpiece when the workpiece is divided to obtain a work product.

Protective film forming film, protective film forming sheet and work product manufacturing method

Provided is a sheetfor forming a protective film including a protective film-forming filmof 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 sheetwhich is laminated on one or both surfaces of the protective film-forming film. According to such a sheetfor 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.

Protective film forming film, sheet for forming protective film, and inspection method

A protection membrane-forming film () containing a filler, wherein the average particle size of the filler is not more than 0.4 &#x3bc;m, a protection membrane-forming sheet (), a production method and an inspection method for a workpiece or a processed product which use the film and the sheet, and a workpiece and a processed product determined as adequate products by the inspection method. The protection membrane-forming film and the protection membrane-forming sheet of the invention enable the formation of a protection membrane having excellent print legibility when subjected to print processing by laser irradiation.

Protection membrane forming film, protection membrane forming utilization sheet, production method and inspection method for workpiece or processed product, workpiece determined as adequate product, and processed product determined as adequate product

A protective film-forming composite sheetcomprises a pressure sensitive adhesive sheetin which a pressure sensitive adhesive layeris provided on a base material, a protective film-forming film, and a release film. When &#x3b1; (mN/25 mm) represents the maximum peel force between the protective film-forming filmand the release film; &#x3b2; (mN/25 mm) represents the minimum peel force between the pressure sensitive adhesive sheetand the protective film-forming film; and &#x3b3; (mN/25 mm) represents the maximum peel force between the pressure sensitive adhesive sheetand the protective film-forming film, the following relationships (1) to (3) hold for &#x3b1;, &#x3b2;, and &#x3b3;;&#x3b2;&#x2265;70&#x2003;&#x2003;(1)&#x3b1;/&#x3b2;&#x2264;0.50&#x2003;&#x2003;(2)&#x3b3;&#x2264;2000&#x2003;&#x2003;(3).

Composite sheet for forming protective film

Provided is protective film-forming sheet () including: a protective film-forming film () having a light transmittance at a wavelength of 1064 nm of 55% or greater and a light transmittance at a wavelength of 550 nm of 20% or less; and a release sheet () which is laminated on one or both faces of the protective film-forming film (). According to this protective film-forming sheet (), it is possible to form a protective film which allows a workpiece such as a semiconductor wafer to have a modified layer disposed in advance therein by a laser so that the workpiece can be split through the application of force thereon, while preventing grinding marks on the workpiece or a product formed therefrom from being visible to the naked eye.

Protective film-forming film, sheet for forming protective film, complex sheet for forming protective film, and method of producing manufactured product

A composition for protective film formation capable of forming a protective film excellent in attachability by a tape mounter or the like, with good visibility at a laser-printed portion and heat dissipation properties, allowing a protective film-equipped chip having high reliability to be manufactured, and a sheet for protective film formation and a protective film-equipped chip are provided. The composition for protective film formation contains a polymer component (A), a curable component (B), and a heat conductive filler (C) having an average particle size of 2.0 to 10.0 &#x3bc;m. The content of components that are liquid at 25&#xb0; C. contained in the composition for protective film formation is 20 to 70 parts by mass relative to 100 parts by mass of the total of the (A) component and the (B) component.

Growing community of inventors

Nagareyama, Japan

Hiroyuki Yoneyama