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Method for optimizing piezoelectric resonator-based networks    
United States Patent5404628   
Link to this pagehttp://www.wikipatents.com/5404628.html
Inventor(s)Ketcham; Richard S. (Ames, IA)
AbstractThe method comprises decomposing an original resonator within a network into a pair of series connected resonators to add an additional connecting electrode to the network. The pair of resonators are series connected by a shared electrode. To preserve the original electrical characteristics of the network, the composite characteristics of the series connected resonators are chosen to match those of the original resonator. With this method, the additional electrode is placed on a surface of the piezoelectric material opposing the surface to which the shared electrode is mounted. The method allows for the addition of an electrode to a piezoelectric resonator-based network so that the electrodes which connect the network to other circuitry may be placed where desired. This may be on the upper surface of the piezoelectric material for connection to discrete components or on the lower, buried surface for connection to buried layers of an adjacent integrated circuit.
   














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Drawing from US Patent 5404628
Method for optimizing piezoelectric resonator-based networks - US Patent 5404628 Drawing
Method for optimizing piezoelectric resonator-based networks
Inventor     Ketcham; Richard S. (Ames, IA)
Owner/Assignee     TFR Technologies, Inc. (Redmond, OR)
Patent assignment
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Publication Date     April 11, 1995
Application Number     08/047,720
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     April 14, 1993
US Classification     29/25.35 427/100
Int'l Classification     H01L 041/22
Examiner     Hall; Carl E.
Assistant Examiner    
Attorney/Law Firm     Klarquist Sparkman Campbell Leigh & Whinston
Address
Parent Case     This is a division of application Ser. No. 07/628,440, filed Dec. 14, 1990, and now U.S. Pat. No. 5,231,327.
Priority Data    
USPTO Field of Search     29/25.35 427/100 310/320 310/321 310/366 333/187 333/188 333/189 333/190 333/191
Patent Tags     optimizing piezoelectric resonator-based networks
   
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I claim:

1. A method of optimizing the implementation of a piezoelectric resonator-based network, comprising the following steps:

decomposing an original resonator in the network into a pair of series connected resonators to add an additional electrode to the network;

connecting the pair of resonators to a shared electrode mounted to a surface of the piezoelectric material;

placing the additional electrode on a surface of the piezoelectric material opposing the surface to which the shared electrode is mounted; and

matching the characteristics of the series connected resonators with those of the original resonator to preserve the characteristics of the original resonator.

2. The method of claim 1 in which the piezoelectric resonator has first and second electrodes on opposing surfaces of the piezoelectric material, and the added electrode is placed on the same surface of the piezoelectric material as the first electrode is placed.

3. The method of claim 1 in which decomposing an original resonator comprises:

locating a piezoelectric resonator in the network; and

replacing the resonator with two series connected resonators which are the only connections to the shared electrode.

4. The method of claim 1 in which matching the characteristics of the series connected resonators with those of the original resonator comprises:

placing two electrodes on one surface of the piezoelectric material; and

placing the shared electrode on the other surface of the material in overlapping relation to the two electrodes to create the pair of series connected resonators.

5. The method of claim 4 in which the electrodes are placed to create two series connected resonators having the equivalent series capacitance of the original resonator.

6. A method for optimizing the implementation of a piezoelectric resonator for connecting the resonator to other circuitry, the resonator compri