Patent ID: 8044507
Filing Date: 2011-10-25
Classification: B29C,H01L

Abstract:
1. A sealing apparatus for sealing a semiconductor wafer having semiconductor elements on its surface by resin, comprising: an upper mold; and a lower mold having an area where the semiconductor wafer is to be mounted directly, the lower mold having an uneven surface in the area, wherein the uneven surface has a roughness in a range between 8 μm and 12 μm, wherein the lower mold has a first area on which the semiconductor wafer is to be mounted, such that the entire first area is covered by a lower surface of the semiconductor wafer, and the lower surface of the semiconductor wafer has an equal area to the first area, the first area including a second area and a third area, the uneven surface of the lower mold is formed within the second area, and the uneven surface is not formed in the third area by which the second area is surrounded, and wherein the second area is smaller than the area of the lower surface of the semiconductor wafer.