Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2004-03-12
2008-09-23
Winakur, Eric F (Department: 3768)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C600S459000
Reexamination Certificate
active
07427825
ABSTRACT:
Electrical interconnects are provided for CMUTs. For example, electrodes within the silicon substrate, such as the electrodes at the bottom of the void below membranes, are interconnected together within the substrate. The interconnected electrode may then be used as the grounding electrode. By providing interconnection within the substrate and below the membranes, space for vias and the associated connection between the electrodes on an exposed surface of the substrate is minimized. As another example, an electrical conductor is formed on the side of the silicon substrate rather than the top of the substrate. Conductors on the side may allow routing signals from a top surface to a bottom surface without large wire bonding pads. Alternatively, conductors on the edge provide additional space for wire bonding pads. As yet another example, polymer material used as a matching or protection layer is formed on the top surface of the CMUT with electrical traces routed within the polymer. By using multiple layers of polymer, multiple layers of electrical conductors may be routed without interference.
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Barnes Stephen R.
Bolorforosh Mirsaid
Frey Gregg W.
Palczewska Grazyna M.
Rozanski Michael
Siemens Medical Solutions USA , Inc.
Winakur Eric F
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