Patent ID: 8525615
Filing Date: 2013-09-03
Classification: H01L,H03H

Abstract:
1. An elastic wave duplexer comprising: a substrate; a transmission elastic wave filter element that is flip-chip mounted to a principal surface of the substrate; a reception elastic wave filter element that is flip-chip mounted to the principal surface of the substrate; and a sealing member arranged on the principal surface of the substrate to cover at least one of the transmission elastic wave filter element and the reception elastic wave filter element flip-chip mounted to the principal surface of the substrate, which seals off at least one of the transmission elastic wave filter element and the reception elastic wave filter element; wherein the sealing member includes a recess provided either in a transmission-element-covering region which faces the transmission elastic wave filter element on a side opposite from the substrate with respect to the transmission elastic wave filter element, or in a reception-element-covering region which faces the reception elastic wave filter element on a side opposite from the substrate with respect to the reception elastic wave filter element, such that the transmission-element-covering region and the reception-element-covering region have different thicknesses.