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1. 发明授权

US06465937B1 Single crystal thickness and width cuts for enhanced ultrasonic transducer 有权
标题翻译：增强超声波换能器的单晶厚度和宽度切割
公开(公告)号：US06465937B1
公开(公告)日：2002-10-15
申请号：US09521167
申请日：2000-03-08
申请人： Jie Chen , Rajesh Kumar Panda , Turuvekere R Gururaja , Heather Beck
发明人： Jie Chen , Rajesh Kumar Panda , Turuvekere R Gururaja , Heather Beck
IPC分类号： H01L4104
CPC分类号： H01L41/1875 , H01L41/18
摘要： This invention is directed to a transducer comprising a lead-based single crystal wherein the crystal is diagonally oriented and has an effective coupling constant of at least 0.70. In one embodiment, the lead-based crystal has the formula Pb(B′B″)O3—PbTiO3 wherein B′ is Mg2+, Zn2+, Ni2+ or Sc3+ and B″ is Nb5+, Ta5+ or W6+. Preferably, the lead-based crystal has of the formula Pb(B′B″)O3—PbTiO3 where B′ is Mg2+, Zn2+, Sc3+ and B″ is Nb5+ or more specifically Pb(Mg1/3Nb2/3)O3—PbTiO3 (“PMN—PT”), Pb(Zn1/3Nb2/3)O3—PbTiO3 (“PZN—PT”), and Pb(Sc1/3Nb2/3)O3—PbTiO3 (“PSN—PT”). The invention also includes a transducer comprising a plurality of lead-based single crystal transducers. In one embodiment the ultrasonic probe comprising one or more piezoelectric components having surfaces that function as transmitting and/or receiving elements; and electrodes placed upon opposite surfaces of the elements, and wherein each lead based piezoelectric component as described above. In addition, the invention includes improved materials for reduced spurious modes. Furthermore, the invention includes diagonally oriented lead-based transducers.
摘要翻译：本发明涉及一种包含铅基单晶的换能器，其中晶体是对角线取向的，并且具有至少0.70的有效耦合常数。在一个实施方案中，铅基晶体具有式Pb（B'B“）O3-PbTiO3，其中B'是Mg2 +，Zn2 +，Ni2 +或Sc3 +，B”是Nb5 +，Ta5 +或W6 +。优选地，铅基晶体具有式Pb（B'B“）O3-PbTiO3，其中B'是Mg2 +，Zn2 +，Sc3 +和B”是Nb5 +或更具体的是Pb（Mg1 / 3Nb2 / 3）O3- PbTiO3（“PMN-PT”），Pb（Zn1 / 3Nb2 / 3）O3-PbTiO3（“PZN-PT”）和Pb（Sc1 / 3Nb2 / 3）O3-PbTiO3（“PSN-PT” 还包括包括多个基于铅的单晶振子的换能器。在一个实施例中，超声波探头包括一个或多个具有用作发射和/或接收元件的表面的压电元件; 以及设置在元件的相对表面上的电极，并且其中每个基于铅的压电元件如上所述。此外，本发明包括用于减少杂散模式的改进材料。此外，本发明包括对角定向的基于铅的换能器。

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