FILTER DEVICE, METHOD OF MANUFACTURING FILTER DEVICE, AND DUPLEXER

摘要

PROBLEM TO BE SOLVED: To provide a filter device, a method of manufacturing a filter device, and a duplexer which implement miniaturization while ensuring a satisfactory isolation characteristic.SOLUTION: A transmission/reception filter (filter device) 101 according to one embodiment includes a transmission side filter 101T, a reception side filter 101R and a support substrate 101s. The transmission side filter 101T includes a first resonator ER11 comprising a BAW device (FBAR, SMR). The reception side filter includes a second resonator ER12 comprising a Lamb wave device. The support substrate 101s supports both the transmission side filter 101T and the reception side filter 101R. The transmission side filter 101T and the reception side filter 101R comprise elastic wave resonators that resonate in different vibration modes from each other, which can implement miniaturization of the support substrate 101s while preventing a vibration interference between the two filters.