METHOD FOR PRODUCING OPTICAL MEMBER, MOLD FOR IMPRINT, AND OPTICAL MEMBER

• Main Authors: KAJITANI SHUNICHI, KANASUGI SHUNSUKE
• Format: Patent
• Language: English; Japanese
• Published: 26.07.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To reduce variation in a thickness of an uncured resin layer during transfer in imprint molding.SOLUTION: A method for producing an optical member includes: a resin supply step of supplying an uncured resin composition 600 onto a surface of a substrate 500 of the optical member; and a transfer step of transferring a fine uneven structure of a mold 10 to the uncured resin composition 600. The mold 10 has a laminated structure in which a mold substrate 12, an adhesive film 14, and a film mold 16 having a fine uneven structure are laminated in this order. The mold substrate 12 has a thickness of 0.5 mm or more and a Shore A hardness of 90 degrees or more. The adhesive film 14 is a film having adhesiveness on both sides, and an adhesive strength of a surface of the adhesive film 14 facing the film mold 16 is weaker than the adhesive strength of the surface facing the mold substrate 12.SELECTED DRAWING: Figure 6 【課題】インプリント成形において、転写する際の未硬化樹脂層の厚みのバラツキを低減する。【解決手段】光学部材の製造方法は、光学部材の基材５００の表面に、未硬化の樹脂組成物６００を供給する樹脂供給工程と、金型１０の微細凹凸構造を未硬化の樹脂組成物６００に転写する転写工程と、を含み、金型１０は、金型基板１２と、粘着フィルム１４と、微細凹凸構造を有するフィルムモールド１６とがこの順で積層された積層構造を有し、金型基板１２は、０．５ｍｍ以上の厚み、および、９０度以上のショアＡ硬度を有し、粘着フィルム１４は、両面に粘着性を有するフィルムであり、粘着フィルム１４のフィルムモールド１６側の面の粘着力は、金型基板１２側の面の粘着力より小さい。【選択図】図６