Patent ID: 8471434

Claim:
A surface acoustic wave device comprising: an IDT which is disposed on a main plane of any one of a first quartz substrate with Euler angles of (−60°≦φ≦60°, 1.7845×10 −9 ×|φ| 6 +2.2009×10 −17 ×|φ| 5 −1.1608×10 −5 ×|φ| 4 −4.6486×10 −13 ×|φ| 3 +1.8409×10 −2 ×|φ| 2 −3.1338×10 −9 ×|φ|+1.1803×10 2 ≦θ≦1.7845×10 −9 ×|φ| 6 +2.2009×10 −17 ×|φ| 5 −1.1608×10 −5 ×|φ| 4 −4.6486×10 −13 ×|φ| 3 +1.8409×10 −2 ×|φ| 2 −3.1338×10 −9 ×|φ|+1.4303×10 2 , 2.5961×10 −9 ×|φ| 6 +1.2224×10 −17 ×|φ| 5 −1.6416×10 −5 ×|φ| 4 −3.2260×10 −13 ×|φ| 3 +2.5407×10 −2 ×|φ| 2 −1.2131×10 −9 ×|φ|+4.2235×10≦ψ≦2.5961×10 −9 ×|φ| 6 +1.2224×10 −17 ×|φ| 5 −1.6416×10 −5 ×|φ| 4 −3.2260×10 −13 ×|φ| 3 +2.5407×10 −2 ×|φ| 2 −1.2131×10 −9 ×|φ|+4.9905×10), a second quartz substrate with Euler angles of (−60°≦φ≦60°, 6.7778×10 −7 ×|φ| 6 −1.2200×10 −4 ×|φ| 5 +8.1111×10 −3 ×|φ| 4 −2.4133×10 −1 ×|φ| 3 +3.0521×|φ| 2 −1.2247×10×|φ|+1.1700≦θ≦6.7778×10 −7 ×|φ| 6 −1.2200×10 −4 ×|φ| 5 +8.1111×10 −3 ×|φ| 4 −2.4133×10 −1 ×|φ| 3 +3.0521×|φ| 2 −1.2247×10×|φ|+1.4200, 2.7816×10 −9 ×|φ| 6 +2.7322×10 −17 ×|φ| 5 −1.7524×10 −5 ×|φ| 4 −1.1334×10 −13 ×|φ| 3 +2.7035×10 −2 ×|φ| 2 −9.9045×10 −10 ×|φ|+1.3504×10 2 ≦ψ≦2.7816×10 −9 ×|φ| 6 +2.7322×10 −17 ×|φ| 5 −1.7524×10 −5 ×|φ| 4 −1.1334×10 −13 ×|φ| 3 +2.7035×10 −2 ×|φ| 2 −9.9045×10 −10 ×|φ|+1.427×10 2 ), and a third quartz substrate with Euler angles of (−60°≦φ≦60°, −2.5000×10 −8 ×|φ| 6 +4.5000×10 −6 ×|φ| 5 −3.1667×10 −4 ×|φ| 4 +1.1000×10 −2 ×|φ| 3 −1.8308×10 −1 ×|φ| 2 +9.0500×10 −1 ×|φ|+3.2000×10≦θ≦−2.5000×10 −8 ×|φ| 6 +4.5000×10 −6 ×|φ| 5 −3.1667×10 −4 ×|φ| 4 +1.1000×10 −2 ×|φ| 3 −1.8308×10 −1 ×|φ| 2 +9.0500×10 −1 ×|φ|+5.7000×10, −4.3602×10 −9 ×|φ| 6 −1.2360×10 −17 ×|φ| 5 +2.7151×10 −5 ×|φ| 4 +3.2536×10 −14 ×|φ| 3 −4.1462×10 −2 ×|φ| 2 −9.4085×10 −10 ×|φ|+8.9090×10≦ψ≦−4.3602×10 −9 ×|φ| 6 −1.2360×10 −17 ×|φ| 5 +2.7151×10 −5 ×|φ| 4 +3.2536×10 −14 ×|φ| 3 −4.1462×10 −2 ×|φ| 2 −9.4085×10 −10 ×|φ|+9.6760×10), and which excites a surface acoustic wave in an upper mode of a stop band.