摘要:
The present invention provides a method of manufacturing a high aspect ratio structure with a concave portion (134) having a side surface perpendicular to a principal surface of a substrate (13a) by wet etching and a method of manufacturing an ultrasonic probe. The method of manufacturing a high aspect ratio structure includes: a hole forming step of forming a plurality of holes in at least one principal surface of a substrate (13a) ; a resist forming step of forming a first area (141) with a resist layer (133) and a second area (142) without the resist layer (133) on the principal surface provided with the plurality of holes after the hole forming step ends; and a concave portion forming step of immersing the substrate (13a) into an etching solution to form a concave portion (134) in the substrate (13a) corresponding to the second area (142).
摘要:
A method of fabricating an acoustic transducer comprising: fabricating a substrate; depositing a bottom electrode on the substrate; depositing an active layer on the bottom electrode; depositing a top electrode on the active layer; wherein at least one electrode is patterned to form at least two active elements; and, wherein a ratio of a thickness coupling coefficient kt to an effective lateral coupling coefficient k31,eff of the active layer is 1.3 or greater.
摘要:
The present disclosure provides a method of fabricating an ultrasound transducer. A substrate having a first side and a second side opposite the first side is provided. A bottom electrode is formed over the first side of the substrate. A piezoelectric element is formed over the bottom electrode. The piezoelectric element has a chamfered sidewall. A top electrode is formed over the piezoelectric element. A step metal element is formed over a portion of the top electrode proximate to the chamfered sidewall of the piezoelectric element.
摘要:
An ultrasonic piezoelectric transducer is alternatingly operated in a transmitting mode and in a receiving mode. In the transmitting mode an electrical excitation signal is applied between one or more common electrodes and one or more transmission electrodes, and in the receiving mode an electrical reception signal is collected between the one or more common electrodes and one or more reception electrodes. Moreover, in the receiving mode one or more electrodes which are not used as reception electrodes are connected via a low impedance connection with the one or more common electrodes which has the effect that in the receiving mode the resonance frequencies of the piezoelectric transducer are shifted to lower values so that with the same operating frequency the piezolectric transducer is in series resonance in the transmitting mode and in parallel resonance in the receiving mode. In this way, the piezoelectric transducer operates under optimum conditions with perfect frequency matching both for transmission and for reception.
摘要:
Un élément indicateur de charge (25) et un organe de fixation (10) indicateur de charge sont décrits et revendiqués. Un transducteur ultrasonique (19), agencé sur une surface (15) d'un élément porteur de charge, tel qu'un organe de fixation, est utilisé pour déterminer la longueur, la contrainte ou autre caractéristique dépendant de la charge de traction de l'élément en utilisant des techniques ultrasoniques.
摘要:
According to some embodiments, a method of depositing at least one electrode on a base member of an ultrasound transducer comprises at least partially etching a surface of the base member using a first etching agent, catalyzing the surface of the base member using a first catalyst, plating copper on the surface of the base member using an electroless plating process, inspecting the copper plated on the surface of the base member, at least partially etching a surface of the copper-plated surface using a second etching agent, catalyzing the copper-plated surface using a second catalyst, plating nickel on the copper-plated surface using an electroless plating process and depositing at least one layer of gold on the nickel-plated surface.
摘要:
Die Erfindung betrifft eine Ultraschallbaugruppe mit einer Leiterplatte (10), an welcher mindestens ein Ultraschallwandler (20) zum Aussenden und/oder Empfangen von Ultraschallwellen, Elektronikmittel (30) zum Ansteuern des Ultraschallwandlers und/oder zum Verarbeiten von Ultraschallwellen, die von dem Ultraschallwandler nachgewiesen werden, und Befestigungsmittel (40) zum Montieren der Ultraschallbaugruppe an einem Einsatzort angeordnet sind. Dabei weist der Ultraschallwandler ein Piezoelement mit einer ersten und einer zweiten metallischen Beschichtung als Elektroden auf. Die erste metallische Beschichtung ist mindestens an einer der Leiterplatte zugewandten Seite des Piezoelements ausgebildet und die zweite metallische Beschichtung erstreckt sich von einer der Leiterplatte abgewandten Seite des Piezoelements durchgängig bis zu der der Leiterplatte zugewandten Seite. Die Ultraschallbaugruppe ist erfindungsgemäß dadurch gekennzeichnet, dass die erste und die zweite metallische Beschichtung flächig mit auf der Leiterplatte vorhandenen elektrischen Kontakten verbunden sind und dass der Ultraschallwandler flächig auf der Leiterplatte aufliegend montiert ist. Die Erfindung betrifft außerdem ein Ultraschall-Sensorsystem.