Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1980-02-04
1982-07-13
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310363, 310800, H01L 4108
Patent
active
043396836
ABSTRACT:
A mechanical and electrical connection for a piezoelectric member of polyic material such as polyvinylidene fluoride, and method for forming such a connection. To form the connection, the piezoelectric member is first masked to prevent a preselected portion of its surface from being coated during subsequent coating operations. An electrically conductive member such as a lead wire or a solderable terminal is then attached to the nonmasked area of the piezoelectric member with adhesive such as epoxy. The masked piezoelectric member, the electrically conductive member, and (incidentally) the mask are then coated with a conductive coating such as sputtered gold to electrically connect the conductive member to the piezoelectric member. The mask can now be removed from the piezoelectric member if desired, although it can be left in place as a convenient vise. If the conductive member is a wire, adjacent portions of the wire and the piezoelectric member can now be coated with additional epoxy to provide heat dissipation for and protect the electrical connection provided by the conductive coating, and to insure mechanical strength of the contact. If the conductive member is a terminal strip or solderable terminal, a wire can now be soldered to the conductive coating at the terminal using low temperature solder. The solder joint can then be coated with silver-filled paint to produce a lower current density and lower contact resistance in the vicinity of the contact.
REFERENCES:
patent: 2235489 (1941-03-01), Rath
patent: 2648785 (1953-08-01), Tournier
patent: 2657320 (1953-10-01), Ziegler
patent: 3948089 (1976-04-01), Shaw et al.
Bloomfield Philip
McMahon Karen M.
Scott William R.
Weist William T.
Budd Mark O.
Hansen Henry
Sciascia R. S.
The United States of America as represented by the Secretary of
Weinstein Stanton D.
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