COMPOSITE SHEET FOR PROTECTIVE FILM FORMATION AND METHOD FOR PRODUCING SAME

• Main Authors: SAIKI NAOYA, FURUNO KENTA
• Format: Patent
• Language: Chinese; English
• Published: 28.07.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

The present invention relates to a composite sheet for protective film formation, which is provided with: a support sheet that comprises a base material and an adhesive layer on the base material; anda film for protective film formation, which is arranged on the adhesive layer of the support sheet. This composite sheet for protective film formation is configured such that: the adhesive layer-sidesurface of the base material is a recessed and projected surface; and if test pieces are cut out of the composite sheet for protective film formation at five different positions and the interlayer distance between the film for protective film formation and the support sheet in a non-bonded region is measured with respect to these five test pieces, the interlayer distances are 0.5 um or less. 本发明涉及一种保护膜形成用复合片，其具有具备基材且在所述基材上具备粘着剂层的支撑片，并在所述支撑片中的粘着剂层上具有保护膜形成用膜，所述基材的所述粘着剂层侧的面为凹凸面，从所述保护膜形成用复合片的5处裁切试验片，并分别对这5片试验片的所述保护膜形成用膜与所述支撑片的非贴合区域的层间距离进行测定时，所述层间距离为0.5μm以下。