PROTECTIVE FILM FORMATION-USE COMPOSITE SHEET

• Main Authors: SAIKI NAOYA, YONEYAMA HIROYUKI
• Format: Patent
• Language: English; Korean
• Published: 05.04.2016
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; SEMICONDUCTOR DEVICES; USE OF MATERIALS AS ADHESIVES

기재(21)의 일방의 면측에 점착제층(22)이 적층되어 이루어지는 점착 시트(2)와, 점착 시트(2)의 점착제층(22)측에 적층된 보호막 형성 필름(3)을 구비하고 있으며, 점착 시트(2)가 당해 점착 시트(2)를 두께 방향으로 관통하는 관통공을 갖지 않고, 적분구를 사용하여 측정되는 점착 시트(2)의 파장 532㎚의 광선 투과율이 75∼85％인 보호막 형성용 복합 시트(1). 이러한 보호막 형성용 복합 시트(1)에 의하면, 관통공을 갖지 않은 점착 시트를 사용하면서도, 보호막 형성 필름(보호막)에 대해 레이저 인자를 행하였을 때, 점착 시트와 보호막 형성 필름(보호막) 사이에 가스 고임이 발생하는 것을 억제할 수 있다. 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).