METHOD FOR MANUFACTURING SEALING RESIN SHEET

摘要

In order to manufacture a sealing resin sheet for insulating and sealing a plurality of electronic components mounted on a substrate at low cost and suppress mixing of air bubbles into the sealing resin sheet, in the first step, a resin body (22) in a semi-cured state is disposed in a space (26) surrounded by a pair of pressing plates (23, 25) facing each other and a side plate (24) provided on the outer peripheral side. In the second step, a vacuum is drawn into the space (26), and the resin body (22) is heated at a temperature lower than a curing temperature and extended by being pressed at a pressing speed of 0.004-0.06 mm/sec (inclusive) by the pressing plates (23, 25). Consequently, a sealing resin sheet (11) is produced.