Surface acoustic wave filter device

摘要

In an elastic surface wave device according to this invention, an elastic surface wave element including a first and a second two-port surface acoustic wave filter and a one-port surface acoustic wave filter with a single inter-digital transducer is connected via bumps to electrodes formed on a housing by face down bonding techniques. The housing has an opening section for a ground terminal electrode in a part facing the one-port surface acoustic wave filter.