Patent ID: 7626258
Filing Date: 2009-12-01
Classification: B81B,H04B

Abstract:
1. A cap wafer for packaging at least one circuit element formed on a base wafer comprising: a cap wafer substrate; at least one penetrated electrode formed to penetrate the cap wafer substrate; and at least one first electrode pad connected with a lower portion of the penetrated electrode on a lower surface of the cap wafer substrate for electrically coupling the penetrated electrode to the circuit element, wherein the penetrated electrode has an oblique section which gradually widens from an upper surface to the lower surface of the cap wafer substrate, and wherein the at least one penetrated electrode is formed to expose an upper portion thereof to the outside while penetrating the cap wafer substrate by thinning the upper surface of the cap wafer substrate in which the at least one penetrated electrode is formed when the cap wafer substrate and the base wafer are in a bonded state.