Sealing material with supporting substrate, semiconductor element mounting substrate after sealing, semiconductor element forming wafer after sealing, semiconductor device, and manufacturing method of semiconductor device

摘要

Support base-attached encapsulant for collectively encapsulating a semiconductor device mounting surface of a substrate or semiconductor device forming surface of a wafer, containing a support base having one fibrous film or a plurality of the fibrous films being laminated, the fibrous film subjected to surface treatment with an organosilicon compound, and a resin layer of thermosetting resin formed on one surface of the support base. The support base-attached encapsulant inhibit the substrate or wafer from warping and semiconductor devices from peeling away from the substrate, and collectively encapsulate the semiconductor device mounting surface of the substrate or the semiconductor device forming surface of the wafer even when a large-diameter wafer or large-area substrate is encapsulated. The support base-attached encapsulant has uniformity and homogeneity without opening or tangle of fiber, and is excellent in reliability such as heat resistance, electrical insulation property, moisture resistance, excellent in versatility, economical efficiency, and mass-productivity.